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1. Front side Main B The interior of the electrical control box Main C oo ea c g l A Porti NF3 TF puc ortion BI maed wis NF2 i BING holder l E DM E a PCB es Ipi TA FANMI WwW m P PCB Fixi H x ixing Holder 10 nm m jo h 9 A RAS 18 24FSN2 only Front side Auxiliary Ly RAS 18 24FSN 2 only RAS 14FSN2 to RAS 24FSN2 220V 60Hz Front side Main The interior of the electrical control box Main B EF11 EF12 i a 5 j om x LL LEI T3 E E dj EF1 FANM 9 my URs EF2 q PCBI EFS EE 2 FANM1 cB cuc2 r Front side Auxiliary 0 0 RAS 18 20FSN2 RAS 22 24FSN2 PCB1 Control PCB in Outdoor Unit PCB2 Inverter PCB IPM Transistor Module FANM1 2 Fan Module DM Diode Module DCL Reactor TF1 Transformer NF1 2 3 Noise Filter R
2. SMGB0049 rev 2 08 2010 LED INDICATION mam aa pos TUE Power Source for PCB1 E a PEE 14 ae Normal Condition Activated amp a 5 Abnormal Condition Deactivated Et 8 iik This LED2 indicates the transmission state a 15 LED2 between the PCB1 and PCB2 apl e lle Green Normal Condition Flickering Ta le Abnormal Condition Activated or Deactivated alma ie This LED3 indicates the transmission state iab Las 4g LEDS between the indoor unit and outdoor unit FELD ow 3 8 Yellow Normal Condition Flickering 8 i on Abnormal Condition Activated or Deactivated E eF ags Qe B se esi ooo Us alis si i aa 3 8 LITTIT z 8 ETEO i B alls 3 a 7 ee c all PESTO DN EO Ji C 4 No Part Name Contents of functions No Part Name Contents of functions 1 DSW1 amp Setting of Outdoor Unit Number 6 DSW6 Setting o
3. SEG2 SEG1 SEG2 SEG1 Control of the wa ri Not Available Not prepared IT Lu r1 Not Available indoor unit fan dur F Ft Li l I Lt ing Thermo OFF in heating mode PSW2 PSW2 BSW PSW1 SET SET Available Suns f Available PSW3 Long piping setting LI r1 Not Available Cancelation of LI r1 Not Available r Ft Li outdoor ambient Lot Li temperature limit of Psw2 heating PSW2 SUA sm PSW1 SET Available Available I Pswa PSW3 Cancelation of mr r1 Not Available Low noise setting AL r1 Not Available outdoor ambient LU Lt LU Lt Lt temperature limit of ME PSW2 cooling PSW2 PSW1 PSW1 SET SET Available Available mE PSW3 t Change of defrost r1 Not Available Fixing on demand n r1 Not Available condicion LUCI Lt function LL Lt PSW2 PSW2 PSW1 PSW1 SET SET Available Available PSW3 I PSW3 Slo defrost setting 1 Not Available Wave function setting Nd r1 Not Available LUZ Lt LUZ Lt PSW2 PSW1 ids PSW1 SET SET Available Available I PSW3 PSW3 Cancellation of out LO r1 Not Available Cold draft protec p Not Available door hot start limit w i m L ri 0 Lt tion 1 rc Li PSW2 PSw1 eT PSW1 SET SET Available Available PSW3 t PSW3 p bui EN V1 Not Available Cold draft prote
4. i Auxiliary Electrical I 1 I 1 1 Control Box Electrical Control Box li for Transmission MP 2 Mou ii r uy i I d IN i z w N l age gi H wae E THM10 vss T Bi MC3 Met l l l li THM17 Tchg THM16 THM15 THM11 THM23 TE4 TE3 TE2 Tsc Thermistor for liquid pipe position SMGB0049 rev 2 08 2010 Outdoor units FSN2 239 HITACHI Inspire the Next 9 1 14 Removing thermistor for ambien 1 Remove the front service panel according to the item Removing Front Service Panel 2 Remove each four 4 screws fixing the electrical control box cover and remove the electrical control box cover 3 Remove screws fixing the upper cover as shown in the figure and remove the upper cover RAS 8FSN2 to 12FSN2 eight 8 screws RAS 14FSN2 to 24FSN2 sixteen 16 screws RAS 26FSN 2 to 42FSN2 twenty four 24 screws RAS 44FSN 2 to 48FSN2 thirty two 32 screws NOTE When removing the upper cover pay attention not to damage the shroud To electrical control box Ta Thermistor for ambient Temp Thermistor holde Servicing Service Manual 4 Remove the air intake grille according to the item Removing Air Intake Grille 5 Remove the fixing clamps for wiring Reassemble the thermistor for ambient temperature
5. FTD o PARRA As DSWLO a u d 32823 ES ee TTT ae Y Bg E Le LED _ E aaraa Se o F a p DW mI Gogga d a E o E PSWIPEWZPSHI s m k L EH aurca E DSW5 ON mm 123 NOTES Measure the insulation resistance of constant speed compressor Do not perform the emergency operation when the insulation resistance is 0 O Other compressor may be damaged because there is a possibility that refrigerant oil may be oxidized In this emergency operation compressor frequency cannot be controlled at each 1 Hz Therefore alarm code 07 43 44 45 45 or 47 may be indicated on LCD This emergency operation does not provide sufficient cooling and heating capacity This method is an emergency and temporary operation when the constant speed compressor is damaged Therefore change the new one as soon as possible Turn OFF DSW5 on outdoor PCB1 after replacing the compressor If this setting is not performed the constant speed compressor will be damaged Troubleshooting Service Manual E Method of collecting refrigerant 1 In case that compressor operates Perform only when collecting refrigerant is required HITACHI Inspire the Next process Procedure Remarks No 1 Turn OFF the main switch
6. RAS 14 48FSN 2 Electrical equipment Number LAE Remarks Part name U01A 8HP 48HP HIGH PRESSURE PRESSURE SW U01B 8HP 48HP PD cnn BHECAGHE PRESSURE SENSOR U04A 8HP 12HP FOR DC FAN 12A 14HP 48HP FOR DC FAN MOF1 2 12A U04B 8HP 12HP FOR INV COMP 40A 14HP 48HP FOR INV COMP MC1 40A U04C 14HP 24HP FOR CONSTANT SPEED COMP MC2 32A 26HP 48HP FOR CONSTANT SPEED COMP MC2 40A Hee U04D 18HP 20HP FOR CONSTANT SPEED COMP MC3 32A 22HP 48HP FOR CONSTANT SPEED COMP MC3 40A U04E 30HP 42HP FOR CONSTANT SPEED COMP MC4 32A 44HP 48HP FOR CONSTANT SPEED COMP MC4 40A U04F 38HP 48HP FOR CONSTANT SPEED COMP MC5 40A U04G 44HP 48HP FOR AC FAN MOF4 12A U14A 8HP 48HP FOR INV COMP 4700uF CB1 CB2 U14B 8HP 12HP FOR DC FAN 1800F CB3 14HP 28HP FOR DC FAN 1800uF CB3 CB4 CAPACITOR 30HP 48HP FOR DC FAN MOF 1 2 1800uF CB3 CB4 U14C 26HP 42HP FOR AC FAN MOF2 16uF 44HP 48HP FOR AC FAN MOF2 4 16uF U15A 8HP 48HP TA U15B 8HP 12HP TD1 14HP 48HP TD1 2 U15C 18HP 42HP TD3 44HP 48HP TD3 4 U15D 8HP 12HP FOR INV FIN 14HP 42HP TE1 TSC 44HP 48HP TD5 U15E 14HP 42HP TE2 THERMISTOR 44HP 48HP TE1 TSC U15F 14HP 24HP TCHG 26HP 42HP TE3 44HP 48HP TE2 U15G 26HP 42HP TCHG 44HP 48HP TE3 4 U15H 44HP 48HP TCHG U15i 14HP 48HP FOR INV FIN U17 8HP 48HP IPM TRANSISTOR MODULE U18 8HP 48HP DM D
7. Outdoor units piping installation 1 e Model Refrigerant Gas piping Refrigerant Liquid piping A B C D E F connection connection RAS 8FSN2 19 05 22 2 flare nut 9 53 12 7 flare nut 271 175 175 310 244 RAS 10FSN2 22 2 25 4 flange 9 53 12 7 flange 257 170 258 Mas 25 4 28 6 flange 12 7 15 88 flange 174 RAS 16FSN2 28 6 31 75 flange 12 7 15 88 flange eu RAS 18FSN2 163 248 pub 28 6 31 75 flange 15 88 19 05 flange 282 RAS 24FSN2 RAS 26FSN2 RAS 28FSN2 167 RAS 30FSN2 31 75 34 92 flange 19 05 22 2 flange 263 RAS 32FSN2 170 RAS 34FSN2 acer 143 279 254 RAS 38FSN2 RAS 40FSN2 RAS 42FSN2 38 1 41 3 flange 19 05 22 2 flange RAS 44FSN2 RAS 46FSN2 RAS 48FSN2 SMGBO0049 rev 2 08 2010 25 HITACHI Inspire the Next Piping installation Service Manual D LD D LD b epe epe Hee B C B C Figure 1 Figure 2 D I D D I D 3 D E I D B C B c T Figure 3 Figure 4 Dimensions mm Model Figure A B D ID E ID RAS 10FSN2 Gas 1 95 27 97 22 2 RAS 12FSN2 Gas 1 95 27 85 254 RAS 14FSN2 Gas 2 100 29 87 254 RAS 16 24FSN2 Gas 1 100 29 87 28 6 RAS 26 34FSN2 Gas 3 135 34 116 31 75 34 92 RAS
8. Alarm Code Stoppage Code I8 ue Son 02 Activation of protection device 03 Abnormality transmitting between indoor units 04 Abnormal transmitting between inverter PCB between fan controller 05 Abnormality of picking up phase signal amps 5 6 5 6 Excessively high or low voltage for inverter fan controller or Decrease of TdSH d1 16 retry deis cuin Excessively high discharge gas temp at the top of comp d an Activation of protection device for outdoor fan motor 21 Abnormality of high pressure sensor 22 Abnormality of thermistor for outdoor air temp 23 Abnormality of thermistor for discharge gas temp on the top of comp 24 Abnormality of thermistor for evaporating temp 29 Abnormality of low pressure sensor 31 Incorrect capacity setting between indoor and outdoor units 35 Incorrect indoor unit No setting 38 Abnormality of picking up circuit for protection outdoor unit mm T Abnormality of running current at constant compressor oe Abnormality of low compression ratio d1 11 retry n Abnormality of low pressure increase d1 12 retry 1 Abnormality of high pressure increase d1 13 retry diii s Dun Activation of low pressure decrease protection d1 1 ae 2 4 Activation of overcurrent protection device d1 1 Ti 8 Abnormality of inver
9. SEN 33x fiuc gKSAZt CE SVH HOS ASIF O9U SPE 9 ZNSAZP SE SVE SMGB0049 rev 2 08 2010 Electrical wiring diagrams H ITACH i Electrical wiring Inspire the Next Service Manual zplied Field 8u Location of Main Parts E ME z g k E 2 i ee y a z ji as Le Aiala 5 zou gt 2 ak e 3 UEL e o a8 7 m a e 4 e 2x e a E R n xs 2 e c
10. RAS 26FSN2 to RAS 48FSN2 Auxiliary electrical control box Fixing screw for electrical control box cover Electrical control box Fixing screw for electrical control box cover HITACHI Inspire the Next 4 Disconnect all of the connectors connected to the PCB1 Remove the screws fixing the compressor cable the power source cable and the transmission cables and disconnect them from the electrical control box Disconnect the connectors for fan motors solenoid valve coils reversing valve coils thermistors expansion valve coils wiring for PSH and connectors Lift up the electrical control box to unhook from the side cover Draw the electrical control box forward NOTES Do not pull the cables from the electrical control box forcefully Protect the cables from being caught on the plate edge such as stays RAS 14FSN2 to RAS 24FSN2 Auxiliary electrical control box Electrical control box Electrical control box position SMGBO0049 rev 2 08 2010 Outdoor units FSN2 241 HITACHI I Inspire the Next Service Manual 8 For attaching the electrical box perform the reverse procedures for removing G NOTES 1 Check to ensure that waterproof vinyl pipe edge and connectors are fixed firmly with cord clamp in the electrical box when wiring as shown in the figure below 2 Fix the wiring from
11. Wireless transmission circuit AD Rama Protection A D conversion circuit circuli il ii p circuit Remote control switch TT 1 5 porem Inverter power Bs i 5 5 Inverter section Remote con E 8 mon xi erp Outdoor unit MCU control trol MCU 5 Eg t8 MCU A E lt s S E Clq ra E 1 12 j Electrical trol i Invert expansion valve drive heave c EM esi pia Relay drive circuit eontrel for fan circuit drive circuit MCU E 0 9 To the transmission of the next indoor P it or thi t Indoor unit autor unit Outdoor unit H Link 1 II Symbol Name Symbol Name MC1 DC Motor for Inverter Compressor SVA1 5 Solenoid Valve MC2 5 AC Motor for Constant Speed Compressor SVB SVC SVF SVG Solenoid Valve MOF1 3 DC Motor for Outdoor Fan RVR1 2 Reversing Valve MOF2 4 AC Motor for Outdoor Fan PSH1 5 High Pressure Switch MIF Motor for Indoor Fan Ps Suction Gas Pressure Sensor MS Motor for Auto Louver Pd Discharge Gas Pressure Sensor MV Electronic Expansion Valve for Indoor Unit CTu v 2 5 Current Sensor MV1 4 Electronic Expansion Valve for Outdoor Unit CH1 5 Crankcase Heater MVB Electronic Expansion Valve for Plate Heat Exchanger CMC1 5 Magnetic Contactor for Compressor 50 SMGB0049 rev 2 08 2010 Device control system Control system Service Manual 4 2 Outdoor Units PCB HITACHI Inspire the Next E PCB drawing
12. DH 26 5 Surge Absorber AB 0 m EE m EG gL Jf Ld o e Ho a c l s When the unit is applied the excessive surge current due to lighting 0 UT or other causes it is indicated this alarm code 04 or the inverter Gv stoppage code ITC 11 and the unit can not be operated In this case check to ensure the surge absorber SA on the noise filter NF1 If the inside of the surge absorber is normal turn OFF the power once and wait for PCB2 s LED OFF and turn ON again SMGB0049 rev 2 08 2010 121 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description ir Ll Abnormality of picking up phase signal W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm is displayed when the main power source phase is reversely connected or one phase is not connected Outdoor unit printed circuit board Correctly connect each phase of the power source PCB1 Single phase Yes Is there any phase which is not gt connected PCB1 is normal Yes Reverse phase connection E
13. m Use the flare nut of the indoor unit attached insulation cord band or with tape 1 Field supplied ji j refrigerant piping NS A i L4 N ZA A i O z gt 7 l KAA IPM l I I I I Insulation attached to indoor unit l Brazing Field supplied insulation Make flares after attaching flare nut to the connecting pipe in the multi kit package 7 NOTE A system with no moisture or oil contamination will give maximum performance and lifecycle compared to a poorly prepared system Take particular care to ensure that all copper piping is clean and dry internally To ensure this blow oxygen free nitrogen through the pipes A CAUTION When inserting a pipe through any hole protect the end with a cap Do not put pipes on the ground directly without a cap or vinyl tape at the end of the pipe If the piping installation is not completed until the next day or even over a longer period of time braze off the ends of the piping and charge the pipe with oxygen free nitrogen through a Schrader valve type access fitting to prevent moisture and particle contamination entering Do not use insulation material that contents NH3 NH3 can damage the cooper pipe material and can be a source of future leakages Correct Incorrect EQ mm SMGB0049 rev 2 08 2010 19 Piping work considerations HITACHI Piping ins
14. Lower than set temp Outdoor Fan MOF Air flow 100 for 10 sec O U ON 7 ls Reverse phase Power to PCB in phase Alarm Code 05 O U ON correct Power to O U OFF Correct phase Only for indoor units m Auto louver 0 with auto louver Reset z Start of Transmission between Power to Power to PCB in gt O U I U and Remote Control L U ON 1 U ON GEE Switch Higher than Activation Level k Power to YH2 in L U OFF Power to AR in ON L U ON Lower than Activation Level for Unit with drain pump Setting at EM DRY DRY indication iss A Switch Increasing Set Temp B WV Switch Decreasing Set Temp Set Temp indicated i run LED ON RUN is idcated Pressing _ Power to YH2 for A Power to EHW ON RONG TOR 20 sec C Only for RPC units witc p Powerto Y211 0N gt C Rower TORVE ON B Power to YH2 ON 38 48HP Power to MC5 ON Power to Y52C5 ON Power to CH5 OFF A 30 48HP i Power to MC4 ON Power to Y52C4 ON EC Power to CH4 OFF b 18 48HP j Power to MC3 ON Power to Y52C3 ON gt C Power to CH3 OFF E 14 48HP Power to MC2 ON Power to Y52C2 ON EC Power to CH2 OFF Power to CH1 OFF in case t y m of comp heat temp is high Igher than es Set Temp Dry operation E heat Power to Power bs MC1 un ca load big Y52C1 ON etae ane te p c
15. 194 SMGBO0049 rev 2 08 2010 RAS 14 24FSN2 Cabinet and fan Spare parts HITACHI Service Manual Inspire the Next 8 5 RAS 14 24FSN2 Refrigerant cycle 195 SMGB0049 rev 2 08 2010 RAS 14 24FSN2 Refrigerant cycle Spare parts Service Manual HITACHI Inspire the Next 8 6 RAS 14 48FSN2 Electrical equipment U19 e Only for RAS 26 48FNS2 4 f S NA AS ANS a gs EY OSs S O KL CN V s 2 SMGB0049 rev 2 08 2010 196 RAS 14 24FSN2 Refrigerant cycle HITACHI Inspire the Next Spare parts Service Manual 8 7 RAS 14 48FSN2 Electrical equipment RAS 14 to 24FSN2 3 Only for e RAS 44 48FSN2 Only for FSN2 RAS 44 48 RAS 44 48FSN2 Only for 44 48FSN2 Only for RAS RAS 26 28FSN2 RAS 30 42FSN2 Only for 48FSN2 RAS 44 RAS 26 to 48FSN2 197 SMGB0049 rev 2 08 2010 RAS 14 48FSN2 Electrical equipment HITACHI Inspire the Next Spare parts Service Manual
16. A132 ZNS4 2 91 SvX HITACHI Inspire the Next IH Ko Gorg 4 2 HB Esos T jonGsp Guy Gy E i 3 zm E S ZKOG AGTT CSE alax areg SMGB0049 rev 2 08 2010 Electrical wiring diagrams 44 Electrical wiring HITACHI Inspire the Next Service Manual CO 9t 3VH 24 Ach Ge SHY CL LEE SuGg Ade eos 1204J r ae zaza GESIG x zan x b i F ASITX j E gt Nd f a ben E Z4 eee ee TH 7 EE E aa ZAR DAHI DEDE YAS tHSd tvAS Pd36 EAS PESAIL A xog 041609 v2t4 s8 g amp AII A323 1201 s Jed ULN JO UOT 2007 iuf JOoping fo xog 0110109 2011001 sapos jeac gija Kq uoo 1siu puswcings sus Bula plot cu IIF 910N
17. iiu Jooping Jo Xog 041005 9914199 4 jieq UON fo 10011800T sepoa peso yiia duo REN Iuel ibg pur Euialm per 5 Electrical wiring Service Manual 2H6S8 551v Z28 DREES N Electrical wiring diagrams SMGB0049 rev 2 08 2010 Electrical wiring Service Manual fTiD ZNS472 81 9 3 ry i n ig 1 CAST l AE Aug ZNSATU 8 SY 4818605 voy els 1U044 ied c E 3 4 ZOLL 8 i i d n Tun quy ur i a UH i EH Usa ae xo 1914841 304 pls 1U04j iium 100 0 xog 011005 9391119818 S UO ETESUT 3HTN IEN AUO ZKSAPZ 81 S8YM 9909 Ayye CNSare 81 Sye Teco Wi A 15 ijeudinbe is Be om uiage PISIJ 831 ZIY T Te33K
18. Front side Main B The interior of the electrical control box Main 9 7 9 99 7 9 fe z z s i es A Portion AT PCBI isi Middle i TS part of PM 4 d holder v PCB Ml i FANMI Ww fm mI P mm PCB Fixing Holder 10 A RAS 8FSN2 to RAS 12FSN2 220V 60Hz Front side Main The interior of the electrical control box Main s s 5 s 3 PCB1 Control PCB in outdoor unit PCB2 Inverter PCB IPM Transistor module FANM1 Fan module DM Diode module DCL Reactor TF1 Transformer NF1 Noise filter R1 2 RS 1 2 Resistor CB 1 2 3 Capacitor TB1 Terminal board for power source TB2 Terminal board for transmission CMC1 Magnetic contactor for inverter compressor EF1 2 Fuse for linverter compressor EF11 12 Fuse for fan module SMGB0049 rev 2 08 2010 244 Outdoor units FSN2 Mole HITACHI Service Manual Inspire the Next RAS 14FSN2 to RAS 24FSN2 380 415V 50Hz
19. No Item Indication Data Values Units 18 Evaporating temperature TE1 ad Ir in vo ae dir uitsd eC at heating bm t bm 127 Short circuited ic Evaporating temperature TE2 m r 46 80 oC at heatin 127 Open circuited for 14 to h P d L L L 127 Short circuited Evaporating temperature TE3 r r 46 80 20 at heating J E Zi gZ 127 Open circuited C for 26 to 48HP mE 127 Short circuited Evaporating temperature TE4 r r L 46 80 21 at heating J E l yl 127 Open circuited 9C for 44 to 48HP amm 127 Short circuited 22 Ambient temperature Ta j yc q 127 Open circuited C 127 Short circuited rr ege 23 Auto Charge temperature j l ri pt 127 Open circuited C m 127 Short circuited rlelr PEL I 24 Supercooling temperature or 127 Open circuited C zi bn t zi 127 Short circuited Estimated running current of rm a r1 z 25 compressor MC1 vt I E ra 000 255 A Estimated running current of ni 4 4 26 compressor MC2 mic m 000 255 A for 14 to 48HP a m Estimated running current of n 4 27 compressor MC3 ri x x 000 255 A for 18 to 48HP Estimated running current of n Li 4 28 compressor MC4 ri 000 255 A for 30 to 48HP Estimated running current of rni r 4 29 lcompressor MC5 ri lt 000 255 A for 38 to 48HP m IL onn Lt Z LL LUE al Indoor unit expansion valve
20. High pressure control Gas bypass valve check for protective control 4 5 S Q a gt 25 9 gt 5 2 2 05 0 2 5 5 0 Pressure MPa Output characteristics of high pressure sensor SMGBO0049 rev 2 08 2010 260 Pressure sensor Low pressure control A low pressure sensor detects the suction pressure during the cooling process The PID control with the operation capacity of the indoor units controls the compressor frequencies This way the suction pressure is controlled within an appropriate range If the suction pressure becomes excessively low the cooling action may be insufficient and the parts in the refrigerant cycle may be damaged Therefore if the output of the low pressure sensor indicates vacuum and the valve remains in the same position for 12 minutes or longer the compressor will stop in order to avoid damage Cooling process Ue sor l nun ad PID control for compressor frequencies with the operation capacity of the indoor unit Low pressure control Vacuum preventive control 4 5 S Q a o 25 E gt 5 2 So 05 0 3 0 1 9 1 0 2 0 Pressure MPa Output characteristics of low pressure sensor Main parts HITACHI Service Manual Inspire the Next 10 5 Scroll compressor 1 The rotating direction is definite 2 The pressure inside of the chamber is high pressure and the surface temperature of
21. RAS 30FSN2 to RAS 48FSN2 figure for RAS 48 FSN2 Accumulator ERR SMGBO0049 rev 2 08 2010 Outdoor units FSN2 233 HITACHI sie Inspire the Next Service Manual Before starting this work collect the refrigerant into a cylinder from the refrigerant cycle and turn OFF the power source of the unit Remove the front service panel according to the item Removing Front Service Panel 2 When removing the gas side stop valve cover the stop valve with wet cloth for cooling while brazing is removed When removing the liquid side stop valve remove the brazing at the stop valve and the brazing at the piping connected to the plate type heat exchanger as shown in the figure 3 Remove the screws fixing the plate as shown in the figure and pull out the stop valve with the plate together If the stop valve is mounted only at the liquid side the stop valve can be pulled out without removing the plate 4 Reassemble the stop valve in the reverse procedure for removing RAS 8FSN2 to RAS 12FSN2 Perform the brazing work while covering the stop valve with wet cloth for cooling The allowable temperature limit at the stop valve inside is 120 C Brazing removing portion After removing stop valve Stop valve gas side Stop valve Liquid Side Plate C Brazing removing portion Fixing screw for liquid si
22. Bi Night Shift Low noise Press PSW1 and select the setting condition 1 at the night shift low noise Then this function can be set The outdoor fan operation is controlled by fan controller as shown below The night shift operation shall be applied in case that the cooling capacity has the margin to be allowed for the capacity decrease and the low sound operation is required especially in the nighttime Outdoor Fan 10076 Maximum rotation 70 NE NM rotation ratio 50 22 25 30 33 Outdoor temperature C 7 NOTE The maximum rotation is always 100 rotation ratio for the standard unit No limitation of the outdoor temperature SMGB0049 rev 2 08 2010 Outdoor units Available optional functions Service Manual Bl Frequency range Cooling operation HITACHI Inspire the Next sd Minimum Maximum Pa Minimum Maximum Capacity Frequency Frequency Conditions Capacity Frequency Frequency Conditions HP Hz Hz HP Hz Hz 8 68 60 10 85 60 12 100 60 14 119 90 16 136 100 18 153 105 20 170 110 22 187 122 When 24 204 when 127 night shift 26 221 Except for the night shift 132 1 ni 1 is not set 28 15 238 HT is set 15 137 T ni 0 30 255 ni 1 175 32 272 187 34 2
23. PCB Indoor unit printed circuit board Is DSW10 1P No terminal resistance on gt Set it correctly PCB1 ON Is the voltage between faston No Is LED1 red on terminal R1 and Check the fuses of the PCB1 ON N1 of PCB1 220V outdoor unit power supply or 240V De Remove CN2 of Is connector PCB1 1 PCN1 CN1 for Yes the iransformer Plug PNC1 and CN1 correctly loosened z Is LED3 yellow Ye on PCB1 ON Is the fuse for Yes 9 PCB1 blown out gt Replace the fuse 3 2 No O No Is LED3 yellow d on PCB1 flickering No Faulty PCB1 more than once in gt 10 seconds Connect CN2 of PCB1 No S PCB setting non pole Set it correctly operating Yes To next page 418 SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next From previous page Is LED3 yellow ON even if CN2 of PCB is removed Is LED3 on PCB ON Faulty PCB gt Check other Indoor Units Is LED 3 yellow on PCB No Check the wiring between the flickering more than once in 10 gt outdoor unit and the indoor seconds units units or the fuse EF1 for PCB Yes Does refrigerant system setting between DSW1 RSW1 on PCB1 and DSW5 R
24. 1 The height of the foundation should be 100 to 300mm gt n A unk higher than the ground level Anchor bolt M12 Field supplied 2 Install a drainage around foundation for smooth drain Nut Field supplied 128 Washer Field supplied Vibration proof mat Field supplied Mortar hole 20100 x depth 150 Foundation Drainage P 17 5 17 5 Width 100 x depth 20 60 60 Attaching anchor bolt details View from P CORRECT INCORRECT Foundation 3 Install the outdoor unit in the front rear and right left direction horizontally Check to ensure that the gradient in four directions front rear right and left is within 10mm 4 Provide a strong and correct foundation so that a The outdoor unit is not on an incline b Abnormal sound does not occur c The outdoor unit will not fall down due to a strong wind or earthquake e side and e dtes pu S ae rear side Right side and left side SMGB0049 rev 2 08 2010 15 Outdoor units installation HITACHI Inspire the Next B Drain water treatement While heating or defrosting operation drain water is discharged Provide adequate drainage around the foundation If installing the unit on a roof or a veranda avoid draining in or over walkways to prevent water dripping on people or the formation of ice in winter In c
25. 3P Connector Outdoor unit PCB1 SS3 Forced stoppage switch 1 ERIS SS3 Power 21 CP H source 3 X1 X1 Control circuit Wiring diagram example of demand current control Table 5 1 Specifications of required main parts Parts Specifications Remarks Auxiliary Relay X1 X2 Mini Power Relay MY1F or 2F made by OMRON 220V 240V Changeover Switch SS2 SS3 Manual Switch 220V 240V T PCC 1A Five Cords with Connectors as One Connected to JST Connector XARP 3 Set Cord Low Volt 0 3mm Lower than 24V Inside of Unit 220 240V 0 5 to 0 75mm Cord Low Volt 0 5 to 0 75mm Lower than 24V Outside of Unit 220 240V 2mm NOTES 1 Make the wire to the terminals as short as possible 2 Do not run the wires along high voltage cable crossing is applicable If necessary to run wires along high voltage cable insert the low voltage cable s into metal tube and ground it at one end If sealed wires are used at the low voltage wire side ground it at one end of shield wires The maximum length should be 70m SMGB0049 rev 2 08 2010 Outdoor units Available optional functions H ITACHI Inspire the Next Service Manual The following signals can be picked up from the outdoor PCB Refer to the table corresponding at the required main parts Bl Output 1 Operating signal Control function No 1 Auxiliary relay contacting RYa is closed
26. Is the thermistor on top of compressor normal 1 No PCB1 Control PCB in Outdoor Unit i Yes Is the thermistor installed correctly on the compressor No Faulty thermistor Refer to Characteristics of thermistor see next page i Yes Is it at cooling or heating mode when the alarm has occurred Heating gt Install it correctly Cooling Cooling process gt M v Heating process Y discharge gas temperature unit PCB1 Check the high pressure and the compressor Calculate the superheat value in the outdoor Check the discharge pressure and the compressor discharge gas temperature Calculate the superheat value in the outdoor unit PCB1 l Is the superheat value under 10 C n4 gt Are the refrigerant piping and the electric wiring matching No gt Match the refrigerant piping and the electric wiring X s Is the connector on the No indoor unit PCB for the ex valve connected properly Plug the connector properly Yes l Is the superheat value under 10 C see position of the thermistor in the next page Yes Is the opening of the outdoor unit heat exchanger s expansion valve under 896 gt es Remove the sudden changes of load like short path of an out
27. B EF11 EF12 Rr fa z al a z i s LI Ue LI T3 i fi EFI DCL DCL zio ICMC1 dj RS E gx Les PCR2 FANMI CB i pr EF13 EF14 Front side Auxiliary f 1 CMC5 CMC4 CMC3 PCB1 Control PCB in outdoor unit PCB2 Inverter PCB IPM Transistor module FANM1 2 Fan module DM Diode module DCL Reactor TF1 Transformer NF1 2 3 Noise filter R1 2 RS 1 2 Resistor CA2 4 Capacitor for AC fan motor CB 1 2 3 4 Capacitor TB1 3 Terminal board for Power source TB2 Terminal board for transmission CMC1 Magnetic contactor for Inverter compressor CMC2 3 4 5 Magnetic contactor for constant speed CMOF Magnetic contactor for AC fan motor compressor EF1 2 Fuse for inverter compressor EF3 4 5 6 7 8 9 10 Fuse for constant speed compressor EF11 12 13 14 Fuse for fan module EF 15 16 Fuse for AC fan motor FFB2 3 4 5 Circuit breaker for constant speed compressor SMGB0049 rev 2 08 2010 247 Outdoor units FSN2 HITACHI Inspire the Next E Removing PCB2 for inverter After removing three 3 M3 screws remove the bushes and collars from PCB2 When reassembling the bushes and collars should be fixed correctly G NOTES 1 Do not touch any electrical components during LED201 red of PCB2 is ON If touched it may lead to electrical shock 2 Identify the terminal Nos with the mark band Nos when reassembling If incorrectly connected malfunction or damage will occur
28. Faulty Normal Check the transistor Check the PCB2 gt Replace i a module 1 2 module Good Abnormal Replace PCB2 and the transistor module Is the silicon grease coated all over between No the transistor module and the radiated fin gt Coat the silicon grease to all Is the fixed screw on the transistor module loose the touched face between the transistor module and the radiated fin fully Fix the Yes screw correctly 4 Is the heat exchanger Yes of outdoor unit clogged gt Remove clogging No Replace the PCB2 1 Regarding replacing or checking method for the inverter components refer to item Procedure of checking other main parts 2 Before the checking of inverter components refer to item Procedure of checking other main parts regarding electrical discharge 3 Turn ON the No 1 switch of the dip switch DSW1 on PCB2 when restarting with disconnecting the terminals of the compressor After troubleshooting turn OFF the No 1 switch of the dip switch DSW1 on PCB2 4 Use the silicon grease provided as accessory Service Parts No P22760 Position of Surge Absorber SA 380 415V When the unit is applied the excessive surge current due to ne Go 9 aa LIA ge lighting or other causes it is indicated this alarm code 04 or
29. Power supply cables o 000 Earth screw SEE C GC mRIR Connect the electrical cables between the indoor unit and the outdoor unit as shown in the wiring diagram Make sure that the terminals for the power supply wiring and the terminals for the intermediate wires between the indoor unit and the outdoor unit coincide correctly The terminals for the power supply wiring are L1 to L1 L2 to L2 L3 to L3 and N to N of each terminal board For the operating line the terminals for the intermediate wires are 1 and 2 to 1 and 2 of each terminal board for DC 5V Otherwise you may damage some components When you are installing the electrical wiring follow the local codes and the local regulations Connect the operation wiring to the units in the same refrigerant cycle You should connect the refrigerant piping and the control wiring to the same indoor units If you connect the refrigerant piping and the control wiring to the units in the different refrigerant cycle an abnormal operation may occur You must connect the shielded part to earth only in one cable side Do not use more than three cores for the operation wiring H LINK II Select the core sizes according to the national regulations If there are multiple outdoor units that are connected to one power supply wire open a hole near the connection ho
30. Cooling or Dry Operation Gas pipe surface temp of indoor heat exchanger Higher than 14 C After 15 minutes Liquid pipe surface temp of indoor heat exchanger Higher than 2 C SMGB0049 rev 2 08 2010 Standard control functions Lower than 14 C Lower than 2 C Control system Service Manual Electronic expansion valve control for supercooling circuit Cooling operation Td 2 100 C Yes Protection control for compressor frequency Fully opened of valve for plate exchanger Liquid injection No a gt Compressor frequency PID control Exp heat At starting up and I U smal capacity Yes PID control of Exp valve for operation plate heat exchanger Fully close of Exp valve for plate heat exchanger Fixed opening degree of electronic exp valve for liquid by pass NOTE Yes 1 Adecuate temperatura area for Td by Exp valve PID control SMGB0049 rev 2 08 2010 Temperature at top of compressor Td C 8 opening condition of the Exp valve of the plate heat exchanger is passed for 5 min and Td lt Tc 25 C pn 1296 opening condition of the Exp valve of the plate heat exchanger is passed for 5 min and Td gt 100 C No 110 Higher temp area 100 F Suitable
31. SMGBO0049 rev 2 08 2010 Outdoor units FSN2 231 HITACHI sie Inspire the Next Service Manual Bl Removing liquid tank RAS 8FSN2 to RAS 12FSN2 1 Loosen two 2 screws at the liquid tank rear side from the liquid tank right side with a Phillips screwdriver The back side of the liquid tank bottom plate are U shaped dent structure Only loosening the screws liquid tank is removed at the bottom back side NOTE Pay attention not to be injured with the plate edge or the heat exchanger fins Liquid Tank my 9 2 Remove two 2 screws fixing at the liquid tank front side 3 Pull out the liquid tank to front side and remove the screws at back side 4 Remove the liquid tank from the outdoor unit RAS 30FSN2 to RAS 48FSN2 figure for RAS 48 FSN2 SMGB0049 rev 2 08 2010 232 Outdoor units FSN2 Servicing HITACHI Service Manual Inspire the Next ll Removing accumulator RAS 8FSN2 to RAS 12FSN2 1 Remove four 4 screws fixing the accumulator 2 Hoist up the accumulator vertically from the outdoor unit by use of crane and so on Accumulator RAS 14FSN2 to RAS 28FSN2 EN ee Accumulator
32. Indi 2n z Contents ex Indication of unit No 1 cation o g Normal piei rant 1 Ab lit ircuit short circuit etc in circuit for COOL gta r1 normality open circuit short circuit etc in circuit for Indication of unit number x6 Lm AA TE Air inlet temp thermistor CHECK ni LUZ Discharge air temp thermistor After 7 seconds fi d Liquid pipe temp thermistor H H Remote thermistor abnormality m ao COOL HIGH l H 5 Gas pipe temp thermistor Operating automatic Hr PCB check Ac LUZ Remote sensor 8 CHECK 3 c HH Transmission of central station U roe After approx 5 seconds max 30 seconds in case LU EEPROM of a transmission failure between the indoor unit n p and the outdoor unit LUI Zero cross input failure Max three types of Abnormal operations indicated rr Transmission of indoor units during this TN checking operation Y nm HIGH RIS ae LH i Transmission of outdoor unit COOL H3 t2 E Abnormal operation 1 xe Hr Ld ITO input failure ugs FS PSH input failure re r moa After 1 second rao Protection signal detection circuit T Fr Phase detection B HIGH mf T mI COOL H 4 PR Transmission of inverter 5 Abnormal operation 2 EM cS gum 5 AC PA High pressure sensor 5 CHECK fe Fh Comp discharge gas temp thermistor After 1 second rr rL Low pressure sensor de Fd Heat exchan tion temp thermist COOL nn Ll r cdi eat exchanger evaporation temp thermistor Abnormal operation 3 NC Hd Fr Ambie
33. Service Manual HITACHI Inspire the Next Alarm code Description Abnormality of current transformer W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 n case that the abnormality of alarm code 51 or 54 occurs three times within 30 secons the alarm code of abnormality occurred for the thirs time is indicated Retry operation is performed up to second time of abnormality occurrence Condition of Activation When the frequency of the compressor is maintained at 15 18Hz after the compressor is started one of the absolute values of the running current at each phase U U V and V is less than 1 5A including 1 5A PCB1 Control PCB PCB2 Inverter PCB Restart the operation in Outdoor Unit Compressor stops immediately nearly 18Hz Faulty PCB2 Replace it 2 How is the compressor operation when restarted Compressor does not operate P17 is displayed on the 7 segment display on the Outdoor Unit PCB1 Replace the Compressor Is the coil resistance of the No comp normal Yes Is output of PCB2 correct 1 i o gt Is output of voltage between U V V W and W V normal
34. 15 SMGB0049 rev 2 08 2010 1 HITACHI Units installation Inspire the Next Service Manual 1 1 General installation notes A WARNING Install the outdoor unit with sufficient clearance around it for operation and maintenance as shown in the next pages Install the outdoor unit where good ventilation is available Do not install the outdoor unit where exists a high level of oil mist salty air or sulphurous atmosphere Install the outdoor unit as far as practical being at least 3 meters from electromagnetic wave radiator such as medical equipment Keep clearance between units of more than 50 mm and avoid obstacles that could hamper air intake when installing more than one unit together Install the outdoor unit in the shade or not exposed to direct sunshine or direct radiation from high temperature heat source Do not install the outdoor unit in a place where a seasonal wind directly blows into the outdoor fan For cleaning use non inflammable and nontoxic cleaning liquid Use of inflammable agent may cause explosion or fire Work with sufficient ventilation for working in an enclosed space could cause oxygen deficiency Toxic gas may be produced when cleaning agent is heated to high temperature by e g being exposed to fire Cleaning liquid shall be collected after cleaning Pay attention not to clamp cables when attaching the service cover to avoid electric shock or fire A CAUTION Check
35. 86 Contents 6 Testrun 6 1 Checking procedure before the test run 6 2 Testrun procedure from the outdoor unit side 6 3 Checklist 6 4 Judgement systems for refrigerant amount 89 6 4 1 Automatic judgement system for refrigerant amount 6 4 2 Simple judgement system for refrigerant amount 89 SMGB0049 rev 2 08 2010 Test run HITACHI Service Manual Inspire the Next 6 1 Checking procedure before the test run Test run should be performed according to the Table 6 2 And use the Table 6 1 for recording test run A WARNING E Do not operate the system until all the check points have been cleared A Check to ensure that the refrigerant piping and transmission between outdoor unit and indoor units are connected to the same refrigerant cycle If not it will cause an abnormal operation and a serious accident B Check to ensure that the electrical resistance is more than 1 megohm by measuring the resistance between ground and the terminal of the electrical parts If not do not operate the system until the electrical leakage is found and repaired C Check to ensure that the stop valves of the outdoor unit are fully opened and then start the system D Check to ensure that the switch on the main power source has been ON for more than 12 hours to warm the compressor oil by the oil heater E Check that the refrigerant piping and the electrical wiring conform to the same system and check that the d
36. Abnormal operation of the running current at the constant speed compressor EM DUK Pressure ratio decrease protection activating EM EUM Low pressure increase protection activating EUM Ln High pressure increase protection activating A lt Low pressure decrease protection activating A CAUTION You can check these alarms by means of the check mode 1 Follow the action that is indicated in each alarm chart You can clear these alarms only by turning OFF the main switch to the system However pay careful attention before starting because there is a possibility of causing serious damages to the compressors Alarm code Description h Incorrect indoor unit setting W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 35 is indicated in the disply of the remote control switch This alarm is indicated under the following conditions Turn OFF the power supply and check the setting of DSW and RSW Conditions More than 17 non FSN2 Series Indoor Unit H LINK are connected to one system Measurement Non FSN2 Series Indoor Unit H LINK should be 16 or less SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITA
37. Clogged check joint Replace the check joint No Abnormal operation of low pressure sensor Action Phenomenon Cause Check item Turn OFF Main Switch Fault Check that the output voltage is Replace the pressure sensor if correct faulty Faulty low pressure sensor Incorrect connection Check the connections Repair the wiring and the connections Faulty PCB1 Replace PCB1 and check the operation Replace PCB1 if faulty Indicated pressure value is excessively high or low Malfunction of the pressure sensor due to a faulty check joint Check the check joint for clogging Replace the check joint SMGB0049 rev 2 08 2010 141 Troubleshooting procedure H ITACH i Troubleshooting Inspire the Next Service Manual Alarm code Description EN Incorrect capacity setting or combined capacity between Indoor Units and l l Outdoor Unit W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is indicated when the capacity setting dip switch DSW2 on the outdoor unit PCB1 is not set all the settings from 1 to 6 are OFF or mis setting This alarm code is indicated when the total indoor unit capacity
38. Contents 3 Electrical wiring 3 1 General check HITACHI Inspire the Next 31 32 3 2 Electrical wiring for the outdoor unit 33 3 2 1 Electrical wiring connection for outdoor unit 33 3 2 2 Setting the DIP switches for the outdoor unit 34 3 3 Common wiring 38 3 3 1 Electrical wiring between the indoor unit and the outdoor unit 38 3 4 Wire size 40 3 5 Electrical wiring diagrams 42 SMGB0049 rev 2 08 2010 31 Electrical wiring HITACHI Inspire the Next Service Manual 3 1 General check A DANGER Before installing the electrical wiring or before performing a periodical check turn OFF the main switch to the indoor unit and the outdoor unit For safety reasons be sure that the indoor fan and the outdoor fan have stopped Prevent the wires from touching the refrigerant pipes the plate or cutting edges and the electrical components inside the unit to prevent them getting damaged In worst cases a fire may occur Tightly secure the wires with the cord clamp inside the indoor unit 7 NOTE In case of performing a test run operation take especially care because some security features are disabled the units will operate during 2 hours without Thermo OFF and the 3 minute guard for compressor protection will not be effective during the test Fix rubber bushes with an adhesive on the panel when the conduit pipes
39. Inspire the Next Control subject Cooling process Heating process Defrost operation Purpose Contents Purpose Contents Contents Solenoid valve equalized pressure SVA 1 For equalizing the pressure of the inverter compressor during the stop In case of stopping inverter comp after operation For controlling inner pressure of stopagge comp In case of stopping inverter comp after operation Solenoide valve for gas bypass SVB Discharge gas temp Td keeping 2 Discharge pre Pd protection Turn ON in comp operation 2 ON Pd gt 3 6 MPa Discharge gas temp Td keeping 2 Discharge pre Pd protection 1 Turn ON in comp operation 2 ON Pd gt 3 6 MPa Solenoide valve for liquid bypass SVC Diacharge pre Pd decrease control ON at start up operation ON Pd lt 2 3 MPa Solenoid valve for the oil return SVF For controlling temp oil circulation volume from the oil separator to each compressor 1 Turn ON in comp operation 2 Turn OFF in comp stoppage For controlling temp oil circulation volume from the oil separator to each compressor 1 Turn ON in comp operation 2 Turn OFF in comp stoppage Same as cooling heating operation Solenoid valve for shut off from high and low pressure at refrigerant collection SVG For refrigerant collection 1 Turn ON in Comp
40. Production date Checker No Check item Check method Result Remarks 1 Are discharge gas thermistors THM8 THM9 THM12 THM13 and THM168 correctly connected 1 Are the wires of each thermistor correctly connected in a visual inspection 2 Make sure that 7 segment display of Td1 is higher than Td2 to Td5 when No 1 comp is operating Td1 Temp of THM8 Td4 Temp of THM13 Td2 Temp of THM9 Td5 Temp of THM18 Td3 Temp of THM12 2 Are the thermistors THM8 THMS9 THM12 THM13 and THM18 disconnected 1 Make sure that themistor on the top of comp is correctly mounted in a visual inspection 2 Make sure that the actually measured temp is greatly different from the display Td1 Td5 during the check mode 3 Are the connectors for current sensor correctly connected 4 Is current sensor faulty Is current sensing part on PCB2 faulty 1 Make sure that indications A1 A5 are 0 during the compressor stoppage 2 Make sure that indications A1 A5 are not 0 during the compressor operation However A2 A5 are 0 during the stoppage of the comp No 2 3 4 and 5 6 Is the direction of current sensor CTU CTV reversed Check the direction in a visual inspection 7 Are the power supply wires U and V inserted correctly into the current sensor Make sure that the wires are correctly inserted 8 Are the ex valves MV1 MV2 MV3 and MVB correctly connected
41. Recharge the refrigerant after the vacuum pumping Clogging of the discharge piping Check for clogging Remove the clogging Liquid line stop valve or gas line stop valve is not in operation Check the stop valves Fully Open the stop valves Clogging of the check valve Check for clogging Replace the check valve SMGB0049 rev 2 08 2010 117 Troubleshooting procedure H ITACH i Troubleshooting Inspire the Next Service Manual Alarm code Description i H 4 Abnormal transmission between the indoor units and the outdoor unit W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm is displayed when an abnormal operation is maintained for three minutes after the normal transmission between the indoor units and the outdoor unit Also an abnormal operation is maintained for 30 seconds after the micro computer is automatically reset The alarm is displayed when the abnormal transmission is maintained for 30 seconds from the starting of the outdoor unit Investigate the cause of the overcurrent and take the necessary action when the fuses are blown out or the breaker for the outdoor unit is activated PCB1 Outdoor unit printed circuit board
42. Replace AC chopper for indoor unit fan and fuse Failure of the transformer at the indoor unit side Measure the voltage at the Replace the transformer secondary side Disconnected cable of the remote control switch Replace the cable or repair the Connect the cable cable Insufficient connection or incorrect connection of the indoor Insufficient contacting at the unit POB connectors of the remote control Insufficient connection switch or incorrect connection of the indoor unit PCB in the remote control switch Check the connectors Correctly connect the connector Failure of the remote control switch Check the remote control switch by means of the self check mode 1 Replace the remote control Switch if it failed Unconnected wires to PCB Check the connectors Correctly connect the wires Failure of PCB Failure of PCB Check PCB by means of the self check mode 2 Replace PCB if it failed Incorrect wiring connection Take action according to the procedure that is displayed in TEST RUN y 2 Refer to section Self checking of remote control switch 100 Initial troubleshooting Refer to section Self checking of PCB using remote control switch SMGB0049 rev 2 08 2010 Troubleshooting Service Manual E RUN LED on the remote control switch Flickering every 2 seconds HITACHI Inspire the Next Phenomenon Cause
43. Replace if AC chpper is failed No defrost operation mode is available during the heating process or the defrost operation continues Failure of thermistor Failure of thermistor for ul outdoor evaporating temp during heating Disconnected wire of thermistor Replace or correctly connect when it is abnormal Disconnected 4 way valve coil Failure of Measure the resistance of coil 4 way valve ft Incorrect activation of 4 way valve Enforced power supply Replace the 4 way valve Disconnected control wires between indoor unit CH unit and outdoor unit Check the connectors Correctly connect the wiring Disconnected wiring to PCB Failure of the outdoor units of PCB Failure of PCB Check the connectors Check PCB by means of the self check mode 1 Correctly connect the wiring Replace PCB when the check mode is not available Disconnected wiring to Failure of the Indoor Unit POB Check the connectors Correctly connect the wiring of PCB Failure of PCB The LED and the LCD on the remote control switch remain ON Failure of PCB in the indoor unit or the remote control switch Check PCB by means of the self check mode 1 Replace if PCB fails 1 Refer to section Self checking of PCB using remote control switch 2 Refer to section Troubleshooting in check mode by remote control switch 104 SMGB0049 rev 2 08 2010
44. TIE Current A J im l er Returns to Temperature indication The total current is displayed when several compressors are running In case of the inverter compressor the running current of the primary side of the inverter is displayed SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting HITACHI Service Manual Inspire the Next E Contents of the Check mode 2 When more than three indoor units are connected to one remote control switch the latest data of only the first three indoor units that are connected serially are displayed If you press the part of the TEMP switch the next display appears If you press the part amp of the TEMP switch the previous display appears Indication of the category code NETUS Indication of the temperature etc Temperature indication 1 Indoor unit air inlet temp I t m at thermistor C Lo Namal Temperature displayed l Indoor unit discharge air FF m rr 2 o amm Thermistor is open circuited temp at thermistor C UL l l Abormal H orPCB is defective l or Indoor unit heat exchanger r IT 3 Temp for top of comp 3 liquid pipe temp freeze Zt I Lr wot protection C l pura Thermistor is short circuited FF o
45. e e 5 pr z E o S eod 5 fal s E z 3 z B EL LE Z D ae aE g S E amp t ii m E e fa P f x Merk ans 46 SMGB0049 rev 2 08 2010 Electrical wiring diagrams Control system Service Manual 4 Control system This chapter presents the control system flowcharts for the Set FREE FSN2 Outdoor Units series Contents 4 Control system 4 1 Device control system HITACHI Inspire the Next 47 48 4 1 1 RAS 8 48FSN2 refrigerant cycle control 48 4 2 Outdoor Units PCB 51 4 2 1 RAS 8 48FSN2 51 4 3 Protection and safety control 52 4 4 Standard operation sequence 53 4 4 1 Cooling process 53 4 4 2 Dry operation 55 4 4 3 Heating process 57 4 4 4 Defrost operation control 59 4 5 Standard control functions 60 4 5 1 Freezing protection during cooling process or dry operation 60 4 5 2 Protection control in cooling and dry operation 61 4 5 3 Compressor operation control 62 4 5 4 Outdoor fan control during cooling operation 64 4 6 Restricted control for Outdoor Units 65 SMGB0049 rev 2 08 2010 47 HITACHI Inspire the Next 4 1 Device control system Contr
46. 3 Check to ensure that the electrical wires will not be caught between the mounting electrical components and the mounting plates when the PCB2 is remounted Middle part of holder NC Bush PCB2 Screw M3 N QM v p P rd SMGB0049 rev 2 08 2010 248 Outdoor units FSN2 Servicing Service Manual A WARNING Do not touch any electrical part while LED 201 Red on PCB2 in ON If touched electrical shock will occur Collar Transistor module Servicing Service Manual E Removing diode module and transistor module Before this work remove the service panel according to the item Removing Front Service Panel Check to ensure that LED201 Red of the PCB2 is OFF 1 Disconnect all the wirings connected to the diode module as shown below a Disconnect the wirings of terminal U V W on the diode module b Remove two 2 fixing screws on the diode module c Remove the diode module from the electrical box 2 Disconnect all the wirings connected to the transistor module as shown below a Disconnect the wirings of connector CN2 CN206 and CN207 b Disconnect the wirings of P N U V W on the transistor module c Remove the three 3 screws for the PCB2 and then remove the PCB2 from the transistor module d Remove four 4 fixing screws on the transistor module e Remove the transistor module from the electrical box G NOTES 1 HITACHI Inspire the Next When mounting PC
47. 45 device High Pressure Increase Protection Activating EEE Operation Clogging Short Pass Pipe Clogging Insufficient Refrigerant Inert Gas Mixing 47 Low Pressure Decrease Protection Activating Insufficient refrigerant Refrigerant Piping Clogging Vacuum Operation Locking Loose connector 48 Activation of inverter overcurrent protection device Overload operation compressor failure 51 Sensor Abnormal Current Sensor Current sensor failure Driver IC Error Signal Detection Protection for Inverter Error Signal Detection Overcurrent Low Voltage Short Circuit Inverter Abnormal Inverter Fin Thermistor Abnormal Outdoor 54 Increase in Inverter Fin Temperature Fan Heat exchanger clogging 55 Inverter failure Inverter PCB failure Abnormal of fan motor position detection circuit m disconnected wiring 56 Outdoor fan Abnormal detection of fan motor position No 1 Fan controller failure F1 56 No 2 Fan controller failure F2 56 Driver IC error signal detection fin temp increase 57 Activation of fan controller protection No 1 Fan controller failure F1 57 No 2 Fan controller failure F2 57 Fan controller Abnormal operating speed 58 Abnormal fan controller No 1 Fan controller failure F1 58 No 2 Fan controller failure F2 58 EE Inverter Compressor Protection 3 Time Occurrence of Alarm Giving Damage to Compressor within 6 hours Outddor b1 unit number Incorrect outdoor unit number setting Over 64 No is set for address
48. 96 UL l ml l Estimated electric current indication 15 Compressor running mr 2 rrr current A U LL Returns to temperature indication SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual This indicates the internal information for the remote control switch This does not have any specific meaning This is an indication for frequency of inverter The total value is indicated when two compressors are running Troubleshooting H ITACHI Service Manual Inspire the Next E Simple checking by 7 segment display During auto addressing the following items can be checked using the outdoor unit s on board 7 segment LED display 1 Disconnection of power supply to the indoor unit 2 Reverse connection of the operating line between the outdoor and indoor units 3 Duplication of indoor unit number 1 Turn ON all Indoor Inits connected to the Outdoor Unit Turn ON the Outdoor Unit Auto addressing starts Outdoor Unit Circuit Board PCB1 E Checking method by 7 segment display Operating conditions and each part of refrigeration cycle can be checked by 7 segment display and push switches PSW on the PCB1 in the Outdoor Unit During checking data do not touch the electric parts except for the indicated switches because 220 240V is applied to them Pay attention not to contact the tools with electrical parts If contacted electrical parts wi
49. Abnormal operation of the devices Cont HITACHI Inspire the Next Phenomenon Insufficient heating process pressure Indoor heat load is greater than the heating Excessively low suction Cause capacity Gas leakage or insufficient refrigerant charge Excessively small diameter or long piping Failure or malfunction of the expansion valve Clogging of I U O U CH Unit strainer Check item Calculate the heat load Measure superheat Measure the field supplied piping Check for clogging Check the connection cord and the connector Is there an operation sound from the coil Is the thermistor on the compressor normal Is the thermistor installed correctly on compressor Check the temp difference between the inlet and the outlet of strainer Action Turn OFF the main switch Replace the unit with a bigger unit Correctly charge the refrigerant after the gas leakage check and repairing Use the specified pipes Remove the clogging Replace the connector Replace the coil Replace the thermistor Correctly install the thermistor Replace the strainer for the outdoor unit or the indoor unit Clogging of suction piping Insufficient air flow through the outdoor unit Check the temp difference of each part Is the outdoor unit heat exchanger clogged Are there any obstacles at the inlet or the outlet of outdoor unit Remove the clogging Remove the cl
50. Check PCB2 or the transistor module Yes Replace PCB2 2 1 Perform the high voltage discharge work by referring to the item Procedure of checking other main parts before checking and replacing the inverter parts SMGB0049 rev 2 08 2010 153 Troubleshooting procedure Troubleshooting HITACHI Inspire the Next Service Manual Alarm code Description 4 Inverter error signal detection W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB IPM Transistor Module have detecting function of abnormality This alarm is indicated when the transistor module detect the abnormality 7 times in 30 minutes including 7 Retry operation is performed up to the occurrence of 6 times Conditions Abnormal current to the transistor module such as short circuited or grounded or Abnormal temperature of the transistor module or Control voltage decrease PCB1 Control PCB in Outdoor Unit PCB2 Inverter PCB Turn off power disconnect U V W from compressor terminals and restart Does the protecting function activate 3 Yes No Check the compressor If there is a short circuit between phase lines replace the compressor
51. Is the running current indicated Is the connector CN4 6 CN22 No No on the 7 Segment Display of of current transformer correctly Connect it correctly PCB1 at the check mode connected Yes Yes Check the constant speed compressor and the current transformer it Remove the cause after checking Indication on the display of the outdoor unit PCB1 Abnormality of constant compressor Z i H mc2 34 mcs Hid H mca z d mcs Model Thhermistor No Connector No CT2 CT3 CT4 CT5 CN4 CN5 CN6 CN22 RAS 14 and 16FSN2 O B B RAS 18 28FSN2 O O RAS 30 36FSN2 O O Oo z RAS 38 48FSN2 O O O Oo CT Current Transformer SMGB0049 rev 2 08 2010 Troubleshooting procedure 145 HITACHI Inspire the Next Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF Main Switch Overcurrent of the compressor motor Excessively large running current of the compressor motor Single phase operation Excessively high voltage or low voltage of the power source Operate within 380V 10 50Hz or 415V 10 50Hz Imbalance among phases at the power source Adjust the voltage between each phase Excessively high discharge pressure Blown out fuse for the power source Check for causes Replace the fuses Looseness of the screws for the powe
52. Outdoor units FSN2 TB2 S n e TB5 V es U e020 CN203 White Servicing Service Manual o NOTE Do not apply great force when removing the fan module or the brazing will be fallen apart and a malfunction of the fan module may occur 2 Identify the terminal Nos with the mark band Nos when reassembling If incorrectly connected malfunction or damage will occur 3 Check to ensure that the electrical wires will not be caught between the mounting electrical components and the mounting plates when the PCB3 is remounted 4 Apply silicon grease evenly on the whole rear side of the fan module when mounting Silicon grease is available as a field supplied accessory TB1 R i TB7 P Screw M4 CN202 Red Main parts Service Manual 1 0 Main parts Contents 10 Main parts 10 1 Inverter HITACHI Inspire the Next 251 252 10 1 1 Specifications of inverter 252 10 1 2 Inverter time chart 254 10 1 3 Protective Function 255 10 1 4 Overload Control 256 10 2 Thermistor 257 10 2 1 Position of thermistor 257 10 2 2 Resistance value of the thermistor 257 10 3 Electronic expansion valve 259 10 3 1 Electronic expansion valve for the outdoor unit 259 10 4 Pressure sensor 260 10 5 Scroll compressor 261 10 5 1 Reliable mechanism for low vibrating and low sound 261 10 5 2
53. PCB1 is normal Correctly connect each phase of the power source Yes Is there any excessive voltage Abnormal operation with the decrease at the power source power source PCB1 is normal No Faulty PCB1 or other cause gt see below Voltage for unit to be suspended Running voltage 342 456 V gt Setting voltage Less than 323 V Action Phenomenon Cause Check item Turn OFF the main switch Activation of reverse phase sensor in the outdoor unit Check it according to the Reverse or single phase Af electrical wiring Replacing wires repair tightening screws or correct wiring Faulty outdoor unit PCB1 SMGB0049 rev 2 08 2010 122 Troubleshooting procedure Replace PCB1 if faulty Troubleshooting HI ITACHI Service Manual Inspire the Next Alarm code Description LUCI W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The alarm code is displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the voltage between terminal P and N of transistor module IPM is insufficient and the alarm has three occurrences in 30 minutes In the case that the occurrence is smaller than two times retry is performed Excessively low or high voltage
54. Retry due to pressure ratio decrease Retry due to low pressure increase Retry due to high pressure increase Retry due to abnormal current of constant speed compressor HP gt 12 Retry due to abnormal high temperature of discharge gas excessive low suction pres sure 5 Retry due to decrease of discharge gas superheat Retry due to inverter tripping H Retry due to voltage decrease H Expansion valve opening change protection H Operation mode changeover of indoor unit Note 5 NOTE 1 Explanation of Terms Thermo ON A condition where an indoor unit is requesting the compressor to operate Thermo OFF A condition where an indoor unit is not requesting the compressor to operate 2 Even if stoppage is caused by Alarm 02 is not always displayed 3 If the transmission between the inverter printed circuit board and the control printed circuit board is not performed during 30 seconds the stoppage cause is d1 05 and the alarm code 04 may be displayed If the transmission between the indoor unit and the outdoor unit is not performed during three minutes the Indoor Units are stopped In this case the stoppage cause is d1 06 and the alarm code 03 may be displayed rm 5 In the system 20 will be indicated at the diference between 16 failure occurrence EE im indoor units counter in indoor unit T I Countable up to 99 Over 99 times 99 is always displayed NOTE 14 Cause of
55. Service Manual HITACHI Inspire the Next 18 Perform the final check for wiring conditions referring to the drawing below NOTE Check that all wires do not contact with the compressor piping or plate edges If it contacts wire breakage or fire may be occurred Tack Remove Td thermistor and PSH from dent part of waterproof cover right side Slacken thermistor wiring and PSH lead wire about 10 mm to prevent compressor and piping from contacting Td thermistor Cover top cap firmly to protect compressor from entering water Wind all bind lace at tack more than 4 times PSH high pressure switch Wind oil heater below cap only for constant speed compressor Leo Waterproof cover Details view from W Pull out power line for constant speed comp and oil heater lead line from upper side of bin lace Oil heater lead line Power line for constant speed control only for constant speed comp Oil heater only for inverter comp oil heater position keep distance approx 20 mm as shown in figure Oil heater lead line Power line for inverter comp Oil heater wind oil heater on bottom cap as shown in figure Remove power line and oil heater lead line from dent part of waterproof cover Do NOT contact wiring with piping Fix power line for compressor and oil heater lead line together w
56. aluminium sheet may be damaged when removing waterproof cover Thermistor holder Holder Top cap Thermistor Holder for Td fixing plate thermistor Bind lace Tack Waterproof cover SMGB0049 rev 2 08 2010 208 Outdoor units FSN2 Servicing Service Manual 4 Release the bind lace of the waterproof cover for removing or NOTES When removing the waterproof cover pay attention not to deform the piping around the cover The brazing part may be damaged due to pipe deformation 2 When removing the compressor pay attention not to be injured with the sheet metal edge or the heat exchanger fins 3 The aluminium sheet is conductive If the aluminium sheet is damaged it may lead to the failure due to electrical HITACHI Inspire the Next wiring contact To avoid such a failure check the waterproof cover conditions when fixing Direction to remove the cover Waterproof cover Inverter Compressor E656DHD 5 Remove the terminal cover for the compressor and disconnect the wiring to the compressor terminals Match the terminal Nos with the mark band Nos when reassembling If the wiring is connected incorrectly the compressor may be damaged due to reverse rotation NOTES When replacing the compressor check for the ring terminal condition If the ring terminal is damaged or something wrong with it replace it with new one Fix the lead wi
57. gt 500 900 HZ 2 ud 2 500 900 M2 2 2 h2 Front side wall height 500 mm Rear to rear installation case 3 No limit to wall height pes gt 900 gt s 2 500 900 I2 2 A space of 900 mm is recommended for easier service work gt 500 900 2 2 S 250 h I 1500 OC gt 500 900 2 E N H Qs Io 2 h2 Front side wall height 500 mm 42 SMGB0049 rev 2 08 2010 Outdoor units installation Units installation HITACHI Service Manual Inspire the Next c G wore c In case that the rear space is less than 1600 mm and the py side space is less than 400 mm apply a field supplied fence for each unit A a 2 Other models Model Number of cabinets O RAS 8 12FSN2 1 NOIE For other models the service space is the same as RAS 14 24FSN2 2 for 1 cabinet See the table for the number of cabinets RAS 26 42FSN2 3 according to the Outdoor Unit model 4 RAS 44 48FSN2 SMGB0049 rev 2 08 2010 13 Outdoor units installation Units installation HITACHI Inspire the Next Service Manual E Consideration to Seasonal Wind Avoid the installation
58. make sure that the stop valves are closed completely 2 Connect the indoor unit and the outdoor unit with field supplied refrigerant piping Suspend the refrigerant piping at specified points and prevent the refrigerant piping from touching weak parts of the building such as wall ceiling etc Abnormal sound may occur due to the vibration of the piping Pay special attention in case of short piping length 3 Connect the gauge manifold using charging hoses with a vacuum pump or a nitrogen cylinder to the check joints of the liquid line and the gas line stop valves Perform the air tight test Connect a manifold gauge to the check joints of the liquid and gas stop valves in the outdoor unit Do not open the stop valves Apply nitrogen gas pressure of 4 15 MPa 4 Check for any gas leakage at the flare nut connections or brazed parts by gas leakage tester or by use of a foaming agent 5 Connect a manifold gauge to the check joints at the both sides Continue vacuum pumping work until the pressure reaches 756mmHg or lower for one to two hours After vacuum pumping work stop the manifold valve s valve stop the vacuum pump and leave it for one hour Check to ensure that the pressure in the manifold gauge does not increase Outdoor unit Stop valve gas line 1 Stop valve liquid line Manifold gauge o dE o Nitrogen tank for air tight test amp nitrogen blow during brazing 9 J 1 Refrigerant tank R41
59. operated In this case check to ensure the surge absorber SA e EJ EJ o on the noise filter NF1 If the inside of the surge absorber is 2 E r A 2 normal turn OFF the power once and wait for PCB2 s LED OFF E and turn ON again i Se 3 no a oA a SMGB0049 rev 2 08 2010 156 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description rr rmn rn l l UL zd UC Abnormal operation of DC fan motor protection W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm is indicated when the revolution pulse output from the fan motor is 10 rpm or less and the reverse revolution signal is detected The fan motor is stopped once and restarted after 10 seconds If it occurs more than 10 times in 30 minutes this alarm is indicated The abnormality occurs when the fan motor is stopped Restart operation Yes lt Does the DC motor run gt No Alarm code is not indicated Does the fan stop by the foreign This alarm is indicated due to detected overcurrent by the contrary wind This is normal matter Check to remove the connector CN14 on PCB1 and CN206
60. you can press the switches COOL N LLL al a 2 TEMP MODE DRY ABNLI ET A 7 vs 2 3 1 LN nni Jj ifi C HEAT 3 The LCD changes as shown in the RE em right figure __ 3 1 After the LCD changes as shown in tow gt Be ae the right figure the RUN indicator S02 UNCTON flickers twice HSTRG 4 m FAN ms pe pe ur 1 LUC AUTO VENTI LL LRUNJCHECK HEAT LOW kam foot a DRY A C SERVICE AUTO SIR BE mN The LCD changes as shown below Press all the switches 13 switches one by one Every time you press the switch the number of the indication of the part A in the figure below increases one 5 NOTE ONN 1 Unless all the switches are pressed the checking does not Bn 3 proceed to the next item Hr 2 You can press the switches in any order 3 Pressing two or more switches simultaneously is invalid and not counted The LCD changes as shown below The remote control switch 5 7 NOTE automatically starts to check the 1 In case that the transmission circuit is abnormal the LCD transmission circuit remains as shown in the left figure and the checking does 6 not proceed to the next item Troubleshooting Service Manual The LCD indication changes as shown below The detected temperature of the remote control thermostat is displayed at the A part in the figure below coe Li Li amn The LCD changes as shown below ry d Ln The LCD ch
61. 10 minutes continuously Over 140 C 5 seconds continuously Heating Over 132 C 10 minutes continuously Over 140 C 5 seconds continuously Defrosting Over 132 C 5 seonds continuously Bl Thermistor for the outdoor temperature THM7 The thermistor resistance characteristics are shown in the figure below E Thermistor for Evaporating Temperature of Outdoor Unit in Heating Operation For Defrosting The characteristics for the thermistor is the same with the value of outdoor ambient temperature thermistor as shown in the figure below E Thermistor for Super Cooling Bypass and Main Line Temperature of Outdoor Unit The characteristics for the thermistor is the same with the value of outdoor ambient temperature thermistor as shown in the figure below Thermistor Characteristics 80 70 60 Thermistor 50 Resistance 46 KQ x 35 30 77 30 61 20 5 16 425 3 6 25 1 5 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Ambient Temperature C SMGB0049 rev 2 08 2010 258 Thermistor Main parts Service Manual HITACHI Inspire the Next 10 3 Electronic expansion valve Micro computer Pulse signal Pulse motor 2 Phase permanent magnetic pulse motor Control 0 to 500 pulse by 1 pulse Precise control Refrigerant flow control Needle Items Specificat
62. 100 100 RAS 44FSN2 79 100 4 100 100 RAS 46FSN2 84 100 4 125 100 RAS 48FSN2 89 100 4 125 100 ELB Earthleakage Breaker CB Circuit Breaker SMGB0049 rev 2 08 2010 Wire size 41 H ITACH i Electrical wiring Inspire the Next Service Manual 3 5 Electrical wiring diagrams This sub chapter shows the Electrical Wiring Diagram for each unit of the new Hitachi Set Free FSN2 Unit model Page Electrical wiring diagram for models RAS 8 12FSN2 43 Electrical wiring diagram for models RAS 14 24FSN2 44 Electrical wiring diagram for models RAS 26 42FSN2 45 Electrical wiring diagram for models RAS 44 48FSN2 46 SMGB0049 rev 2 08 2010 Electrical wiring diagrams Inspire the Next HITACHI J EEEE I ee f tU 230 P 0 Hob ig EM c THU cmm l HL zed men I n L3 C3 i3 t3 a Fl EE 2 4 Tene Gag LK ii ag Le ST d i ate 2 LL J 192 1 LL is 7 a HD 30 82 C a s le c Nene ee ls s of Non so J xog 241009 72011138 SQ JO Woes Tay ayy apice 13944 ZR
63. 2010 Outdoor units FSN2 211 HITACHI Inspire the Next 10 Remove the nuts fixing the compressor and remove the compressor Inverter Compressor three 3 nuts Constant Speed Compressor four 4 nuts NOTES 1 When removing the compressor pay attention not to contact with surrounding pipes If contacted pipe may deform 2 Pay attention not to be injured with the sheet metal edge while working 3 When removing the compressor fixed with oil discharge pipe seal the pipe ends with tapes to avoid remaining refrigerant oil spill 4 Do not expose the refrigerant cycle to the environment for a long period in order to avoid mixing the water with foreign particles After removing the compressor mount the new one quickly E In case of RAS 14FSN2 to RAS 48FSN2 Special washers silver painted are fixed with compressor for vibration absorption Never remove these special washers Special washers are fixed with special nuts SMGB0049 rev 2 08 2010 212 Outdoor units FSN2 Servicing Service Manual Nut fixing position only for constant speed compressor Nut fixing position 8 doc f j Nut fixing position Discharge pipe Suction pipe Nut fixing position Oil discharge pipe Front side Special washer silver painted Foot of compressor Special nut Vibration proof rubber Mole HITACHI Service Manual Inspire the Next 11 Take out the remaining refrigera
64. 3 Abnormal transmission between the remote control switch and the indoor unit 101 7 1 4 Abnormal operation of the devices 102 7 2 Troubleshooting procedure 110 7 2 1 Alarm code indication of remote control switch 110 7 2 2 Troubleshooting by alarm code 114 7 2 3 Troubleshooting in check mode 159 7 2 4 Troubleshooting by means of the 7 segment display 165 7 2 5 Running current of the compressor 171 7 2 6 Protection control code on the 7 segment display 173 7 2 7 Activating condition of the protection control code 174 7 3 Procedure for checking each main part 176 7 3 1 Self checking procedure of PCB by means of the Remote Control Switch 176 7 3 2 Self Checking procedure of the Remote Control Switch 178 7 3 3 Self Checking procedure of the Indoor Unit PCB only for RPK 180 7 3 4 Procedure of checking other main parts 181 SMGB0049 rev 2 08 2010 Troubleshooting H ITACHI Service Manual Inspire the Next 7 1 Initial troubleshooting E Simple checking procedure by means of the 7 segment display 1 Turn on all the indoor units which are connected to the outdoor unit 2 Turn on the outdoor unit 3 Auto addressing starts Outdoor unit printed circuit board PCB 1 During the auto addressing you can check the following items by means of the 7 segment display of the outdoor unit Disconnection of the power supply to the Indoor Unit Duplication of the Indoor Unit number See alarm code 35 Normal case The 7 segm
65. 36 48FSN2 Gas 4 135 34 116 38 1 41 3 7 NOTE For connecting the lower piping diameter for the Outdoor Units having two piping dimensions cut off the end part of pipe flange factory supplied which is for connecting the higher piping diameter If it is necessary use the reducer SMGB0049 rev 2 08 2010 26 Outdoor units piping installation Piping installation HITACHI Service Manual Inspire the Next Confirm that the valve is closed Prepare a field supplied bend pipe for liquid line Connect it to the liquid valve by flare nut through the square hole of bottom base For gas piping connection RAS 10 48HP Prepare a field supplied bend pipe for gas line Solder it and the factory supplied pipe flange at the outside of the unit 2 o Factory supplied pipe flange 9 2 Solder by bottom side up a ad e Field supplied bend pipe e im Remove the flange and the gasket attached to the unit before shipping and attach the new gasket factory supplied before connecting the pipe flange to the gas valve RAS 8 48HP Gas valve Nuts only for 8 12HP Gasket Pipe flange 4 holes for 26 48HP Bolts 4 bolts for 26 48HP 000000 Remove Solder the bend pipes and field piping SMGB0049 rev 2 08 2010 27 Outdoor units piping installation HITACHI Piping installation Inspire the Next Service Manual 1 The stop valve has been closed before shipment however
66. 47 Ps or 08 Discharge gas are displayed SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Code Protection control Activating condition Remarks x a gt v Discharge gas SUPERHEAT decrease retry i ri Discharge gas SUPERHEAT less than ten 10 degrees is maintained for 30 minutes When it activates three times in two hours the alarm code 07 is displayed x F1 Inverter trip retry Automatic stoppage of transistor module activation of electronic thermal or abnormal current sensor When activating three times in 30 minutes 48 51 and 53 alarm is indicated Fan motor controller trip retry 4 m Automatic stoppage of fan controller Electronic thermal activation or Micro computer reset Li Vi Insufficient voltage excessive voltage retry ri Insufficient excessive voltage at the inverter circuit or CB connector part When it activates three times in 30 minutes the alarm code 06 is displayed Pe nu High pressure decrease retry gt rn Pd lt 1 00MPa for 1 hour No alarm x 4 AC fan motor protection device retry i ni z Activation of internal thermostat of outdoor AC fan motor When it activates three times in 30 minutes the alarm code 09 is displayed Ps Su
67. 8 Close the liquid stop valve completely To avoid the spillage and leakage of refrigerant when the check valve is broken Check the leakage of the check valve on the discharge gas When performing by the comp replacing mode leakage side of the check valve can be checked by Ps variation DSW4 4 ON the comp forced stoppage because SVA opens so that the discharge gas side of The comp will not run regardless of the remote control inverter comp is connected to the lower pressure side Switch command Within 0 03MPa 2 min is the permissible limits for the Check the variation of Ps check valve on the discharge gas side Make sure that the Ps increase is within 0 03MPa for The leakage of the check valve may cause an incorrect 9 2 min after the Ps increase at the stoppage approx brazing due to the gas pressure at the brazing of the 5 min discharge piping Make sure that Pd gt Ps at this time Ifthe comp replacing mode is performed again set DSW4 4 to OFF side and start from Process No 4 after F or smaller 10 min Ps 2 Min Time Collect the refrigerant according to either A or B The discharge of the refrigerant in the atmosphere depending on the Process No 9 is strictly forbidden Make sure that the refrigerant is A If the leak rate at the Process No 9 is within the collected by the collector 10 specification collect the refrigerant only at the low Measure the quantity of the collected refrigerant pressur
68. Abnormal inverter fin thermistor PUN Electronic thermal activation A Inverter voltage decrease Insufficient Voltage AN S m Voltage increase a Abnormal Inverter transmission Reset of micro computer for inverter a PUR Abnormal power source phase a Lu Abnormality of detection for fan motor position Fan controller retry a I DIO SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting HITACHI Service Manual Inspire the Next 1 Protection control code is displayed on 7 segment when a protection control is activated 2 Protection control code is displayed while function is working and goes out when released 3 When several protection control are activated code number with higher priority will be indicated see below for the priority order Higher priority is given to protection control related to frequency control than the other Priority Protection control Priority Protection control 1 Pressure ratio control 8 Low pressure increase protection 2 High pressure rise protection 9 Demand current control running current limit control 3 Current protection 10 High pressure fall protection 4 Inverter fan temperature rise protection 11 Oil return control 5 Discharge gas temperature rise protection 12 TdSH fall protection 6 Low pressure decrease protection FSN2 Discharge gas superhea
69. Abnormal low or high pressure sensor Excessively low suction pressure in vacuum Check the connector for PCB1 Replace the pressure sensor if faulty Incorrect connection between the indoor unit and the outdoor unit Check the electrical system and the ref cycle Correctly connect between the indoor unit and the outdoor unit Locked Ex valve Check the connector for PCB Repair or replace the connector of PCB or the ex valve Closed Ex valve by disconnecting Td thermistor Check Td thermistors for compressors and measure Td thermistor resistance Repair or replace Td thermistor Faulty outdoor fan motor Measure the coil resistance and the insulation resistance Replace the outdoor fan motor if faulty Check for the conduction after the temperature of the outdoor fan motor is decreased Replace the outdoor fan motor Measure the resistance by means of the tester Remove looseness and replace the connector Internal Thermostat for Outdoor Fault Fan is Activated in Heating Faulty int process auty niema Incorrect thermostat contact Incorrect connection Check the connection Connect correctly 450 SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description H H Activation of inverter overcurrent protection device 1 W The RUN LED flickers and ALARM is d
70. Applicable air temperatures for the checking procedure Coolin Room temperature 20 C 30 C DB 9 Outdoor temperature 15 C DB or more Heatin Room temperature 20 C 30 C DB 9 Outdoor temperature 0 C 15 C DB Checking procedures for cooling Process 1 Convert iE indoor unit expansion valve opening with the following table Indoor Unit HP Conversion 0 8 to 6 HP iE 8 and 10 HP iE x 2 0 2 Sum up the converted values of iE SMGB0049 rev 2 08 2010 90 Judgement systems for refrigerant amount Test run HITACHI Service Manual Inspire the Next 3 Calculate the total frequency H1 Inverter frequency Constant compressor reduced frequency according to the following table Converted frequency of constant speed compressor Outdoor Unit Model MC2 MC3 MC4 MC5 RAS 14 16FSN2 50 RAS 18 20FSN2 50 50 RAS 22 24FSN2 50 7T RAS 26 28FSN2 77 77 RAS 30 36FSN2 77 77 50 RAS 38 42FSN2 77 77 50 77 RAS 44 48FSN2 77 77 77 77 Judgement If total of converted iE Total frequency lt 0 7 Insufficient refrigerant If total of converted iE Total frequency gt 1 6 Excessive refrigerant Checking procedures for heating e Process 1 Detect oE total outdoor unit expansion valve opening 0E1 0E2 0E3 0E4 2 Calculate the total frequency H1 Inverter frequency Constant compressor reduced frequency according to the pre
71. Check item Turn OFF the main switch Action Disconnection or insufficient contacting of the remote control cable Incorrect wiring connection incorrect polarity Check the cable and the connections Check the wiring and the connections Repair the cable or connect the cable Repairing Failure of the remote control switch Check the remote control switch by means of the self check mode 1 Replace the remote control Switch if the remote control Switch is faulty Failure of PCB in the indoor unit and the remote control switch Disconnected wire to PCB Check the connectors Correctly connect the wires Failure of PCB Check PCB by means of the self check mode 2 Replace PCB if it failed 1 Refer to section Se f checking of remote control switch 2 Refer to section Se f checking of PCB using remote control switch SMGB0049 rev 2 08 2010 494 Initial troubleshooting HITACHI Inspire the Next Troubleshooting Service Manual In the case that no abnormality Alarm Code is indicated on the remote control switch and normal operation is not available take necessary action according to the procedures mentioned below Phenomenon Cause Check item Action Turn OFF the main switch RUN LED is ON and the LCD is indicated However the system does not operate For example the indoor fan the outdoor fan or the compressor does not op
72. Initial troubleshooting Troubleshooting Service Manual Abnormal operation of the devices Cont HITACHI Inspire the Next Phenomenon Insufficient cooling process Cause Indoor heat load is greater than the cooling capacity Check item Calculate the heat load Action Turn OFF the main switch Use a bigger unit Gas leakage or shortage of refrigerant Measure superheat Correctly charge the refrigerant after repairing the gas leakage Excessively small diameter tube or long piping Measure and check the field supplied pipes Use the correct pipes Incorrect activation of the check valve of the outdoor unit Check whether or not the temp difference exists before after the check valve Replace the check valve for the outdoor unit Excessively low suction pressure Failure or malfunction of the expansion valve Check for clogging Remove the clogging Check the connection cord and the connector Replace the connector Is there an operation sound from the coil Is the thermistor on the compressor normal Replace the coil Replace the thermistor Is the thermistor installed correctly on compressor Correctly install the thermistor C logged strainer in the indoor unit clogging at the low pressure piping Check the temp difference at the inlet and the outlet of the Replace the strainer in the indoor unit stra
73. LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are indicated on the display of the outdoor unit PCB1 This alarm is indicated when one of safety devices is activated during compressor running Is the voltage PCB1 Outdoor unit printed circuit board Does CMC1 ON No Bison eli No when starting none THO Faulty PCB1 P terminal N1 220V d a LER Check witring connection for No PCB1 Yes Yes no looseness Is the protective device still Is PCNS Restart after operating No PCN2 PCN16 Yes connecting PCN3 No continuity between 1 and hau COE a PCN2 PCN16 3 of PCN2 PCN16 PCN17 Mice PCN17 PCN18 or PCN18 PCN52 on PCB1 PCN52 on PCB1 correctly Yes Does CMC1 turn No ON for more than 3 Faulty PCB1 seconds Yes Y Normal PCB1 A Y Check activation of the following safety devices Remove the cause after checking High Pressure Switch PSH 4 15 MPa Outdoor Unit PCB1 Display Indication HE Abnormality of PSH1 Abnormality of PSH2 Abnormality of PSH3 High Pressure Switch Connector No Model PSH1 PSH2 PSH3 PSH4 PSH5 PCN2 PCN16 PCN17 PCN18 PCN52 RAS 8 to 12
74. MC5 ON i Power to Y52C5 ON Power to CH5 OFF A 30 48HP Power to MC4 ON 3 Power to Y52C4 ON EC Power to CH4 OFF D 18 48HP Power to MC3 ON Power to Y52C3 ON C Power to CH3 OFF b 14 48HP Power to MC2 ON Power to Y52C2 ON gt C Power to CH2 OFF Power to CH1 OFF n case of comp heat temp is high Note Tne number of comp is Yes controlled by I U capacity control Higher than Set Temp Cooling LU P t 2 5 C Power to MC1 p Air intake heat OWET D with inverter fre LU erati A g quency I temp load big Y52C1 ON capacity control ON lt 5 C Lower than set temp Outdoor Fan MOF Air flow 100 for 10 sec PID Control for I U and O U Electronic Ex Valve Operation at set indoor fan speed Power to MC1 MC5 OFF Outdoor 25 C Outdoor 18 C Outdoor Fowento Chil CHS ON Temp Temp Temp to 1 gt 25 C r Outdoor Fan MOF Outdoor Fan MOF Outdoor Fan MOF Outdoor Fan MOF O NO TE Air Flow Hi Air Flow Me Air Flow Lo Air Flow SLo In case of RPI 8 10FSN2E fan speed High and Medium y y Y A are the same both are High SMGBO0049 rev 2 08 2010 53 Standard operation sequence HITACHI Inspire the Next Cooling process cont Control system Service Manual Pressing AUTO LOUVER switch gt Start of A AUTO LOUVER i MeSSsicece sree sece
75. No is the fan m t r No indoor fan run the internal thermostat of the hot gt Replace the motor indoor fan motor Yes Yes No Is the connection bad at the Repair the wiring and gt connector the connections Is the coil resistance of the No fan motor normal Replace the motor Yes Check the indoor temperature If the indoor temperature is unusual take a suitable action to reduce the indoor temperature Phenomenon Cause Check item econ Turn OFF the main switch Faulty indoor unit fan motor Measure the coil resistance and the insulation resistance Replace the motor if faulty m Fault Activation of the internal thermostat for the indoor Check the continuity after the fan motor temperature decreases to room temp Replace the fan motor if there is no continuity unit fan motor Faulty internal thermostat Insufficient contacting Correct looseness Replace the connectors Measure the resistance by means of the tester Incorrect connection Check the connections Repair the connections SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description d Abnormal operation of the high pressure sensor for the outdoor unit W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternatel
76. OK N CHECK VEN switch SMGB0049 rev 2 08 2010 159 Troubleshooting procedure HITACHI Inspire the Next Although the wireless controller is used for the wall type indoor unit with the built in receiver part you can check the alarm code by connecting the PC ART Suction grille Connector for check E Contents of the Check mode 1 Troubleshooting Service Manual NOTES 1 The unit does not operate by pressing the operation switch 2 The above function is available only when the alarm occurs 3 The PCB check by means of the remote control switch is not available 4 The indication is the data when you are connecting PC ART The indication is not the data before the alarm occurs The next indication is shown if you press the part A of the TEMP switch If you press the part 7 of the TEMP switch the previous indication is shown Temperature indication 1 Indoor unit temp setting CC Indication of the category code Indication of the temperature etc temp C Temperature at remote sensor C l VN Qm Lr m Li Qm Lr qu 6 Outdoor unit ambient LIT r1 temp C LU Cot Indoor unit heat m 7 exchanger gas pipe h d i d temp C Outdoor unit ri DN E 8 evaporatin
77. Operation 2 Turn OFF in comp stoppage For refrigerant collection 1 Turn ON in comp operation 2 Turn OFF in comp stoppage OFF I U Indoor Unit Tc Te Condensing Temperature Evaporating Temperature Td Discharge Temperature TI Liquid Temperature Tg Gas Temperature Cap Capacity Temp Temperature comp Compressor SMGB0049 rev 2 08 2010 Device control system 49 HITACHI Inspire the Next The figure below shows the outline of the control system Example RAS 48FSN2 Indoor unit Wireless remote control switch Remote con trol MCU Transmission circuit JL Thermistor for inlet air Thermistor of discharge air Thermistor for gas pipe Thermistor for liquid pipe y Suction gas pressure sensor Ps Discharge gas pressure sensor Pd Thermistor for ambient temperature THM7 Discharge gas thermistor THM8 9 12 13 18 Therm for heating evap temp THM10 11 15 16 Control system Service Manual Multiple signals Single signals Operation signals Therm for super cooling temp at main line THM17 Therm for super cooling temp at bypass line THM23 380 415V Power source
78. Replace or correctly connect the wires if Abnormal Operation exists Failure of the indoor unit PCB Check PCB by means of the self check mode 1 Replace PCB if it failed 102 SMGB0049 rev 2 08 2010 Initial troubleshooting Troubleshooting Service Manual Abnormal operation of the devices Cont HITACHI Inspire the Next Phenomenon The Comp does not stop or start even if the setting temperature on LCD is changed 3 Cause Incorrect optional setting Check item Check the setting condition of thermistor of remote control Switch by means of the optional setting Setting and control 00 Control by means of the indoor thermistor for the suction air 01 Control by means of the thermostat of the remote control switch 02 Control by means of the average value of the indoor thermistor for the suction air and the thermostat of the remote control switch Action Turn OFF the main switch If the thermostat of the remote control switch is not used set at 00 Incorrect Input Output Setting Check Setting Condition of i1 and i2 by Input Output Setting Setting and Control 01 Room Thermostat Cooling 02 Room Thermostat Heating In case that room thermostat is not used set for input signal actually used If no signal is used set at 00 1 Refer to section Self checking of PCB using remote control switch 2 Refer
79. and the heating Incorrect Connection Check the wiring to PCB1 connections Faulty PCB1 Replace ak cneckithe Replace PCB1 if faulty Model Thhermistor No Connector No Te1 Te2 Te3 Te4 Tchg Tsc THM10 THM11 THM15 THM16 THM17 THM23 RAS 8 to 12FSN2 O O O RAS 14 to 24FSN2 O O O O RAS 26 to 42FSN2 O O O O O RAS 44 to 48FSN2 O O O O O O SMGB0049 rev 2 08 2010 140 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description d H Abnormal operation of the low pressure sensor for the outdoor unit E The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the low pressure sensor voltage decreases lower than 0 1 V or increases higher than 4 9V during the operation Is the connection CN8 of the outdoor unit PCB1 bad Connect it correctly Is 12 VDC applied across 1 and 3 of the connector CN8 of the outdoor unit PCB1 Faulty PCB1 Yes Is the voltage under 0 1 VDC or over 4 9 VDC across 2 and 3 of the connector CN8 of the outdoor unit PCB1 Faulty PCB1
80. are operated at cooling mode nanan nn o 12345678 NOTES This function is automatically judged at the cooling mode At heating mode this function is not available Check to ensure that the indoor and outdoor air temperature is within the applicable range Contents of judgement for refrigerant charge amount During the judgement operation the 7 segment display is changed according to the operating condition I nr Checking Refrigerant Cycle Condition 6 LW hae M e It takes 10 minutes or more from starting judgement rm During Judgement Refrigerant Charge Amount ch B3 i Ss It takes 10 minutes or more from starting judgement In case of not indicated the judgement result it may be impossible to judge because Judgement result indication that the refrigerant cycle is varied widely Refer to the item 3 2 f Result 7 segment Indication Remarks The refrigerant amount is sufficient Patgerant rime However check to ensure that it is possible to indicate the same judgement in case of the excessive refrigerant o The refrigerant amount is insufficient Ren ut PFnu n After charged measure of 3 or less of addtional refrigerant perform om the refrigerant amount judgement again NOTES 1 This function is utilized in case of insufficient refrigerant only not utilized in case of the excessive refrigeran
81. automatically restarted when the fault is removed PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Is THM2 connected to intake No of PCB Connect it Yes Is the resistance of THM2 between 0 24kQ and 840kQ Faulty thermistor x i Indoor unir air inlet N thermistor THM2 In case of 4 way N cassette Faulty PCB Refer to alarm code 11 for thermistor resistance Action Phenomenon Cause Check item Turn OFF the main switch Fault Check the resistance Replace the thermistor if faulty Faulty air outlet thermistor Incorrect connection Check the connection Repair the wiring and connections Replace PCB and Faulty PCB check the operation Replace PCB if faulty SMGB0049 rev 2 08 2010 131 Troubleshooting procedure H ITACH i Troubleshooting Inspire the Next Service Manual Alarm code Description 1 Abnormal operation of the thermistor for the indoor unit heat exchanger l liquid refrigerant pipe temperature freeze protection thermistor W The RUN LED flickers and ALARM is displayed on the remote control switch E The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the thermistor is short circuited less than 0 24 KO or cut greate
82. cancelled However the test run function Heating SET DSW4 2 ON the outdoor unit of the outdoor unit is not cancelled Continuous operation during 2 Check to ensure that he DSWA 1 of the outdoor ON hours is performed without the unit PCB is turned OFF Al aa Thermo OFF condition If the more than one indoor unit is connected with 123456 one remote control switch all the units start the Starting the test run Pus run at the same MB due iu ee e power source so that the indoor units do no Set DSW4 1 at ON The perform the test run If this is the case the TEST operation starts after 20 s RUN indication of the remote control switch may In case of heating process leave flicker This is not abnormal DSW4 2 at ON Outdoor unit ON Gua Mana i 23456 KR i a zm Power OFF The setting of DSWA is not required for the test run from the remote control switch Manual j Setting the compressor manually When DSW4 4 is ON during Do not turn ON and OFF the compressor frequently more than three seconds during the heating process The defrost operation starts after two minutes This function is available once the heating process has been running for five minutes Manual defrost operation finishes The defrost operation automatically finishes and the heating process starts frosting conditions and the total time of the heating process The defrost operation is not performed when the temperature of th
83. during the operation Operating signal will be sent when the indoor units are operating Even when one 1 indoor unit is operating the signal will be sent This function can be used for circulator or humidifier operation Setting Example Operation Signal at Output 1 between 1 and 2 pins of CN16 Auxiliary relay _ 3P Connector housing Outdoor unit PCB1 CN16 Connector Wiring diagram example of operation signal 5 Bl Output 2 Alarm signal Control function No 2 Auxiliary relay contacting RYa is closed when the alarm occurs Alarm signal will be sent when the alarm occurs from the indoor units The signal will be sent even when the alarm occurs from one 1 indoor unit Setting Example Alarm Signal at Output 2 between 1 and 3 pins of CN16 Auxiliary relay 3P Connector housing eee a ee Outdoor unit PCB1 CN16 Connector Wiring diagram example of alarm signal SMGB0049 rev 2 08 2010 73 Outdoor units Available optional H ITACH l functions Inspire the Next Service Manual E Output 2 Compressor ON signal Control function No 3 Auxiliary relay contacting RYa is closed during the compressor operation Setting Example Compressor ON Signal at Output 2 between 1 and 3 pins of CN16 Auxiliary relay 3P Connector housing bu c MON M PUMA Outdoor unit PCB1 CN16 Connector Wiring diagram example of compressor ON signal E Ou
84. est f 0 D Er the inverter stoppage code ITC 11 and the unit can not be o operated In this case check to ensure the surge absorber SA 5l A s on the noise filter NF1 If the inside of the surge absorber is BA s dq A normal turn OFF the power once and wait for PCB2 s LED OFF x FE S and turn ON again Lt BIG GB oo n o s SMGB0049 rev 2 08 2010 154 Troubleshooting procedure Troubleshooting HI ITACHI Service Manual Inspire the Next Alarm code Description H Increase in the inverter fin temperature W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB Incase that the abnormality of alarm code 51 or 54 occurs three times within 30 seconds the alarm code of abnormality occurred for the third time is indicated Retry operation is performed up to second time of abnormality occurrence Conditions This alarm is indicated when the temperature of the internal thermostat for transistor module is higher than 100 C Yes Good Restart the operation Check the thermistor Replace the PCB2 1 Does it trip soon No Faulty gt Replace the thermistor Yes Is the heat exchanger of the gt outdoor unit clogged R
85. for the inverter PCB1 Outdoor unit printed circuit board Restart the operation PCB2 Inverter printed circuit board Is the power supply N voltage 10 of the o i P Check x wiring and the nominal voltage cable capacity Yes No Is the voltage over 323V during the operation 400V Yes Does the voltage fall during Yes the operation because of the operation of other apparatus No Frequency can increase higher than 60 Hz Does LED201 on PCB2 How is the Y Compressor stops is ON after compressor s x compressor ined oer dh gt Faulty PCB2 electromagnetic switches operation 20 Hz Replace it CMC 1 turn ON Compressor stops when No frequency increases Approx 20 Hz to 60 Hz Is connection correctly between No PCB2 and capacitors CB CB1 C t i and CB2 DCL or CMC 1 ee ery Be extremely carefull because of the ju high voltage Yes Faulty Check capacitors Is the DC voltage over 460V CB CB1 2 gt Replace the capacitors Capacitors have high voltage No Be extremely carefull 1 Normal Y gt Faulty PCB2 Replace it Check the wiring transistor 1 If the capacitor has a high voltage perform the high voltage discharge procedure module and the capacitors 2 Checking procedures of the
86. high and low pressure sides 3 Disconnect the piping connected with oil separator liquid tank and accumulator 4 Removing oil separator liquid tank and accumulator Before replacing the liquid tank remove the electrical control box upper cover fan motor and motor clamp SMGB0049 rev 2 08 2010 230 Outdoor units FSN2 Servicing HITACHI Service Manual Inspire the Next Bl Removing oil separator RAS 8FSN2 to RAS 12FSN2 1 Loosen two 2 screws at the oil separator rear side through the space between oil separator and accumulator with a Phillips screwdriver The back side of the oil separator bottom plate are U shaped dent structure Only loosening the screws oil separator is removed at the bottom back side NOTE Pay attention not to be injured with the plate edge or the heat exchanger fins Oil Separator 2 Remove two 2 screws fixing at the oil separator front side 3 Pull out the oil separator to front side and remove the screws at back side 4 Remove the oil separator from the outdoor unit NOTE If the oil is collected from the oil separator before removing refer to the item Replacing return oil circuit strainer RAS 14FSN2 to RAS 28FSN2 Oil Separator RAS 30FSN2 to RAS 48FSN2 figure for RAS 48 FSN2
87. in the next page connecting the return oil circuit NOTE When removing the oil separator and the flare nut at the top of return oil circuit refrigerant oil comes out Prepare the oil pan to receive the refrigerant oil before removing Remove the flare nut B as shown in the below figure or in the next page connecting the return oil circuit with the oil separator outlet port Attach the return oil pipe for replacement After replacement charge nitrogen from the check joint at the lower pressure side Check that no leakage at the flare nut connection When the strainer clogging and oil color change into black were found at the procedure 4 oil in the oil separator should be replaced Perform vacuuming and charge the refrigerant When the strainer clogging and oil color change into black are found oil in the oil separator should be replaced according to the following procedure RAS 8FSN2 to RAS 12FSN2 B Flare nut for oil separator outlet port Servicing Service Manual E Replacing oil for oil separator a Collect all remaining refrigerant in the refrigerant cycle through refrigerant collecting system Both high and low pressure sides Remove the flare nut connecting return oil circuit with the oil separator outlet port Connect the charging hose to the union size 1 4 inch at the oil separator outlet port Discharge the oil in the oil separator f
88. intake grille 203 9 1 2 Removing front service panel 204 9 1 3 Removing fan guard net 205 9 1 4 Removing outdoor fan 206 9 1 5 Removing compressor 208 9 1 6 Replacing return oil circuit Strainer 218 9 1 7 Removing high pressure switch high pressure sensor and low pressure sensor 220 9 1 8 Removing reversing valve and removing reversing valve coil 223 9 1 9 Removing solenoid valve and solenoid valve coil 226 9 1 10 Replacing oil separator liquid tank and accumulator 230 9 1 11 Removing stop valve 234 9 1 12 Removing expansion valve coil 236 9 1 13 Removing thermistor forliquid pipe 238 9 1 14 Removing thermistor for ambient temperature 240 9 1 15 Removing electrical control box 241 9 1 16 Removing other electrical components 243 SMGB0049 rev 2 08 2010 202 Servicing HITACHI Service Manual Inspire the Next 9 1 Outdoor units FSN2 B At Rear Side B At Right and Left Side 1 Remove screws at the bottom of the air intake grille 1 Remove six 6 screws fixing each side of the air intake grille six 6 screws per grille 2 Remove the air intake grille by pulling up and unhook 2 Remove the air intake grille by pulling upward and unhook E RAS 8FSN2 to RAS 12FSN2 E RAS 14FSN2 to RAS 24FSN2 Upper Cover Air Intake Grille 4 Rear Side a E RAS 42FSN2 to RAS 48FSN2 Upper Cover O Air Intake Grille Rear Side gr Q After removing the upper cover remove this scre
89. main switch check the item below If the nominal voltage for the outdoor unit is 415V change the connector CN4 to CN5 of the transformer TF in the electrical box as shown in the figure below SMGB0049 rev 2 08 2010 33 Electrical wiring for the outdoor unit HITACHI Inspire the Next Quantity and location of DIP switches Push switch PSW1 manual defrost Push switches PSW2 PSW3 Ckecking by 7 segment RSWi DSwi Qm PSW1 PSW2 PSW3 ES Een SEG2 SEG1 SW psw3 DSW SW3 DSWS DSWe DSW7 DSW8 DSW9 DSws pSws Electrical wiring Service Manual O NOTE The mark m selection Not mark m indicates pin position is not affecting indicates position of dips switches Figures show setting before shipment or after A CAUTION Before setting dips switches firstly turn off power source and set the position of the dips switches If the switches are set without turning off the power source the contents of the setting are invalid Dip switches setting ll DSW1 Setting the refrigerant cycle number Setting is required Set the unit number of outdoor unit at each refrigerant cycle Setting before shipment is unit 0 DSW1 RSW1 Setting before shipment ON eo unit number 0 eee T 123456 Nas Tens digit Last digit Example in case of setting refrigerant cycle number 25 ON 7 Maximum cy
90. measure the resistance If all the resistances are greater than 100kQ it is normal SMGB0049 rev 2 08 2010 182 Procedure for checking each main part Troubleshooting HI ITACHI Service Manual Inspire the Next Bl Checking procedure for diode module Outer appearance and internal circuit of diode module A CAUTION Do not use a digital tester Terminals Remove all the terminals of the diode module before check If items a to d are performing and the results are satisfactory the transistor module is normal Measure it under 1kO range of a tester a By touching the side of the tester to the terminal of diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance If all the resistances are from 5 to 50kQ it is normal b By touching the side of the tester to the terminal of diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance If all the resistances are greater than 500kO it is normal c By touching the side of the tester to the terminal of diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance If all the resistances are from 5 to 50kQ it is normal d By touching the side of the tester to the terminal of diode module and the side of tester to the terminals 3 NOs of the diode module measure the resistance I
91. min at 18 48HP Power to MC3 ON gt A F Max Power to Y52C3 ON Power to CH3 OFF A 14 48HP a gt Power to MC2 ON s E Power to Y52C2 ON Power to CH2 OFF Power to CH1 OFF in case comp temp is high Yes Power to MC1 with inverter frequency I U capacity control ON Power to Y52C1 ON PID Control for I U and O U Elec tronic Ex Valve ON Lower than Set Temp Heating LU Air intake heat temp ed big Higher than set temp MIF Operation at Power to Power to Slow Speed gt Y21z ON gt RVR2 ON to 1 y Uni Indoor Fan Stop for 3 min at max Air Discharge Temp lt 10 C and Pd lt 2 2 MPa Operation at set No After 3 48 sec 2 wore INTER U Ai peration at slow In case of RPI 8 10FSN2E Discharge eee P 1 Permitting Down fan speed High and Medium im B wardAirbyAuto are the same both are High LU fan speed eara DN Only for units with auto louver SMGB0049 rev 2 08 2010 57 Standard operation sequence HITACHI Inspire the Next Heating process cont Pressing AUTO LOUVER switch Pressing RUN STOP Switch Control system Service Manual gt Start of i AUTO LOUVER i K Q2 O LV On nuu only for air panel or
92. of O U 2 Connect manifold to the check joint at low and high pressure sides in O U 3 Turn ON the main switch of O U 4 In case of comp failure Refer to 2 and 3 of Emergency Mode Operation from DSW5 ON O U PCB1 so that the failure comp will not run PCB in Emergency Mode Operation for more details Pre refrigerant collection during cooling operation After closing the gas stop valve the decrease of Ps value is Start the test run by DSW4 1 ON O U PCB1 fast To guarantee the reliability of the comp make sure that The test run should run for approx 20min the decrease does not reach Ps 0 1MPa when performing until Ps 0 3MPa Td gt 750C the forced stoppage 5 Ps is indicated on 7 seg O U PCB1 Close the gas valve immediately and perform the forced stoppage DSW4 4 ON when Ps 0 2MPa Cancel cooling operation DSW4 1 OFF Cancel the forced stoppage DSW4 4 OFF Perform the operation for exchange comp This operation is performed up to a maximum of 10 min 6 Close all the gas stop valves If the inverter comp is excluded the operation starts after Press PSW3 for 3 sec after DSW4 6 ON O U PCB1 3 min cooling operation starts Finish the operation for exchange comp one of the followings 7 10 min has passed STP 7 seg is indicated 08 7 seg is indicated When Ps lt 0 1MPs 1 min continuously within 10 min STP 7 seg is indicated
93. of compressor Mpa Pd Discharge pressure of compressor Mpa Li q i P Das DUE Inverter current protection Inverter output current 2 23 5A 380 415V Frequency decrease ut ien D EM Li TI ra EM Inverter fin temp increase protection Fan motor controller fin temperature increase protection Inverter fin temp 2 89 C Frequency decrease Fan motor controller fin temperature 100 C 1 Daad Ln Discharge gas temperature increase protection Temperature at the top of compressor is high gt Frequency decrease Maximum temperature is different depending on the frequency ut e ro m Low pressure decrease protection Low pressure is excessively low Frequency decrease Minimum pressure is different depending on the ambient temperature Bn m Reversing valve When switching AP Pd Ps T switching control AP lt 1 0MPa Frequency increase AP gt 1 3MPa Frequency decrease mit Oil return control Frequency less than a is maintained for more 7 LU a than1 hour Frequency 2 a Cooling operation 75 Heating operation 84 Li q Li ps High pressure decrease protection Discharge pressure of compressor decrease gt Frequency increase 1 4 Li K Demand current control Running current imit control Compressor run current 2 Demand setting value Frequency decrease Demand current
94. power to the outdoor unit and indoor units 2 Wait for 30 seconds 3 Push PSW1 on PCB more than 3 seconds E Pay attention to the following items while the system is running A Do not touch any of the parts by hand at the discharge gas side since the compressor chamber and the pipes at the discharge side are heated higher than 90 C B DO NOT PUSH THE BUTTON OF THE MAGNETIC SWITCH ES It will cause a serious accident E Do not touch any electrical components for at least 3 minutes after turning OFF the main switch Bl Check that the refrigerant piping setting and electrical wiring setting are for the same system by operating the indoor unit one by SMGB0049 rev 2 08 2010 83 Checking procedure before the test run HITACHI Test run H Inspire the Next Service Manual HERE s A CAUTION Bi Caution for Insulation Resistance If total unit insulation resistance is lower than 1 megohm the compressor insulation resistance may be low due to retained refrigerant in the compressor This may occur if the unit has not been used for long periods 1 Disconnect the cables to the compressor and measure the insulation resistance of the compressor itself If the resistance value is over 1 megohm then insulation failure has occurred of other electrical parts If the insulation resistance is less than 1 megohm disconnect the compressor cable from the inverter PCB Then turn on the main power to apply current to the c
95. ref cycle Check the refrigerant quantity 1 Recharge the refrigerant after the vacuum pumping Clogging of the discharge pr piping Check for clogging Remove the clogging process Check the temp difference at the inlet and Malfunction or internal leakage of the 4 way valve Replace the 4 way valve the outlet of the 4 way valve Check the temp difference Malfunction of the check valve of the outdoor unit atthe inlet and the outlet Replace the check valve of the check valve Failure of the bypass Check for leakage of the Replace the solenoid valve solenoid valve solenoid valve Excessively high suction pressure Malfunction or internal Check tNetemp diference at the inlet and the outlet Replace the 4 way valve leakage of 4 way valve of the 4 way valve Check the expansion Replace the failed expansion Discharge temp of the indoor unit is unstable valve of the indoor unit in P pan valve of the indoor unit the same system 1 Refer to chapter 7 of TC 108 SMGB0049 rev 2 08 2010 Initial troubleshooting Troubleshooting Service Manual Abnormal operation of the devices Cont HITACHI Inspire the Next Phenomenon Cause Check item Action Turn OFF the main switch Foreign particles inside of the fan casing Visually inspect it Remove the foreign particles Indoor unit fan runner is hitting the casing Visually inspect it Adjust the
96. refrigerant oil does not absorb the moisture in the atmosphere 14 After re connecting the union at the return oil circuit perform vacuuming and refrigerant charging If the test run after replacing compressor is performed follow Method of Collecting Refrigerant E RAS 14FSN2 to RAS 24FSN2 S S ll RAS 8FSN2 to RAS 12FSN2 mA ES ffs Oil Separator Oil Separator Y ff Return Oil Circuit Union Return Oil Circuit Union ll RAS 26FSN2 to RAS 42FSN2 Figure for RAS 42FSN2 Oil Separator Return Oil Circuit Union Oil Separator E RAS A4FSN2 to RAS 48FSN2 Return Oil Circuit Union Union at Return Oil Circuit SMGBO0049 rev 2 08 2010 215 Outdoor units FSN2 HITACHI le Inspire the Next Service Manual 15 Wind the oil heater around the compressor 7 Oil heater mounting position Back to the original setting NOTES Refer to the procedure 6 1 If the power line or the oil heater lead line 16 Attach the waterproof cover contacts with the high temperature part such as oil discharge pipe or compressor chamber 17 Reconnect all wires in the original positions the wire may be cut or fired Protect the wire The oil heater lead wire is fixed inside the waterproof from overheating and protect the edge with the cover with the tack without contacting with the waterproof cover power line and the piping 2 Check t
97. rev 2 08 2010 Protection and safety control Control system H ITACH l Service Manual Inspire the Next 4 4 Standard operation sequence Power to OU ON powerto PCB in O U ON Power to CH1 CH5 Power to O U OFF Correct phase Only for indoor units m Auto louver 0 with auto louver Reset Start of Transmission between Power to Power to PCB in gt O U I U and Remote Control 1 U ON LU ON EE Switch Higher than Ac tivation Level Power to AR in I U OFF Power to AR in ON L U ON Lower than Activation Level Is phase correct Reverse phase Alarm Code 05 for Unit with drain pump Setting at EM COOL COOL indication High HIGH indication Air Pressing flow Medium FAN Switch changeover switch MEDIUM indication Low t LOW indication Pen gt A Switch Increasing Set Temp TO Suiten WV Switch Decreasing Set Temp Set Temp indicated t Run LED ON RUN is nated Pressing _ Power to YH2 for A Power to EHW ON RUNS Oe 20 sec only for RPC units witc Power to YH2 ON 38 48HP Power to
98. same with characteristic in the Faulty th figure L aulty thermistor Yes Indication on the display of the outdoor unit PCB1 Faulty PCB1 Z JL rau ret Z 3 rau ta2 Thermistor characteristics 3 Z _ 3 Faulty tas Resistance of thermistor kQ H Pad X Faulty Td4 200 5 Z Faulty Td5 100 14 2 8 32 0 25 50 100120 150 Air temperature C Action Phenomenon Cause Check item Turn OFF Main Switch Fault Check resistance Replace thermistor if faulty Faulty thermistor for the discharge gas Incorrect connection Check wiring to PCB1 Repair wiring and connections Replace PCB1 and check Faulty PCB1 operation Replace PCB1 if faulty Check the setting of DSW2 on Incorrect setting of DSW2 on PCB1 PCB1 Correctly set DSW2 on PCB1 SMGB0049 rev 2 08 2010 139 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description ALI Abnormal operation of the thermistor for the evaporating temperature during m the heating process outdoor unit W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 If you find an abnormal operation of the thermistor check all the ther
99. seal the pipe ends with tapes Check that the waterproof cover inner side aluminium sheet does not contact with the terminals of the high pressure switch Make sure to fix the insulating sleeve of the faston terminals as shown in the figure If the terminals of the high pressure switch is exposed and contacts with the waterproof cover the electrical components may be damaged E Removing high pressure sensor and low pressure sensor 1 Remove the connector for the pressure sensor wiring from PCB1 NOTE Remove the connector firstly If not the wiring may be damaged 2 Remove the refrigerant piping for the high pressure sensor or low pressure sensor by use of two spanners SMGB0049 rev 2 08 2010 222 Outdoor units FSN2 Servicing Service Manual Faston terminal b SS S Wi t 3 High pressure switch Discharge part AFN Brazing part Compressor Wire twisting must be within 3 winds a Tightening position shadowed Spanner size 14 mm Tightening position shadowed Spanner size 17 mm This part must be sealed with tapes DO NOT apply spanners to this part Using two spanners Tightening torque 30 Nm Servicing HITACHI Service Manual Inspire the Next 1 Remove the front service panel according to the item Removing Front Service Panel 2 The reversing valve fixing position is as shown in the figure RAS 8FSN2 to RAS 12FSN2 RAS 14FSN2 to RAS 24FSN2 fi
100. stoppage mrt Ko ne Di Da Dai Daad aa ug Pu E3 Te Pad EET a PD Abnormal operation occurrence counter 4 Tae m LI Abnormal operation q 15 Z occurrence counter L Instantaneous power an Li D D Transmission error occurrence counter between i Li x z 4 17 remote control switch and LI t LL indoor unit 1 If a transmission error continues for three minutes one is J added to the occurrence counter Abnormal operation rat nnm 2 The memorized data can be cancelled by the method which 18 occurrence counter on I du LU LI is explained in section 7 3 1 Self checking Procedure of invertor i PCB by means of the Remote Control Switch Indication of automatic louver condition Z rr 19 Louver sensor J i Iti l SMGB0049 rev 2 08 2010 161 Troubleshooting procedure Troubleshooting HITACHI Inspire the Next Service Manual Compressor pressure frequency indication 20 Discharge pressure Lt d Ew high x 0 1 MPa F t a l 24 Suction pressure low x a4 Z1 yp This
101. switch This switch cuts out the operation of the compressor when the discharge pressure exceeds the setting Oil heater This band heater protects against the oil carry over during the cold starting as the band heater is energized while the compressor is stopped Fan motor protection Internal thermostat that is embedded in the fan motor winding this internal thermostat cuts out the operation of the fan motor when the temperature of the fan motor winding exceeds the setting Safety and control device setting for the outdoor units E RAS FSN2 RAS 8 RAS 14 RAS 18 RAS 22 RAS 26 RAS 30 RAS 38 RAS 44 Model RAS 10 RAS 16 RAS 20 RAS 24 RAS28 RAS 32 RAS 40 RAS 46 RAS 12 RAS 34 RAS 42 RAS 48 RAS 36 For Compressor Automatic Reset Non Adjustable each one for each compressor Pressure Switches 4 15 0 05 0 15 High Cut Out MPa i Cut In MPa 3 20 0 15 40x2 40x2 40x2 40x2 40x2 40x2 40x2 40x2 40x2 40x2 Fuse A 40x2 32x2 32x2 32x2 40x2 40x2 40x2 40x2 32x2 40x2 40x2 322 32x2 40x2 40x2 40x2 Oil Heater Capacity W 40x2 40x4 40x6 40x8 40x10 CCP Timer Non Adjustable Setting Time min 3 For Condenser Fan Motor Automatic Reset Non Adjustable Internal Thermostat each one for each motor Cut Out C 14545 Cut In eC I 7 7 94215 For DC fan module A 12x1 12x2 Fuse Capacity SMGB0049
102. that the air intake side Rear of the unit is faced directly against a seasonal strong wind Correct Seasonal Wind Correct Seasonal Wind Windbreak Fence Air Intake Sid Rear PX i i i 2500 LAKA NA NS Air Intake Side 4 4 AN C Rear Air Intake Side Incorrect Seasonal Wind Rear KN Va Air Intake Side Rear M y A In this case defrosting time extends E Consideration to Snow B Prevention of Short circuiting Apply an air discharge hood an air intake hood and a For prevention of short circuiting between suction air higher foundation to prevent accumulation of snow on and discharge air apply a field supplied air discharge the air outlet and air inlet hood Correct Incorrect Air Discharge Hood Air discharge gt gt Keep sufficient space Seasonal Seasonal Wind d i Wind P 1500 Air oe c Hood oundation Height wi c AS a consideration to a p RES D snowfall fd H 500 w AS Field supplied gt 300 1 2H Rear side space Service space should be secured NOTE Install the unit on a sunny place such as east or southside of the building rather than north side T SMGB0049 rev 2 08 2010 Outdoor units installation Units installation HITACHI Service Manual Inspire the Next E Concrete foundations
103. the chamber is 60 C to 110 C 1 The gas is inhaled from the inlet port at the outer frame of the fixed scroll 2 The gas inside of the compression space is compressed toward the center of the scroll 3 The compression space is minimum at the center of the scroll and the gas compressed at the maximum is discharged from the outlet port of at the center of the scroll 4 The above procedures Suction Compression Discharge is repeated continuously Gas Rotating scroll Y Compression space Fixed scroll Suction procedure Discharge process 4 Compression process 10 SMGB0049 rev 2 08 2010 261 Scroll compressor Field work instruction Service Manual 11 a Field work instruction Contents 11 Field work instruction 11 1 Checking the power source and the wiring connection HITACHI Inspire the Next 263 264 11 2 Burnt out compressor due to an insufficient refrigerant charge 264 11 3 Insufficient cooling performance when a long piping is applied 265 11 4 Alarm Code 31 265 11 5 Not cooling well due to insufficient installation space for the outdoor unit 266 11 6 Caution with the refrigerant leakage 267 11 6 1 Maximum permissible concentration of the HFC Gas 267 11 6 2 Calculation of the refrigerant concentration 267 11 6 3 Countermeasure for the refrigerant leakage accordi
104. the indoor fan motor is stopped when the forced stoppage input terminals on the outdoor unit PCB1 is short circuited during running However the remote control switch display remains at the same mode with the stoppage code No 10 In this case if the input terminals are opened operation is resumed Setting Example Forced Stoppage at Input 3 between 1 and 2 pins of CN18 3P Connector Outdoor unit PCB1 SS3 Forced stoppage switch CN18 1 1 SS3 Power 2 E 2 source 3 m X1 Control circuit Wiring diagram example of forced stoppage SMGB0049 rev 2 08 2010 71 Outdoor units Available optional H ITACH l functions Inspire the Next Service Manual E Input 3 Demand current control Control function No 6 to 9 In the case that the demand input terminals on the outdoor unit PCB1 are short circuited the compressor frequency is controlled that the maximum limit of the outdoor running current is set 100 80 70 and 60 The maximum limit of the outdoor unit running current can be selected according to the item Setting of external input and output functions If the outdoor unit running current decreases beyond the maximum limit the indoor unit is put under thermo OFF condition The stoppage code No 10 is given When the input terminal is opened during the demand current control its control is reset Setting Example Demand Current Control at Input 3 between 1 and 2 pins of CN18
105. times within one hour 1 The temperature of the thermistor on the top of the compressor is maintained higher than 132 C for 10 minutes 2 The temperature of the thermistor on the top of the compressor is maintained higher than 140 C for 5 seconds 1 gt Is the thermistor on top of compressor normal 1 PCB1 i Yes gt Faulty thermistor Outdoor unit printed circuit board Is the thermistor installed No correctly on the compressor l Yes Is it at cooling or heating mode Heating when the alarm has occurred Install it correctly Cooling Cooling process Y Is the compressor No discharge gas temperature over 132 C De Is the opening of all the operating indoor unit ex valve 10096 Yes ye Remove the sudden changes of the indoor load short path etc or the short path of air between outdoor units 1 Refer to Characteristics of thermistor of Alarm code 23 2 PCB1 Connector No is shown in the below M Heating process t MV1 MV2 MV3 MV4 MVB RAS 8 12FSN2 CN10 CN12 RAS 14 24FSN2 CN10 CN11 CN12 RAS 26 42FSN2 CN10 CN11 CN20 CN12 RAS 44 48FSN2 CN10 CN11 CN20 CN21 CN12 No discharge gas temperature Is the ee over 132 C Ne outdoor unit ex valve 100 Is the opening o
106. to section Troubleshooting in check mode by remote control switch 8 Even if the remote control switches are normal the compressor does not operate under the following conditions Indoor temp is lower than 19 C or outdoor temp Is lower than 5 C during the cooling process DB Indoor temp is higher than 30 C DB or outdoor temp is higher than 23 C WB during the heating process When a cooling or heating process signal is given to the outdoor unit and a different mode as heating or cooling process signal is given to the indoor units When an emergency stop signal is given to outdoor unit SMGB0049 rev 2 08 2010 103 Initial troubleshooting HITACHI Inspire the Next Abnormal operation of the devices Cont Troubleshooting Service Manual Phenomenon Indoor fan speed does not change Cause Failure of the Thermistor Failure of the Discharge Air Temp Thermistor f Disconnected Wire of the Thermistor Check item Check the Thermistor by means of the self check mode 2 Action Turn OFF the main switch Replace or Correctly connect the wiring when it is abnormal Failure of the Remote Control Switch Failure of PCB for the indoor unit Check it by means of the self check mode 1 Replace if it failed Replace if PCB fails Failure of AC chpper for indoor unit Check the indoor unit stoppage when the remote control switch is swicthed OFF
107. to the outdoor unit are not used In forced stopped compressor mode the compressor operation is OFF 1 Make sure that the field selected electrical components main switches circuit breakers wires conduit connectors and wire terminals have been properly selected according to the electrical specifications in this service manual Make sure that the electrical components comply with the National Electrical Code NEC 2 Following the Council Directive 2004 108 EC 89 336 EEC relating to electromagnetic compatibility next table indicates Maximum permissible system impedance Z at the interface point of the user s supply in accordance with EN61000 3 11 MODEL Zmax Q MODEL Zmax O MODEL Zmax 0 RAS 8FSN2 RAS 22FSN2 0 15 RAS 36FSN2 0 11 RAS 10FSN2 RAS 24FSN2 0 15 RAS 38FSN2 0 10 RAS 12FSN2 RAS 26FSN2 0 13 RAS 40FSN2 0 09 RAS 14FSN2 RAS 28FSN2 0 13 RAS 42FSN2 0 08 RAS 16FSN2 0 27 RAS 30FSN2 0 12 RAS 44FSN2 0 08 RAS 18FSN2 0 22 RAS 32FSN2 0 12 RAS 46FSN2 0 08 RAS 20FSN2 0 19 RAS 34FSN2 0 11 RAS 48FSN2 0 07 3 Harmonics situation of each model regarding IEC 61000 3 2 and IEC 61000 3 12 is as follows MODELS SITUATION REGARDING IEC 61000 3 2 MODELS Ssc xx AND IEC 61000 3 12 Ssc xx kVA s RAS 8FSN2 Equipment complying with IEC 61000 3 2 professional use RAS 10FSN2 Equipment comply
108. units FSN2 219 Servicing H ITACH l Service Manual Inspire the Next 1 Remove the front service panel according to Item Removing front service panel 2 High pressure switch pressure sensor fixing position High pressure switch high pressure sensor and low pressure sensor are fixed as shown in the figure RAS 8FSN2 to RAS 12FSN2 High pressure switch PSH1 Low pressure sensor Inverter compressor MC1 High pressure sensor Pd RAS 14FSN2 to RAS 24FSN2 figure for RAS 24 FSN2 High pressure switch PSH2 High pressure switch High pressure switch PSH3 Low pressure sensor Ps High pressure sensor Pd Constant speed compressor MC3 YY MC2 Inverter compressor MC1 High pressure switch high low pressure sensor position SMGB0049 rev 2 08 2010 220 Outdoor units FSN2 Servicing HITACHI Service Manual Inspire the Next RAS 26FSN2 to RAS 42FSN2 figure for RAS 42 FSN2 High pressure compressor PSH4 High pressure High pressure High pressure compressor compressor PSH5 compressor PSH3 PSH2 3 High pressure compressor PSH1 E L 2 i I AU i LN
109. v af V N E Z AUTION Y mo 1 j eo A CAUTIO Aluminum fins have very sharp edges Pay attention B B 9 to the fins in order to avoid any injury E Ww 7 i i NOTE h2 hi 2 a 230 2 Install the outdoor unit on a roof or in an area where n case of no walls at the front and the rear side of the E 2 m t service engineers cannottouch the unit the space of 500mm for the front side and 300mm for the rear side is required When the front wall height is Min 1 500mm extend the distance to the wall more than 500 h2 2 When the rear wall height is Min 500mm extend the distance to the wall more than 300 h1 2 Installation space for single unit When the distance to the obstacle above the unit is a Front side wall height 1500 mm Max 1 500 mm or the space above the unit is closed set up the duct at the air outlet to prevent the short circuit Rear side wall height 500 mm When there are walls around the unit make the vent 2 300 mm hole on the wall When there are obstacles above the unit the four front rear right and left sides of the unit shall be open in principle Install the outdoor unit in a dry well ventilated TNR environment 2 500 mm b Front side wall height gt 1500 mm Install the outdoor unit where the sound or the discharge air from the outdoor unit does not affect Rear side wall height gt 500 mm neighbors or surrounding ventilation The opera
110. were always ON 11 SMGB0049 rev 2 08 2010 265 Insufficient cooling performance when a long piping is applied Field work instruction HITACHI Inspire the Next Service Manual 11 5 Not cooling well due to insufficient installation space for the outdoor unit Example 5 Not Cooling Well due to Insufficient Installation Space for Outdoor Unit Phenomenon Cooling operation was well performed through the intermediate season However the cooling operation was not well available when the outdoor temperature was higher than 35 C Cause As the outdoor units were installed without a sufficient installation space the hot discharge air from other outdoor units was circulated In this case though the outdoor temperature was 35 C the actual suction air temperature was nearly 50 C and Protection System from Excessively High Suction Pressure was activated the frequency of the compressor was decreased and the cooling capacity was also decreased accordingly As the outdoor units in line were installed back to back with a distance of 600 mm between each outdoor unit s back the hot discharged air from other outdoor units was circulated Min 300 mm i Fence p Min 300 mm NE USER Countermeasure To protect the unit from a short circuit fences were mounted at the discharge air side as shown SMGBO0049 rev 2 08 2010 266 Not cooling well due to insufficient installation sp
111. 00 lt Provide a distance of min 1000 mm to the next unit B In case that there is a surrounding wall Installation in the same direction No limit to wall height gt 300 B1 n1 7 LO S R i ER OT dE et INS i Sa T E LEM B aby 3 OOO al pl E PIS 250 ia SESS u ESTY TE ssi en gt 500 900 h2 2 E o oo id i NN aa 5 500 900 82 2 A space of 900 mm is recommended for easier service work 1 h1 Rear side wall height 500 mm 2 h2 Front side wall height 500 mm SMGB0049 rev 2 08 2010 Outdoor units installation 11 HITACHI Inspire the Next Rear to rear installation case 1 Units installation Service Manual No limit to wall height A space of 900 mm is recommended for easier service work gt 500 900 ha 2 Q m Q gt 500 900 h2 2 gt 200 50 OFO 250 2 gt 00 900 h2 2 1 h1 Rear side wall height 500 mm 2 h2 Front side wall height 500 mm Rear to rear installation case 2 No limit to wall height X i LU THT HHT lf gt p A space of 900 mm is recommended for easier service work gt 500 900 M2 2 gt 500 900 P2 2 250 ae 250 O
112. 010 Procedure for checking each main part 187 HITACHI Troubleshooting Inspire the Next Service Manual Additional Information for Check list on compresssor Check item Additional information mechanism of the compressor failure 1 amp 2 3 4 amp 5 The discharge gas temperature Td1 controls the liquid refrigerant return volume to the compressor when only the compressor No 1 is operating If Td1 and Td2 are connected in the reverse order the liquid refrigerant return volume will decrease even if the actual discharge gas temperature is high because PCB1 is checking the wrong compressor temperature Therefore this abnormal overheating process will result in the insulation failure of the motor winding The current sensor performs the overcurrent control the operation frequency control by detecting the current In this case the insulation failure of the motor winding will occur because the control is not available in spite of the actually high current 6 7 The current sensor checks the phase and adjusts the output electrical wave in addition to the above mentioned items If a fault occurs the output electrical wave becomes unstable This generates stress to the motor winding and results in the insulation failure of the motor winding 8 9 During a cooling process the fan speed of the outdoor unit controls the Pd and the MV of each indoor unit controls the Td and the SH During a heating process M
113. 0A Vacuum pump Indoor unit Insulation 11 o o Multi Kit p p fa Liquid line D Gas line SS eceocococo0o0o0oo0cooceoQ Oil trap is recomended at every 10 meters lift 7 NOTE 1 If tools or measuring instruments come into contact with the refrigerant use the tools or the measuring instruments exclusive for R410A 2 If vacuum degree of 756mmbg is not available it is considered that there is a gas leakage Check for any gas leakage once again If no leakage exists operate the vacuum pump for one to two hours SMGB0049 rev 2 08 2010 28 Outdoor units piping installation Piping installation HITACHI Service Manual Inspire the Next 6 To charge refrigerant connect the gauge manifold using charging hoses with a refrigerant charging cylinder to the check joint of the liquid line stop valve 7 Fully open the gas line stop valve and slightly open the liquid line stop valve 8 Charge refrigerant by opening the gauge manifold valve 9 Charge the required refrigerant within the difference range of 0 5kg by operating the system in cooling 10 Fully open the liquid line stop valve after completing refrigerant charge 11 Continue cooling operation for more than 10 minutes to circulate the refrigerant A CAUTION Check for refrigerant leakage in detail If a large refrigerant leakage occurs it will cause difficulty with breath
114. 1 2 RS 1 2 Resistor CB 1 2 3 4 Capacitor T TB1 3 Terminal Board for Power Source TB2 Terminal Board for Transmission CMC1 Magnetic Contactor for Inverter Compressor CMC2 3 Magnetic Contactor for Constant Speed Compressor EF1 2 Fuse for Inverter Compressor EF3 4 5 6 Fuse for Constant Speed Compressor EF11 12 13 14 Fuse for Fan Module FFB3 Circuit Breaker for Constant Speed Compressor SMGBO0049 rev 2 08 2010 Outdoor units FSN2 245 HITACHI 2 Inspire the Next Service Manual RAS 26FSN2 to RAS 42FSN2 380 415V 50Hz 380V 60Hz Front side Main The interior of the electrical control box Main B eT Ts a S 3 g O 3 TE rm A Portion i NF3 i U cmc CB3 cB4 PNG EH cel Middle RUP PCBI H d SR part of we pee NH holder l E DM d Te EF 12 ae m m TB1 FANMI H CB1 f p S i PCB Fixing Holder 10 i i L CB2 i A RAS 38 42FSN2 Front side A
115. 16RS PSC A1T viii Description Energy recovery ventilation units Econofresh kit Description Remote control switch with timer Central control Centralized ON OFF controller Programmable timer Code 70600001 70600002 70600003 70600004 70600005 70600107 7E774148 Code 70510000 60291479 60291484 60291482 Figure Figure Model codes Service Manual SMGB0049 rev 2 08 2010 Model codes Service Manual Name PC LH3A PC ARH PC ALH PC ALHD PC ALHZ PC ALHC PSC 5HR PCC 1A PRC 10E1 PRC 15E1 PRC 20E1 PRC 30E1 THM R2AE HC A32MB HC A16KNX Description Wireless remote control switch Optional remote controller Receiver kit for RCI FSN2E on the panel Receiver kit for RCD FSN2 on the panel Receiver kit for RCI RCD RPC RPI RPK RPF I FSN2 E on the wall Receiver kit for RCIM FSN2 on the panel H LINK relay Optional function connector 2 pin extension cord 2 pin extension cord 2 pin extension cord 2 pin extension cord Remote temperature sensor THM4 Building Management System Gateway to MODBUS systems Building Management System Gateway to KNX systems Code Figure 60291056 HITACHI Inspire the Next 60291486 60291464 200 49 y ag 60291467 augu 60291473 60291476 Image not available 60291105 60199286 Z n 7E790211 7E790212 7E790213 1 is
116. 22mm RAS 42FSN2 77 22 mm RAS 44FSN2 79 22 mm RAS 46FSN2 84 22 mm RAS 48FSN2 89 22 mm NOTES 1 Follow local codes and regulations when selecting field wires 2 The wire sizes marked with O in the table of this page are selected at the maximum current of the unit according to the European Standard EN60 335 1 Use the wires which are not lighter than the ordinary tough rubber sheathed flexible cord code designation HO5RN F or ordinary polychloroprene sheathed flexible cord code designation HOSRN F 3 The wire sizes marked with in the table of this page are selected at the maximum current of the unit according to the wire MLFC Flame Retardant Polyflex Wire manufactured by Hitachi Cable Ltd Japan 4 Use a shielded cable for the transmitting circuit and connect it to ground 5 In the case that power cables are connected in series add each unit maximum current and select wires below 6 The earth cable size complied with local code IEC 245 N 577 Selection according to EN60 335 1 ik pasan E nr Current i A Wire Size mm Current i A Wire Size mm Is6 0 75 1x15 0 5 6 is10 1 15 is 18 0 75 10 is 16 1 5 18 lt i lt 24 1 25 16 lt i lt 25 2 5 24 lt i lt 34 2 25 lt i lt 32 34 lt i lt 47 3 5 32 lt i lt 40 47 is 62 5 5 40 is 63 10 62 is78 8 63 i 78 is 112 14 112 is 147 22 Sield part amp
117. 30 opening 0 100 from 0 to 63 I r oa LL b uf L SMGB0049 rev 2 08 2010 Troubleshooting procedure 167 HITACHI Inspire the Next Troubleshooting Service Manual No Item Values Units J 11 J LOLUL Indoor unit heat exchanger 31 liquid pipe temperature freeze 62 127 oC protection from 0 to 63 oe ee J IL J Lt ml rr pt pt Indoor unit heat exchanger gas 32 pipe temperature 62 127 C from 0 to 63 I bt ml rr ri pt pt Lt Indoor unit air inlet temperature i 33 from 0 to 63 HR TE C ro Lt ml al 171 ri LULI Lt Indoor unit discharge air 34 temperature 62 127 C from 0 to63 ro Lt ml Vir No 0 Unit PIE 6 160 Indoor unit capacity setting m 35 from 0 to 63 x1 8HP r3 No 63 Unit jt 2 I 6 160 06001 No 0 Unit LU 0 99 36 Indoor unit cause of stoppage from 0 to 63 No 63 Unit jo a ou t 0 99 37 Pressure ratio fall protection ya O not in operation degeneration control I I Imt 1 in operation 38 High pressure rise protection 0 not in operation degeneration control 4 in operation Inverter fin temperature d not in peration 39 increase protection H l i p f 1 in operation degeneration control SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting S
118. 40V is not detected in A or B during inverter compressor stoppage When outdoor AC fan motor is stopped and ITO opens for 5 seconds or shorter the alarm is indicated The alarm is also indicated if AC fan motor is faulty when using snow sensor Is AC220V or AC240V applied between terminal 3 of PCN2 PCN16 PCN17 PCN18 PCN52 and faston terminal N1 on PCB1 during the stoppage No Faulty PCB1 Is AC220V or AC240V applied No between terminal 3 of PCN14 on PCB1 and the fasten terminal N1 on PCB1 during the stoppage Yes PCB1 is normal Yes Check wiring system connecting to PCN14 and PCN2 PCN16 PCN17 PCN18 and PCN52 on PCB1 Indication on the display of the outdoor unit PCB1 i H Abnormality internal thermostat for AC fan motor ITO2 ITO4 LI H Abnormality pressure switch for number 1 compressor protection PSH1 UE H Abnormality pressure switch for number 2 compressor protection PSH2 ni DUE rn PUR DUK Abnormality pressure switch for number 3 compressor protection PSH3 Lu C Abnormality pressure switch for number 4 compressor protection PSH4 Lt n Li Lt H Abnormality pressure switch for number 5 compressor protection PSH5 Action Phenomenon Cause Check item Turn OFF Main Switch Starting outdoor un
119. 7942 60277942 60277941 60277942 60277943 60277944 60277945 60277946 RPF Floor Enclosure Unit RPF 1 0FSN2E RPF 1 5FSN2E RPF 2 0FSN2E RPF 2 5FSN2E Code 7E450001 7E450002 7E450003 7E450004 Model codes Service Manual Floor Concealed Enclosure Unit RPFI 1 0FSN2E RPFI 1 5FSN2E RPFI 2 0FSN2E RPFI 2 5FSN2bE Code 7E460001 7E460002 7E460003 7E460004 RPF 2 0 RPFI Model codes Service Manual Unit RAS 8FSN2 RAS 10FSN2 RAS 12FSN2 Code 60288134 60288135 60288136 Unit RAS 14FSN2 RAS 16FSN2 RAS 18FSN2 RAS 20FSN2 RAS 22FSN2 RAS 24FSN2 L EL BL Meaning of model codification Unit Type Outdoor Unit FSN2 OUTDOOR UNITS Code 60288137 60288138 60288139 60288140 60288141 60288142 Compressor power HP 8 48 Set Free System R410 A refrigerant Series Unit RAS 26FSN2 RAS 28FSN2 RAS 30FSN2 RAS 32FSN2 RAS 34FSN2 RAS 36FSN2 RAS 38FSN2 RAS 40FSN2 RAS 42FSN2 RAS 14 FS Code 60288143 60288144 60288145 60288146 60288147 60288148 60288149 60288150 60288151 Inspire the Next Unit RAS 44FSN2 RAS 46FSN2 RAS 48FSN2 SMGB0049 rev 2 08 2010 yii HITACHI Code 60288152 60288153 60288154 0 HITACHI Inspire the Next Complementary systems Name KPI 502E1E KPI 802E1E KPI 1002E1E KPI 1502E1E KPI 2002E1E KPI 3002H1E EF 5NE List of accessories Name PC ART PSC A64S PSC A
120. 7E790214 7E299907 quen 7E513200 D SMGB0049 rev 2 08 2010 lt A ix NEW 7513300 D 0 HITACHI Inspire the Next Name HARC BXE A HARC BXE B HC A64BNP CSNET WEB v3 TS001 WEB SCREEN PC A 110 HC A160SMS DBS 26 P N23WA P N23WAM P N23DWA P N46DWA Description Buildin g Management System Gateway to LONWORKS systems max 64 IU 8 parameters Building Management System Gateway to LONWORKS systems max 32 IU 16 parameters Building Management System Gateway to BAC Net system Control System 15 inch touch screen display Integration of teams into H LINK SMS alarm warning device Drain discharge connection Air panel for RCI FSN2E Air panel for RCIM FSN2E Air panel for RCD FSN2E Air panel for RCD FSN2E SMGB0049 rev 2 08 2010 Code 60290874 60290875 60291569 7E891938 7E891935 7E519000 7E519100 60299192 70530000 60197160 60291574 60291575 Model codes Service Manual Model codes Service Manual Name B 23H4 F 23L4 K F 23L4 D F 46L4 D PDF 23C3 PDF 46C3 OACI 232 PD 75 PI 23LS5 TKCI 232 MW 102AN MW 162AN MW 242AN MW 302AN MH 84AN MH 108AN Description Adapter for deodorant filter Antibacteria filter Deodorant filter Deodorant filter Duct connection flange Duct connection flange Fresh air intake kit Fresh air intake kit 3 way outl
121. 89 199 36 304 214 38 323 244 40 340 254 42 357 264 44 374 271 46 391 281 48 408 291 Converted frequency of constant speed compressor Outdoor unit capacity Power supply frequency Hz HP MC2 MC3 MC4 MC5 14 16 50 18 20 50 50 22 24 50 77 26 28 77 77 30 36 77 77 50 38 42 77 77 50 77 44 48 77 77 77 77 7 NOTE The maximum frequency for the 8 to 48HP outdoor unit is indicated as Inverter frequency converted frequency of constant speed compressor SMGB0049 rev 2 08 2010 Outdoor units 77 Available optional functions HITACHI Inspire the Next Service Manual E Cancellation of outdoor ambient temperature limit of heating Pty Press PSW1 and select the setting condition 1 at the cancellation of outdoor ambient temp limit of heating 1 1 Then this function can be set The heating operation is continued under a high outdoor temperature Operation in heating mode The factory set limitation of the range of permissible outdoor temperature in the heating pro cess which is shown in the right figure is cancelled 27 25 Area of operation stoppage Suction air temperature C 0 17 19 29 Outdoor Temp C NOTE The operation may be OFF due to high outdoor temperature protection control since protection control is not cancelled E Canc
122. A 8HP 48HP U42B 8HP 48HP CHECK VALVE U42C 14HP 48HP U51 8HP 48HP 9710 PROPELLER FAN U55 8HP 48HP OIL SEPARATOR ASS Y U58 8HP 48HP RECEIVER ASS Y U62 U62A 8HP 48HP NF1 U62B 14HP 48HP NF2 NOISE SUPPRESSOR U62C 14HP 48HP NF3 U65A 8HP 48HP U65B 8HP 48HP U65C 8HP 48HP U65D 8HP 48HP U65E 14HP 48HP PLASTIC MATERIAL U65F 8HP 48HP U65G 8HP 12HP 14HP 48HP FOR THERMISTOR TA U65H 8HP 12HP FOR THERMISTOR TA U70 8HP 12HP E656DHD 65D2Y U70A 14HP 48HP E656DHD 65D2Y INVERTER U70B 14HP 24HP E656DH 65D2Y COMPRESSOR 26HP 48HP E1000GH 100D2Y U70C 30HP E656DH 65D2Y U71 30HP 42HP 0 81KW DC U71A 8HP 24HP 0 81KW DC MOTOR U71B 26HP 48HP 0 3KW AC U72 26HP 48HP FOR INV COMP U72A 8HP 12HP FOR INV COMP MC1 U72B 14HP 48HP FOR CONSTANT SPEED COMP MC2 U72C 14HP 48HP FOR CONSTANT SPEED COMP MC3 MAG CONTACTOR U72D 18HP 48HP FOR CONSTANT SPEED COMP MC4 U72E 30HP 48HP FOR CONSTANT SPEED COMP MC5 U72F 38HP 48HP FOR FAN U74A 44HP 48HP RS U74B 8HP 48HP R1 RESISTOR U74C 8HP 48HP R2 U77A 8HP 12HP SVF SVA SVB 14HP 28HP SVF SVA1 2 SVB SVG 30HP 48HP SVF SVA1 2 3 4 SVB SVG SOLENOIDAVALVE U77B 8HP 48HP SVC SMGB0049 rev 2 08 2010 RAS 14 48FSN2 Electrical equipment 199 HITACHI Inspire the Next Spare parts Service Manual RAS 14 48FSN2 Electrical equipment N
123. Abnormal high pressure sensor Check the connectors for PCB Replace the pressure sensor if faulty Excessively high air inlet temp of the indoor unit and the outdoor unit Incorrect connection between indoor unit and outdoor unit Check the thermistor for inlet air temp of the indoor unit and the outdoor unit Check electrical system and ref cycle Replace the thermistor if faulty Correctly connect Locked Ex valve with fully closed opening Check the connector for PCB1 Repair connector for PCB or ex valve Replace it if faulty Stoppage of the indoor fan wall type 1 0 to 3 0 only Blown out fuses Check the continuity of fuses Replace the fuses Faulty PCB Replace PCB and check the operation Replace PCB if faulty SMGB0049 rev 2 08 2010 149 Troubleshooting procedure f Troubleshooting HITACHI Inspire the Next Service Manual Alarm code Description Activation for protecting the system from excessively low suction pressure protection from the vacuum operation E W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when a suction pressure is lower than 0 09 MPa for over 12 m
124. B2 marks on the PCB2 look upside down but this is the correct position 2 Identify the terminal Nos with the mark band Nos when reassembling If incorrectly connected malfunction or damage will occur 3 Check to ensure that the electrical wires will not be caught between the mounting electrical components and the mounting plates when the PCB2 is remounted 4 Apply silicon grease evenly on the whole rear side of the diode module and the transistor module when mounting Use Silicon grease provided as accessory service parts No P22760 Diode Module Fixing screws M5 Screws for PCB2 M3 Screws M5 Fixing screws for PI transistor module M4 Screws M5 LED201 Screws M5 Fixing screws for transistor module M4 Screws for PCB M3 SMGB0049 rev 2 08 2010 Outdoor units FSN2 5 screws M5 249 Fixing screws M5 HITACHI Inspire the Next E Removing fan module Before this work remove the service panel according to the item Removing Front Service Panel Check to ensure that LED201 Red of the PCBS is off Disconnect all the wirings connected to the fan module as shown below 1 Disconnect the wirings of the connector of CN201 CN202 and CN203 from the fan module 2 Disconnect wirings of R S T U V W on the fan module 3 Remove five 5 screws fixing the fan module so that the fan module can be removed TB3 T TB6 W SMGB0049 rev 2 08 2010 250
125. CHI Inspire the Next Use the OK switch of the remote control in the following cases dew Mey pue HEE Sy 1 When the RUN LED is flickering HEAT US ADDS PRN HR t RN DRY A C ci SeRVICE ASNO FERES 2 To trace back the cause of the malfunction after restarting from the stoppage AUTO VENTIHSTRG HIE TRUNICHEK while the RUN LED is flickering a 3 To check during the normal operation or during the stoppage 4 To monitor the inlet air temperature and the discharge air temperature nan vang TIMER 4t VENTI LOUVER DAY SCHEDULE Check mode Normal mode immediately before the failure will be gt Check mode 1 Current data will be displayed OQ O Mise Check mode 2 The data which was held displayed NOTES The indication will delay as the transmission between the remote control switch and the indoor unit takes about ten seconds All the data may be displayed as FF or i or 255 These transient data which are produced temporarily by the software do not affect the device Bd as N functions at all The alarm code may also be displayed as FF seconds Ifitis not indicated check mode 1 it has possibilities that the transmission between remote control switc
126. CHI 2 Inspire the Next Service Manual Remove the front service panel according to the item Removing Front Service Panel RAS 8FSN2 to RAS 12FSN2 ll Removing Solenoid Valve 1 Collect the refrigerant from the check joint 2 Remove the solenoid valve coils according to the item Removing Solenoid Valve Coil 3 Remove the brazing at the following portions Solenoid Valve SVA1 to 5 2 brazing portions for each valve Solenoid Valve SVB 2 brazing portions Solenoid Valve SVC 2 brazing portions Solenoid Valve SVG 2 brazing portions Only for RAS 14FSN2 to RAS 48FSN2 a When removing brazing cover the solenoid valve with wet cloth for cooling b Pay attention not to burn the connecting wiring and piping insulation while brazing 4 Reassemble the solenoid valve in the reverse procedure for removing Detailed figures Brazing Removing Portion SVA1 Brazing Removing i Portion SMGB0049 rev 2 08 2010 226 Outdoor units FSN2 HITACHI Inspire the Next Servicing Service Manual RAS 14FSN2 to RAS 24FSN2 figure for RAS 24FSN2 9 gt n t F a Sa ui X CN C es C o
127. CIM RCD a um 1 Meaning of model codification RPI 3 0 FS Unit Type Indoor Unit RCI M RCD RPC RPI RPK RPF I Compressor power HP 1 0 6 0 H Link Set Free System Free R410 A refrigerant Series E Made in Europe Made in Malaysia HITACHI Inspire the Next Please check by model name your air conditioner type its abbreviation and reference number in this service Ceiling Unit Code RPC 2 0FSNE 7E440003 RPC 2 5FSN2E 7E440004 RPC 3 0FSN2E 7E440005 RPC 4 0FSN2E 7E440007 RPC 5 0FSN2E 7E440008 RPC 6 0FSN2E 7E440009 RPC SMGB0049 rev 2 08 2010 v 0 HITACHI Inspire the Next Unit RPI 0 8FSN2E RPI 1 0FSN2E RPI 1 5FSN2E RPI 2 0FSN2E RPI 2 5FSN2E RPI 3 0FSN2E RPI 4 0FSN2E RPI 5 0FSN2E RPI 6 0FSN2E RPI 8 0FSN2E RPI 10 0FSN2E FSN 2 E INDOOR UNITS Duct Code Unit Code RPK 1 0FSNH2M 7E420000 RPIM 0 8FSN2E 7E420001 RPIM 1 0FSN2E 76430001 7E420002 RPIM 1 5FSN2E 7E430002 7E420003 7E420004 7E420005 7E420007 7E420008 7E420009 7E420010 7E420011 RPI RPIM Wall Unit 7E430000 RPK 1 5FSNH2M RPK 1 0FSN2M RPK 1 5FSN2M RPK 2 0FSN2M RPK 2 5FSN2M RPK 3 0FSN2M RPK 4 0FSN2M RPK A se1 Meaning of model codification Unit Type Indoor Unit RCI M RCD RPC RPI RPK RPF l Compressor power HP 0 8 10 0 H Link Set Free System Free R410 A refrigerant Series E Made in Europe Made in Malaysia SMGB0049 rev 2 08 2010 Code 6027
128. CN207 on PCB2 CN201 CN203 faston terminal U V W on fan module and trunk connector CN52 CN54r 4 Are the connectors abnormal gt Faulty Remove the foreign matter Replace the DC fan motor Good Connect it correctly PCB1 Control PCB in Outdoor Unit PCB2 Inverter PCB Yes gt Restart operation v E Does the DC motor run gt gt Yes Restart operation Yes This is normal No Does the DC motor run gt gt No Alarm code is not indicated This is normal Replace the PCB1 or the fan controller In the case that the fan motor does not run even the PCB1 is replaced replace the PCB2 SMGB0049 rev 2 08 2010 Troubleshooting procedure 157 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description re Lr Compressor protection W This alarm code is displayed when one of the following alarms occurs three times within six hours If the outdoor unit operates continuously without removing the cause of the alarm the compressor may be seriously damaged Alarm Code Content of Abnormality 3 ni X Tripping of the protection device in the outdoor unit D d Decrease in the discharge gas superheat al Li X m n Increase in the discharge gas temperature DUK ma
129. DC VCC05 GND1 5VDC VCC12 GND1 12VDC VCC15 GND1 15VDC VCC24 GND1 24VDC VCC12T GND1 12VDC SMGB0049 rev 2 08 2010 120 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description ri H Abnormal transmission between Inverter PCB and Outdoor Unit PCB W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm is displayed when the abnormal operation is maintained for 30 seconds after the normal transmission between the outdoor unit PCB1 and PCB2 and also abnormality is maintained for 30 seconds after the micro computer is automatically reset The alarm is displayed when the abnormal transmission is maintained for 30 seconds from the starting of the outdoor unit Alarm code 04 is indicated when transmission between inverter and fan controller is abnormal Is LED2 Green on PCB1 Yes flickering Disconnect CN14 of PCB1 NS Y Check the wiring between PCB1 and PCB2 In case of 04 check the wiring between inverter and fan controller Is LED2 Green on PCB1 Yes flickering Qv Faulty PCB1 Check PCB2 In case of 04 check fan con
130. EM Alternatively 000 0 0 0 0 0 0 0 0 0 0 0 0 00000000 LL Indoor Unit with Auto gt Stop of Louver AUTO LOUVER Power to Y52C1 Y52C5 Power to Stop or g OFF CMC1 CMC5 OFF MGI MO LU see Stop of gt MOF1 MOF4 Power to CH1 ON Power to M CH2 CH5 ON Discharge Air Temp Rejection i gt 50 C Operation Slow indoor fan speed Heat I U Discharge Air Temp 40 C Power to i gt MIF OFF Shorter than 2 min Operation at Slow Speed Y After 2 min RUN STOP Lamp OFF COOL Set Fan Speed amp Set Temp indication Continuously ON Electronic Ex Valve in I U STOP a and O U Fixed opening LCD indication OFF Resetting of Timer Defrosting Power to L U OFF gt Power to PCB in I U OFF Power to PCB in O U OFF Power to O U OFF SMGB0049 rev 2 08 2010 Power to CH1 CH5 OFF Standard operation sequence Control system Service Manual Heating Operation Heating Operation Time 40 minutes or above Defrosting Operation je Small Temperature difference between Outdoor temperature Ta and evaporating temperature Te at heat exchanger Big DEFROST on LCD HITACHI Inspire the Next appears according to indoor heat load R
131. FSN2 O RAS 14 and 16FSN2 O O 3 RAS 18 to 28FSN2 O O O RAS 30 to 36FSN2 O O O RAS 38 to 48FSN2 O O O O Abnormality of PSH4 Abnormality of PSH5 SMGB0049 rev 2 08 2010 Troubleshooting procedure 115 HITACHI Inspire the Next Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch discharge pressure Activation of the high pressure switch due to the excessively high Insufficient air flow to the heat exchanger Outdoor heat exchanger during the cooling process or indoor heat exchanger during the heating process Check the heat exchanger for dust or for clogging Check the air filter for dust Remove the dust or the clogging Remove the dust Check for any obstacles at the inlet or the outlet of the heat exchanger Remove the obstacles Check the service area Secure service area Check the speed Outdoor Fan Cooling Indoor Fan Heating Replace the fan motor if faulty Malfunction of the expansion valve Disconnected of the Connector Fix the looseness or reconnect the connector Fully closed and locked Replace the expansion valve Excessively high temp air to the Indoor Unit Heat Exchanger Calculate the heat load Reduce the heat load or use a bigger unit Check for hot air near the ceiling Heating Provide good circulation Check for short circuited air Heating Re
132. Faulty fan motor Replace fan motor Yes No Is pulse signal to Yes i PCB correctly 4 Faulty PCB No Replace it Faulty fan motor Replace it 3 Disconnect PCN15 on PCB when performing If 1V or over is applied between PCN15 5 and VDC on PCB for 10 sec Approx after starting operation the fan motor is normal Note Even when the operation is stopped 0 3 to 0 4V may be applied The voltage may not be conducted sequentially after 10 sec to perform the above operation H 4 With PCN15 on PCB connected if a few volts are applied between VDC and PC4 2 terminal on PCB the PCB is normal Note Even when the operation is stopped 0 2V Approx may be applied SMGB0049 rev 2 08 2010 Troubleshooting procedure Faulty PCB c Replace PCB PCB Indoor Unit PCB RCI Model Electrical Box Troubleshooting HI ITACHI Service Manual Inspire the Next Alarm code Description H Activation of the protection device for the indoor fan motor RPK W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is indicated when the following conditions occurs three times in 30 minutes Indoor fan rotat
133. HITACHI Inspire the Next SET FREE SERIES FSN2 Service manual Outdoor Units RAS 8 48 FSN2 Contents Service Manual Contents HITACHI Inspire the Next Model codes and descriptions Units installation Piping installation Electrical wiring Control system Available optional functions Test run Troubleshooting Spare parts Servicing Main parts Field work instruction SMGB0049 rev 2 08 2010 i ON OT BPW YN OQ H ITACH i Contents Inspire the Next Service Manual Contents 0 Model codes and descriptions V 1 Units installation 1 1 1 General installation notes 2 1 2 Transportation and handling 4 1 2 1 Hanging method 4 1 2 1 Center of gravity 7 1 3 Outdoor units installation 8 1 3 4 Before installation 8 1 3 2 Installation location 9 1 3 8 Serial units installation 10 1 3 4 Multiple installation space 11 1 3 5 Foundations 15 2 Piping installation 17 2 1 Piping work considerations 18 2 1 1 X Copper pipes and sizes 18 2 1 2 Three principles on refrigerant piping work 21 2 1 3 Suspension of refrigerant piping 21 2 1 4 Tightening torque 22 2 1 5 Brazing work 23 2 2 Outdoor units piping installation 24 2 2 1 Factory supplied accessories 24 2 2 2 Position of piping connections 25 2 2 3 Flange piping connection 26 2 2 4 Piping connection 27 2 2 5 Vacuum and refrigerant charge 28 2 2 6 Drain discharging boss 29 3 Electrical wiring 31 3 1 General c
134. I temperaturel C i I 10 Defrosting operation 10 Defrosting operation start area start area 21 E SLo defrost setting Press PSW1 and select the setting condition 1 at the slow defrost setting dui Indoor fan operation is stopped during the defrost operation However this function can be operated the indoor fan at 5 low speed during the defrosting operation E Long piping setting Press PSW1 and select the setting condition 1 at the long piping setting rH If cooling capacity or heating capacity is not enough under the long distance piping condition this function can be set the target compressor frequency higher than normal target value B Low noise setting Press PSW1 and select the setting condition 1 so the low noise setting lE can be set The outdoor fan maximum rotation is set lower than normal setting regardless of outdoor temperature However continuous operation can not be operated under the condition below a Outdoor temperature is over 40 C b Total combination horsepower is over 100 SMGB0049 rev 2 08 2010 79 Outdoor units HITACHI Inspire the Next E Fixing of demand function Available optional functions Service Manual u AT Press PSW1 and select the setting condition 1 so that the fixing of demand function zz can be set However it is not necessary to short circuit the demand input terminals on the outdoor unit PCB Re
135. IODE MODULE U19 14HP 48HP FOR CONSTANT COMP CT SENSOR CURRENT TRANSFORMER U21A 8HP 48HP MVB EXP VALVE U21B 8HP 48HP MVB COIL FOR EXP VALVE U21C 8HP 12HP MV1 14HP 24HP MV1 MV2 26HP 42HP MV1 MV2 MV3 PEDE 44HP 48HP MV1 MV2 MV3 MV4 U21D 8HP 48HP MV1 U21E 14HP 48HP MV2 Tat 2HP AHP MV COIL FOR EXP VALVE 44HP 48HP MV3 MV4 U27A 8HP 3 4 GAS 10HP 7 8 GAS 12HP 14HP 1 1 GAS 16HP 24HP 1 1 8 GAS 26HP 34HP 1 1 4 GAS 36HP 48HP 1 1 2 GAS eee U27B 8HP 10HP 3 8 LIQUID 12HP 16HP 1 2 LIQUID 18HP 24HP 5 8 LIQUID 26HP 48HP 3 4 LIQUID U28A 8HP 48HP PGC JOINT U28B 8HP 48HP CHECK JOINT iog SMGB0049 rev 2 08 2010 Spare parts Service Manual HITACHI Inspire the Next Number nets Remarks Part name U30A 8HP 48HP U30C 8HP 48HP U30D 8HP 48HP STRAINER U30E 8HP 48HP U30F 26HP 48HP U32A 8HP 12HP 14HP 48HP FOR INV COMP U32B 8HP 12HP VIBRATION ABSORBER 14HP 48HP FOR CONSTANT COMP U32C 14HP 48HP U34A 8HP 48HP OUTLET U34B 8HP 48HP INLET LEFT SIDE U34C 8HP 48HP INLET RIGHT SIDE AIR GRILLE U34D 8HP 48HP INLET BEHIND U34E 26HP 48HP INLET BEHIND U40A 8HP 48HP CONDENSER ASSEMBLY U40B 8HP 12HP PLATE HEAT EXCHANGER 14HP 48HP CONDENSER ASSEMBLY U40C 14HP 24HP PLATE HEAT EXCHANGER 26HP 48HP CONDENSER ASSEMBLY U40D 26HP 48HP PLATE HEAT EXCHANGER U42
136. If the fuses are blown out or a breaker is activated investigate the cause of the overcurrent and take the necessary action Phenomenon Cause Action Check ltem Turn OFF the main switch Power failure or power is not ON Measure the voltage by means of the voltmeter Supply the power Short circuit supplied between the wires Remove the cause of the short circuit and replace the fuse Check for any uncovered part of the wires Short circuit of the wires to earth Remove the cause of the short circuit and replace the fuse Measure the insulation resistance Blown out fuse or activation of Ine breaker atthe power source Failure of indoor unit fan motor Measure resistance between wires and insulation resistance Replace AC chopper for indoor unit fan fan motor and fuse Failure of AC chopper for indoor fan Replace AC chopper for indoor unit fan and fuse Short circuit supplied between the wires Remove the cause of the short circuit and replace the fuse Check for any uncovered part of the wires Short circuit of the control circuit to earth Blown out fuse at the control Remove the cause of the short circuit and replace the fuse Measure the insulation resistance circuit Failure of indoor unit fan motor Measure resistance between wires and insulation resistance Replace AC chopper for indoor unit fan fan motor and fuse Failure of AC chopper for indoor fan
137. Jieleimm O In the case that current exceeds 63A use MLFC cables and do not connect cables in series A CAUTION Install a multi pole main switch with a space of 3 5 mm or more between each phase Transmission wires Power supply wires Earth screw Use shielded wires for transmission wires between the indoor and the outdoor units and connect the shielded part to the earth screw in the electrical box of the indoor unit as shown in the figure SMGB0049 rev 2 08 2010 Wire size Electrical wiring Service Manual Bl Select the Main Switches in accordance with the following table HITACHI Inspire the Next Indoor units Model Power Source ae curate aN ing CB A ELB no poles A mA All indoor units 5 0A 6 1 230V 50Hz 2 40 30 RPI 8 0 10 0 FSN2E 10 0A 16 Outdoor units Model Power Source ESRC TAL ing CB A ELB no poles A mA RAS 8FSN2 12 15 4 20 30 RAS 10FSN2 15 20 4 20 30 RAS 12FSN2 20 30 4 30 30 RAS 14FSN2 22 30 4 30 30 RAS 16FSN2 25 30 4 40 30 RAS 18FSN2 29 40 4 40 30 RAS 20FSN2 34 40 4 50 100 RAS 22FSN2 39 50 4 50 100 RAS 24FSN2 43 50 4 60 100 RAS 26FSN2 44 60 4 60 100 RAS 28FSN2 3 380 415V 50Hz 48 75 4 75 100 RAS 30FSN2 51 75 4 75 100 RAS 32FSN2 54 75 4 75 100 RAS 34FSN2 58 75 4 75 100 RAS 36FSN2 62 75 4 100 100 RAS 38FSN2 67 75 4 100 100 RAS 40FSN2 74 100 4 100 100 RAS 42FSN2 77 100 4
138. Make sure that MV1 to CN10 MV2 to CN11 MV3 to CN20 and MVB to CN12 are correctly connected 9 Are the ex valves coils MV1 MV2 MV3 and MVB correctly mounted Make sure that each coil is correctly mounted on the valve 10 Are the refrigerant cycle and electrical wiring system incorrectly connected Make sure that the refrigerant is flowing into the indoor units by operating one refrigerating cycle only from the outdoor unit 11 Is the opening of ex valve completely closed locked Check the following by means of the check mode of the outdoor unit 1 Liquid pipe temp TL Inlet air temp Ti during the cooling process 2 Liquid pipe temp TL gt Inlet air temp Ti during the heating process 12 Is the opening of ex valve fully opened locked Make sure that the liquid pipe temp is lower than the inlet air temp of the stopped indoor unit when other indoor units are operating under the cooling process 13 Are the contacts for the comp magnetic switch CMC faulty Check the surface of each contact L1 L2 and L3 in a visual inspection 14 Is there any voltage malfunction among L1 L2 L2 L3 and L3 L1 Make sure that the voltage imbalance is smaller than 396 Note that the power source voltage must be within 380V or 415V 10 15 Is the comp oil acidified during the burning of the compressor motor Make sure that the oil color is not black SMGB0049 rev 2 08 2
139. Ms refrigerant cycle setting on outdoor unit PCB1 and Set them correctly different indoor unit PCB Combination Refrigerant Cycle No Setting Setting Switch F Combined Indoor Unit R Combined Indoor Unit 10 digit J digit Outdoor unit Outdoor unit MEE eting Postion model Total Total capacity model Total Total capacity 123456 Setby inserting quantity 1 HP quantity 1 HP TRS into the groove RAS 8FSN2 2 13 4 0 10 4 RAS 30FSN2 2 32 15 0 39 0 Outdoor Unit DSW1 RSW1 RAS 10FSN2 2 16 5 0 13 0 RAS 32FSN2 2 32 16 0 41 6 Indoor Unit mcm RSW RAS 12FSN2 2 16 6 0 15 6 RAS 34FSN2 2 34 17 0 44 2 H LINK 11 RAS 14FSN2 2 20 7 0 18 2 RAS 36FSN2 2 34 18 0 46 8 RAS 16FSN2 2 20 8 0 20 8 RAS 38FSN2 2 38 19 0 49 4 Ex Ifi Case or Seting Refrigerant CycisNo vo RAS 18FSN2 2 20 9 0 23 4 RAS 40FSN2 2 38 20 0 52 0 ON wae ITE OFF e ko RAS 20FSN2 2 20 10 0 26 0 RAS 42FSN2 2 42 21 0 54 6 123456 ITA RAS 22FSN2 2 20 11 0 28 6 RAS 44FSN2 2 42 22 0 57 2 TONo eh Ser DIBINSEE RAS 24FSN2 2 27 12 0 31 2 RAS 46FSN2 2 46 23 0 59 8 iow di DSW and RSW setting before shipment is 0 RAS 26FSN2 2 29 13 0 33 8 RAS 48FSN2 2 46 24 0 62 4 Maximum in setting refrigerant cycle No is 63 RAS 28FSN2 2 31 14 0 36 4 SMGB0049 rev 2 08 2010 142 Troubleshooting procedure Troubleshooting HITACHI Service Manual Inspire the Next Alarm code Description 4 Incorrect indoor number setting W The RUN LED flickers and ALARM
140. No Use a tester 15V for PCB Faulty PCB a correctly 4 Replace PCB p Is fan motor speed control command to fan Yes Faulty PCB motor correctly 5 5 Disconnect CN550 on PCB when performing If 2V or over are applied between CN550 5 to CN550 3 on PCB for 10 sec Approx after i No starting operation the PCB is normal Note The voltage may not be conducted squen tially after 10 sec to perform the above operation Faulty fan motor Replace it SMGB0049 rev 2 08 2010 135 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description V E Activation of the protection device for the indoor fan motor except RCI and RPK 120 C or 135 C 120 C RPC and RPI Except for 5 0HP 135 C RCD RPF I and RPI 5 0HP only W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the temperature of the internal thermostat for the indoor fan motor is higher than PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Yes Dass the Is the continuity present at
141. Principle of compression 261 SMGB0049 rev 2 08 2010 251 10 HITACHI Inspire the Next 10 1 Inverter Main parts Service Manual Aplicable model RAS 8 48FSN2 Aplicable power source 3 Phase 380V 415V 50 Hz Output voltage 380 415V Output current 25A Time rating Continuous Control method Vector PWM Control Range Output Frequency 20 115Hz Accuracy of Frequency 0 01 Hz at applicable frequency range Accuracy of output voltage 10 at applicable frequency range Output Characteristics Conditions 1 Power Source Voltage AC380 415V 2 Non Loading Free Output 3 Ammeter Type Volt Meter X1 1 200 100 Refer to the note in next page Soft start stop 0 125Hz S 0 25HZS 0 5Hz S 1Hz S 3Hz S 5 steps Protection function Excessive high or low voltage for Inverter Abnormality of current sensor Excessive Low Voltage at a voltage is lower than 350V DC Excessive High Voltage at a voltage is higher than 750V DC Stoppage at a current of compressor smaller than 1 5A Cause of Abnormality Failure of Current Sensor Failure of Transistor module Failure of Compressor Disconnected Wiring SMGB0049 rev 2 08 2010 252 Inverter Main parts Service Manual HITACHI Inspire the Next Protection Function Overcurrent Protection for Inverter Protection of Transistor Module Detecting curr
142. SW2 on PCB correspond No gt Set it correctly Indoor Unit No Does the alarm occur with all gt Faulty PCB the indoor units Yes Faulty PCB1 1 In case that terminal resistance DSW10 1P is OFF when H Link Connection is performed Set the terminal resistance to ON when CN2 is removed Set the terminal resistance to OFF when CN2 is reconnected SMGB0049 rev 2 08 2010 119 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch Power failure or no power supply Measure the voltage by means of the tester Supply the power Blown out fuse for the power Source or activation of the outdoor unit breaker Short circuit between wires Check the insulation material for breaks Remove the short circuit and replace the fuse Short circuited wire to ground Measure the insulation resistance Remove the short circuit to ground and replace the fuse Faulty comp motor Measure the resistance between the wires and the insulation resistance Replace the comp and the fuse Faulty outdoor unit fan motor Measure the resistance between the wires and the insulation resistance Replace the outdoor unit fan motor and the fuse Blown out fuse for control circuit or activation of outdoor unit breaker Short circuit bet
143. Ti H Aine U TAN req SEE LY nom um j T MV1 E gA Ja 0 iu RH s S I 3 i i CL Expansion valve position SMGBO0049 rev 2 08 2010 Outdoor units FSN2 237 HITACHI Inspire the Next 1 Remove the front service panel according to the item Removing Front Service Panel O 2 Remove each two 2 screws fixing the electrical control box cover and remove the electrical control box cover 3 TE Thermistor Remove CORK TAPE and pull out the thermistor with fixing plate from the pipe Remove the thermistor for the liquid pipe from the fixing plate 4 Re Tchg Thermistor and Tsc Thermistor Remove CORK TAPE and pull out the thermistor holder from the pipe Remove the thermistor for liquid pipe Servicing Service Manual NOTE When removing the thermistor for the liquid pipe pay attention not to be caught hands or thermistor on the valve stay fixing the stop valve assemble the thermistor in the reverse procedure for removing O NOTE When reassembling fix the thermistor with the vinyl pipe end downward to avoid entering water into the pipe Seal whole circumference with CORK TAPE Heat exchanger liquid pipe TE Evaporation pipe thermistor Vinyl pipe Fixing plate for thermistor TE Thermistor Tchg Thermistor Super cooling main line Tchg Thermistor Thermistor Thermistor holder Se
144. VR1 ON ISVRSCDIEE RAS 14 48FSN2 only Compressor operating at Outdoor Fan MIF OFF e Outdoor Fan MOF OFF 1 minute later High frequency T operation mood low frequency Fixed opening degree of Electronic Ex valve PID control for 9 supercooling electronic expansion valve a No Defrost time 10 Evaporating temperature No Discharge gas pressure minutes or above Te at heat exchanger is 15 C or above NH is 1 7 MPa or above Yes Defrosting completion RVR1 OFF re i 2 gt RVR2 ON DEFROST on LCD Y disappears SMGB0049 rev 2 08 2010 Standard operation sequence RAS 14 48FSN2 only 59 4 HITACHI Inspire the Next 4 5 Standard control functions Control system Service Manual Power Supply Cooling or Dry Operation A No Is compressor operated for more than 30 min The judging time varies under the condition Gas pipe surface temp of indoor heat exchanger Lower than 0 C Is it continuous for more than 3 min MIF operation at set fan speed in case of Dry operation MIF OFF for 6 min Fully closed electronic exp valve in Indoor Unit Higher than 0 C No Is it continuous for more than 3 min 6 min in case of DRY operation No
145. Vn control the Td and the SH If the expansion valves are incorrectly connected the correct control is not available This results in the compressor seizure depending on the returning conditions of the liquid refrigerant Also this may result in the insulation failure of the motor winding depending on the overheating conditions 10 If the refrigerant cycle and the electrical system are incorrectly connected an abnormally low suction pressure operation is maintained or an abnormally high discharge pressure operation is maintained This results in further stress to the compressor because the correct control of the compressor is not available 11 Ditto 12 The compressor may be locked due to the return operation of the liquid refrigerant during the cooling process 13 If the contacting resistance becomes large the voltage imbalance among each phase will cause an abnormal overcurrent 14 In this case the overcurrent will occur the efficiency will decrease or the motor winding will be excessively heated 15 In this case it will result in the burning of the motor or the compressor seizure 188 SMGB0049 rev 2 08 2010 Procedure for checking each main part Spare parts HITACHI Service Manual Inspire the Next 8 Spare parts Contents 8 Spare parts 189 8 1 RAS 8 12FSN 2 Cabinet and fan 190 8 2 RAS 8 12FSN2 Refrigerant cycle 191 8 3 RAS 8 12FSN2 Eelectric
146. ace for the outdoor unit Field work instruction Service Manual HITACHI Inspire the Next 11 6 Caution with the refrigerant leakage The designers and the installers have the responsibility to follow the local codes and the local regulations that specify the safety requirements against the refrigerant leakage The refrigerant RA10A which is charged in the SET FREE FSN2 system is an incombustible non toxic gas However if the leakage occurs and the gas fills a room the gas may cause suffocation The maximum permissible concentration of the HFC gas and the R410A in the air is 0 3 kg m according to the refrigeration and air conditioning system standard KHK S 0010 by the KHK High Pressure Gas Protection Association Japan Therefore you must take some effective measures in order to lower the R410A concentration in the air below 0 3 kg m if there is a leakage 1 Calculate the total quantity of refrigerant R kg that is charged in the system that connects all the indoor units of the rooms that need air conditioning systems 2 Calculate the room volume V m of each room 3 Calculate the refrigerant concentration C kg m of the room according to the following equation R R Total quantity of charged refrigerant kg V Room volume m V C Refrigerant concentration lt 0 3 kg m for the RA10A Use this value only for reference because this value is not fixed yet According to the KHK standards
147. age temperature of two compressors is indicated p p Thermo temp of the LL m Pies ons c eR 11 female coniral switch TN Ed If the temperature is higher than 126 C Z5 Troubleshooting HI ITACHI Service Manual Inspire the Next Indication of micro computer input output PCB Relay Partname Heating thermo ON Alatm H2 Relay for drain pump MD and or 12 Micro computer input VtH L Cooling thermo ON dew heater EHW output in indoor unit Im I qn L m 52H Relay for electric heater CEH T oues f Y211 Relay for 4 way valve t 52H Y52C1 Relay for compressor 13 Micro computer input Ded iu ms oS Y20A Relay for Selonoid Valve SVA2 output in outdoor unit LL Y20B Relay for Selonoid Valve SVA1 y Mi Y20F Relay for Selonoid Valve SVF CC Outdoor Relay for Outdoor Fan Fan YA Tenn fan YCH Relay for Cranckcase heater Indication of unit stoppage cause Operation OFF Power OFF Thermo OFF Note 1 Alarm Note 2 Freeze protection overheating protection Instantaneous power failure at outdoor unit reset Note 3 H Instantaneous power failure at indoor unit reset Note 4 aq Stoppage of cooling process due to low outdoor temperature stoppage of heating process due to high outdoor temperature BB Compressor quantity changeover stoppage HP 8 a Demand of 4 way valve changeover stoppage FX only Demand enforced stoppage
148. akage may occur when reassembling SMGB0049 rev 2 08 2010 224 Outdoor units FSN2 Servicing Service Manual RAS 8FSN2 to RAS 12FSN2 Brazing removing portion RAS 14FSN2 to RAS 24FSN2 Brazing removing portion Brazing removing portion RVR2 Brazing removing AERE Uy j portion RVR1 X X Brazing removing 7X portion Brazing removing portion _ Brazing removing portion Mole HITACHI Service Manual Inspire the Next 6 Remove the reversing valve assembly Remove the brazing as shown in the figure by covering the reversing valve with wet cloth for cooling Remove the brazing in the following order a Brazing at right and left branch pipes of three pipes from the reversing valve b Brazing at the centre branch pipe of three pipes from the reversing valve NOTE When removing brazing cover the reversing valve with wet cloth for cooling Reversing valve RVR2 Reversing valve RVR1 figure for RAS 48FSN2 figure for RAS 48FSN2 RVR1 i Brazing removing portion RVR2 Brazing removing portion E Removing Reversing Valve Coil P Reversing valve coil 1 Remove the one 1 screw fixing the reversing valve coil If the portion is difficult to remove brazing with a Phillips Screwdriver use a spanner or an adjustable wrench 2 Remove the reversing valve coil This is the unit front view SMGBO0049 rev 2 08 2010 Outdoor units FSN2 225 HITA
149. akage of solenoid valve SVA Check the outlet pipe temp of SVA Check the connect wires Replace SVA if faulty Valve stoppage at the medium position of the 4 way valve Measure the suction gas temp of 4 way valve Replace the 4 way valve if faulty Excessively low suction pressure Abnormal suction pressure sensor Check the connectors of PCB1 and the power source Replace the sensor if faulty Excessively high indoor unit and outdoor unit suction air temperature SMGB0049 rev 2 08 2010 148 Troubleshooting procedure Check the indoor unit and the outdoor unit suction air temp thermistor Replace the thermistor if faulty Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description E tot Activation for protecting the system from excessively high discharge pressure W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 n case that compressor is operated under the condition that is higher than 3 8MPa of suction pressure Pd for 1 minute all compressors are stopped and retry operation is started after 3 minutes However the alarm code is indicated when same phenomenon is occurred at two times w
150. al completely by cork tape Tsc Thermistor Super cooling bypass A Piping Tsc Thermistor Thermistor position for liquid pipe example RAS 24FSN2 SMGB0049 rev 2 08 2010 238 Outdoor units FSN2 Servicing HITACHI Service Manual Inspire the Next RAS 8FSN2 to RAS 12FSN2 RAS 14FSN2 to RAS 24FSN2 Pn ET m DURER 10 aes LO e f Auxiliary Electrical lectrical Control Box 1 Control Box Q fer Transmission THM23 i H Tsc S a In eo oa a i p Dec p B E THM17 J J a TE1 j os fH d THM10 i wca T wc2 3j MCI JI k TEN j 1 I Hog I eC h 1 Je j uit THM11 THM23 RAS 26FSN2 to RAS 42FSN2 g Electrical a Control Box for Transmission Auxiliary Electrical f I I f Control Box lt THM10 TE1 I et i Nom E Tchg THM11 THM23 TE2 Tsc RAS 44FSN2 to RAS 48FSN2
151. al equipment 192 8 4 RAS 14 24FSN2 Cabinet and fan 193 8 5 RAS 14 24FSN2 Refrigerant cycle 194 8 6 RAS 14 48FSN2 Electrical equipment 195 8 7 RAS 14 48FSN2 Electrical equipment 196 SMGB0049 rev 2 08 2010 189 H ITACH l Spare parts Inspire the Next Service Manual 190 SMGB0049 rev 2 08 2010 HITACHI Inspire the Next Spare parts Service Manual 8 1 RAS 8 12FSN2 Cabinet and fan 191 SMGBO02049 rev 2 08 2010 RAS 8 12FSN2 Cabinet and fan Spare parts Service Manual HITACHI Inspire the Next 8 2 RAS 8 12FSN2 Refrigerant cycle l Koy ANN SMGB0049 rev 2 08 2010 192 RAS 8 12FSN2 Refrigerant cycle eae HITACHI Service Manual Inspire the Next 8 3 RAS 8 12FSN2 Eelectrical equipment SMGB0049 rev 2 08 2010 193 RAS 8 12FSN2 Eelectrical equipment Spare parts Service Manual HITACHI Inspire the Next 8 4 RAS 14 24FSN2 Cabinet and fan W E 5 A WS
152. alve Mole HITACHI Service Manual Inspire the Next RAS 8FSN2 to RAS 12FSN2 RAS 14FSN2 to RAS 24FSN2 figure for RAS 24 FSN2 dol I LL 1 A pr MVB ws PST TI t E al MV1 le tt il dp e MV2 ji zi J I FU i M D 3 GNE max pp RAS 26FSN2 to RAS 42FSN2 figure for RAS 42 FSN2 MV3 MV2 MVB MV1 RAS 44FSN2 to RAS 48FSN2 figure for RAS 48 FSN2 MV4 MV3 MV2 e e e e Ji e e l e ii MVB P Ia
153. and over 5 minutes exchanger capacity Opening degree of 1 For controlling 1 Tdo Tc 30 lt 95 1 For comp Tdmax gt 100 C Discharge gas super expansion valve for the temp of Protection and EVo gt 430 pls heat TdSH control plate heat exchanger discharge gas continues for 5 min super heat TdSH 2 For comp 2 Tdmax gt 100 C protection and EVI 1500 Opening degree of expansion valve for indoor 1 For controlling temp of discharge gas super heat TdSH 2 For controlling the temperature difference between the gas pipe and the liquid pipe of the indoor unit heat exchanger 3 For balancing the temperature differences between the gas pipe and the liquid pipe of each indoor unit 1 Tdo Tc 30 lt s95 2 Temperature difference between the gas pipe and the liquid pipe of each indoor unit 4 C 1 For controlling temp difference between air outlet and air inlet of I U 2 For balancing the temp difference between air outlet and air inlet of I U Air outlet temp air inlet temp lt 24 C Opening degree is fixed Outdoor fan Fan controlling discharge pressure Pd 2 5 lt Pds2 9MPa PWM control by DC motor constant speed fan motor Fan controlling outdoor air temp Outdor air temperature PWM control by DC fan motor constant speed fan motor Stop SMGB0049 rev 2 08 2010 Device control system Control system Service Manual HITACHI
154. anges as shown below 1 I a lam After several seconds have passed the remote control switch is automatically activated again 10 When the remote control switch is activated again the RUN indicator is ON and the operation is started Therefore press the RUN STOP switch and stop the operation RUN STOP Cancellation of EEPROM from step 3 The LCD indication changes as shown below and the remote control switch automatically cancels the EEPROM 11 mae ht The LCD changes as shown below Vr Lt UL 12 After several seconds have passed the remote control switch is automatically activated again In this case the operation is not started automatically M If the indicators pr thermostat is abnormal If you press the RESET switch or you leave the switches for 15 seconds the data of EEPROM storage cell inside of the remote control switch is cleared At this time the number is displayed at the A part which is shown in the figure below When the number is displayed EEPROM is abnormal If the number which is displayed at the A part is the checking does not proceed to the next item EET O NOTE 1 In case that the operation is not automatically started when the remote control switch is activated again the detection circuit for the momentary stoppage may be abnormal However
155. ansion valves etc This coud origin problems in the compressor Use a reducer valve when nitrogen gas blowing is performed during brazing The gas pressure should be maintained within 0 03 to 0 05 MPa If an excessively high pressure is applied to a pipe it could origin an explosion SMGB0049 rev 2 08 2010 23 Piping work considerations HITACHI Inspire the Next 2 2 Outdoor units piping installation Piping installation Service Manual Accessory Q ty Purpose Flange gasket Pipe flange of refrigerant gas p Connection for refrigerant gas piping with RAS 10FSN2 to 48FSN2 ipin QL 9 piping x 1 O Pipe with flare nut of refrigerant gas piping 219 05 Co 1 Connection for refrigerant gas piping with RAS 8FSN2 Pipe with flare nut of refrigerant Igi piping 813 05 1 Connection for refrigerant liquid piping with RAS 26FSN2 to 48FSN2 Rubber bush 2 For connection hole of operation wiring 1 For connection hole of power source wiring Screw 3 Spare SMGB0049 rev 2 08 2010 24 Outdoor units piping installation Piping installation Service Manual Remove the service cover as shown in fig below before piping connection position 8 pieces Remove fixing screws on the lower position 6 pieces and the upper HITACHI Inspire the Next
156. apacity control ON PID Control for I U and O U Electronic Ex Valve gt Power to MC1 MC5 OFF Power to CH1 CH5 ON a Y4 MIF OFF Outdoor Fan MOF Air Flow Hi Outdoor Fan MOF Air Flow Me Outdoor Fan MOF Air Flow Lo Outdoor Fan MOF Air Flow SLo y y Y SMGB0049 rev 2 08 2010 55 Standard operation sequence HITACHI Inspire the Next Dry operation cont Pressing Pressing RUN STOP Switch AUTO LOUVER switch Power to Y52C OFF Power to CMC1 CMC5 OFF Control system Service Manual shebang nenna only for air panel or Indoor Unit with Auto Louver for unit with drain pump MD Stop Power to YH2 OFF Stop of gt MC1 MC5 Stop of L MOF1 MOF4 Power to CH1 ON Power to CH2 CH5 ON Power to gt EHW OFF RPC Power to MIF OFF sd RUN STOP Lamp OFF COOL Set Fan Speed amp Set Temp indication Continuously ON ad Electronic Ex Valve in I U and O U Fixed opening STOP Power to I U OFF m Power to Power to PCB in I U OFF a Power to solenoid valve SVA ON Nos S oU O U OFF Discharge gas pres sure Pd a Power to PCB
157. ase of installing such a place provide the additional drainage around the foundation Units installation Service Manual Bi Position of anchor bolts When installing the outdoor unit fix the unit by anchor bolts Refer to figure below regarding the location of fixing holes Model RAS 8 12FSN2 217 x 135 26 x 2 Model RAS 14 24FSN2 982 205 388 200 58 S 54 205 388 200 8 1 ii 156 amp i G A 52 O 0x5 e i 826x2 217 x 135 Model RAS 26 42FSN2 9 205 388 200 58 e i 156 8 70 o 26 x 12 e 26 x 2 217 x 135 116 677 677 M SIZ SIZ S A 10 38x15 N AIN 27 5 Model RAS 44 48FSN2 2998 205 388 200 _ 58 erm AAR a 3 2 217 x 135 26 x 2 26 x 16 Power source connection Control circuit connection Refrigerant piping connection 0 0 06 Drain hole Drain boss position option 16 SMGB0049 rev 2 08 2010 Outdoor units installation 3870 118 727 727 NIY A UN 12 38x15 27 5 Q Hole of anchor bolt M12 The dimensions marked with indicates the mounting pitch dimension for anchor bolts Piping installation Service Manual Contents 2 a Piping installation 2 Pip
158. ating for two months Cause The refrigerant piping work was performed during the summer season The additional refrigerant was not sufficiently charged from the discharge gas side This insufficient refrigerant charge resulted in the overheating of the discharge gas and the oil deterioration which was finally due to the separated operation despite the alarm code 08 Countermeasure 1 The compressor was replaced with a new compressor 2 The correct refrigerant amount was charged according to the refrigerant piping length and the connected indoor units Remarks Additional refrigerant charge Open the liquid stop valves slightly when you charge the additional refrigerant from the check joint of the liquid stop valves the discharge gas side during the cooling process If the liquid stop valve is fully open it is difficult to charge the additional refrigerant Do not charge the refrigerant from the gas stop valve SMGB0049 rev 2 08 2010 264 Checking the power source and the wiring connection Field work instruction HITACHI Service Manual Inspire the Next 11 3 Insufficient cooling performance when a long piping is applied E Question and answer for the field work Example 2 Insufficient cooling performance when a long piping is applied Phenomenon Sufficient cooling was not available for an indoor unit that was located at the farthest position Cause If the location of an outdoor unit is 20 m
159. ation and breakage ll RAS 12FSN2 Example Shroud SMGBO0049 rev 2 08 2010 Outdoor units FSN2 205 HITACHI aie Inspire the Next Service Manual 9 1 4 Removing outdoor fan 1 Remove the fan guard net according to the item Removing Fan Guard Net E RAS 8FSN2 to RAS 12FSN2 E RAS 14FSN2 to RAS 24FSN2 DC Fan Motor MOF2 DC Fan Motor DC Fan Motor MOF1 E RAS 26FSN2 to RAS 42FSN2 E RAS 44FSN2 to RAS 48FSN2 AC Fan Motor MOF4 DC Fan Motor MOF3 f DC Fan Motor MOF3 AC Fan Motor MOF2 AC Fan Motor MOF2 DC Fan Motor MOF1 em C Fan Motor MOF1 a l p n E n Dus if IN Lal a Se Fee 5 2 Remove the nut and the flat washer fixing the propeller fan onto the motor shaft by use of an adjustable wrench Remove the propeller fan from the motor shaft If it is difficult to remove the fan because the fan is firmly fixed with the motor shaft use a puller NOTE DO NOT apply excessive force to the shroud plastic part to avoid deformation and breakage Fan motor position E RAS 12FSN2 Example SMGB0049 rev 2 08 2010 206 Outdoor units FSN2 Mole HITACHI Service Manual Inspire the Next 3 Removing Wire Remove the service panel and the electrical control box cover according to the item Removing Front Service Panel and the item Removing Elec
160. azing of the five minutes Also make sure that Pd gt Ps discharge piping Josias If the compressor replacing mode is performed again smaller set the DSW4 4 to OFF and keep the DSW4 4 at the FS OFF side during ten minutes Then start according to the merat procedure No 6 Time 11 Collect the refrigerant by means of the refrigerant The discharge of the refrigerant in the atmosphere collection is strictly forbidden Make sure that the refrigerant is Perform either A or B depending on the process 10 collected by the collector A The leak rate at the process 10 is within the Keep a note of the quantity of the collected refrigerant specification Collect the refrigerant only at the low pressure side B The leak rate at the process 10 is greater than the specification Collect all the refrigerant of the outdoor unit side by means of the machine 12 After collecting the refrigerant remove the change Make sure that there is no pressure increase of the low hose collector side of the low pressure side so that pressure sides after collecting the refrigerant the low pressure side of the refrigerant cycle willbe L Make sure that the refrigerant cycle is the atmosphere the atmosphere pressure pressure Otherwise problems such as the blowing of gas and the suction of the cutting material may occur when you are removing the compressors 13 Turn OFF the main switch of the outdoor unit 14 Perform the replacement of the co
161. bition A Detect abnormality Normal control i 5 sec i i continuously 1 bog l 1 1 1 10 min 1 i continuously l 1 TE 1 1 1 100 108 110 132 140 Temp at the top of inverter compressor Td1 C Restricted control Normal control after retry Frequency forced decrease Frequency increase prohibition A A Detect ji i 1 abnormality i i i Constant 1 1 1 1 1 1 speed comp OFF i TEE l i i i l 3 10 3 30 3 35 3 40 3 80 Discharge pressure Pd MPa SMGB0049 rev 2 08 2010 65 Restricted control for Outdoor Units Available optional functions H ITACHI Inspire the Next Service Manual M JJ 5 Available optional functions Contents 5 Awailable optional functions 67 5 1 Outdoor units 68 5 1 1 Setting of external input and output functions 68 5 1 2 Description of external input signals 70 5 1 3 Description of external output signals 73 5 1 4 Optional functions 74 SMGB0049 rev 2 08 2010 67 HITACHI Inspire the Next 5 1 Outdoor units Available optional functions Service Manual On the outdoor unit printed circuit board there are three input terminals to receive external signals and two output terminals to send signals outwards These signals are available by setting as shown below Control Function No SEG1 Input Out
162. ble for their safety Turn OFF all power switches before maintenance is performed Do not start the cleaning procedures before 5 minutes of the stop of the unit A WARNING Check and ensure that the accessories are packed with the indoor unit Do not install the indoor units outdoors If installed outdoors an electric hazard or electric leakage will occur Consider the air distribution from each indoor unit to the space of the room and select a suitable location so that uniform air temperature in the room can be obtained It is recommended that the indoor units be installed 2 3 to 3 meters from the floor level If the unit is installed higher than 3 meters it is also recommended to use a fan in order to obtain an uniform air temperature in the room Avoid obstacles which may hamper the air intake or the air discharge flow Children must be supervised to ensure that they do not play with the electrical appliances Before obtaining access to terminals all supply circuits bust be disconnected 2 SMGB0049 rev 2 08 2010 General installation notes Units installation HITACHI Service Manual Inspire the Next A WARNING Pay attention to the following points when the indoor units are installed in a hospital or other places where there are electronic waves from medical equipment and similar Do not install the indoor units where electromagnetic wave is directly radiated to the electrical box remote contro
163. c If touched abnormal noises may occur due to the vibration of the piping Pay special attention in case of short piping length In order to fix the piping to wall or ceilings use suspension and clamping systems as shown in the following figure 1 15m Fire proof section gt treatment Indoor unit SMGB0049 rev 2 08 2010 21 Piping work considerations HITACHI Piping installation Inspire the Next Service Manual 1 Flaring connections smaller than a diameter of 019 05 are generally used However if incorrect flaring is performed it will cause serious refrigerant leakage 2 Shape after Flaring it should be rectangular and flat and no uneven thickness cracks and scratches should exist Nominal diameter Od Dimension inches mm A 0 0 0 4 mm lt 1 4 6 35 9 1 3 8 9 53 13 2 1 2 12 70 16 6 5 8 15 88 19 7 3 4 19 05 It is impossible to perform the flaring work In this case use a joint selected from the table in point 3 When tightening the flare nuts use two spanners as shown in the figure Pipe diameter mm Size B R410A Tightening torque Nm 6 35 1 4 17 20 09 53 3 8 22 40 912 70 1 2 26 60 015 88 5 8 29 80 2 019 05 3 4 36 100 Stop valve Ref pressure Cap Allen key t pdf SAN et the in i T PL with indicate Sed M AAN torque Attach this a
164. c rr r1 Not Available capacity mode i e em EL pt tion 2 re pt PSW2 PSW1 ee PSW1 SET SET Available Available PSW3 PSW3 l A TL L ve r1 Not Available Not prepared r r1 Not Available capacity mode rU Li Id LI PSW2 PSW1 irn PSW1 SET SET Available Available I PSW3 PSW3 t Not prepared cr V1 Not Available Not prepared ad r1 Not Available al J Lt L Ct Li PSW2 PSw1 E PSW1 SET SET Available Available PSW3 0 t 9 SMGB0049 rev 2 08 2010 75 Outdoor units Available optional H ITACH l functions Inspire the Next Service Manual E Circulator function at heating thermo OFF Press RSW1 and select the setting condition 1 at the circulator function at heating thermo OFF FA In case that the fan speed is changed to LOW at heating Thermo OFF there is a case that the room air temperature is too high at heating Thermo OFF In this case the circulator function at heating thermo OFF is recommended and its function explains below The indoor fan operates for 2 minutes and stops for 6 minutes as a cycle when the activation conditions are satisfied Operation When the indoor unit is at thermo OFF during the heating operation the indoor fan operates and stops for 6 minutes in 2 minute cycles Start at random OFF 7 NOTE When the indoor fan is stopped by another control it is not available to operate indoor fans
165. ce PCB2 and the transistor module Y Is the silicon grease coated all over between the transistor module and the radiated fin Is the fixed screw on the transistor module loose No Coat the silicon grease to all the touched face between the transistor module and the radiated fin fully Fix the Yes screw correctly 4 Is the heat exchanger Yes of outdoor unit clogged gt Remove clogging No Replace the PCB2 1 Regarding replacing or checking method for the inverter components refer to item Procedure of checking other main parts 2 Before the checking of inverter components refer to item Procedure of checking other main parts regarding electrical discharge 3 Turn ON the No 1 switch of the dip switch DSW1 on PCB2 when restarting with disconnecting the terminals of the compressor After troubleshooting turn OFF the No 1 switch of the dip switch DSW1 on PCB2 4 Use the silicon grease provided as accessory Service Parts No P22760 Position of Surge Absorber SA 380 415V When the unit is applied the excessive surge current due to o NE Go opr ge lighting or other causes it is indicated this alarm code 04 or en A 8 DN the inverter stoppage code ITC 11 and the unit can not be T
166. cle and the electrical system Repair the wiring Undercharged refrigerant Check pressures Correctly charge the refrigerant Faulty Ex valve Check expansion valve refer to procedure of checking other main parts Replace the ex valve if faulty Fault Replage Pee and Chern MME Replace PCB1 if faulty operation Faulty PCB1 Disconnected Wires Tor the Check the connections Repair the wiring connection Ex valve control Fault Mesure IME esitanoe oF Replace the thermistor if faulty thermistor Faulty discharge gas ingerer Check the mounting state Correctly mount the thermistor mounting thermistor incorre i Remove looseness Replace Check the connections the connector or repair the connection connections SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description m r1 Activation of the protection device for the outdoor AC fan motor Li 0 RAS 26FSN2 to RAS 48FSN2 Only W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the temperature of the internal thermostat ITO2 for RAS 26 to 42FSN2 ITO2 and ITO4 for RAS 44
167. cle number is 63 im Bg H mjr T 123456 RS SMGB0049 rev 2 08 201 0 Electrical wiring for the outdoor unit Electrical wiring HITACHI Service Manual Inspire the Next lil DSW2 Capacity setting No setting is required Before shipment each outdoor unit is set as shown below Model RAS 8FSN2 10FSN2 12FSN2 14FSN2 16FSN2 18FSN2 20FSN2 ON ON ON ON ON ON ON Setting position MEE EFE MEME Re MM ee ERE 123456 123456 123456 123456 123456 123456 123456 Model RAS 22FSN2 24FSN2 26FSN2 28FSN2 30FSN2 32FSN2 34FSN2 ON ON ON ON ON ON ON Setting position WAMAMM MREMER EHEMMER BR A Be ERREUR 123456 123456 123456 123456 123456 123456 123456 Model RAS 36FSN2 38FSN2 40FSN2 42FSN2 44FSN2 46FSN2 48FSN2 Setting position MEME EMEEME BARRA A MEMEME 123456 123456 123456 123456 123456 123456 123456 ll DSW3 Height difference Setting is required The Outdoor Unit is located higher than Indoor Unit 0 50m ON The Outdoor Unit is located lower than Indoor Unit 0 20m wil 12 The Outdoor Unit is located lower than Indoor Unit 20 40m ON Al 12 Heating capacity regulation for heigh difference ON E DSWA4 Test operation and service setting Setting is required This DIP switch is used for test operation and operating compressor Setting before the shipment ON Test cooling
168. ct connection Check the connections Repair the connections SMGB0049 rev 2 08 2010 129 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description Abnormal operation of thermistor for the indoor unit air inlet temperature air inlet thermistor W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the thermistor is short circuited less than 0 24 kQ or cut greater than 840 kQ during the cooling process or the heating process The system is automatically restarted when the fault is removed PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Is THM1 connected to intake No of PCB gt Connect it Yes Is the resistance of THM1 Ne i between 0 24kQ and 840kQ 7 Faulty thermistor Indoor unir air inlet Yes NM thermistor THM1 x In case of 4 way cassette Faulty PCB Action Phenomenon Cause Check item Turn OFF the main switch Fault Check the resistance Replace the thermistor if faulty Faulty air inlet thermistor Incorrect connection Check the connection Conn
169. ction pressure of compressor Pd Discharge pressure of compressor G NOTE During the protection control except during the alarm stoppage the protection control code is displayed The protection control code is displayed during the protection control and turns off when you are canceling the protection control After the retry control the condition of monitoring continues for 30 minutes The maximum current value of constant compressor 1 is as follows Power source 380 415V 50Hz eg Maximum current value A MC2 MC3 MC4 MC5 RAS 14 16FSN2 15 5 RAS 18 20FSN2 15 5 15 5 RAS 22 24FSN2 15 5 26 0 RAS 26 28FSN2 26 0 26 0 RAS 30 to 36FSN2 26 0 26 0 15 5 RAS 38 to 42FSN2 26 0 26 0 15 5 26 0 RAS 44 to 48FSN2 26 0 26 0 26 0 26 0 SMGB0049 rev 2 08 2010 175 Troubleshooting procedure Troubleshooting HITACHI Inspire the Next Service Manual 7 3 Procedure for checking each main part Use the following troubleshooting procedure for testing the PCB in the indoor unit and the outdoor unit RUN STOP Stop operation agii O Press both TS switches for three PCB check mode OK seconds C
170. d Connect the charge hose to the charge port of return oil Use a clean charge hose 19 circuit and charge the refrigerant oil Use a container with a small opening so that the refrigerant oil does not absorb the moisture in the atmosphere Ifthe refrigerant oil is not clean it should be changed as new one Disconnect the charge hose from the charge port of return In case of collecting refrigerant at only low pressure side in 20 oil circuit Perform the vacuuming from the check joint atlow process No 9 pressure side Vacuuming cannot be performed from high pressure side 21 Turn OFF the main switch of O U 22 Set DSW4 4 6 back to the original setting Refer to Process No 17 and 18 23 Check that the power line for comp and wirings are Check the main switch is OFF connected correctly Recharge the collected refrigerant process No 10 from the check joint at high pressure sides For the remained refrigerant quantity 24 Open the liquid and gas stop valves completely and set DSW4 1 to ON side O U PCB1 Then recharge it from the liquid stop valve check joint during cooling operation 25 Check the liquid and gas stop valves are open completely O U Outdoor Unit I U Indoor Unit 7 Seg 7 Segment Comp Compressor SMGB0049 rev 2 08 2010 Initial troubleshooting Troubleshooting HI ITACHI Service Manual Inspire the Next 2 Incase that compressor does not operate Perform only when collect
171. de stop valve Fixing screw for gas side stop valve Remove screws SMGB0049 rev 2 08 2010 234 Outdoor units FSN2 Mole HITACHI Service Manual Inspire the Next RAS 14FSN2 to RAS 24FSN2 Brazing removing portion After removing stop valve 7 7 Stop valve Liquid side Stop valve Gas side Perform the brazing work while covering the stop valve with wet Fixing screw Fixing screw for cloth for cooling for Liquid Side Gas side stop The allowable temperature limit stop valve valve at the stop valve inside is 120 C RAS 26FSN2 to RAS 48FSN2 Brazing removing portion After removing stop valve c Stop valve Stop valve Liquid side Gas side FC y Plate Perform the brazing work while covering the stop valve with wet cloth for cooling The allowable temperature limit stop valve at the stop valve inside is 120 C Fixing screw i Fixing screw for for liquid side gas side stop valve SMGB0049 rev 2 08 2010 235 Outdoor units FSN2 HITACHI Inspire the Next 1 Remove the front service panel according to the item Removing Front Service Panel 2 Turn the expansion valve coil in counterclockwise direction as shown in the figure Remove the expansion valve coil bracket from the expansion valve slot Then pull the coil upward Pay attention to the thermis
172. der Thermo OFF condition Cooling operation Air flow setting Heating operation Lo setting The stoppage code No 10 is given By disconnecting the demand switch contact restarting is available Setting Example Demand Stoppage at Input 3 between 1 and 2 pins of CN18 3P Connector Outdoor unit PCB1 S83 Demand stoppage switch CN18 SS3 o 1 2 E gt lol le 9 3 Power source X1 X1 Control circuit Wiring diagram example of demand stoppage SMGB0049 rev 2 08 2010 Outdoor units Available optional functions H ITACHI Inspire the Next Service Manual E Input 3 Snow sensor Control function No 4 In the case that the input terminals of the snow sensor on the outdoor unit PCB1 are short circuited during compressor stoppage all the outdoor fan motors are operated at the full speed However if the compressor is called for compressor operation the fan operation is changed to the normal operation If the input terminal is opened the fan s is stopped This function protects the outdoor units from a condition covered with snow Setting Example Snow Sensor at Input 3 between 1 and 2 pins of CN18 SS3 Snow sensor switch 3P Connector Outdoor unit PCB1 CN18 S93 2 gt 5 Power 3 source X1 X1 Control circuit Wiring diagram example of snow sensor B Input 3 Forced stoppage Control function No 5 The compressor is stopped and
173. dication during the refrigerant amount judgement is changed to the protection control code by the protection control it is not abnormal As for the protection control code refer to the sheet attached to the inside of the outdoor unit service cover ple judgement system for refrigerant amoun You can check the excess or the deficiency of the refrigerant by means of the data that is provided by the check mode of the 7 segment display The following checking procedure is useful during the test run and the maintenance Before the checking procedure 1 Operate all the indoor units at the TEST RUN mode and operate all the indoor units at the HIGH speed 2 Check the following items in order to make sure that the refrigerant cycle is stable 1 The continuous operation lasts more than 20 minutes 2 Td SH is 25 to 45 C in cooling or 15 to 45 C in heating 3 Ps is 0 4 to 1 1 MPa in cooling or 0 2 to 1 1 MPa in heating 4 Pd is 2 0 to 3 5 MPa in cooling or 1 6 to 3 5 MPa in heating Td SH Discharge gas temperature superheat Ps Suction pressure Pd Discharge pressure 3 Collect the checking data that is provided by the check mode of the 7 segment display 4 Perform the checking according to the following procedure Judge according to the following target value Cooling Refrigerant flow charge is controlled by indoor unit expansion valve Heating Refrigerant flow charge is controlled by outdoor unit expansion valve
174. diode module are displayed in item Procedure for checking other main parts In the case the wiring is correct replace transistor module SMGB0049 rev 2 08 2010 123 Troubleshooting procedure Troubleshooting HITACHI Inspire the Next Service Manual Alarm code Description LUCI Excessively low or high voltage for fan module W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the voltage between terminal P and N of Fan Module is insufficient and the alarm has three occurrences in 30 minutes If the number of occurrences is smaller than two times the retry operation is performed PCB1 Outdoor unit printed circuit board Restart the operation l Is the power supply voltage No Check the wiring and the 10 of the nominal voltage cable capacity Yes Is the voltage over 332V during the operation 400V Yes Does the voltage fall during Yes the operation because of the operation of other apparatus No No Frequency can increase higher than 60 Hz How is the Does LED 201 on fan compressor Fan stops immediately Faulty fan module cont
175. e A Ro a BW Lu AR S 5 4 y LETIA c z E z MU c Y oO E note o gt E nD c D amp N 2 en gt KS o Sos 6060 ou Le A y Al dl _ xe g SNES TW Ay 9 T N gt ez 3 o 25 P m Ho g o E 20 D S e 2 MSc c 8 a 2 seg o o iR E 2 2 jp 3 3 REE Ge S is a moa oo gt o i L4 N gii nr E He 5 g 5 ilg i x QE DB S I D o gt 26 EEE idis de Se sl S856 Soo O oo aoc Ao TU a o I V 2i X a NS f o z D S E ke o Y 8 5 ox E o gt 3 nan D De amp S o ot o 2 a a c o lt a 227 Outdoor units FSN2 SMGB0049 rev 2 08 2010 Service Manual Servicing HITACHI Inspire the Next 42FSN2 RAS 26FSN2 to RAS figure for RAS 42FSN2 Solenoid Valve Solenoid Valve Solenoid Valve Solenoid Valve Solenoid Valve Solenoid Valve Solenoid Valve Solenoid Valve SVA1 Detailed figures Brazing Removing Portion Brazing Removing Portion Brazing Removing SVA4 Brazing Removing Portion Brazing Removing Brazing Removing Portion C 2 Removing Brazing Portion SMGBO0049 rev 2 08 2010 Outdoor units FSN2 228 Servicing HITACHI Service Manual Inspire the Next RAS 44FSN2 to RAS 48FSN2 Solenoid Valve Solenoid Valve SVA4 Sol
176. e Manual 4 6 Restricted control for Outdoor Units HITACHI Inspire the Next 1 Purpose Minimize the frequency of the operation stoppage because of an alarm 2 Procedure Improving the protection control after the retry operation Protection control is activated before reaching of setting value for each protection control Restricted control 3 Applicable case Example Inverter overcurrent Pressure ratio decrease Decrease in the discharge gas superheat Increase in the discharge gas temperature Discharge pressure increase Discharge gas temp increase protection control Normal conditions Frequency increase prohibition Normal control Frequency forced decrease A Detect abnormality 1 i 5 sec i continuously 1 A 1 10 min 1 continuously l 1 1 1 1 1 1 i 1 118 120 132 140 Temp at the top of inverter compressor Td1 C Discharge pressure increase protection control Normal conditions Frequency increase prohibition Normal control Frequency forced decrease A Detect i 1 1 i abnormality i i Constant 1 1 1 1 1 1 speed oot comp OFF i Pod l i i l 3 20 3 40 3 45 3 50 3 80 Discharge pressure Pd MPa Restricted control after retry Frequency increase Frequency forced decrease prohi
177. e outdoor heat exchanger is higher than 10 C the high pressure is higher than 2 0MPa or under the Thermo OFF condition ON H in uM immediately and the indoor 123456 unit is under the Thermo OFF condition ON SetDSWI tat OFF When DSW4 4 is OFF the ON compressor starts to operate Pl after the cancellation of the 123456 3 minute guard Manual Manual defrost operation The defrost operation is Do not repeat the defrost operation frequently defrost starts Press the PSW1 for available regardless of the When the PSW1 accepts the manual defrost operation the remaining time before starting the defrost operation is displayed at the 7 segment display on the PCB Remaining time every 4 seconds SMGB0049 rev 2 08 2010 Test run procedure from the outdoor unit side 85 HITACHI Inspire the Next 6 3 Check list Test run Service Manual E Check list on test run Client Installer Date Outdoor unit model Outdoor unit serial No Checker model Indoor unit Indoor unit serial No Piping lenght m Additional refrigerant charge kg 1 General No Check item Result 1 Was the DIP switch DSW6 for the piping length in the outdoor unit set 2 Was the DIP switch DSW3 for the piping lift in the outdoor unit set 3 Are the power supply wires of the transmission cable
178. e side Incase of B perform 2 of In case that compressor B If the leak rate at the Process No 9 is greater than the does not operate in Method of Collecting Refrigerant specification collect all the refrigerant of the O U side by the collector After collecting the refrigerant remove the low pressure side Make sure that there is no pressure increase of the low charge hose at the collector side so that the low pressure pressure sides after collecting the refrigerant 11 side of the refrigerant cycle will be the atmosphere pressure Make sure that the refrigerant cycle is the atmosphere pressure Otherwise problems such as the blowing of gas and the suction of the cutting material may occur when removing the comp 12 Turn OFF the main switch of the O U SMGB0049 rev 2 08 2010 97 Initial troubleshooting HITACHI Inspire the Next Troubleshooting Service Manual Process Procedure Remarks No In case collecting refrigerant oil in oil separator is required This work is necessary for replacing comp and return oil Connect the charge hose to the charge port of return oil circuit circuit Measure the collected refrigerant oil quantity Take out the refrigerant oil from the charge hose at the Check that no refrigerant oil remains in the oil separator release side to the oil pan when replacing the oil return circuit The re
179. each electrical part to the electrical box with plastic band to avoid direct contact with compressor piping and plate edge 3 Fix the wiring neatly to avoid the damage by pressing with the electrical box cover 4 Fix the fan motor wiring with cord clamp as shown in the figure Details of fixing the vinyl pipe edge More than 10 mm of waterproof vinyl tape must be in the electrical box Waterproof vinyl pipe edge Plastic band SMGB0049 rev 2 08 2010 242 Outdoor units FSN2 Servicing Service Manual NOTES 1 Apply conductive silicon grease Service Parts No P22760 slightly over the contact surface with the fin when replacing the components of the heat radiation fin such as transistor module IPM diode module DM and fan controller FANM1 2 Match the terminal Nos with the mark band Nos when reassembling If incorrectly connected malfunction may occur or the electrical components may be damaged The U and V Phase of the power source cables U V and W phase for inverter compressor MC1 should be past through the current sensor CTU and CTV of the inverter module PCB2 completely Connect U Phase of the power source cable with U Phase side CTU and V Phase with V Phase side CTV of the current sensor If not it may cause of equipment malfunction or failure When fixing PCBs or sheet metal for PCB protect the electric wiring from being caught on the sheet metal or the el
180. ect wiring correctly Faulty PCB operation Replace PCB and check the Replace PCB if faulty O Thermistor resistance K9 2 5 0 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Air temperature C Thermistor characteristics SMGB0049 rev 2 08 2010 130 Troubleshooting procedure a aK amp NOTE This data is applicable to the following thermistors 1 2 Indoor unit discharge air temperature Indoor unit liquid refrigerant temperature Indoor unit air inlet temperature Outdoor temperature Outdoor unit evaporating temperature Indoor unit gas piping Outdoor unit PCB display indication Indor unit Alarm number for code failure 11 19 Troubleshooting HITACHI Service Manual Inspire the Next Alarm code Description Abnormal operation of the thermistor for the indoor discharge air UL temperature air outlet thermistor W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the thermistor is short circuited less than 0 24 kQ or cut greater than 840 kQ during the cooling process or the heating process The system is
181. ectrical components Make sure to use screws bushes and collars when fixing PCBs for inverter compressor If not it may cause of equipment malfunction When replacing the PCB for transmission set the dip Switches same as before PCB replacing Incorrect setting will cause malfunction Refer to the instruction manual attached with servicing PCB Do not apply excessive force to the electrical components on PCB or PCB itself It may lead to PCB failure When replacing the fan controller set the dip switches same as before replacing the fan controller Incorrect setting will cause malfunction n Removing PCB1 and electrical components for electrical box HITACHI Inspire the Next Removing PCB1 1 2 Remove all the connectors for wiring at PCB1 Hold the middle part of the holder fixing the PCB1 Part A in the figure 10 portions with a long nose pliers and pull it out to remove Opening PCB1 fixing plate 1 2 Remove all the wirings connected with electrical components Remove screws at Part B in the figure Electrical components are available to check or replace from the opening RAS 8FSN2 to RAS 12FSN2 220V 60Hz Only four 4 screws RAS 8FSN2 to RAS 48FSN2 two 2 screws If the fixing plate for PCB1 is removed all the connectors connected with PCB1 should be removed Removing electrical components 1 2 O Remove all the wirings connected with electrical components Re
182. ellation of outdoor ambient temperature limit of cooling Press PSW1 and select the setting condition 1 at the cancellation of outdoor ambient temp limit of cooling Bs Then this function can be set The cooling operation is continued under a low temperature Operation in cooling mode The factory set limitation of the range of permissible outdoor tem perature in the heating process 20 which is shown in the right figure Area of operation i t is cancelled Stoppage Suction air 10 temperature C 8 0 Outdoor Temp C 7 NOTE The operation may be OFF due to low outdoor temperature protection control since protection control is not cancelled SMGB0049 rev 2 08 2010 Outdoor units Available optional functions Service Manual E Change of defrost condition Press PSW1 and select the setting condition 1 at the change of defrost condition Ley HITACHI Inspire the Next Standard Specifications Cold area specification Setting condition When change of defrost condition is NOT set When change of defrost condition is set Temperature conditions Defrosting operation stop area Defrosting operation stop area under defrosting Outdoor evaporating operation temperature C Pipe Outdoor evaporating temperature C Pipe lt j b Outdoor temperature C Outdoor
183. emove the clogging No Replace the PCB2 or thermistor 1 1 Refer to section Procedure of checking other main parts for the replacing procedure and the checking procedure for the PCB2 SMGB0049 rev 2 08 2010 155 Troubleshooting procedure Troubleshooting HITACHI Inspire the Next Service Manual Alarm code Description Inverter failure W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm is indicated when the following phenomenon occurs 3 times in 30 minutes including 3 Retry operation is performed up to the occurrence of 2 times Actual frequency from PCB2 is less than 10Hz after inverter frequency output from PCB1 Conditions This alarm is indicated when PCB2 is not performed normally PCB1 Control PCB in Outdoor Unit PCB2 Inverter PCB Turn off power disconnect U V W from compressor terminals and restart Does the protecting function activate 3 Yes No Check the compressor If there is a short circuit between phase lines replace the compressor Faulty Normal Check the transistor Check the PCB2 gt Replace i a module 1 2 module Good Abnormal Repla
184. emoving fan guard net 9 1 4 Removing outdoor fan 9 1 5 Removing compressor 9 1 6 Replacing return oil circuit Strainer 9 1 7 Removing high pressure switch high pressure sensor and low pressure sensor 9 1 8 Removing reversing valve and removing reversing valve coil 9 1 9 Removing solenoid valve and solenoid valve coil 9 1 10 Replacing oil separator liquid tank and accumulator 9 1 11 Removing stop valve 9 1 12 Removing expansion valve coil SMGB0049 rev 2 08 2010 HITACHI Inspire the Next 67 68 68 70 73 74 82 83 85 86 89 89 90 92 93 94 100 101 102 110 110 114 159 165 171 173 174 176 176 178 180 181 189 190 191 192 193 194 195 196 202 203 203 204 205 206 208 218 220 223 226 230 234 236 Contents HITACHI Inspire the Next Service Manual 9 1 13 Removing thermistor forliquid pipe 238 9 1 14 Removing thermistor for ambient temperature 240 9 1 15 Removing electrical control box 241 9 1 16 Removing other electrical components 243 10 Main parts 251 10 1 Inverter 252 10 1 1 Specifications of inverter 252 10 1 2 Inverter time chart 254 10 1 3 Protective Function 255 10 1 4 Overload Control 256 10 2 Thermistor 257 10 2 1 Position of thermistor 257 10 2 2 Resistance value of the thermistor 257 10 3 Electronic expansion valve 259 10 3 1 Electronic expansion valve for the outdoor unit 259 10 4 Pressure sensor 260 10 5 Scroll com
185. enoid Valve Solenoid Valve SVA3 SVA2 Solenoid Valve SVC Solenoid Valve Solenoid Valve SVG Solenoid Valve Detailed figures SVA1 A B Brazing Removing Portion Brazing Removing Portion Brazing Removing Portion C Brazing Removing Portion Brazing Removing Portion e Brazing Removing Portion SMGBO0049 rev 2 08 2010 Outdoor units FSN2 229 HITACHI m Inspire the Next Service Manual E Removing solenoid valve coil 1 Remove one 1 screw fixing the solenoid valve coil If the portion is difficult to remove brazing with a Phillips screwdriver use a spanner or an adjustable wrench The adhesive was applied to the fixing screw for the solenoid valve coil before shipment to prevent looseness during transportation 2 Remove the screw fixing the solenoid valve and remove the solenoid valve 3 Remove the solenoid valve stay firstly before removing coils SVA1 to 5 SVB SVC SVG and SVF Screw v Solenoid valve coil bu x 9 1 10 Replacing oil separator liquid tank and accumulator Before starting this work turn OFF the power source of the unit 1 Remove the front service panel according to the item Removing front service panel 2 Collect all remaining refrigerant in the refrigerant cycle through refrigerant collecting system Both
186. ent display of the outdoor unit is not indicated Abnormal case If there is something wrong the 7 segment display of the outdoor unit displays the following indications Cause Indication Remarks a The indoor units are not supplied with power D continues to flash after 30 seconds Lt t b Disconnection of the operating line between V1 continues to flash after 30 seconds the outdoor units and the indoor units Lt t c Duplicated settings of the indoor unit number on the rotary switch RSW Refer to the section Troubleshooting by means of the Alarm Code for the description of the alarm code 35 SMGB0049 rev 2 08 2010 93 Initial troubleshooting HITACHI Inspire the Next Troubleshooting Service Manual E Emergency mode operation RAS 14FSN2 to RAS 48FSN2 Only 1 Emergency mode operation from Remote Control Switch If compressor fan motor is failed emergency operation mode is available to change from the remote control switch Even if the compressor is failed the air conditioning operation is continuously available until the troubleshooting is performed Alarms corresponding to emergency operation nverter compressor failure 06 Abnormality of inverter voltage 23 Failure of discharge gas thermistor 48 Inverter overcurrent protection activation 51 Failure of inverter current sensor 53 Transistor module protection activation 54 Failure of inverter fin thermistor Consta
187. ent is more than 150 of the rated current Rated Current x 150 i Rated Currentx 105 p See Se eS Se ee Time Internal protection Transistor module or IPM 1 Short Circuit Trip of Arm 2 Instantaneous Overcurrent Trip 3 Instantaneous Overcurrent Trip 4 Electronic Thermal Trip Condition is maintained longer than 30 seconds or accumulated longer than 3 minutes during 10 minutes sampling time Transistor module or IPM has four protection function for self protection 1 Some of the output terminals between U and V V and W W and U has a short circuit 2 Running current reaches the maximum rated current 3 Abnormal temperature is measured by internal thermistor 4 Control voltage decreases abnormally Overload Control Overload control as a current greater than Rated Current X105 Overload control release at a current smaller than Rated Current X 88 Fin Temperature Increase The unit is stopped when the IPM temperature is higher than 100 C Earth Detection The unit is stopped when the compressor is earthing G NOTE Characteristics are fluctuated by the current minimize control SMGB0049 rev 2 08 2010 Inverter 253 HITACHI Inspire the Next Main Circuit Power Source Frequency Instruction Output Voltage Soft Start Stop Frequency Failure Signal Activation of Protection Device Overload Signal Cha
188. er than the setting temperature 2 Is the fan actually running when Fo Failure of the fan motor airflow rate of fan is other than 0 Failure of the PCB Failure of the condenser 3 Is the Td1 higher than Td2 Td5 Incorrect connection or incorrect when only the compressor No 1 is mounting of the Td thermistor running when CC number of running compressors is 1 4 Is the total of iE indoor expansion Total of iE Low excessive refrigerant valves opening abnormally low or high horsepower of the outdoor High insufficient refrigerant unit X 0 7 to 1 5 excessive pipe resistance 5 Is TL liquid pipe temperature of the It is normal when Failure of the TL thermistor heat exchanger of the indoor unit lower TL Ti 5 deg Fully closed I U expansion than Ti air inlet temperature of the valve indoor unit Short circuit 6 Is TG gas pipe temperature of the heat It is normal when Failure of the TG thermistor exchanger of the indoor unit lower than TG Ti 5 deg Fully closed expansion valve Ti air inlet temperature of the indoor or slightly open I U expansion unit valve Short circuit 7 Is there any excessive difference It is normal if the difference Failure of the TL TG thermistor among indoor units at SH TG TL among units is within 7 Fully open expansion valve of the heat exchanger of the indoor deg lower than other units slightly open expansion valve or units It is applicable when the inl
189. erate Disconnected coil Failure of the indoor unit Measure the coil resistance by means of the tester Replace the Indoor unit fan fan motor Burnt out coil Measure the insulation resistance motor Disconnected coil Failure of the outdoor unit Measure the coil resistance by means of the tester Replace the outdoor unit fan motor Burnt out coil Measure the insulation resistance fan motor Failure of the magnetic Switch for the outdoor unit fan motor Insufficient contacting Measure the voltage between the contacting parts Replace PCB for the outdoor unit Failure of the comp motor Measure the resistance between two wires Failure of the comp Check for an abnormal sound from the Comp Replace the compressor Failure of the magnetic switch for comp Insufficient contacting Check that the magnetic Switch activates correctly or not Replace the magnetic switch Disconnected wiring to PCB Check the connections Correctly connect the wiring Failure of one of PCBs Failure of PCB Check PCB by means of the self check mode 1 Replace PCB if it failed The Comp does not stop or start even if the setting temperature on the LCD changes to 3 Failure of thermistor Failure of air inlet thermistor Disconnection of thermistor Abnormal operation of the remote control switch cord Check it by self checking 2
190. erate gt No Check the inverter Yes Does the compressor operate No Check the compressor and the power cable Yes Is the four way valve spindle No mounted at the middle position Replace the four way valve if faulty Yes Are the high pressure sensor No Replace the high pressure and the low pressure sensor OK gt sensor or the low pressure sensor if faulty l Yes Is there a leak in the solenoid Yes valve for the hot gas bypass Replace SVA if faulty SVA No Check whether the inlet air gt temperature is too low at the indoor units or the outdoor units Phenomenon Cause Check item Acton Turn OFF Main Switch Excessively low compression ratio Inverter is not functioning Check the inverter Repair the faulty part Compressor is not operating Check the compressor Replace the comp if faulty Valve stoppage at medium position of 4 way valve Measure the suction pipe temp of the 4 way valve Replace the 4 way valve if faulty Abnormal operation of the high pressure sensor or the low pressure sensor Excessively low air inlet temperature of the indoor unit Check the connector for PCB1 the power source and the pressure indication Check the indoor unit and the outdoor unit air temp thermistor Replace the sensor if faulty Replace the thermistor if faulty Leakage of the solenoid valve ou
191. ertified by JQA Japan Hitachi Air Conditioning Products M Sdn Bnd Lot No 10 Jalan Kemajan Bangi Industrial Estate 43650 Bandar Baru Bangi Selangor Darul Ehsan Malaysia Certification ISO 9001 Malaysia MEO MEBO HN Certification ISO 14001 Malaysia HITACHI Inspire the Next SMGB0049 rev 2 08 2010 Printed in Spain
192. ervice Manual HITACHI Inspire the Next No Item Indication Data Values Units 40 Discharge gas temp decrease I ya O not in operation protection degeneration control l 1 1 in operation 41 Discharge gas temp increase E Cc p 0 not in operation protection degeneration control am bt 1 41 in operation 42 Current protection r1 ya O not in operation degeneration control LI LU 1 in operation x10 Total accumulated hours of Hc in rm is compressor MC1 LL UC q 0 o times hours Total accumulated hours of Y 4 4 n x10 44 compressor MC2 LU nt OE Z i 0 9999 times for 14 to 48HP We Wee hours Total accumulated hours of P 4 4 n x10 45 compressor MC3 LU Ld a c i 0 9999 times for 18 to 48HP e hours Total accumulated hours of T T 4 n x10 46 compressor MC4 LU LI 4 i 0 9999 times for 26 to 48HP hours Total accumulated hours of Y r 4 n x10 47 compressor MC5 LU Ld alg i 0 9999 times for 44 to 48HP m hours x10 Total accumulated hours of td in rm 19 compressor MC1 LL bf U p 0 9999 times hours Total accumulated hours of Y 4 n x10 49 compressor MC2 Ziil Lm loc i 0 9999 times for 14 to 48HP hours Total accumulated hours of Y 4 4 n x10 50 compressor MC3 ILI LI lx i 0 9999 times for 18 to 48HP mS m m hours Total accumulated hours of id L
193. es Insufficient vacuum pumping time Icing inside tube at ex valve Water choking Generation of hydration and oxidation of oil Clogged Strainer etc insulation failure and compressor failure Pipe protection 1 Pinching 2 Taping l Flushing l Vacuum Drying One gram of water turns into gas approx 1000 Irs at 1 Torr Therefore it takes long time to vacuum pump by a small vacuum pump 2 Clean No dust Inside of pipes Infiltration of dust or other through the pipe ends Oxidation film during brazing without blowing nitrogen Insufficient flushing by nitrogen after brazing Clogging of expansion valve capillary tube and filter Oxidation of oil Compressor failure Insufficient cooling or heating compressor failure Pipe Protection 1 Mounting Caps 2 Taping 3 Pinching l Flushing 3 No leakage No leakage shall exist Brazing failure Failed flaring work and insufficient torque of squeezing flare Insufficient torque of squeezing flanges Refrigerant shortage Performance decrease Oxidation of oil wr Overheating of compressor I Insufficient cooling or heating compressor failure Careful Basic Brazing Work Basic Flaring Work Basic Flange Connecting Work Air Tight Test Holding of Vacuum sper Suspend the refrigerant piping at certain points and prevent the refrigerant piping from touching weak parts of the building such as walls ceiling et
194. es less than 70rpm for 5 seconds during operation Set air flow volume Hi before starting this check Does the indoor No mm 1 Turn OFF the power before checking the connectors m Check the connectors 1 If not PCB and the fan motor may be damaged i fan run Indoor unit PCB CN550 CN500 Also the LED4 must be turned OFF before starting this check to avoid electric shock PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Is LED4 on Insuffcient voltage for PCB OFF Faulty PCB microcomputer Replace PCB 2 Is DC power Is the voltage between 5V and GND of PCB supply for PCB No 4 75 to 5 25V gt upply ig Faulty PCB Is the voltage between 12V and GND of PCB Replace PCB correctly 2 11 9 to 12 8V Use a tester Note Use the following check points writen Yes in Japanese on the PCB Refer to the figure HA 5V next to DSW5 12V 12V next to HA connector GND next to IC6 do not use 280V15V GND 15V 5V oDSWS 06 GND z GND 280V 15V3 amp 3 1 CN500 Is DC power Is the voltage between CN550 1 and CN550 CN550 supply No 3 of PCB 280V 10 Use a tester 280V for PCB Faulty PCB correctly 3 PCB Indoor Unit PCB ps gt 4 Is DC power Is the voltage between CN550 3 and CN550 4 of PCB 14 8V to 15 8V supply
195. essor 1 5 after maintenance cUJ1 cUJ5 Procedure Press PSW1 for 5 seconds while the accumulated operation time of compressor data is displayed Example of compressor 1 PSW2 1 PSW3 E H H H cUJ1 Accumulated operation time of compressor 1 will be indicated PSW2 1 PSW3 H H A Press PSW1 for 5 sec while the accumulated operation time is displayed The indication will be changed to 0 The accumulated operation time of compressor 1 is 0 m X SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting HITACHI Service Manual Inspire the Next B Inverter primary current The inverter primary current is estimated from the running current of the compressor MC1 displayed on the 7 segment display as chart 380 415V 254 204 T t 154 Ead o gt E amp 104 Lower limit 3 t o p 0 5 10 15 20 Running current of compressor MC1 indicated on 7 segment E Displayed running current of the compressor MC2 MC3 MC4 MC5 The running current of the compressor MC2 MC3 MCA MC5 is detected by the current sensor CT2 CT5 rw Cause code of stoppage for the inverter content of check item J 7 Remark Cause of stoppage for gode Case corresponding unit Indication during retry Alarm code Automatic stoppage of the transistor module IPM Error overcurrent decrease voltage increa
196. et fully closed expansion valve air temperature is three degrees higher than the setting temperature 8 Is there any excessive different among It is normal if SH is within 3 Expansion valve locked in fully indoor units at SH TG TL of the heat deg lower than other units open position The refrigerant exchanger of the indoor units and is iE cycle number does not match lower than 7 Mismatched between wiring and It is applicable when intake air temp is piping 3 deg higher than setting temp 9 Is there any indoor unit with SH It is normal if SH is within Expansion valve locked in TG TL excessively lower than the 3 deg higher than other slightly open position or closed value of other units under the condition units expansion valve The refrigerant of IE indoor unit expansion valve cycle number does not match 100 Mismatched between wiring and piping 10 Is the temperature difference between I U more than 7 deg The temperature difference between I U means the following b3 Discharge Air Temp b2 Intake Air Temp indicated on the remote control switch by check mode SMGB0049 rev 2 08 2010 97 Test run HITACHI Inspire the Next Service Manual b Heating process if the outdoor temperature is higher than 0 C No Check item Standard Causes Result 1 Is oE1 0E2 outdoor unit expansion Total of oE1 oE2 total Low excessive refrigerant valves opening abnormally low or high freq
197. et parts T duct connecting kit Branch pipe Header Code 60199790 60199795 60199796 60199797 60199798 60199799 60199801 70522001 70522004 70522005 70522007 70522008 SMGB0049 rev 2 08 2010 Figure 60199791 60199793 60199794 em c TWEEN aE errr xi HITACHI Inspire the Next 0 HITACHI Inspire the Next Name HR 500 HR 800 HR 1000 HR 1500 HR 2000 STL 30 200 L600 STL 30 250 L600 STL 30 300 L600 STL 30 355 L600 STL 30 450 L600 xii Description Energy exchanger for KPI heat recovery Sound attenuator Heat energy recovery SMGB0049 rev 2 08 2010 Code 70550101 70550102 70550103 70550104 70550105 70550200 70550201 70550202 70550203 70550204 Figure Model codes Service Manual Units installation Service Manual 1 Units installation HITACHI Inspire the Next This chapter provides information about the procedures you must follow to install the Set Free FSN2 outdoor units Contents 1 Units installation 1 14 General installation notes 1 2 Transportation and handling 1 2 1 1 2 1 Hanging method Center of gravity 1 3 Outdoor units installation 1 3 1 1 3 2 1 3 3 1 3 4 1 3 5 Before installation Installation location oo 0o n A N gt Serial units installation 10 Multiple installation space 11 Foundations
198. eters lower than the location of the indoor units resetting of the DIP switch DSW3 is required However no setting was performed Therefore the largest discharge pressure was not increased This resulted in an insufficient cooling performance for the indoor unit Indoor units Insufficient cooling Outdoor unit Check DSW3 Countermeasure The setting of the DSW3 was changed Remarks Pay a special attention to the size of the liquid pipe if the lift between the indoor units and the outdoor units is higher than 20 meters Refer to Piping Work in TC for details 11 4 Alarm Code 31 ll Question and answer for the field work Example 3 Alarm code 31 Phenomenon Alarm code 31 sometimes occurred and the system stopped Cause The combination of the indoor units and the outdoor unit was the following ON Power source Y on agg OFF Fon on oN This system was used in a tenant building One of tenant s customers turned off the main switch for the indoor unit while other indoor units are running This results in a different setting of the total indoor unit capacity in the same refrigerant cycle Countermeasure All the main switches for the indoor units
199. ev 2 08 2010 69 Outdoor units Available optional H ITACH l functions Inspire the Next Service Manual B Input 1 Fixing heating operation mode Control function No 1 B Input 2 Fixing cooling operation mode Control function No 2 In the case that the fixing input terminals of the operation mode on the outdoor unit PCB1 are short circuited the operation mode can be fixed at the cooling or heating mode Short circuit between Terminals 1 and 2 of CN17 Fixed Heating Operation Mode Short circuit between Terminals 2 and 3 of CN17 Fixed Cooling Operation Mode During this fixed heating or cooling mode no cooling or heating operation is available The indoor units under the cooling or dry operation or heating operation will be changed to the Thermo OFF condition during this mode and stoppage code No 20 is given Setting Example Fixing Heating Operation at Input 1 between 1 and 2 pins of CN17 Fixing Cooling Operation at Input 2 between 3 and 2 pins of CN17 Outdoor unit PCB1 SS3 Operation mode fixing switch 3P Connector SS2 Changeover switch 1 CN17 1 5 Power source 3 3 Heat x2 Xi X2 Heat Cool Control circuit Wiring diagram example of fixing operation mode B Input 3 Demand stoppage Control function No 3 In the case that the demand input terminals on the outdoor unit PCB1 are short circuited compressor s is stopped In this case the indoor unit s is put un
200. event the discharge gas 5 B 3920k from overheating If the discharge gas temperature increases excessively the deterioration of the lubrication oil and its 3 G lubrication properties will occur This will cause a shorter zx 100 compressor life eg Bn b If the discharge gas temperature increases excessively the t compressor temperature increases In the worst case the 2 9 14 2 8 32 1 Q winding of the compressor motor will burn out 0 25 30 100 120 150 Temperature 9C Resistance characteristics of thermistor for discharge gas overheating protection c When the temperature of the upper part of the compressor increases during the heating process the unit is controlled according to the following method An electronic expansion valve of the liquid bypass opens and the high pressure refrigerant returns to the compressor through the accumulator This decreases the compressor temperature SMGB0049 rev 2 08 2010 257 Thermistor HITACHI al a Inspire the Next Service Manual Ifthe compressor upper part temperature increases exceeding 132 C even if an electronic expansion valve opens the compressor is stopped in order to protect the compressor d If the temperature of the upper part of the compressor exceeds 132 C for 10 minutes during the cooling process the compressor will stop according to the following method Operation EI Defecting period Cooling Over 132 C
201. ey only for air panel or Indoor Unit with To eee qo 7 5 CU Auto Louver gt Stop of Power to Y52C1 Y52C5 OFF Stop of Power to P CMC1 CMC5 OFF MC1 MCS MD Stop Power to CH2 CH5 ON Stop of L MOF1 MOF4 Power to for unit with drain pump CH1 ON Power to EHW OFF Pressing Power to YH2 OFF Only for RPC type RUN STOP Switch Power to gt MIF OFF RUN STOP Lamp OFF COOL Set Fan Speed amp Set Temp indication Continuously ON Electronic Ex Valve in I U and O U Fixed opening Power to solenoid valve STOP SVA ON for given lengh of time ee A NA Power to LCD indication LU OFF Power to PCB in I U OFF OFF T Power to O U OFF a Power to PCB in O U OFF Power to CH1 CH5 OFF Discharge 2 2 9 MPa Outdoor Fan speed gas pres sure Pd F 2 9 MPa one step up Discharge gas pres sure Pd Outdoor Fan speed one step down SMGB0049 rev 2 08 2010 Standard operation sequence Control system Service Manual HITACHI Inspire the Next
202. f Piping Length The total piping length RSW1 between the outdoor unit and indoor unit is set 2 DSW2 Setting of Capacity Code Outdoor unit capacity is set 7 DSW7 Setting of Power Supply according to nominal capacity HP 8 DSW8 Setting of Unit Model Code s psms gna ofian eee The ht drene S swe NuPrpamd 10 DSW10 Setting of Transmitting Test Running for Cooling or Heating An outdoor z A unit can be run for testing When testing has been 11 PSW1 Bios biis d bee plc did is finished reset the function y 9 4 DSW4 Forced Stoppage of Compressor When performing 12 PSW2 Check Switches m test running or inspection compressors can be 13 PSW3 When checking units checking items can be selected forcedly stopped to ensure safety by these switches Operation for Exchange Compressor 47 SEG1 These indicate the following alarm protective safety No 1 to No 5 of Dip Switch 5 are same as the SEG2 device has tripped or checking items DSW5 compressor No Select a compressor that is not used 5 Optional and then set as shown below Ex DSW5 No 2 OFF Function gt Comp No 2 OFF Judgement for Refrigerant Charge Setting of External Input Control Function No 51 Outdoor Units PCB HITACHI Inspire the Next 4 3 Protection and safety control Control system Service Manual 4 3 1 Compressor protection The following devices and their combinations protect the compressor High Pressure
203. f all the resistances are greater than 500kO it is normal SMGB0049 rev 2 08 2010 183 Procedure for checking each main part H ITACH i Troubleshooting Inspire the Next Service Manual E Checking of Fan Module Before this work check to ensure that LED201 Red of the PCB2 is off Disconnect all the wirings connected to the fan module as shown in the right figure 1 Disconnect the wirings of the connector of CN201 CN202 and CN203 from the fan module 2 Disconnect wirings of R S T U V W on the fan module 3 Measure the resistance between terminals using the tester Do not use a digital tester When measuring check the color of tester probe and the terminals to be measured as shown in the table below Tester probe Check for resistance Red Black vele TB3 T TB2 S TB1 R More than 1 kQ N S The resistance value N T increases by degrees after U P the indicator moves for a V P moment The resistance value W P increases by degrees between i n d CN201 j 1700KQ 1900 KQ i M Leave at least 30 seconds s LA White N W when measuring the next terminal TB6 W TB5 V TB4 U LED201 CN203 CN202 White Red NOTE 1 Do not apply great force when removing the fan module or the brazing will be fallen apart and a malfunction of the fan module may occur 2 Identify the terminal Nos with the mark band Nos when reassembling If incorrectly connected
204. f the Yee Are the connectors 2 of the outdoor unit heat exchanger s electric expansion valve connecte properly to PCB1 Refer to Characteristics of thermistor see next page See position of the thermistor in the next page ye es Is the refrigerant correctly charged gt js Is the gas leaking yes Repair the leaks of gas Correctly charge the refrigerant SMGB0049 rev 2 08 2010 Troubleshooting procedure Remove the sudden changes of load like short path of an outgoing air to the air intake of the outdoor unit or the cause of frequent thermo ON OFF Plug the connectors properly 2 See connector numbers in the next page No No Charge the correct refrigerant volume Refer to TC Check the exp valve 127 HITACHI Inspire the Next Bi Position of the Thermistor Troubleshooting Service Manual Thermistor ref Display Drive Nurab ol ct Unit HP Thermistonpositian a compressors l a THM8 Fdi Inverter 1 8 12HP gt THM9 rag 2 14 16HP W raum TMA Piera Constant eee THM13 raft speed 4 30 36HP THM18 ros 5 38 48HP Phenomenon Cause Check item Action Turn OFF the main switch Excessively high discharge gas temperature at top of compressor Ref cycle is different from the electrical system Check the ref cy
205. fer to the item Input 3 Demand Current Control The table below is the limit of the running current for this function Control Function No Demand Running Current Control 1to5 10096 6 6096 7 7096 8 80 9 100 This function can be activated when demand function is selected at one of the input terminal indications wand 3 In case that multiple demand functions are set at the input terminal indications v and 3 the demand running current is selected as below Demand Control 6 gt 7 gt 8 gt 9 Control Function No Adopting self demand function which drastically decreases power consumption has largely improved energy saving Power consumption Morning Maximum efficiency is secured within the power setting range Daytime Operating hours Excesive power supply consumption exceeding the power setting range is restricted q Power setting Selectable from 100 80 70 and 60 of the rated power consumption for cooling operation Nigth SMGB0049 rev 2 08 2010 Outdoor units Available optional functions HITACHI Inspire the Next Service Manual E Wave function setting Press PSW1 and select the setting condition 1 so that the wave function setting LIE While this function is activated the maximum limit of running current is changed from 60 to 100 as shown in the figure Wave function cannot be available whe
206. ferent from the electrical system Check the ref cycle and the electrical system Repair the wiring Overcharged refrigerant Measure the pressure Refer to Test Run of SM Correctly charge the refrigerant Faulty Ex valve Check expansion valve refer to procedure of checking other main parts Replace the ex valve if faulty Fault Replace POB T and eec Ne Replace PCB if faulty operation Faulty PCB Disconnected Wires TONG Check the connections Repair the wiring connection Ex valve control Fault Check thermistor Replace the thermistor if faulty Faulty Incorrect Check the mounting state discharge gas Correctly mount the thermistor mounting Refer to Alarm code 07 thermistor correct Remove looseness Replace Check the connections the connector or repair the connection i connections SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description va Excessively high discharge gas temperature at the top of the compressor LL chamber W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm is displayed when the following conditions occur three
207. frigerant 13 Ifthere is no refrigerant oil in the charge hose at the oil may leak from the removing part of flare nut if the release side it may remain in the oil separator procedure on the left may not be followed Apply pressure gradually with nitrogen gas from the check If the refrigerant at the high pressure side remains joint at low pressure side push the refrigerant oil in the oil pressure from check joint at low pressure side should separator with the pressure and take it out from charge be applied lower than the one from check joint at high hose at the release side pressure side 14 Perform replacing comp return oil circuit and electrical parts Removing electrical box may be required With the electrical box mounted check the wirings by 15 contacting except the power line for comp For the power line for comp insulate the wiring terminal with vinyl tape 16 Turn ON the main switch of O U This process is before removing or after mounting the electrical box 17 Turn DSW4 4 ON of O U PCB1 Turn DSW4 6 ON of O U PCB1 Power supply is ON auto address setting is completed and 18 then STP is flashed on 7 seg O U PCB1 SVA is ON open Charge the refrigerant oil Calculation for recharge quantity of refrigerant is Perform the vacuuming from the check joint at low and high required if process No 12 is performed Refer to the item pressure sides Removing compressor for calculating metho
208. fter work Spindle Valve Counterclockwise open Clockwise close Closed before shipment IN O ring rubber Check Joint a Only the charging hose can be connected Tighten the cap with a torque of 9 8 N m Refrigerant piping Tightening torque Allen key size mm HP Liquid valve N m Gas valve N m HP Liquid valve Gas valve 8 38 0 44 1 8 14 4 10 10 16 38 0 49 0 16 22 5 10 18 32 38 0 58 8 24 48 10 10 34 48 44 1 70 0 As for Allen keys of 5 and 10 mm use field supplied keys A CAUTION During the test run fully open the spindle If it is not fully opened the devices will be damaged Do not apply force to the spindle valve at the end of opening 5 Nm or smaller The back seat construction is not provided SMGB0049 rev 2 08 2010 Piping work considerations Piping installation HITACHI Service Manual Inspire the Next The most important work in the refrigerant piping installation work is the brazing of the pipes If it accidentally occurs a leakage due to a careless brazing process it will cause clogged capillary pipes or serious compressor failure In order to guarantee a proper brazing neck between different pipes surfaces accurate pipe dimensions after the expansion process see the table below It is important to control the clearance of the pipe fitting portion as shown below In the case that a cooper tube expansion jig
209. g temp during heating C _ 4 yg SMGB0049 rev 2 08 2010 160 Troubleshooting procedure l 9 Indoor unit air inlet temp a zn rj Normal Temperature displayed at thermistor C LU LL i Thermistor is open circuited 3 Indoor unit discharge air L II Abormal T orPCBis defective temp at thermistor C bt ml at of l um Temp for top of comp Indoor unit heat EE Ud 4 exchanger liquid pipe h H ci i EE Thermistor is short circuited o r or PCB is defective or J ni Ln Ln o 5 m Temp for top of comp ni Refer to section 7 3 1 Self Checking Procedure of PCB by means of the Remote Control Switch During the transient periods such as starting time and other the indicators or Zi may be displayed for a limited time This is indicated only when a remote sensor is connected The indicator is normally displayed i RPK series cannot connect a remote sensor rn Therefore the indicator is 9 Control information Eu Pese l This indicates the internal information for the remote control Discharge gas temp Switch In case of SET FREE this indication shows the operation 10 at the top of the comp h H H H L compressor quantity chamber C m Ex During the operaton of several compressors the aver
210. garding the setting value of activation current refer to the item Specifications of inverter 2 Regarding replacing or the checking diode module refer to the item Procedure of checking other main parts 3 Regarding replacing or the checking method for inverter parts refer to the item Procedure of checking other main parts SMGB0049 rev 2 08 2010 151 Troubleshooting procedure Troubleshooting HITACHI Inspire the Next 0000000000000 Service Manual Alarm code Description H H Activation of inverter overcurrent protection device 2 W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 The alarm code is indicated when instantaneous overcurrent trip occurs at six times within 30 minutes Retry operation is performed up to five times Conditions of Activation Inverter current with 150 of the rated current PCB1 Control PCB in Outdoor Unit PCB2 Inverter PCB Turn off power and disconnect U V No Restart operation W from compressor Faulty Does it trip soon tiros terminals Check PCB2 Replace PCB2 rer Turn ON 1 of DSW1 1 ow on PCB2 and restart It trips No It
211. gerant is required Perform the vacuuming from the check joint at low and high if process No 4 Work 2 is performed Refer to the item pressure sides Removing Compressor for calculating method Connect the charge hose to the charge port of return oil Use a clean charge hose circuit and charge the refrigerant oil Use a container with a small opening so that the refrigerant oil does not absorb the moisture in the atmosphere Ifthe refrigerant oil is not clean it should be changed as new one 12 Disconnect the charge hose from the charge port of return oil circuit Perform the vacuuming from the check joint at low pressure side 13 Turn OFF the main switch of O U 14 Set DSW4 4 6 back to the original setting Refer to Process No 9 and 10 15 Check that the power line for comp and wiring are connected correctly 16 Recharge the collected refrigerant Process No 4 from the check joint at high pressure side For the remained quantity Open the liquid and gas stop valve completely and set DSW4 1 to ON side O U PCB1 Then recharge it from the liquid stop valve check joint during cooling operation 17 Check the liquid and gas stop valves are open completely O U Outdoor Unit LU Indoor Unit 7 Seg 7 Segment Comp Compressor SMGB0049 rev 2 08 2010 99 Initial troubleshooting HITACHI Inspire the Next E The LED and the LCD are not indicated E Not operated Troubleshooting Service Manual
212. going air to the air intake of the outdoor unit or the cause of frequent thermo ON OFF Are the connectors 2 of PCB1 of the outdoor unit heat exchanger s electric expansion valve No Plug the connectors 2 of PCB1 properly 1 Refer to Characteristics of Thermistor of Alarm Code 23 2 PCB1 Connector No is shown in the below MV1 MV2 MV3 MV4 MVB RAS 8 12FSN2 CN10 CN12 RAS 14 24FSN2 CN10 CN11 CN12 RAS 26 42FSN2 CN10 CN11 CN20 CN12 RAS 44 48FSN2 CN10 CN11 CN20 CN21 CN12 Is the refrigerant correctly charged connected properly No Charge the correct refrigerant volume Refer to TC yes Is the gas leaking ig No ag Check the exp valve pe Repair the leaks of gas Correctly charge the refrigerant SMGB0049 rev 2 08 2010 Troubleshooting procedure 125 HITACHI Inspire the Next Bi Position of the Thermistor Troubleshooting Service Manual Thermistor ref Display Drive Nurab ol ct Unit HP Thermnistonpositiona compressors THM8 raf Inverter 1 8 12HP lo THM9 rag 14 16HP Hic d r a mr M TEMIA EE Constant 3 Sepe MN THM13 Fu speed 4 30 36HP THM18 rs 5 38 48HP a J Phenomenon Cause Check item Action Turn OFF the main switch Decrease of the discharge gas superheat Ref cycle is dif
213. gure for RAS 12FSN2 figure for RAS 24FSN2 RVR1 RVR2 RVR EL E MEE i Esl a GASES 7 E if RAS 26FSN2 to RAS 42FSN2 figure for RAS 42FSN2 RVR1 RVR2 RAS 44FSN2 to RAS 48FSN2 figure for RAS 48FSN2 RVR1 RVR2 j i ES UIS AIN Seek ZA E E L T BESTES NNN Reversing Valve Fixing Position SMGB0049 rev 2 08 2010 Outdoor units FSN2 223 HITACHI Inspire the Next E Removing reversing valve 1 Before starting this work collect the refrigerant into a cylinder from the refrigerant cycle and turn OFF the power source of the unit Remove the four 4 screws fixing the electrical control box cover Remove the electrical control box cover Disconnect the connecting wiring for reversing valve Coil Remove the reversing valve coil according to the item Removing Reversing Valve Coil Remove the brazing as shown in the figure by covering the reversing valve with wet cloth for cooling NOTE Remove the brazing only at the indicated portion in the figure If not le
214. h and indoor unit is not connected HIGH m moe The alarm code that identifies the last fault that has occurred in Unit number COOL LE Ul j n the displayed unit and alarm code m B The unit number of the connected unit or the unit number for displayed GE which the checking mode was selected previously ADDS Number of the Indoor Unit in No Cycle After RN No Refrigerant Cycle seven A Within seven seconds to check Forward seconds another unit Press the switch to increase from 00 to 01 to 02 HIGH Backward 2n COOL col l Press the O switch to decrease from 15 to 14 to 13 Check mode 1 aC Ld CHECK E Press amp to see the previous indication E Press to see the next indication COOL ist r4 pi AIC CHECK Pres OK for more than 3 seconds y hie nin m7 Unit number COOL Li LL 1 Press to see the next data ADDS RN fanl Jan and alarm code AG Press amp to see the previous data displayed CHECK After seven See A seconds HIGH T ANE Check mode 2 COOL es Press Refer to Check NE CN mode 1 for details Pres OK for more than 3 seconds Check mode disabled n the Check mode 2 the data of the first three units that are connected serially to a remote control switch are available HIGH COOL HN up us You can press the OK switch to disable the Check mode 2 AIC Check mode 1 cannot be disabled even if you press the
215. hat the high pressure switch PSH does Draw the lead wire for high pressure switch PSH not contact with the waterproof cover aluminium and attach the Td thermistor Pull out the wires from sheet the dent part at the top of waterproof cover Example Wire is caught on the spring Waterproof cover Track for Pad heater fitting Oil heater Oil heater Compressor Aluminium sheet lead line Spring Hook Power line o Waterporoof HL healer Oil discharge pipe Power line Track Oil heater lead line NOTES 1 Attach the oil heater firmly to the compressor and fix it with spring as shown in the figure 2 If there is a clearance between the oil heater and the compressor due to wire overlapping excessive heat is generated there Then oil heater is failed due to overheating When mounting the reassembled oil heater this point should be taken into account 3 If the oil heater lead wire is caught on the spring the lead wire may be cut due to vibration When reassembling attention should be paid to the lead wire Fix the cover firmly with two tacks to avoid water entering from the clearance between waterproof cover and the top cap Example Top cap Suction pipe Dent part For for Td thermistor oe lead wiring P Dent part For PSH lead wire Fix top cap with tacks and bing laces 4 portions Waterproof cover SMGB0049 rev 2 08 2010 Outdoor units FSN2 Servicing
216. he wiring Connect the wiring correctly compressor operates Failure of AC chopper Check AC chopper Replace AC chopper 1 Refer to chapter 10 of TC SMGB0049 rev 2 08 2010 109 Initial troubleshooting HITACHI Inspire the Next 7 2 Troubleshooting procedure Troubleshooting Service Manual If the RUN LED flickers for 2 seconds there is a failure in the transmission between the Indoor Unit and the Remote Control Switch Possible causes are Broken remote cable Contact failure in the remote control cable Defective IC or defective microcomputer Abnormal Indoor Unit No Abnormal Refrigerant Cycle No In any case ask your retailer for service If the RUN LED flickers 5 times 5 seconds with the unit number and the alarm code displayed make a note of the alarm code refer to the table below and ask your retailer for service Bl Alarm code table Prin Wm COOL MED f tks t n l JE Alarm Code AIC ABNL Indicated for Model Code a second alternatively n om 7 Model Code CooL IMED Ars ft i 2 Indication Model AIC ABNL H Heat Pump P Inverter Connected number of Indoor Units F Multi E Cooling Only E Others L KPI Code No Category Content of Abnormality Leading Cause 01 Indoor Unit Activation of Protection Device Activation of Float Switch High Level in Drain Pan 02 Outdoor Unit Activatio
217. heck 32 3 2 Electrical wiring for the outdoor unit 33 3 2 1 Electrical wiring connection for outdoor unit 33 3 2 2 Setting the DIP switches for the outdoor unit 34 3 3 Common wiring 38 3 3 1 Electrical wiring between the indoor unit and the outdoor unit 38 3 4 Wire size 40 3 5 Electrical wiring diagrams 42 Control system 47 4 1 Device control system 48 4 1 1 RAS 8 48FSN2 refrigerant cycle control 48 4 2 Outdoor Units PCB 51 4 2 1 RAS 8 48FSN2 51 4 3 Protection and safety control 52 4 4 Standard operation sequence 53 4 4 1 Cooling process 53 4 4 2 Dry operation 55 4 4 3 Heating process 57 4 4 4 Defrost operation control 59 4 5 Standard control functions 60 4 5 1 Freezing protection during cooling process or dry operation 60 4 5 2 Protection control in cooling and dry operation 61 4 5 3 Compressor operation control 62 4 5 4 Outdoor fan control during cooling operation 64 4 6 Restricted control for Outdoor Units 65 SMGB0049 rev 2 08 2010 6 1 6 2 6 3 6 4 7 2 7 3 8 1 8 2 8 3 8 4 8 5 8 6 8 7 Contents Service Manual Available optional functions Outdoor units 5 1 1 Setting of external input and output functions 5 1 2 Description of external input signals 5 1 8 Description of external output signals 5 1 4 Optional functions Test run Checking procedure before the test run Test run procedure from the outdoor unit side Check list Judgement systems for refrigerant am
218. hen winding bind lace at tack Do NOT contact discharge oil pipe with oil heater lead line and power line for compressor zi Cover outside of discharge oil pipe when winding waterproof cover Water proof cover Details of inverter compressor Details of constant speed compressor oil heater harness wiring oil heater harness wiring xC Fix compressor power line and oil heater lead wire Waterproof cover together with a bind lace Waterproof cover B Wind oil heater at 5 mm B T above welding part e Inverter pd compressor Same with X C Oil heater compressor bind oil heater firmly around the compressor bottom part Same with x B Constant speed E d compressor d The distance between oil heaters should be min 20mm XA Same with X A Pull out oil heater lead wire from waterproof cover dent part without contacting with bolt nut or pipe of com pressor MI SMGBO0049 rev 2 08 2010 Outdoor units FSN2 217 HITACHI Inspire the Next Turn OFF all power source switches before starting 1 2 Remove the front service panel according to the item Removing Front Service Panel Collect all remaining refrigerant in the refrigerant cycle through refrigerant collecting system Both high and low pressure sides Remove the flare nut A as shown in the below figure or
219. i 4 n x10 51 compressor MCA IE LI LI oc i 0 9999 times for 26 to 48HP TR ax hours Total accumulated hours of b lela nm x10 52 compressor MC5 ILI ot alz i 0 9999 times for 44 to 48HP hours 53 The latest alarm code cause of rm ri 9 99 stoppage at outdoor unit mt L Lt Cause code of stoppage at r d a 94 inverter J J jn E 916 55 Cause code of stoppage at fan ef m Wwf r1 0 16 motor controller 1 J J hm I bt 56 Cause code of stoppage at fan Ir mom f 9 16 motor controller 2 J Qh in SMGB0049 rev 2 08 2010 Troubleshooting procedure 169 Troubleshooting HITACHI Inspire the Next Service Manual No Item Indication Data Values Units Hystory No 1 E Wt r1 ya Integrated hours at alarm in The latest failure JU Et Lt I indicated r 318 E 5 Hystory No 2 r yc l i d H l H H Cause of stoppage ES a m o 57 Failure E amp history if IS gt 0 E ITC indication 8 3 c ig Hystory No 15 wale Joe E 5 The oldest failure ye Et Z0 FT indication 58 Total capacity setting of indoor Ded pa in Ir 7 5 9999 x1 8HP unit L J l LU Lt Total quantity of combined rnm pa pa 99 indoor unit yey ve on 0764 units p pa ri a 60 Address of refrigerant system Li rm Lt 0 63 Return to Start SC E Reset for accumulated operation time of compr
220. ication HIGH SiNG LOWER SET TEMP TZI Iiu yy HEAT X c T rm A C 1 5 C NOTES Emergency operation is available only when all the indoor unit and remote control to be connected are for H LINK II Emergency operation is available only for when the alarm codes above are indicated The emergency operation does not correspond to the failures of inverter PCB or fan controller This operation is an emergency but a temporary operation until the service people comes If the alarm is indicated again during the emergency mode operation the alarm cannot be canceled Troubleshooting Service Manual 2 Emergency mode operation from PCB for inverter compressor failure This operation is an emergency operation by the constant speed compressor when the inverter compressor is failed Alarms corresponding to inverter compressor failure 04 Abnormality of inverter transmitting 06 Abnormality of inverter voltage 23 Failure of discharge gas thermistor 48 Inverter overcurrent protection activation 51 Failure of inverter current sensor 53 Transistor module protection activation 54 Failure of inverter fin thermistor a Procedure 1 Turn OFF all the main switches of outdoor and indoor units 2 Check the inverter PCB If inverter PCB is faulty disconnect the wiring U V W of diode module Insulate the disconnected terminals 3 Tum ON DSW5 1 of outdoor unit PCB1 4 Turn ON
221. if ES epu 1 Pu JF 2 High pressure 5 sensor Pd We Constant speed sw al compressor MC5 Constant sp compressor MC4 Constant speed compressor MC3 Constant speed Inverter Compressor compressor MC2 MC1 Low pressure sensor Ps RAS 42FSN2 to RAS 48FSN2 High pressure High pressure High pressure High pressure compressor PSH4 compressor PSH3 compressor PSH2 compressor PSH5 High pressure High pressure e 2 ZA Z4 M SAN cd compressor PSH1 sensor Pd h f aa M NY an pep LA 2 Constant speed compressor MC5 Constant speed compressor MC4 Constant speed compressor MC3 Constant speed compressor MC2 Inverter c mpressor 7 MC1 Low pressure sensor Ps High pressure switch high low pressure sensor position SMGBO0049 rev 2 08 2010 Outdoor units FSN2 221 HITACHI Inspire the Next E Removing high pressure switch 1 Collect the refrigerant 2 Disconnect the faston terminals 3 Remove the high pressure switch from the brazing part of the discharge pipe by use of a burner NOTES Ifthe refrigerant cycle is left for some time after compressor is removed moisture and dirt will enter into it Reassemble the alternative compressor immediately after removing If it is impossible by necessity
222. in the reverse procedure for removing NOTE If the upper cover is not fixed properly it may cause upper cover vibration during the outdoor fan operation Check the upper cover carefully after reassembling To electrical control box Remove upper cover Thermistor position Ta Thermistor for ambient temp Thermistor holder Air intake grille Side panel Removing screws for upper cover Example RAS 48 FSN2 Remove screws Remove screws Remove screws Remove screws Remove screws Remove screws Remove screws Remove screws Unit front side SMGB0049 rev 2 08 2010 240 Outdoor units FSN2 Servicing Service Manual 9 1 15 Removing electrical control box 1 Remove the front service panel according to the item Removing Front Service Panel 2 Remove four 4 screws of each electrical control box cover and remove the electrical control box cover NOTES When removing the screws fixing the electrical control box cover hold the cover not to fall Pay attention not to be injured with the service panel edge when removing 3 Loosen clamps for the electrical wiring at the electrical control box bottom side and release them NOTE When reassembling fix the wiring at the original position without contacting the plate RAS 8FSN2 to RAS 12FSN2 Electrical control box Fixing screw for electrical control box cover
223. in O U OFF LCD indication OFF 22 9 MPa F 2 9 MPa Discharge gas pres sure Pd Outdoor Fan speed one step up Outdoor Fan speed one step down SMGB0049 rev 2 08 2010 Power to CH1 CH5 OFF Standard operation sequence Control system HI ITACH l Service Manual Inspire the Next Power to O U ON Is phase correct Reverse phase gt Power to CH1 CH5 Alarm Code 05 Power to O U OFF Correct phase Auto louver 0 Only or indoor units with auto louver Reset J Power to PCB in O U ON Power to Power to PCB in 7 Start of Transmission between I U ON I U ON 9 O U I U and Remote Control Switch Setting at RES HEAT HEAT indication High HIGH indication Setting fan flow Medium speed changeover switch MEDIUM indication Low i LOW indication iue gt A switch Increasing Set Temp u eae WV Switch Decreasing Set Temp Set Temp indicated H es LED ON RUN is nated Pressing RUN STOP Gr Power to YH2 for for Unit with drain pump 38 48HP Power to MC5 ON JM Power to Y52C5 ON gt C Power to CH5 OFF E Outdoor fan 30 48HP MOF 80748 Power to Y52C4 ON gt C co aN D Air flow 100 for 1
224. iner Clogging at the low Check the temp Remove the clogging pressure piping difference Insufficient air flow to the indoor unit heat exchanger Check for clogged air filter Clean the air filter Check for an obstacle at the inlet or the outlet Remove the obstacles Excessively low air temp to the indoor unit heat exchanger Insufficient speed of the indoor unit fan motor Short circuited indoor unit air Replace the fan motor Remove the cause of the short circuited air SMGB0049 rev 2 08 2010 Initial troubleshooting 105 HITACHI Inspire the Next Abnormal operation of the devices Cont Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch Insufficient cooling process Excessively high discharge pressure Insufficient air flow to the outdoor unit heat exchanger Clogging of the outdoor unit heat exchanger Remove the clogging Obstacles at inlet or the outlet of outdoor unit heat exchanger Remove the obstacles Is the service area for the outdoor unit sufficient Secure the service area Correct fan speed Replace the fan motor Excessively high air temp to the outdoor unit heat exchanger Short circuited air to the outdoor unit Remove the cause of the short circuited air Any other heat load near the outdoor unit Remove the heat source Excessively cha
225. ing installation 2 1 Piping work considerations 2 1 1 2 1 2 2 1 3 2 1 4 2 1 5 HITACHI Inspire the Next 17 18 Copper pipes and sizes 18 Three principles on refrigerant piping work Suspension of refrigerant piping 21 21 Tightening torque 22 Brazing work 23 2 2 Outdoor units piping installation 2 2 1 2 2 2 2 2 3 2 24 2 2 5 2 2 6 24 Factory supplied accessories 24 Position of piping connections Flange piping connection 25 26 Piping connection 27 Vacuum and refrigerant charge 28 Drain discharging boss SMGB0049 rev 2 08 2010 17 29 HITACHI Piping installation Inspire the Next Service Manual 2 1 Piping work considerations 1 Prepare locally supplied copper pipes 2 Select the piping size with the correct thickness and correct material which can have sufficient pressure strength Use the table below to select the required pipe Nominal Diameter Thickness mm Copper type mm in 6 35 1 4 0 80 Roll 9 53 3 8 0 80 Roll 12 70 1 2 0 80 Roll 15 88 5 8 1 00 Roll 19 05 3 4 1 00 Pipe 22 23 7 8 1 00 Pipe 25 40 1 1 00 Pipe 28 60 11 8 1 00 Pipe 31 75 11 4 1 10 Pipe 34 93 1 3 8 1 25 Pipe 38 10 11 2 1 35 Pipe 41 28 1 5 8 1 20 Pipe 44 45 13 4 1 55 Pipe 7 NOTE In case of using copper pipes for piping sections bigger than 19 05 mm 3 4 inches fla
226. ing or harmful gases would occur if a fire was being used in the room An excess or a shortage of refrigerant is the main cause of trouble to the units Charge the correct refrigerant quantity When the base of the outdoor unit is temporarily utilized as a drain receiver and the drain water in it is discharged this drain boss is utilized to connect the drain piping Model Applicable model Outdoor unit HP Drain kit quantity units 932 8 12 4 14 24 8 26 42 12 y 44 48 16 L DBS 26 43 xj _ E E Connecting the drain discharging boss Insert the rubber cap into the drain boss up to the extruded portions Insert the boss into the unit base and turn approximately 40 degree counterclockwise Size ofthe drain boss is 32 mm O D Adrain pipe should be field supplied 7 NOTE Do not use this drain boss set in a cold area because the drain water may freeze This drain boss is not sufficient to collect all the drain water If collecting drain water is completely required provide a drain pan that is bigger than the unit base and install it under the unit with drainage In order to guarantee the proper condensate draining the siphon installation is very important SMGB0049 rev 2 08 2010 Outdoor units piping installation 29 Electrical wiring Service Manual 3 Electrical wiring
227. ing refrigerant of outdoor unit is required Perform the replacing compressor and oil return circuit if necessary dea Procedure Remarks 1 Turn OFF the main switch of O U 2 Connect manifold to the check joint at low and high Not the check joint of liquid gas stop valves pressure sides of O U 3 Close the liquid and gas stop valve completely To improve the performance of vacuuming 4 Work 1 Collecting refrigerant in O U The discharge of the refrigerant in the atmosphere is Collect the refrigerant from check joint at high and low strictly forbidden Make sure that the refrigerant is collected pressure sides using the collector by the collector Work 2 Collecting refrigerant oil in oil separator Measure the quantity of the collected refrigerant and Oollecting refrigerant oil in oil separator refrigerant oil Connect the charge hose to the charge port of return oil For the replacing comp and return oil circuit circuit Perform Work 1 firstly and then Work 2 Take out the refrigerant oil from the charge hose at the Measure the collected refrigerant oil release side to the oil pan Check that no refrigerant oil remains in the oil separator Ifthere is no refrigerant oil in the charge hose at the when replacing the return oil circuit The refrigerant oil may release side it may remain in the oil separator leak from the removing pa
228. ing with IEC 61000 3 12 RAS 40FSN2 RAS 12FSN2 4602 RAS 14FSN2 4264 RAS 16FSN2 3757 This equipment complies with IEC 61000 3 12 provided that RAS 18FSN2 3081 the short circuit power Ssc is greater than or equal to xx see RAS 20FSN2 2236 Ssc column at the interface point between the user s supply RAS 22FSN2 6179 and the public system It is the responsibility of the installer RAS 24FSN2 5552 or user of the equipment to ensure by consultation with the RAS 26FSN2 5395 distribution network operator if necessary that the RAS 28FSN2 4767 equipment is connected only to a supply with a short circuit RAS 30FSN2 4297 power Ssc greater than or equal to xx see Ssc column RAS 32FSN2 3826 RAS 34FSN2 3198 RAS 36FSN2 2571 RAS 38FSN2 1787 Installation restrictions may be applied by supply authorities in relation to harmonics RAS 42FSN2 n 5 RAS 44FSN2 This ese unit s is are out of scope of IEC 61000 3 12 RAS AGFSN2 RAS 48FSN2 4 Check to ensure that the power supply voltage is within 10 of the rated voltage 5 Check the capacity of the electrical wires If the power source capacity is too low the system cannot be started due to the voltage drop 6 Check to ensure that the ground wire is connected SMGB0049 rev 2 08 2010 General check Electrical wiring HITACHI Service Manual Inspire the Next 3 2 Electrical wiring for the outdoor unit E FSN2 The electrical wiring connection for the outdoor uni
229. inutes and the alarm occurs two or more times in one hour gt Yes gt No gt PCB1 PCB Control PCB in Outdoor Unit Indoor Unit PCB Is the amount of refrigerant correct No Is the outdoor unit stop valve open Yes Correctly charge the refrigerant Open the stop valve Yes Is the refrigerant leaking Repair the leaks ii No Is the suction pressure sensor No Replace the suction pressure normal dl sensor if faulty l Yes Are the electronic ex valves fully closed and locked Check the connection of the connectors and the circuit board Replace the electronic ex valves if faulty lt lt lt Yes gt Check the outdoor electronic expansion valve during the cooling process and the indoor electronic expansion valve during the heating process No Note In the case of H LINK connection check the refrigerant cycle setting on the outdoor unit PCB1 and the indoor unit PCB Check whether the connections of the electric wiring and the refrigerant piping between the indoor unit and the outdoor unit are wrong Action Phenomenon Turn OFF Main Switch Cause Check item Shortage of refrigerant Check the volume of charged refrigerant or check for leakage Repair the leakage and correctly charge Closed stop valve Check the stop valve Open the stop valve
230. ions Applicable to the models For the main cycle of RAS 8 48FSN2 Type UKV 10 0 USRT Series UKV 5 0USRT Series for MVB Refrigerant R410A Working temperature range 30 C 65 C Operation time of the coil less than 50 Mounting direction Drive shaft in vertical direction within an angle of 45 as maximum Flow direction Reversible Drive method 4 Phase canned motor method Rated voltage DC12V 1 8V Drive condition 80 5PPS Pulse width at ON 36mm sec OFF 60mm sec 1 2 Phase excitation Coil resistance each phase 460 3Q at 20 C Wiring diagram Drive circuit and activation mode Wiring diagram Drive DC12V circuit Activation SMGB0049 rev 2 08 2010 259 Electronic expansion valve 10 HITACHI Inspire the Next 10 4 Pressure sensor Main parts Service Manual High pressure control A high pressure sensor detects the high pressure during the heating process The PID control with the operation capacity of the indoor units controls the compressor frequencies This way the high pressure is controlled within an appropriate range The output of the high pressure sensor during the heating process performs the protective control and the control of the gas bypass valve Heating process TNI ae l a e as PID control for compressor frequencies with the operation capacity of the indoor unit
231. ip switch setting of the refrigerant cycle No DSW1 amp RSW1 O U DSW5 amp RSW2 I U and the unit number RSW for the indoor units apply to the system Confirm that the dip switch setting on the printed circuit board of the indoor units and the outdoor units are correct Especially pay attention to the setting of lift between indoor units and outdoor unit the refrigerant No and the end terminal resistance Refer to the chapter Electrical Wiring F Check to ensure that the electrical resistance is more than 1 megohm by measuring the resistance between ground and the terminal of the electrical parts If not do not operate the system until the electrical leakage is found and repaired Do not impress the voltage on the terminals for transmission 1 and 2 G Check to ensure that each wire L1 L2 L3 and N R S and T is correctly connected at the power source If incorrectly connected the unit will not operate and the remote control switch will indicate the alarm code 05 In this case check and change the phase of the power source according to the attached seat on the reverse side of the service cover H Check to ensure that switch on the main power source has been ON for more than 12 hours to warm the compressor oil by the oil heater E FSN2 series outdoor units does not operate within 4 hours after power supply Stoppage Code d1 22 In case of operating within 4 hours release the protection control as follows 1 Supply
232. iping Thermistor 16 Remote thermistor Thermistor ERE 17 Built in thermistor at remote control switch 19 Fan motor Activation of Protection Device for Outdoor Fan Fan Motor Overheat Locking 21 High Pressure Sensor 22 S Outdoor Air Thermistor ensor on 23 Outdoor Unit Discharge Ga Thermistor on Comp Incorrect Wiring Disconnecting Wiring 24 Evaporating Piping Thermistor 29 Low Pressure Sensor 110 SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting HI ITACHI Service Manual Inspire the Next Code No Category Content of Abnormality Leading Cause 31 Incorrect Setting of Outdoor and Indoor Unit Incorrect Setting of Capacity Combination 35 Incorrect Setting in Indoor Unit No Existence of the same Indoor Unit No in the same System Refrigerant Cycle Failure of Protection Detecting Device Instantaneous 38 Abnormality of Protective Circuit in Outdoor Unit Power Failure Voltage Drop Abnormal Power Supply 39 Compressor Abnormality oF Running Currentat Constant Overcurrent Blown Fuse of Failure of Current Sensor Compressor 43 Pressure Ratio Decrease Protection Activating allure of Inverter Compressor Loose Power Supply Connection Overload to Indoor in Cooling High Temperature of 44 Protect Low Pressure Increase Protection Activating Outdoor Air In Heating Expansion Valve Open Lock rotection i
233. ircuit breaker for constant speed compressor SMGB0049 rev 2 08 2010 246 Outdoor units FSN2 Servicing Service Manual RAS 44FSN2 to RAS 48FSN2 380 415V 50Hz 380V 60Hz Front side Main HITACHI Inspire the Next The interior of the electrical control box Main PCB1 NF2 B wae 3 IEJ S a p m y A Portion Middle part of holder 1 isch PCB Fixing Holder 10 Front side Auxiliary RAS 44FSN2 to RAS 48FSN2 220V 60Hz Front side Main The interior of the electrical control box Main
234. ire the Next lil DSWS8 Unit model code setting No setting is required All areas ON lil DSW9 Not prepared No setting is required Setting before shipment o rM DM crai ll DSW10 Setting for transmitting The setting for transmitting is required for the cancellation of end terminal resistance Before the shipment the No 1 pin of DSW10 is set at the ON side ON af 12 If the quantity of outdoor units in the same H LINK or H LINK II is two or more set the No 1 pin of DSW10 in the 2nd unit to OFF ON If only one outdoor unit is used no setting is required wal 12 If you apply high voltage to the terminals 1 and 2 of the TB1 the fuse ON on the PCB is blown out wi If that is the case first connect the wiring to the TB1 Then turn on 2 12 End resistance cancelation ON a 12 SMGB0049 rev 2 08 2010 37 Electrical wiring for the outdoor unit Electrical wiring HITACHI Inspire the Next Service Manual 3 3 Common wiring A CAUTION Use the shielded twisted pair cable or the shielded pair cable for the transmission cables between the indoor unit and the outdoor unit Connect the shielded part to the earth screw in the electrical box of the indoor unit as shown below Also use these cables for the operation wiring between one indoor unit and another indoor unit H LINK connection Shielded part 1 Transmission cables NC 4
235. is an indication for internal information for the remote 0 01 MPa rte tt f control switch This does not have any specific meaning J 22 Control information H d H H J 23 Operation frequency Hz H H H H This is an indication for frequency of inverter 1 Indoor unit capacity indication 24 Indoor unit capacity E H The capacity of the indoor unit is indicated as shown in the table below l Capacity code of indoor unit o r Indication code Equivalent capacity HP 25 Outdoor unit code LUC rn 06 38 iow 08 1 0 T 10 1 3 13 1 5 j call rye 14 1 8 26 Refrigerant cycle number LI Zi LU 6 16 2 0 Mir 18 23 T 20 2 5 22 2 8 71 26 3 0 3 5 27 Refrigerant cycle number I Uf h i1 i 32 4 0 40 5 0 J 48 6 0 64 8 0 Expansion opening indication 2o 10 0 Indoor unit expansion a indicates the total number of Indoor Units valve opening Im I LL I Ho h r Ho OE E Hu J 1 9 10 11 12 13 14 15 16 J3 01 16 01 when shipment DSW5 Decimal indication J4 00 OF 00 when shipment DSW5 Indication with 16 numbers 29 Outdoor unit expansion Lx I c valve MV1 opening 96 LII z zt In case of models without the expansion valve MV2 the same figure is displayed J Outdoor unit expansion o D vd 30 valve MV2 opening L al l ml l Estimated electric current indication 31 Compressor Running I
236. is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is indicated 5 minutes after power is supplied to the outdoor unit when the indoor unit No connected to the outdoor unit is duplicated by setting of DSW and RSW G NOTE In the case of H LINK System this alarm code is indicated when DSW1 and RSW1 of the outdoor unit PCB1 and DSW5 and RSW2 of the indoor unit PCB are incorrectly set In this case set them correctly after turning OFF the main switch and again turn ON the main switch When the refrigerant number setting of outdoor unit H LINK II and the one of outdoor unit H LINK are duplicated the alarm 35 may go ON and OFF repeatedly PCB1 Control PCB in Outdoor Unit SMGB0049 rev 2 08 2010 143 Troubleshooting procedure Troubleshooting HITACHI Inspire the Next Service Manual Alarm code Description 7t r1 Abnormality of picking up circuit for protection Lt Outdoor Unit W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is indicated when AC 220V or 2
237. is short circuited less than 0 24 kQ or cut greater than 840 kQ during the cooling process or the heating process The system is automatically restarted when the fault is removed PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Freeze protection Is THM5 connected to intake No thermistor THM3 of PCB Connect it Yes Is the resistance of THM5 between 0 24kQ and 840kQ Faulty thermistor Refer to the thermistor resistance in Alarm 11 In case of 4 way cassette Faulty PCB Action Phenomenon Cause Check item Turn OFF the main switch Fault Check the resistance Replace the thermistor if faulty Faulty gas piping thermistor Incorrect connection Check the wiring to PCB Connect wiring correctly Replace PCB and check the Faulty PCB operation Replace PCB if faulty SMGB0049 rev 2 08 2010 Troubleshooting procedure 133 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description H Activation of the protection device for the indoor fan motor RCI W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB1 This alarm code is indicated when the following condition occurs thre ti
238. is smaller than 50 or greater than 130 of the combined outdoor unit capacity Are 1 6 of DSW2 on the Yes PCB1 Control PCB in Outdoor Unit indoor unit PCB1 set incorrectly Set the capacity for PCB1 PCB Indoor Unit PCB No Are 1 4 of DSW3 on the Yes indoor unit PCB set incorrectly M Set the capacity for PCB y No Are the setting of DSW1 and RSW1 on the outdoor Yes unit PCB1 and the setting of Outdoor Unit PCB1 DSW1 RSW1 DSW5 and RSW2 on the indoor FRMISHUDU HEN Indoor Unit PCB DSW5 RSW2 unit PCB totally same in a refrigerant cycle li Total capacity of the indoor units is wrong Action Phenomenon Cause Check item Turn OFF Main Switch Check combination of indoor Incorrect capacity setting of Indoor Unit units and capacity setting on Correctly set dip switch DSW3 PCB Incorrect capacity setting of Outdoor Unit Check capacity setting on Correctly set dip switch DSW2 P outdoor unit PCB1 inuipad i i Total Indoor Unit capacity connected to the Outdoor Unit is beyond Chees outdoor uni model by Ensure that total indoor unit Fn calculating total indoor units p S the permissible range capacity is from 50 to 130 capacity Refrigerant cycle setting of the outdoor unit and the indoor unit is EBEN
239. is used following dimensions should be secured Se d d1 Gap a ee Qd1 Gap a 0 08 0 1 0 33 0 09 0 1 0 39 96 35 96 5 6 922 22 922 42 10 0 08 0 0 07 0 09 0 0 11 0 08 0 1 0 35 0 12 0 1 0 42 9 53 9 7 8 9254 925 6 12 0 09 0 99 0 12 0 0 08 nd 0 08 0 1 0 38 0 12 0 1 0 42 esses 5 912 7 912 9 8 28 58 28 78 12 4 0 08 0 0 19 0 12 0 0 08 0 09 0 1 0 41 0 12 0 1 0 47 15 88 16 1 8 931 75 932 0 12 0 09 0 0 13 0 12 0 0 13 0 09 0 1 0 44 0 12 0 1 0 52 19 05 919 3 10 938 1 938 3 14 0 09 0 0 16 0 12 0 0 18 A basic brazing method is shown below o Pre heat the outer tube for better flowing of the filler metal o Ll e Heat inner side tube evenly e HN 0 Rubber plug me a ELM EL es Packless valve o 0o Q High pressure hose prs 9 6 0 03 to 0 05 MPa 0 3 to 0 5 Kg cm G o Q Reducer valve open this valve only when the gas is needed o Nitrogen gas flow 0 05m3 h or smaller A CAUTION Use nitrogen gas for blowing during pipe brazing If oxygen acetylene or fluorocarbon gas is used it will cause an explosion or poisonous gas During the brazing work a lot of oxidation film will be generated inside of the pipes if no oxygen free nitrogen gas is blown through the pipes This film will be flecked off after operation and will circulate in the refrigeration cycle resulting in clogged exp
240. isplayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 The alarm code is indicated when inverter electronic thermal protection is activated at six times within 30 minutes Retry operation is performed up to five times Conditions of Activation Inverter current with 10596 of the rated current runs for 30 seconds continuously or Inverter current runs intermittently and the accumulated time reaches up to 3 minutes in 10 minutes Is the cause of stoppage FE of troubleshooting by 7 segments display 2 or 4 D PCB1 Control PCB in Outdoor Unit PCB2 Inverter PCB uA Restart operation Is the compressor current larger than activation current 1 Yes Refer to next page m Is discharge pressure high Check pressure and refrigeration No Smaller than activation current Check the diode module 2 Abnormal cycle Check for clogging of the heat exchanger 9 Check the fan motor Normal Check the inverter circuit board PCB2 connection 3 Abnormal gt Replace the diode module Normal gt Connect it correctly Transistor module IPM is faulty Replace it 1 Re
241. it at activation Alarm Code Hist Refer to Alarm Code 02 and Activation of picking up circuit for of pickig up circuit for protection 02 and 09 before 38 09 tecti eine Check the voltage that is 22 Incorrect connection Repair the wiring connections supplied to the connectors Faulty PCB1 Replace PCB1 SMGBO0049 rev 2 08 2010 144 Troubleshooting procedure Troubleshooting HITACHI Service Manual Inspire the Next Alarm code Description 4 H Abnormality of running current at constant compressor W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the following conditions occurs The running current of the constant speed compressor exceeds the value of the overcurrent limitation during the operation The running current of the constant speed compressor detected is OA this value is the same 3 minutes after stopping all the compressors and this phenomenon occurs three times within 30 minutes Does the CMC2 5 turn ON No a Check the wiring connection around PCB1 Yes N Check the fuses and the Does the constant speed M wiring between CMC2 5 compressor operate and the constant speed compressor Yes
242. ithin the next 30 minutes PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB Yes Is there a leakage of SVA Replace SVA if faulty No Is the outdoor unit stop valve Yes closed Open the stop valve i No No Check the connection of the TN 2 Bun Is the high pressure sensor OK circuit board connector Replace the high pressure sensor if faulty i Yes Are the ex valves fully closed Yes Check the circuit board and and locked connection of the circuit board Check the outdoor electronic expansion valve connector Replace the electronic t during the cooling process and the indoor expansion valves if faulty i No electronic expansion valve during the heating process Are the electric wiring and Yes the refrigerant piping between Connect them correctly the indoor unit and outdoor unit incorrectly connected Note In the case of H LINK connection check the refrigerant cycle setting on the PCB1 of the outdoor unit and the indoor unit PCB No Check whether the inlet air gt temperature of the indoor unit and the outdoor unit is too high Phenomenon Cause Check item Action Turn OFF Main Switch Check the connection Replace Excessively high discharge pressure Leakage of SVA outdoor unit Check the outlet temp of SVA SVA if faulty Closed stop valve Check the stop valve Open the stop valve
243. k wiring to PCB1 Repair wiring and connections Faulty PCB1 Replace PCBT andicheck Replace PCB1 if faulty operation 188 SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting HITACHI Service Manual Inspire the Next Alarm code Description m Abnormal operation of thermistor for discharge gas temperature on the top LL l of compressor chamber W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the thermistor is short circuited less than 0 9 KQ for one second or cut greater than 5946 kO during the operation If you find an abnormal operation of the thermistor check all the thermistors as shown below Is the setting of DSW2 on Mo PCB1 right i Yes Are discharge gas thermistors THM8 THMS9 THM12 No THM13 THM18 connected to THM8 TD1 THM9 TD2 THM12 TD3 THM13 TD4 and THM18 TD5 on PCB1 1 Yes Is resistance of discharge gas thermistors THM8 THM9 Set DSW2 on PCB1 correctly position of the thermistors gs Connect the thermistors see alarm 7 THM12 THM13 and THM18 No
244. l cable or remote control switch Install the indoor units and components as far as practical or at least 3 meters from the electromagnetic wave radiator Prepare a steel box and install the remote control switch in it Prepare a steel conduit tube and wire the remote control cable in it Then connect the ground wire with the box and tube Install a noise filter when the power supply emits harmful noises This unit is exclusive non electrical heater type indoor unit It is prohibited to install a electrical heater in the field Mount suspension bolts using M10 W3 8 as size as shown below Wooden Bar 60mm to 90mm square Insert 100 to 150 kg Concrete Steel beam Steel Anchor bolt W3 8 or M10 Anchor bolt W3 8 or M10 Wooden Beam Concrete Beam Steel Beam Wooden Beam Do not put any foreign material into the indoor unit and check to ensure that none exist in the indoor unit before the installation and test running Otherwise a fire or failure may occur 7 NOTE Hitachi indoor units are designed for free air discharge Static Pressure Pst 0 except ducted indoor units as RPIM which require to be connected to discharge air ducts For these units see flow static pressure chart SMGB0049 rev 2 08 2010 3 General installation notes HITACHI Units installation Inspire the Next Service Manual 1 2 Transportation and handling Transport the product as close to installati
245. l code of stoppage cause is canceled when a stopping order is issued or main power source is cut off 5 Fin Temperature Increase a Level of Detection When the temperature of internal thermistor exceeds more than 100 C an abnormality is detected SMGB0049 rev 2 08 2010 255 Inverter HITACHI Bk Inspire the Next Service Manual Dpue MEDA SSSSSS _ b Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1 c Cancellation of Protection Function Transmission for signal code of stoppage cause is canceled when a stopping order is issued or main power source is cut off 6 Earth Detection a Level of Detection When the starting current of the compressor reaches 80 of the overcurrent protection value an abnormality is detected b Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1 c Cancellation of Protection Function Transmission for signal code of stoppage cause is canceled when a stopping order is issued or main power source is cut off a Level of Detection When the output current exceeds 105 of the maximum output current an abnormality is detected b Function An overload signal is issued when output current exceeds 105 of the maximum output current and the frequency decreases For 10 seconds after the output current decrease
246. le for the power supply wiring The recommended breaker sizes are shown in the table of electrical data and recommended wiring If a conduit tube for the field wiring is not used fix the rubber bushes on the panel with adhesive Allthe field wiring and the equipment must comply with the local codes and the international codes Make sure that the power source voltage is correct An incorrect wiring may cause a breakdown of the transformer PSC 5HR or the units Especially DO NOT connect the power source to the terminal board for transmission DO NOT install the H LINK II wires along the power supply wire other signal wires and others If you install the H LINK II wires along those wires there may be a malfunction due to the electrical noise If you need to install the H LINK II wires near those wires provide a distance of 15 cm or more Or alternatively insert the wires into the steel pipe and ground one end of the pipe SMGB0049 rev 2 08 2010 Common wiring Electrical wiriing HITACHI Service Manual Inspire the Next Electrical wiring connection Models RAS 8 48FSN2 Max 4 Units Power Supply Line 8 to 12HP 1 Outdoor Unit Power Supply Line 14 to 48HP No 0 system No 1 system No2system 7 outdoor unit outdoor unit outdoor unit bod TB1 TB2 N L1 Le Ls N 1T2 41 INN A IN 12577 S l MW np i C SRI IE HIPH B Operating line shielded twisted pair cable
247. ll be damaged Checking procedure PSW switches a To start checking press PSW2 switch for more than three seconds M ec in v A To proceed checking forward press the PSW2 switch for less than two Ol O O seconds RSW JESW2 T Pena To go back to the previous item backward press the PSW3 switch for less than two seconds 7 segments display To cancel this checking press the PSW2 switch for more than 3 seconds The dfisplay will change to the indication one step before Then press the PSW2 SERE SEGI switch once again for more than three seconds B B H s B A CAUTION Make sure that the checking mode is cancelled after the checking Otherwise you may cause a malfunction No Item Indication Data Values Units 01 Output state of micro computer i see figure below see table below Y20CHG YCH1 Y52C1 PCB Relay Part name o Q se e E 8 Relay for solenoid valve S E A E 9 Y20A1 A5 SVA1 5 a MYG goo purc gt noy C D Y20B e J AN E J MN DNE S UM x rN VAN Pao Pao y20cHe DC FAN2 DC FAN1 Y20A1 Y52C4 Y20F1 Y52C1 5 Relay for compressor Y211 Y212 Relay for 4 way valve YCH1 Relay for crankcase heater Relay for 1st and 3rd fan at Bert inverter speed Relay for 2nd and 4th fan at YMFCS 4 constant speed SMGB0049 rev 2 08 2010 165 T
248. louver Auto louver is horizontally stopped B Analog test If the thermistors for the inlet air temperature for the discharge air temperature and for the freeze protection are normal proceed to the next step C Each relay test ME c Check the ON OFF sound 52H1 2 3 Fan of the relays and the LED Low Wireless Perform repeatedly receiver part Red Wireless receiver part Green Wireless LU 0o receiver part Y Yellow S S Termination Turn OFF and reset all the DIP switches as before 180 SMGB0049 rev 2 08 2010 Procedure for checking each main part Troubleshooting HI ITACHI Service Manual Inspire the Next E High voltage discharge work for replacing parts A WARNING Perform this high voltage discharge work to avoid an electric shock Procedure a Turn OFF the main switches and wait for three minutes Check to ensure that no high voltage exists If LED201 is ON after start up and LED201 is OFF after turning OFF power source the voltage will decrease lower than DC50V b Connect connecting wires to an electrical soldering iron c Connect the wires to terminals P and N on IPM gt Discharging is started resulting in hot soldering iron Pay attention not to short circuit between terminal P and N d Wait for 2 or 3 minutes and measure the voltage once again Check to ensure that no voltage is charged Electrical soldering iron Connecting Wires Transi
249. m Check the activation of the drain up mechanism 3 Float switch Activation Check the activation of the float switch E For the outdoor unit only 1 Compressor Sound and vibration Check for abnormal sounds and vibrations Activation Check that the voltage drop of the power supply line is within 1696 at the start and within 296 during the operation 2 Reverse valve Activation Check for any abnormal activation sound 3 Strainer Clog Check that there is no temperature difference between both ends 4 Ground wire Ground line Check for the continuity to earth 5 Oil heater 1 1 Activation You should activate the oil heater at least twelve hours before the start up by turning ON the main switch SMGB0049 rev 2 08 2010 Maintenance work 269 HITACHI Inspire the Next Field work instruction Service Manual No Procedure Remarks 1 Turn off the main switch of the outdoor unit 2 Remove the covers the thermistor the crankcase heater the power wirings and other items according to the chapter Removing the Parts of the Oudoor Unit Make sure that the terminal part of the detached power supply wires is not exposed by the winding insulation tape and other items 3 Attach the manifold to the check joint of the high pressure side and the low pressure side of the outdoor unit 4 Turn on the main switch of the outdoor unit 5 Set the exclusion of the compress
250. making contacts on the piping 4 Was a ground wire connected 5 Is there any short circuit 6 Is there any voltage malfunction among the different phases L1 L2 L2 L3 L3 L1 L1 N 2 Refrigerant cycle a Cooling heating process No Check item Result 1 Operate all the indoor units TEST RUN mode Operate all the indoor units at the HIGH speed If you turn ON and OFF the constant speed compressor repeatedly stop one indoor unit an indoor unit with a small capacity b Sampling data cooling heating process if the indoor temperature is between 21 C and 30 C No Check item Result 1 After operating for more than 20 minutes 2 Check Pd and Td Is TdSH 15 to 45 degrees 3 Is Ps 0 2 to 1 1 4 Is Pd 1 0 to 3 5 If the outdoor temperature is high the Pd becomes high SMGB0049 rev 2 08 2010 86 Check list Test run Service Manual 3 Check item after sampling data a Cooling process if the outdoor temperature is higher than 15 C HITACHI Inspire the Next Check list No Check item Standard Causes Result 1 Is H1 compressor frequency CC Running horsepower of the Low excessive refrigerant number of running compressors indoor units X 8Hz High insufficient refrigerant 1 X 3 abnormally low or high DSW for capacity of indoor It is applicable when the inlet air units Incorrect setting temperature is three degrees high
251. malfunction or damage will occur 3 Check to ensure that the electrical wires will not be caught between the mounting electrical components and the mounting plates when the PCB2 is remounted 4 Apply silicon grease evenly on the whole rear side of the fan module when mounting Silicon grease is available as a field supplied accessory Service parts No P22760 SMGB0049 rev 2 08 2010 184 Procedure for checking each main part Troubleshooting Service Manual E Checking procedure for the electronic expansion valve HITACHI Inspire the Next Indoor unit electronic expansion valve Outdoor unit electronic expansion valve Locked with fully closed Check the liquid pipe temperature during the heating process It is abnormal if the temperature does not increase It is abnormal if the liquid pipe pressure does not increase during the cooling process Locked with slightly open Locked with fully open It is abnormal under the following conditions The temperature of the freeze protection thermistor becomes lower than the suction air temperature when the unit which is under checking is stopped and the other units are under the cooling process Electronic expansion valve Freeze protection thermistor Unit under Other units checking 4 e It is abnormal if the liquid pipe pressure does not increase and the outlet temperature of the expansion valve decreases after the cooling process sta
252. ment display SEG1 SEG2 Ll d l Na Lo Input Output Terminal Indication N Control Function No This display indicates that the control function No 1 Fixed Heating Operation Mode is set at input 1 2 By pressing the push switches PSW2 and PSWS input output terminal indication is changed Input terminal Current setting function is indicated as Control Function No The figure is for setting before shippment indication 1 Input terminal indication 2 Input terminal indication 3 Output terminal indication 1 Output terminal indication 2 The following shows the display changes when PSW2 and PSW3 are pushed 3 After the input output terminal indication is selected select your required control function No by pushing PSW2 or PSWS while PSW1 is being pushed This number is increased by 1 by pushing PSW2 while PSW1 is being pushed 7 This number is decreased by 1 by pushing PSW3 while PSW1 is being pushed 4 After selecting the function No return No 7 pin at the OFF side on the DSW5 The selected contents are memorized in the outdoor unit printed circuit board and the function selection mode is stopped The memorized data is maintained even power source lines are disconnected The connecting details of each function are described and the required parts are also indicated in the table Seting of external input and output functions SMGB0049 r
253. mes in 30 minutes Indoor fan rotates less than 70 rpm for 5 seconds during operation When the cause is checked by means of this flow chart confirm that fan speed setting is Hi Indication of alarm amp Check the connectors Indoor unit PCB Set air flow volume Hi before starting this check Ahigh voltage is applied to electrical parts Never contact with them when checking to avoild code 19 PCN7 PCN11A PCN11B PCN15 Yes Is 220V applied between R and S of TB1 electric shock No PCB1 Control PCB in Outdoor Unit Check power supply PCB Indoor unit PCB Is fan motor Is LED4 on Insuffcient voltage for PCB OFF Faulty PCB microcomputer Replace PCB Is LEDS on Yes Insuffcient voltage for fan PCB OFF Faulty PCB motor DC280 gt Replace PCB No 1 Is DC power Is the voltage between Vcc15V and VDC of supply for PCB Faulty PCB PEB 15V 10 Use a tester gt Replace PCB correctly 1 E ote efer to the figure above for the check point 2 Is DC power Is the voltage between VccO05V and GND1 of PCB 5V 4 andi Faulty PCB Is the voltage between Vcc12V and gt Replace PCB ye GND1 of PCB 13 3V 10 speed control command to fan motor correctly 3 Does fan motor No rotate
254. mistors as shown below This alarm is indicated when the thermistor is shortcircuited less than 0 2 kQ or cut greater than 500 kO during running These thermistors are attached as shown in the figure Are thermistors THM10 THM11 THM15 THM16 THM17 or THM23 on PCB1 connected to THM10 Te1 THM11 Te2 THM15 No Connect it Te3 THM16 Te4 THM17 Tchg or THM23 Tsc Y Yes Is the resistance of the thermistor between 0 2 kO and 500 kQ Faulty thermistor Yes Faulty PCB1 Indication on the display of the outdoor unit PCB1 Refer to Alarm code 11 for thermistor resistance Heat exchanger Heat exchanger liquid pipe THM10 11 15 16 Te thermistor for evaporating temperature THM17 Tchg thermistor for super cooling bypass line temperature THM23 Tsc thermistor for super cooling bypass line temperature Thermistor Tsc TCHg Thermistor Faulty Tet H oct Faulty Te4 E H Faulty Te2 EHl Faulty Tchg i H Faulty Te3 Lg H Faulty Tsc Phenomenon Cause Check item Acton Faulty thermistor for the evaporating temperature during Fault Check the resistance Turn OFF the main switch Replace the thermistor if faulty Repair the wiring
255. move the screws fixing electrical components NOTES The open angle for the PCBs fixing plate should be within 120 degree If try to open wider than 120 degree the fixing plate will not open due to insufficient electrical wiring length Do not touch the electrical components on PCBs Do not bend or apply excessive force to PCB It will cause PCB failure Removing electrical components for auxiliary electrical control box RAS 14FSN2 to RAS 48FSN2 Only 1 2 Remove all the wirings connected with electrical components Remove the screws fixing electrical components NOTES 2 Protect the cables from being caught on the plate 3 The capacitor is charged with electricity even if the 1 Match the terminal Nos with the mark band Nos when reassembling If incorrectly connected malfunction may occur or the electrical components may be damaged edge or electrical component when closing the PCB fixing plate for reassembling power source is turned off DO NOT contact with the terminals to avoid electrical shock SMGBO0049 rev 2 08 2010 Outdoor units FSN2 243 HITACHI 2 Inspire the Next Service Manual RAS 8FSN2 to RAS 12FSN2 380 415V 50Hz
256. move the short circuited air Check for other heat source Remove the heat source Faulty pressure Measure the discharge pressure Check the Replace the pressure switch Faulty high pressure switch switch continuity after the if faulty decrease of the pressure Insufficient Measure the resistance by Fix the looseness Replace contacting means of the tester the connector Incorrect connection Check the connections Repair the connections 116 SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Action Phenomenon Cause Check item Turn OFF the main switch Check for clogging Remove the clogging Activation of the high pressure Switch due to the excessively high discharge pressure Faulty or malfunction of the expansion valve Check the connect wiring and the connectors Replace the connector Check the operation sound from the coil Replace the coil Check the discharge gas thermistor Replace the thermistor Check the attaching state of the discharge gas thermistor Reattach the thermistor Faulty gas bypass solenoid valve Check for clogging Replace the gas bypass solenoid valve Overcharged refrigerant Mixture of the non condensate gas in the refrigerant cycle Check the cycle operation temp Check the air temp and the pressure Charge the refrigerant correctly
257. mpressor and the Make sure that you follow the instructions change of the refrigerant oil according to the section Replacing the Compressor 15 Perform the vacuum from the check joint of the low If you collect the refrigerant only on the low pressure side pressure side A in 11 You cannot perform the vacuum of the refrigerant from the check joint of the high pressure side 16 Open the liquid stop valve and the gas stop valve completely when you finish the vacuum 17 Make sure that the power is turned OFF and attach the following items the power supply wire the thermistor the crankcase heater the 63H wiring the panel and the nut 18 Setthe DSW back to the original setting Make sure that all the wirings to the compressor are connected correctly 19 Recharge the refrigerant that is collected in the If the replacement of the compressor takes more than two process by the stop valve of the liquid side during the hours an additional change of the refrigerant is necessary cooling at the TEST RUN mode Additional Change Replacing Time 2 hours x 0 5kg SMGB0049 rev 2 08 2010 271 Maintenance work 11 Hitachi Air Conditioning Products Europe S A Ronda Shimizu 1 Pol g Ind Can Torrella 08233 Vacarisses Barcelona Espana ISO 9001 Certified by AENOR Spain ISO 14001 Certified by AENOR Spain Hitachi Appliances Inc Shimizu shi Shizuoka ken Japan ISO 9001 Certified by JQA Japan ISO 14001 C
258. n three degrees NOTES 1 The symbol with an underline indicates a check item The mark indicates the checking data 2 Regarding the mark amp converted frequency of constant speed compressor you should apply the following values For FSN2 Mark s Outdoor Unit Model MC2 MC3 MC4 MC5 RAS 14 and 16FSN2 50 RAS 18 and 20FSN2 50 50 RAS 22 and 24FSN2 50 77 RAS 26 and 28FSN2 77 77 RAS 30 to 36FSN2 77 77 50 RAS 38 to 42FSN2 77 77 50 77 RAS 44 to 48FSN2 77 77 77 77 SMGB0049 rev 2 08 2010 88 Check list Test run HITACHI Service Manual Inspire the Next 6 4 Judgement systems for refrigerant amount omatic judgement syste For refrige This function is available under the following conditions Total piping length is 300 m or more The indoor and outdoor air temperature is within the applicable range as shown in the figure Before performing this function charge the additional refrigerant according to the total piping length However this function can not be utilized for judgement of excessive refrigerant and combined the indoor unit of 8HP or more Indoor air temp C Outdoor air temp C Procedure of judgement for refrigerant charge amount 1 Check to ensure that all of indoor units is turned OFF 2 Turn ON No 6 pin of DSW5 on the outdoor PCB PWB1 When starting judgement all of indoor units
259. n of Protection Device Activation of PSH pipe clogging excessive refrigerant inert gas mixing Abnormality between Indoor or Outdoor and Outdoor Incorrect Wiring Loose Terminals Disconnect Wire 11 Inlet Air Thermistor 03 or Indoor Tripping of Fuse Transmission Transmission Failure Loose Connector If only fan 04 Abnormality between Inverter PCB and Outdoor PCB controller is failed indications are as follows Abnormality between Fan Controller and Outdoor PCB Number 1 Fan Controller Failure F1 04 Number 2 Fan Controller Failure F2 04 T Incorrect Power Source Reverse Phase Incorrect 05 Supply phase Abnormality of Power Source Wiring Wiring Open Phase Outdoor Voltage Drop Insufficient Power Capacity If voltage drop cause by fan controller is detected 06 Voltage Abnormal Inverter Voltage indications are as follows No 1 Fan Controller Failure F1 06 No 2 Fan Controller Failure F2 06 07 Decrease in Discharge Gas Superheat Excessive Refrigerant Charge Failure of Thermistor Cycle Incorrect Wiring 08 Increase in Discharge Cas Temperature Insufficient Refrigerant Charge Pipe Clogging Failure of Thermistor Incorrect Wiring 09 Fan motor Activation of Protection Device for Outdoor Fan Fan Motor Overheat Locking 12 Sensor on Outlet Air Thermistor Indoor Unit i i 13 Freeze Erolection Thermistor Incorrect Wiring Disconnecting Wiring 14 Gas P
260. n seven segments 2 08 is displayed in seven segments 3 When Ps 0 1MPa is continued for one minute in ten minutes STP is displayed in seven seconds and the operation finishes The operation may finished when any of the conditions 1 to 3 occurs 9 Close the liquid stop valve completely To avoid the spillage of all the refrigerant if the check valve is broken SMGBO0049 rev 2 08 2010 270 Maintenance work Field work instruction Service Manual HITACHI Inspire the Next No Procedure Remarks 10 Check for a leakage of the check valve on the When you stop the compressor for replacing discharge gas side You can check the leakage of the check valve by means DSW4 4 Enforced stoppage of the compressor of the Ps variation because the SVA opens so that gt ON so that the Compressor will not run the discharge gas side of the inverter compressor can although the running command is sent from the connect to the low pressure side remote control switch ae 0 03 Mpa 2 minutes is within the permissible limits for Check that variation of Ps on the outdoor unit PCB the check valve on the discharge gas side is 17 seconds Make sure that the Ps increase is within 0 03 Mpa in two minutes after the Ps The leakage of the check valve may cause an incorrect increase at the stoppage during approximately brazing due to the gas pressure at the br
261. n the setting condition 1 at the fixing of demand function a is selected and the demand current control from the external input signal is set Electricity consumption 10096 Electricity consumption 60 to 10096 20min 10min 20min 10min 20min 10min 20min Wave function can be activated when demand function is selected at one of the input terminal indications and 3 The minimum limit of running current control is according to the set value of the demand function If demand function is not set at the input terminal indication this function can not be activated E Cold draft protection 1 Press PSW1 and select the setting condition 1 at the cold draft protection 1 Fh so the cold draft protection can be set When the minimum Indoor unit discharge air temperature falls down to 12 C and below at cooling operation outdoor fan stops and compressor frequency forcibly decreases to prevent a drop in discharge air temperature Bl Cold draft protection 2 Press PSW1 and select the setting condition 1 at the cold draft protection 2 Fc so this function can be set When Indoor unit minimum discharge air temperature falls down to 10 C and below at cooling operation the compressor stops In this case stoppage code number 28 is given SMGB0049 rev 2 08 2010 81 Outdoor units HITACHI Inspire the Next 6 Test run Test run Service Manual 82 83 85
262. nd the pieces of paper which might restrict the airflow 3 Piping connection Leakage Check for the refrigerant leakage at the piping connection 4 Cabinet Stain and Lubrication Check for any stain and any lubrication Remove the stain and the lubrication Fixing Screw Check for any loosened screw or any lost screw Fix the loosened screws and the lost screws Insulation Material Check for any peeled thermal insulator on the cabinet Repair the thermal insulator 5 Electrical equipment Activation Check for an abnormal activation of the magnetic contactor the auxiliary relay the PCB and others Line condition Pay attention to the working voltage the working amperage and the working phase balance Check for any faulty contact that is caused by the loosened terminal connections the oxidized contacts the foreign matter and other items Check the electrical insulation resistance 6 Control device and protection device Setting Do not readjust the setting in the field unless the setting is maintained at a point that is different from the point that is listed in the section Protection and Safety Control of this Service Manual E For the indoor unit only 1 Air filter Cleaning Check for any accumulated dirt and any accumulated dust Remove the dirt and the dust 2 Drain pan drain up mechanism and drain pipe Drain line Check and clean the condensate drain pipe at least twice a year Drain up mechanis
263. nding wall No limit to wall height MOC gt 50 2 gt 5004 h2 gt 1 h1 Rear side wall height 500 mm 2 h2 Front side wall height 500 mm LN BL E ee 300 m 1 Le e gt 500 R2 2 40 SMGB0049 rev 2 08 2010 Outdoor units installation Units installation Service Manual Keep the upper side open to prevent air short circuiting n case that the front and either of the sides are open Installation in the same direction HITACHI Inspire the Next No limit to wall height s d Y TTT ET TTT TTT HB TT TTL JILIN TITLE 2 500 i gt 1000 250 250 a Y A Max 3 units in a row Top view 21000 Provide a distance of min 1000 mm to the next unit Rear to rear installation No limit to wall height gt 900 O O Q O 2 1000 IV oO eo o lt 1 250 250 z c m 250 7 1 Pd Sm y 250 K eA i S a00 Max 3 units in a row HO HMM Top view gt 10
264. ng to the KHK standard 267 11 7 Maintenance work 269 11 7 1 Pump down method for replacing the compressor 270 SMGB0049 rev 2 08 2010 263 11 Field work instruction HITACHI Inspire the Next Service Manual 11 1 Checking the power source and the wiring connection Check the following items in the case of abnormal operation No Check item Procedure 1 Isthe breaker of the Check the secondary voltage of the breaker and the fuse by means of a tester fuse cut out 2 Is the secondary Disconnect the secondary side of the transformer and check the voltage by means of a tester power source on the transformer correct Indoor unit transformer 12V Primary side Secondary 220 V or 240 V side 12V o o G o gt o c 3 o o 3 Is the wiring Check the wiring connection on the PCB loosened or Thermistor connectors incorrectly Connector of the remote control cable connected Connector of the transformer Each connector in a high voltage circuit Check the connectors according to the Electrical Wiring diagram 11 2 Burnt out compressor due to an insufficient refrigerant charge E Question and answer for the field work Example 1 Burnt out compressor due to an insufficient refrigerant charge Phenomenon After commissioning the alarm code 08 sometimes occurred and the compressors were burnt out after oper
265. nt air temp thermistor VENTI HECK After 1 second Y To next page 176 SMGB0049 rev 2 08 2010 Procedure for checking each main part Troubleshooting HITACHI Service Manual Inspire the Next If you are using a wireless remote control switch with the built in receiver part of the wall type indoor unit and you need to perform the above checking perform the following procedure 1 Turn OFF the power supply 2 Disconnect the connector CN25 on PWB M 3 Connect the PC P1HE 4 Turn ON the power supply After finishing the checking turn OFF the power supply again and reconnect the connectors according to the previous situation before the checking From previous page k If there is a second unit Press C Press TEMP gt Q Self checking indication of the ve 6 next unit HIGH m COOL Deng r1 ADDS RN al Ll AIC CHECK ex Indication of unit No 2 After 7 seconds y HIGH HIGH COOL nai 3 After 1 to 5 seconds COOL l Result LL ra jt AIC AIC After 1 second Repeat gt LZ LI gt pt ml Lt 46 LL RESET Release PCB check Press mode G NOTE t 1 If this indication continues and the alarm code i i is not displayed this means that each one of indoor unit is not connected to the remote control switch Check the wiring between the remo
266. nt oil in the compressor from the discharge pipe and measure the oil quantity This procedure should be performed for constant speed compressor or the inverter compressor replacement G NOTES 1 Additional refrigerant oil charge is required if remaining refrigerant oil quantity in the old compressor gt pre charged refrigerant oil in the new compressor 2 No additional refrigerant oil charge is required if remaining refrigerant oil quantity in the old compressor lt pre charged refrigerant oil in the new compressor 3 The recharged quantity of the refrigerant oil to the cycle is calculated as follows Measured quantity Collected quantity at the procedure 8 200 cc Initial charged quantity in the compressor for each model Initial Charged Refrigerant Oil For Inverter E656DHD 1100cc For Constant Speed E656DH 1100cc For Constant Speed E1000GH 1800cc 200 cc This value is considered not to be removed from the chamber 4 If the refrigerant oil quantity can not be measured additionally charge 300 cc 5 If the refrigerant oil is contaminated exchange all of them with new refrigerant oil Discharge piping Refrigerant oil Measure cup SMGBO0049 rev 2 08 2010 Outdoor units FSN2 213 HITACHI le Inspire the Next Service Manual 12 Mount the new compressor When attaching the nut at the front side pay attention not to deform the discharge piping Perform the brazing according to the f
267. nt speed compressor failure 23 Failure of discharge gas thermistor 39 Abnormality of running current at constant speed compressor Outdoor fan motor failure 56 to 58 Abnormal outdoor fan operation a Procedure By pressing TEMP amp for 3 seconds simultaneously emergency mode operation starts EMG can be displayed on the LCD during this operation b Operation Condition nverter compressor failure Emergency operation is performed by other compressors except inverter compressor when the inverter compressor is failed The compressor is forced to stop for compressor protection under the following condition Total capacity of thermo ON I U lt 50 of O U Capacity and Total capacity of thermo ON I U lt 10HP Constant speed compressor failure Emergency operation is performed by other compressors except failure compressors DC fan motor failure Emergency operation is performed by other DC fan motor except failure DC fan motor 94 SMGB0049 rev 2 08 2010 Initial troubleshooting Compressor failure PC ART HITACHI Press TEMP for 3 seconds simultaneously FAN cooL HEAT HIGH po leet low e EMG is indicated on the LCD at At vA En the remote control switch and the emergency operation starts Emergency operation ind
268. of refriogerant cycle setting Indoor unit b5 number Incorrect indoor unit number setting More than 17 non corresponding to H LINKII units are setting connected to one system SMGB0049 rev 2 08 2010 111 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual E Alarm Code History Function of Outdoor Unit PCB1 Alarm code history can be displayed while check mode is indicated on the 7 segment display of the PCB1 in the outdoor unit 1 Indication of Alarm Code History History can be registered up to 15 cases at the max In alarm occurrence order Same abnormality causes can be counted as one case Items for one case to be registered are as follows Refer to the figure below and the table 3 for more details ITC Inverter Stoppage Code Inverter compressor accumulated time when the alarm is indicated UJ1 value Cause of stoppage Alarm Code or Stoppage Code FTC Fan Controller Stoppage Code Psw2 7 Psws sec2 y y 7 sect Lc psw2 T Psws Alarm Code History T Function Li PSW2 Psw3 i 1st History EM Latest PC LL CJ i PSW2 4 psw3 Auto change for each 1 sec Alarm f a W708 or yuo
269. ogging Remove the obstacles heat exchanger Is the service area for the outdoor unit sufficient Secure a sufficient service area Check the speed of the outdoor unit fan Replace the fan motor Excessively low air temp through the outdoor unit heat exchanger Check for any short circuited air to the outdoor unit Remove the cause of the short circuited air Defrosting is insufficiently completed Check the thermistor for Replace the thermistor for the defrost operation the defrost operation SMGB0049 rev 2 08 2010 107 Initial troubleshooting HITACHI Inspire the Next Abnormal operation of the devices Cont Troubleshooting Service Manual Phenomenon Cause Check item Action Turn OFF the main switch Insufficient heating th Insufficient air flow to e indoor unit heat exchanger Check the filter for a clogging Check for any obstacles at the inlet or the outlet of the indoor unit Remove the clogging Remove the obstacles Check the indoor fan speed Replace the fan motor Excessively high tem discharge pressure Excessively high air p to the indoor unit heat exchanger Check whether or not the short circuited air exists Remove the cause of the short circuited air Excessively charged refrigerant Check the refrigerant quantity 1 Correctly charge the refrigerant Non condensate gas in
270. ol Running current limit control Li al i P pas Sa Dicharge gas SUPERHEAT decrease protection ui a r1 r Li sl l g Lr Z n Low pressure increase protection The retry indication continues for 30 minutes unless a protection control is displayed The retry indication disappears if the stop signal comes In the case that degeneration control is activated is from all the rooms NOTE The protection control code that is displayed on the 7 segment display changes to an alarm code when the abnormal operation occurs Also the same alarm code is displayed on the remote control switch indicated instead of Li mark SMGB0049 rev 2 08 2010 173 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual To monitor the conditions such as the temperature change and others the control of the frequency and other controls are performed by the protection control in order to prevent the abnormal operations The activating conditions of the protection control are shown in the table below Code Protection control Activating condition Remarks ui TI r4 Pressure ratio control Compression ratio 2 9 Frequency decrease Pd 0 1 Ps 0 06 x 2 2 Frequency increase Li q V K nu High pressure increase protection Pd 2 3 6 Mpa 36kgf cm G Frequency decrease Ps Suction pressure
271. ol system Service Manual Control subject Inverter frequency of the compressor Cooling process Heating process Defrost operation Purpose Total operation capacity of the indoor unit 2 Refrigerant collection according to piping length 3 Discharge Pre Pd Contents 1 8Hz I U HP 2 10 Hz I U HP setting DSW6 for piping length setting 3 Pd 2 1 0MPa Purpose 1 Total operation capacity of the indoor unit 2 Refrigerant collection according to piping length 3 Pd Contents 1 8Hz I U HP 2 10 Hz I U HP setting DSW6 for piping length setting 3 Pd 2 1 0MPa Contents All compressors are operated Change of operating compressor number Capacity control 2 Changeover of total indoor unit capacity 1 The operating comp numbers are decided by the threshold of the required frequency When the number of the Comp judgement conditions are satisfied Capacity control 2 Changeover of total indoor unit capacity 1 The operating comp numbers are decided by the threshold of the required frequency When the number of the Comp judgement conditions are satisfied Opening degree of expansion valve for the outdoor heat 1 Capacity control 2 Changeover of total indoor unit Fully open unused heat exchanger fully close Discharge gas super heat TdSH control TdO Tc 30 lt 90 Fully open pls
272. ollowing order a Oil Discharge Pipe b Discharge Pipe c Suction Pipe NOTES 1 When mounting the new compressor on the base pay attention not to contact with piping If contacted piping may be deformed 2 The new compressor should be mounted with the cap and remove the cap just before starting the brazing work 3 Connect the charging hose with the check joint at the low pressure side to release pressure 4 When brazing the suction pipe make sure that the connecting part is firmly inserted into the compressor The piping root is cooled in order to avoid entering the brazing material into the compressor Brazing Suction pipe Brazing Wet cloth for cooling Discharge pipe Oil discharge pipe SMGB0049 rev 2 08 2010 214 LL LLLLLL Outdoor units FSN2 HITACHI Inspire the Next Servicing Service Manual 13 Charge the refrigerant oil calculated in the procedure 11 from the union T at the return oil circuit Connect the charging hose with the union while vacuuming from the check joint at the low pressure side then start suctioning If additional refrigerant charge is not required in the procedure 11 this work is unnecessary to perform E NOTES 1 Use a clean charging hose 2 Perform this work in a short time within approximately 20 minutes and use the container with a small opening so that the
273. on location as practical before unpacking A CAUTION Do not put any material on the product When hanging the unit ensure a balance of the unit check safety and lift up smoothly For transportation Do not remove any packing materials Hang the unit without removing the packaging with ropes through each square hole and apply the splints or corrugated paper for unit protection A DANGER Do not tie ropes at the wooden base E III Wooden base SMGB0049 rev 2 08 2010 Transportation and handling Units installation HITACHI Service Manual Inspire the Next For installation RAS 8 12 FSN2 Remove the wooden base Apply two 2 ropes on the splints or corrugated paper to protect the unit and hang the unit as shown below Do not remove paper frame and plastic band Apply rope on the splints or corrugated paper their minimum thickness must be 15mm Do not apply any force to this plate Both sides Apply rope through the square hole Rope position Rope Rope i Square hole Square hole NII loo m E LJ L LJ L O CORRECT INCORRECT For installation RAS 14 24 FSN2 Hang the unit without removing the packaging with four 4 ropes Push thr
274. onnect inside the electrical control box SMGB0049 rev 2 08 2010 Outdoor units FSN2 207 HITACHI ed Inspire the Next Service Manual 9 1 5 Removing compressor When collect the refrigerant by operating the compressor refer to Method of Collecting Refrigerant In other cases collect the refrigerant before starting the work and turn OFF the power source of the unit G NOTE Do NOT touch the compressor and the high pressure refrigerant piping in operation or immediately stopping the unit because of the high temperature When removing the wiring or reassembling the compressor pay attention not to touch the wiring with the compressor or the refrigerant piping 1 Remove the front service panel according to the item Removing Front Service Panel In case that the outdoor unit is installed closely to the wall remove the refrigerant piping and move the outdoor unit away from the wall 2 Release the tack for top cap of the compressor and remove the top cap 3 Remove the Td thermistor on the top of the compressor NOTE The thermistor holder thermistor fixing plate and the waterproof cover are used again when reassembling Keep them in a box so that the parts are stored correctly NOTE When removing the compressor the electrical control box located above the compressor may disturb removing waterproof cover In that case the electrical control box should be removed before starting work If not the inner
275. operation ON Ae 123456 Test heating operation Compressor forced stop ON Wade 123456 Operation for exchange compressor SMGB0049 rev 2 08 2010 35 Electrical wiring for the outdoor unit HITACHI Inspire the Next E DSW5 Optional function setting Setting is required for the following optional functions Setting before the shipment Except compressor N 1 Except compressor N 2 m39 em a NOE NET NET on on on E E LE ong om om on on oN1 NEO AN NEO om om om Except compressor N 3 mg NET orm LE oun on EN ool Except compressor N 4 Except compressor N 5 Judgement for refrigerant charge measurement Selection of the input signal a39 aa9 a a9 NET NET NET NET on on on on E LE E AOE om om orm om on orm on on AXUM NOI NE NE om om om om Function setting ll DSWE Piping lenght setting Setting is required ll DSW7 Power supply setting Setting is required ON PELET 12345678 Setting before the shipment and total length 25m ON I 12 25m s Total length 50m ON Bu 12 50m sTotal length 75m ON aA 12 75m 2 Total length ON Aa 12 Setting before the shipment 380V ON aA 12 415V ON HE 12 SMGB0049 rev 2 08 2010 Electrical wiring for the outdoor unit Electrical wiring Service Manual Electrical wiring HITACHI Service Manual Insp
276. or by setting the DSW so that a broken compressor will not work You can set the exclusion of the compressor by setting the DSW5 1 DSW5 6 of the PCB1 DSW5 1 ON Compressor No 1 52C1 Inverter compressor DSW5 2 ON Compressor No 2 52C2 DSW5 3 ON Compressor No 3 52C3 and the others 6 Pre Pump Down by means of the Cooling Process Start the test run of the cooling process DSWA 1 ON The test run should run for approximately 20 minutes until the test run reaches PS gt 0 3Mpa Td gt 75 C as a rough target Display of Ps in seven seconds of the outdoor PCB Close the gas stop valve quickly Then perform the enforced stoppage DSW4 4 ON when Ps 0 2Mpa Setthe DSWA 1 to OFF in order to cancel the test run of the cooling Set the DSW4 4 to OFF in order to cancel the enforced stoppage After closing the gas stop valve the decrease of Ps is fast To guarantee the reliability of the compressor make sure that the decrease does not reach PS 0 1Mpa when you perform the enforced stoppage 7 The compressor replacing mode is performed The DSWA 6 on the outdoor unit PCB ON The cooling is run This operation is performed for up to a maximum of ten minutes Ifthe inverter compressor is excluded the operation starts after three minutes 8 The operation finishes when one of the following conditions occurs 1 Ten minutes have passed and STP is displayed i
277. or operation and maintenance as shown in the next figures Install the outdoor unit where good ventilation is available Do not install the outdoor unit where is a high level of oil mist salty air or sulphurous atmosphere Install the outdoor unit as far as practical being at least 3 meters from electromagnetic wave radiator such as medical equipment Keep clearance between the units of more than 50 mm and avoid obstacles that may hamper air intake when installing more than one units together Install the outdoor unit in the shade or not exposed to direct sunshine or direct radiation from high temperature heat source A CAUTION Check to ensure that the foundation is flat level and sufficiently strong Install the unit in a restricted area not accessible by the general public Aluminum fins have very sharp edges Pay attention to the fins to avoid injury A CAUTION Pay attention to the followings to run through the cables under the unit using conduit for piping and wiring works The pipe cover is required to remove before performing piping and wiring works 1 Attach the pipe cover to avoid entering rats or other small animals into the unit 2 Completely seal the conduit inlet with sealing materials 3 Make a drain hole at the lowest part of the conduit Before installation work check the availability of the following parts that are packed inside the outdoor
278. ough the wire ropes into the hang hole and clamp the wires by using shackle as shown below Wire rope Do not remove wooden frame and a Plastic band Angle of wire more than 60 Do not apply any force to this plate Both Sides Push through wire rope into the hang clamp it by using shackle SMGB0049 rev 2 08 2010 5 Transportation and handling HITACHI Inspire the Next Units installation Service Manual For installation RAS 26 42 FSN2 Hang the unit without removing the packaging with four 4 ropes Push through the wire ropes into the hang hole and clamp the wires by using shackle as shown below Wire rope Angle of wire more than 60 Wooden top frame Do not remove wooden frame and plastic band Do not apply any force to this plate Both Sides Sa URN AU UA AY Y mmm UR AN Lead wire ropes through the hanging hole and clamp wire ropes by using shackles Wooden base For installation RAS 44 48 FSN2 Hang the unit without removing the packaging with four 4 ropes Push through the wire ropes into the hang hole and clamp the wires by using shackle as shown below gt Angle of wire more than 60 Wooden top frame peg f Do not remove wooden frame and plastic band j Do not apply any force to i this plate Both Sides y y j Lead wire ropes through the hanging hole and clamp wire ropes by using shackles Wi
279. ount 6 4 1 Automatic judgement system for refrigerant amount 6 4 2 Simple judgement system for refrigerant amount Troubleshooting 7 1 1 Checking by means of the 7 segment display 7 1 2 Emergency operation 7 1 2 Failure of the power supply to the indoor unit and the remote control switch 7 1 3 Abnormal transmission between the remote control switch and the indoor unit 7 1 4 Abnormal operation of the devices Troubleshooting procedure 7 2 1 Alarm code indication of remote control switch 7 2 2 Troubleshooting by alarm code 7 2 8 Troubleshooting in check mode 7 2 4 Troubleshooting by means of the 7 segment display 7 2 5 Running current of the compressor 7 2 6 Protection control code on the 7 segment display 7 2 7 Activating condition of the protection control code Procedure for checking each main part 7 3 1 Self checking procedure of PCB by means of the Remote Control Switch 7 3 2 Self Checking procedure of the Remote Control Switch 7 3 8 Self Checking procedure of the Indoor Unit PCB only for RPK 7 3 4 Procedure of checking other main parts Spare parts RAS 8 12FSN2 Cabinet and fan RAS 8 12FSN2 Refrigerant cycle RAS 8 12FSN2 Eelectrical equipment RAS 14 24FSN2 Cabinet and fan RAS 14 24FSN2 Refrigerant cycle RAS 14 48FSN2 Electrical equipment RAS 14 48FSN2 Electrical equipment Servicing Outdoor units FSN2 9 1 1 Removing air intake grille 9 1 2 Removing front service panel 9 1 3 R
280. position of the fan runner Outdoor unit propeller fan is hitting the shroud Visually inspect it Adjust the position of the propeller fan Cooling or heating process with an abnormal sound Abnormal sound from the compressor Faulty Installation Check that each part is tightly fixed Tightly fix each part Liquid ref compression Check expansion valve opening Ensure superheat Wear or breakage of the internal comp parts Abnormal Sound from the Inside of the Compressor Replace the compressor No heating by the oil heater Check the Resistance Oil Heater Fuse Replace the oil heater or the fuse Humming sound from the magnetic conductor Check the surface of the contacts Replace the magnetic switch Abnormal vibration of the cabinets Check each fixing screw Tightly fix each screw Outdoor fan does not operate when the Obstacle at the outdoor fan Check the obstacles Remove the obstacles compressor operates Watching condition for the heating process Wait for the switching of the 4 Way Valve 1 3 minutes If the 4 Way Valve does not switch check for insufficient refrigerant Indoor fan does not Discharge pressure does not increase higher than 1 5 MPa due to the insufficient refrigerant Check the operation pressure 1 Add the refrigerant operate when the Disconnected Wiring for the Indoor Fan Check t
281. pressor 261 10 5 1 Reliable mechanism for low vibrating and low sound 261 10 5 2 Principle of compression 261 11 Field work instruction 263 11 1 Checking the power source and the wiring connection 264 11 2 Burnt out compressor due to an insufficient refrigerant charge 264 11 3 Insufficient cooling performance when a long piping is applied 265 11 4 Alarm Code 31 265 11 5 Not cooling well due to insufficient installation space for the outdoor unit 266 11 6 Caution with the refrigerant leakage 267 11 6 1 Maximum permissible concentration of the HFC Gas 267 11 6 2 Calculation of the refrigerant concentration 267 11 6 3 Countermeasure for the refrigerant leakage according to the KHK standard 267 11 7 Maintenance work 269 11 7 1 Pump down method for replacing the compressor 270 SMGB0049 rev 2 08 2010 Model codes Service Manual 0 Model codes and descriptions Unit code list MODEL CODIFICATION manual FSN 2 E INDOOR UNITS 4 Way Cassette 4 Way Mini Cassette 2 Way Cassette Unit Code Unit Code Unit Code RCI 1 0FSN2E 7E400001 RCIM 1 0FSN2 60278011 RCD 1 0FSN2 60278029 RCI 1 5FSN2E 7E400002 RCIM 1 5FSN2 60278013 RCD 1 5FSN2 60278030 RCI 2 0FSN2E 7E400003 RCIM 2 0FSN2 60278014 RCD 2 0FSN2 60278031 RCI 2 5FSN2E 7E400004 RCD 2 5FSN2 60278032 RCI 3 0FSN2E 7E400005 RCD 3 0FSN2 60278033 RCI 4 0FSN2E 7E400007 RCD 4 0FSN2 60278034 RCI 5 0FSN2E 7E400008 RCD 5 0FSN2 60278035 RCI 6 0FSN2E 7E400009 T x 9 s MM n RCI R
282. put 1 Fixing Heating Operation Mode Operation Signal Fixing Cooling Opeation Mode Demand Stoppage Alarm Signal Compressor ON Signal Snow Sensor Outdoor fan ON OFF Defrosting Signal Forced Stoppage Demand Current Control 6096 Demand Current Control 7096 cojo j jojo on2 ol nm Demand Current Control 8096 Demand Current Control 10096 Each input terminal and output terminal setting as shown below Input Output Terminal Indication Connector Setting Function SEG2 Pin No Control Function No Input 1 CN17 1 2 Fixed Heating Operation Mode 1 Input 2 CN17 2 3 Fixed Cooling Operation Mode 2 Input 3 CN18 1 2 Demand Stoppage 3 Snow Sensor Outdoor fan ON OFF 4 Forced Stoppage 5 Demand Current Control 6 to 9 Output 1 CN16 1 2 Operation Signal 1 Output 2 CN16 1 3 Alarm Signal 2 Compressor ON Signal 3 Defrosting Signal 4 SMGB0049 rev 2 08 2010 Outdoor units Setting before Shipmen Available optional functions H ITACHI Inspire the Next Service Manual In the case that the setting change only with the mark of the table in the previous page is required at site perform the following procedures 1 Set DSW5 7 of the outdoor PCB at the ON side while the main power to the outdoor unit is being supplied By setting function selection mode is available and the following appears on the 7 seg
283. r PCB is defective 4 Outdoor temperature C H H d or i 255 5 Indoor unit heat exchanger an me TIE or gas pipe temp C Wt L Mem Temp for top of comp Uo i l Evaporating temp at mr Refer to section Self Checking Procedure 6 ania CO P H h HH 4 T by means of the Remote Control a l E NOTES 1 During the transient periods such as starting time and other the indicator may be displayed for a limited time 2 All the data during the check mode 2 will be changed 7 Control information H rm T to 00 if a power failure occurs during alarm indication l 8 ESGRaIdd gas temp atthe Z I LL This indicates the internal information for the remote control switch top of comp chamber C UL tut E This does not have any specific meaning The average temperature of running compressors is indicated SMGB0049 rev 2 08 2010 163 Troubleshooting procedure HITACHI Inspire the Next Compressor pressure frequency indication 9 Discharge pressure Ir n pa high x 0 1 MPa mi l 10 Suction pressure low x I n bt 0 01 MPa Ut LU J 11 Control information Hn h H H l 12 Operating frequency Hz Hn il H H l Expansion opening indication 13 Indoor unit expansion m 2 n valve opening 96 Urt LL i 44 Outdoor unit expansion DH nd I c valve opening
284. r a Z a i x Harney 4 5B 79 ey EPE M s 1 psw2 psw3 Indication of stoppage cause 2nd History AC Alarm Code nn h i c d1 Retry Stoppage Code Stoppage Cause H Fan Controller Retry Inv retry Psw2 Psws LE Ya J o4 et r a Z Ila A 4 er7 ia ear dg EPE d psw2 T Psws Indication of FTC 1 iT Except Inverter Retry 1 iT Stoppage Code Inverter Stoppage Cause Psw2 7 Psws i 15th History i Oldest aal tE UUU a Accumulated time when alarm occurs Fan Controller Psw2 Psw3 retry III aala C L IE Il ee a a 2p i 34 J W LE 4 1 i psw2 Psw3 Indication of FTC bL ELULEEE Spe EERE EE ESED Spencer nee ess ere were ese serge Ded F1 Except Fan Controller F rt F1 Stoppage Code Fan Controller 1 LI F2 Stoppage Code Fan Controller 2 Psw2 Psw3 L r1 E E Psw2 psw3 2 Deletion of Alarm Code History Press PSW1 for 5 seconds to clear the alarm code history while displaying the history data All history can be deleted PSW2 4 Psw3 SEG2 7 7 FI SEG r LL PSW2 v PSW2 v L4 Press PSW1 for 5 sec while the story data is displayed Psw3 Psw2 Psws SMGB0049 rev 2 08 2010 112 Troubleshooting Service Manual 3 Register of Alarm Code History HITACHI Inspire the Next
285. r source Tightly fix the screws Deterioration of the contact of the magnetic switch for the compressor Replace the magnetic contactor Seizure of the compressor bearing Locked up Replace the compressor Insulation failure of the compressor motor Measure the insulation resistance Replace the compressor Check the continuity during the Fault Replace CT when faulty stoppage Incorrect Measure the resistance by Remove looseness and replace Faulty CT connection means of the tester the connectors Incorrect wiring Check the wiring Correct the wiring SMGB0049 rev 2 08 2010 146 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description Lt tot Activation for protecting the system from the low compression ratio W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when a compression ratio Pd 0 1 Ps 0 06 is calculated from a discharge pressure Pd MPa and a suction pressure Ps MPa and the condition which is lower than 1 8 occurs three or more than three times in one hour lt Does the inverter op
286. r than 840 kQ during the cooling process or the heating process The system is automatically restarted when the fault is removed PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB No Freeze protection Is THM3 connected to of i PCB Connect it thermistor THM3 Yes Is the resistance of THM3 between 0 24kQ and 840kQ Faulty thermistor Refer to the thermistor resistance in Alarm 11 In case of 4 way cassette Faulty PCB Action Phenomenon Cause Check item Turn OFF the main switch Fault Check the resistance Replace the thermistor if faulty Faulty freeze protection thermistor Incorrect connection Check the wiring to PCB Connect wiring correctly Replace PCB and Faulty PCB check the operation Replace PCB if faulty SMGBO0049 rev 2 08 2010 132 Troubleshooting procedure Troubleshooting HITACHI Service Manual Inspire the Next Alarm code Description Lt Abnormal operation of the thermistor for the indoor unit heat exchanger gas st refrigerant pipe temperature gas piping thermistor W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the thermistor
287. rankcase heater After applying current for more than 3 hours measure insulation resistance again Depending on the air conditions pipe length or refrigerant conditions it may be necessary to apply the current for a longer period of time Check the insulation resistance and reconnect the compressor If the leakage breaker is activated check the recommended size shown in Table 6 1 NOTES Confirm that field supplied electrical components main switch fuse fuse free breaker earth leakage breakers wires conduit connectors and wire terminals have been properly selected according to the electrical data given in this Technical Catalog of the unit and ensure that the components comply with national and local codes Use shielded wires 20 75mmz2 for field wiring to protect electrically noise obstacle Total length of shielded wire shall be less then 1000m and size of shielded wire shall comply with local codes Check to ensure that the terminal for power source wiring terminals L1 to L1 and N to N of each terminal board AC 380 415V terminals R to L1 and S to L2 of each terminal board AC 220V If not some component will be damaged SMGB0049 rev 2 08 2010 Checking procedure before the test run Test run HITACHI Service Manual Inspire the Next 6 2 Test run procedure from the outdoor unit side The test run procedure from the outdoor unit side is shown below You can
288. re firmly with plastic ties Retighten the compressor screws after replacing Ring terminal Terminal cover I S op tie Mark band Compressor power line Cross slot screw only constant speed compressor E1000GH Direction to remove the cover Waterproof cover Constant Speed Compressor E656DH E1000GH Inverter compressor E656DHD Constant speed compressor E656DH Constant speed compressor E1000GH SMGBO0049 rev 2 08 2010 Outdoor units FSN2 209 9 HITACHI Inspire the Next 6 Release the spring to remove the oil heater Oil heater Inverter Compressor E656DHD 7 Disconnect the discharge and the suction pipes from the compressor Check that the pipe inside pressure is equal to the atmospheric pressure Cut the pipe at the closer position to the compressor from the brazing part After cutting remove the pipe from the brazing part of the compressor NOTES 1 All the pipes are connected by brazing When applying the burner to the pipe connections the oil adhered inside the pipe may burn When brazing clear the flammable materials around the compressor 2 Burner work under applying gas pressure is very dangerous Make sure to cut the pipes first before burner work SMGB0049 rev 2 08 2010 210 Outdoor units FSN2 Servicing Service Manual Oil heater Spring Constant Speed Compre
289. re rope Wooden base 7 NOTES In case of transportation after removing wooden base hang the unit as shown in figures above In case of transportation after unpacking protect the unit with the splints or cloth A WARNING Do not put any foreing material into the outdoor unit and check to ensure that none exists in the outdoor unit before the installation and test run Otherwisea fire or failure etc may occur SMGB0049 rev 2 08 2010 Transportation and handling Units installation HITACHI Service Manual Inspire the Next When using handles When manually lifting the unit using the handles pay attention to the following do not remove the wooden base from outdoor unit to prevent it from overturning paying attention to the center of gravity as shown in the below figure Two persons are needed to move this unit E FSN2 Model RAS 8 12FSN2 HH yi jl Model Dimension X Y Z RAS 14 16FSN2 850 630 365 RAS 18 20FSN2 780 605 345 RAS 22 24FSN2 755 600 335 Model Dimension X Y Z RAS 26 28FSN2 1635 630 345 RAS 30 36FSN2 1575 615 340 RAS 38 42FSN2 1465 600 325 SMGB0049 rev 2 08 2010 7 Transportation and handling Units installation HITACHI Inspire the Next Service Manual 1 3 Outdoor units installation A WARNING Install the outdoor unit with sufficient clearance around it f
290. rged refrigerant Check Expansion valve opening Correctly charge the refrigerant Non condensate gas in cycle Check each temp and each pressure Charge the refrigerant after the vacuum pumping Clogging of the discharge piping Check for clogging Remove the clogging Failure or malfunction of the expansion valve Check for clogging Remove the clogging Check the connection cord and the connector Replace the connector Is there an operation sound from the coil Replace the coil Is the thermistor on the compressor normal Replace the thermistor Is the thermistor installed correctly on the compressor Correctly install the thermistor Malfunction or internal leakage of the 4 way valve Check the temp difference at the inlet and the outlet of the 4 way valve Replace the 4 way valve Excessively low suction pressure Failure of bypass solenoid valve Checking for leakage of solenoid valve Replace solenoid valve Malfunction or internal leakage of the 4 way valve Check the Temp Difference between the Inlet and the Outlet of 4 Way Valve Replace the 4 way valve Discharge temp of the indoor unit is unstable Check the expansion valve of the indoor unit in the same system Replace the failed expansion valve of the indoor unit SMGB0049 rev 2 08 2010 106 Initial troubleshooting Troubleshooting Service Manual
291. rged Indication LED2 on PCB2 Frequency LOW Frequency HIGH All bit 1 All bit 1 Operation PER Main parts Service Manual 254 gt The changing speed dependes on the outer setting Output 10 sec Activation recovery SMGB0049 rev 2 08 2010 Inverter Transmit error 30 sec Protection activation HITACHI Inspire the Next Main parts Service Manual 10 1 3 1 Excessive High or Low Voltage for Inverter a Level of Detection When the voltage of direct current is greater than 750 V abnormalities are detected When the voltage of direct current is smaller than 350 V abnormalities are detected b Function When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1 c Cancellation of Protection Function Transmission for signal code of stoppage cause is cancelled when a stopping order is given or main power source is cut off 2 Abnormality of Current Sensor a Level of Detection When current of the inverter compressor decreases lower than 1 5A an abnormality is detected b Function When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1 c Cancellation of Protection Function Transmission for signal code of stoppage cause is cancelled when a stopping order is issued or main power source is cut off 3 Overc
292. ring work cannot be performed If necessary use a joint adapter 3 Select clean copper pipes Make sure there is not dust and moisture inside Blow the inside of the pipes with oxygen free nitrogen to remove any dust and foreign materials before connecting the pipes 4 After connecting the refrigerant piping seal the open space between Knockout hole and refrigerant pipes by using insulation material as shown below Insulation material ji ERAS A Field supplied refrigeration pipe Unit side e Insulation material Insulation material A CAUTION Do not use a saw and a grindstone or other tools which cause copper powder When cutting pipes secure the part for brazing in accordance with both national and local regulations Use security glasses and gloves for cutting or welding works 48 SMGB0049 rev 2 08 2010 Piping work considerations Piping installation HITACHI Service Manual Inspire the Next E Piping Connection When connecting liquid piping for units with piping longer than 15 meters apply a piping size of 29 53 mm 3 8 inches Fix the connecting pipe as shown in the following figure using the insulation attached to the Indoor Unit Insulate this part with the Fix this part with the attached
293. roller is ON operation lower than 20 Hz A Replace it a ne a N N No Fan stops when L frequency increases gt Approx 20 Hz to 60 Hz Is connection correctly at fan No controller Connect correctly pe No Is the fuse cut out Yes Outdoor unit PCB1 display indication r1 1 lt Lt G Abnormal of fan controller 1 Replace fuse a m Lt D Abnormal of fan controller 2 1 If the capacitor has a high voltage perform the high voltage discharge procedure 2 Check the wiring connection according to the checking procedure of fan controller SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alarm code Description ror Le Decrease of discharge gas superheat W The RUN LED flickers and ALARM is displayed on the remote control switch E The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 Ifthe discharge gas superheat is below 10 C at the top of the compressor for 30 minutes the retry operation is performed However if the alarm occurs twice in addition to the first occurrence within two hours this alarm code is displayed
294. rom the check joint at the high pressure side with charging nitrogen and applying pressure Stop charging nitrogen after the oil discharge has completed Additionally charge the same quantity of oil discharged while vacuuming from the check joint at the high pressure side After above procedures are completed perform the vacuuming again and recharge the refrigerant NOTES 1 Use a clean charging hose 2 Perform this work in a short time within approximately 20 minutes and use the container with a small opening so that the refrigerant oil does not absorb the moisture in the atmosphere Oil separator A Flare nut at upper part of return oil circuit Return oil circuit Return Oil Circuit Position SMGB0049 rev 2 08 2010 218 Outdoor units FSN2 Servicing HITACHI Service Manual Inspire the Next RAS 14FSN2 to RAS 24FSN2 A Flare Nut at Upper Part of Return Oil Circuit B Flare Nut for Oil Separator Outlet Port Return Oil Circuit RAS 26FSN2 to RAS 42FSN2 figure for RAS 42FSN2 A Flare Nut at Upper Part of Return Oil Circuit Oil Separator B Flare Nut for Oil Separator Outlet Port Return Oil Circuit RAS 44FSN2 to RAS 48FSN2 A Flare Nut at Upper Part of Return Oil Circuit Oil Separator B Flare Nut for Oil Separator Outlet Port Return Oil Circuit Return Oil Circuit Position SMGBO0049 rev 2 08 2010 Outdoor
295. roubleshooting procedure H ITACH i Troubleshooting Inspire the Next Service Manual Alarm code Description 71 1 Abnormal operation of the thermistor for the outdoor temperature LL outdoor unit ambient thermistor W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the thermistor is short circuited less than 0 2 kQ or cut greater than 500 kQ during the operation However this alarm occurs during the test run mode only In the case that the thermistor is abnormal during the operation the operation continues based on the assumption that the outdoor temperature is 35 C Cooling 6 C Heating PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Is the thermistor THM7 TA No connected to PCB1 Connect it Yes Is the resistance of THM7 No between 0 24 kQ and 500 kQ Faulty thermistor Refer to Alarm code 11 Yes for thermistor resistance Outdoor unit ambient thermistor THM7 Faulty PCB1 A Action Phenomenon Cause Check item Turn OFF Main Switch Fault Check resistance Replace thermistor if faulty Faulty thermistor for the outdoor unit ambient Incorrect connection Chec
296. roubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual No Item Values Units Total of Thermo ON indoor unit pa z r1 02 capacity j x L4 0 9999 x1 8 HP 03 Running frequency of inverter 0 115 Hz compressor MC1 04 Number of running E r 0 5 compressors 05 Air flow rate n 0 16 Eid 06 Outdoor expansion valve MV1 0 100 9L opening Outdoor expansion valve MV2 07 opening d 0 100 96 for 14 to 48HP Outdoor expansion valve MV3 08 opening x 0 100 96 for 26 to 48HP Outdoor expansion valve MV4 09 opening H 0 100 96 for 44 to 48HP Outdoor expansion valve MVB L z 10 opening E i z 0 100 Jo 11 Discharge pressure high d ti 0 55 5 52 MPa 12 Suction pressure low Z 0 22 2 21 MPa Discharge gas temp on the top o 13 at compressor MC1 TD1 Toa s Discharge gas temp on the top 14 of compressor MC2 TD2 Z 1 142 eC for 14 to 48HP Discharge gas temp on the top 4 15 of compressor MC3 TD3 lt i 1 142 C for 18 to 48HP Discharge gas temp on the top Y rni 16 lof compressor MC4 TD4 r1 1 142 C for 30 to 48HP Discharge gas temp on the top r n 17 lof compressor MC5 TD5 Z Ii 1 142 C for 38 to 48HP SMGB0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next
297. rt of flare nut if the procedure Apply pressure gradually with nitrogen gas from the may not be followed check joint at low pressure side push the refrigerant oil in the oil separator with the pressure and take it out from charge hose at the release side 5 Remove charge hose at the low and high pressure sides Make sure that there is no pressure increase of the low check joint so that the low pressure side of the refrigerant pressure side after collecting the refrigerant cycle will be the atmosphere pressure Disconnect the Make sure that the refrigerant cycle is the atmosphere charge hose at charge port of return oil circuit pressure Otherwise problems such as the blowing of gas and the suction of the cutting material may occur when removing the comp 6 Perform replacing comp return oil circuit and electrical Removing electrical box may be required parts 7 With the electrical box mounted check the wrings by contacting except the power line for comp For the power line for comp insulate the wiring terminal with vinyl tape 8 Turn ON the main switch of O U This process is before removing and mounting electrical box 9 Set DSW4 4 to ON side O U PCB1 10 Set DSW4 6 to ON side O U PCB1 Power supply is ON auto address setting is completed and then STP is flashed on 7 seg O U PCB1 SVA is ON open 11 Charge the refrigerant oil For Process No 4 Work 2 Calculation for recharge quantity of refri
298. rts It is abnormal under the following conditions after the heating process for more than 30 minutes the discharge gas temperature of the compressor is not 10 C higher than the condensing temperature and there is no other faults such as an excessive charge of refrigerant and others Bl Checking of electrical coil parts Name of parts Model Electrical wiring diagram Wiring No E 0 AC fan motor for outdoor unit CCW8831 C D H RED WHT 7 19 at 20 C l necs m De DC fan motor for outdoor unit DMSBA8PHT WHT BLK 2 53 30W BLK RED 3 3 RED WHT at 20 C SMGB0049 rev 2 08 2010 Procedure for checking each main part 185 HITACHI Inspire the Next Bl Other parts Troubleshooting Service Manual Resistance OQ Name of parts Model at 20 C Solenoid valve for gas bypass Coil SR10PA Body SR 10D 1 250 Reversing valve Coil STF 01AJ502D1 50Hz 1 130 T Body STF 0712G 8 12HP Body VHV 1511G 14 24HP Body VHV 1516G 26 48HP Compressor Motor for Inverter Compressor E656DHD 0 51 Compressor Motor E656DH 1 77 for Constant Compressor E1000GH 140 186 SMGB0049 rev 2 08 2010 Procedure for checking each main part Troubleshooting Service Manual E Checking of compressor Check list on compressor HITACHI Inspire the Next Client Model Date Serial No
299. s lower than 88 of the rated current the operation is performed with the compressor frequency limited to the upper level frequency when the output current decreases lower than 88 of the rated one However if the frequency order is smaller than the maximum value the operation is performed according to the order c Cancellation of Protection Function After the operation described in the above item b is performed for 10 seconds this control is canceled SMGB0049 rev 2 08 2010 256 Inverter ito HITACHI Service Manual Inspire the Next 10 2 Thermistor Example RAS 30FSN2 o og o Thermistor for outdoor ambient temperature Heat exchanger Heat exchanger CN pipe SS gt THM10 11 15 16 Te Thermistor for T evaporating temperature qu UJ MC4 Mc N mc2 N THM17 Tchg I 5 Thermistor for super 4 cooling bypass line m temperature THM23 Tsc Thermistor for super cooling bypass line Thermistor temperature Tsc Tchg Thermistor holder E Thermistor for upper part temperature of compressor 200 for prevention of discharge gas overheating 200 a There is a thermistor that checks the temperature of the upper R25 200kQ part of the compressor in order to pr
300. se temperature a Instantaneous overcurrent a I a I n Lt Li LI a mj Si 4 a dl Z J ss m n al m Lu Aa Abnormal inverter fin thermistor 4d x Li x al Lu Vi Li Electronic thermal activation 4A Dx Li 4 Z Inverter voltage decrease Insufficient Voltage lt Dx X a S gt ra 4 Li 4 cr Voltage increase Z rn En a gt ra c 4 a Dni L 4 L ri Abnormal inverter transmission P Das 4 Li al y m Abnormal current sensor x Li J n Instantaneous power failure detection ri Reset of micro computer for inverter a J LI ri n Ud Li Ln 4 Earth fault detection for compressor only starting e Dx M m Daad a Fam DI D Z J Abnormal power source phase pg Dx Inverter retry a Vi Dx Li lt Li ri ri n Li Li SMGB0049 rev 2 08 2010 171 Troubleshooting procedure H ITACH i Troubleshooting Inspire the Next Service Manual Cause code of stoppage for Fan Controller content of check item Fi 7 Code Cause Automatic stoppage of the transistor module IPM Error overcurrent decrease voltage increase temperature ES Instantaneous overcurrent n
301. set this DIP switch while the power source is ON Setting of Dip Switch before shipment Printed circuit board of the outdoor unit PCB1 WARNING Do not touch any other electrical components while you are setting the switches on the PCB unit is operating Set all the DIP switches of DSW4 to OFF after completing the test run O O DSW4 1 Testrun For service 2 COOL HEAT setting ON Heating operation ON 3 OFF mixed ee O PEPPE 4 Manual compressor OFF 123456 p 5 Number of indoor units is more than 16 OFF Fixed 6 Compressor exchange operation O O Do not attach or detach the service access panel when the power source for the outdoor unit is ON and the outdoor Dip switch seting Operation Remarks OFF compressor DFF Set DSW4 4 at ON the compressor operation the compressor stops operating Testrun 1 Setting operation mode The indoor unit automatically Make sure that the indoor units start to operate in Cooling Set DSW4 2 OFF starts to operate when the test accord with the test run of the outdoor unit run of the outdoor unit is set f you start the test run from the outdoor unit and ON You can perform the ON OFF you stop the test run from the remote control mri operation from the remote switch the test run function of the remote control 123456 control switch or the DSW4 1 of switch is
302. setting value Upper limit of total running current is set to 8096 7096 6096 at normal operation using input on PCB1 Li q 2 X r Discharge gas SUPERHEAT decrease protection Temperature of discharge gas is low Td1 Pd saturation temperature 15 C Frequency increase Frequency is different depending on temperature of discharge gas Li 4 m X n Low pressure increase protection Low pressure 2 1 3MPa Frequency increase 4 Pressure ratio decrease retry Compression ratio Pd 0 1 Ps 0 06 lt 1 8 When it activates three times in 30 minutes the alarm code 43 is displayed i x DN ut Lu retry Overcurrent retry of constant speed compressor Current 2 Maximum value 1 or Current lt 1 0A Dx i Low pressure increase Ps gt 1 5MPa When it activates three times in 30 minutes retry the alarm code 44 is displayed RAI High pressure increase Pd gt 3 8MPa When it activates three times in 30 minutes the alarm code 45 is displayed When it activates three times in 30 minutes the alarm code 39 is displayed Li Ln Vacuum discharge gas temperature increase retry In Case of Ps lt 0 09MPa for over 12 minutes or discharge gas temperature 2 132 C for over ten minutes or discharge gas temperature 2 140 C for over five seconds When it activates three times in one hour the alarm codes
303. sor OFF ON 1 100 Inverter compressor frequency Hz 73 150 108 185 Target frequency Hz Control system Service Manual HITACHI Inspire the Next RAS 38 42FSN2 Constant No of running compr speed 2 compressor 1 OFF ON Inverter 190 compressor frequency Hz 30 Target frequency Hz RAS 44 48FSN2 No of running compr Constant 2 speed 1 compressor OFF ON 100 Inverter compressor frequency Hz quency Hz 25 108 185 262 339 Target frequency Hz SMGB0049 rev 2 08 2010 Standard control functions 63 Control system HITACHI Inspire the Next Service Manual Start Fan step at start Outlet air temp Tao Air flow Tao lt 5 C 15 di e 5 C lt Tao lt 11 C 25 i 11 C lt Tao lt 18 C 40 18 C lt Tao lt 25 C 52 p ea ha 25 C lt Tao lt 33 C 90 33 C lt Tao 100 4 min after start Discharge pressure Pd lt 2 3 MPa n Discharge pressure Pd 2 7 MPa Yes y Step down 1 Step up No step change lt a NOTES 1 In case that DSW3 1 DIP switch for setting piping length lift is ON Pd lt 2 5 MPa 2 In case that DSW3 1 DIP switch for setting piping length lift is OFF Pd lt 2 9 MPa SMGB0049 rev 2 08 2010 Standard control functions Control system Servic
304. ssor E656DH E1000GH Cut Suction pipe A Remove here by using burner c after cuting N Discharge Oil discharge pipe g pipe Mole HITACHI Service Manual Inspire the Next 8 Disconnect the oil discharge pipe from the compressor When disconnecting pinch and cut the pipe at the closer position to the compressor from the brazing part so that the refrigerant oil remained inside the compressor does not overspill from oil discharge pipe Before disconnecting the oil discharge pipe at the piping side check that the oil at the brazing part is completely removed G NOTES 1 If the oil discharge pipe is disconnected without I performing the above procedure for example applying burner directly to the brazing part the Oil refrigerant oil spilt from the oil discharge pipe is Discharge Pipe Remove here caught fire Make sure to follow the procedure for by using burner safety after cutting 2 DO NOT throw out the oil that is collected by the oil pan and others Oil quantity is measured afterward 9 Removing Constant Speed Compressor Only E1000GH Removing Slide Base Fixing Screw Remove the two 2 screws fixing the slide base Removing Compressor Pull the slide base with the compressor on towards front side and remove the compressor from the slide base 59 pus Fixing Screw M5 x 2 S E1000GH Slide Base SMGBO0049 rev 2 08
305. stem B mE Refrigerant 60 kg Refrigerant 50 kg B 110 1000 0 11 C 60 175 0 34 0 06 m Opening m D 60 175 0 34 0 06 m Opening k i E M C D 60 350 0 171 B B 3 i S 3 mi i i E 60 100 0 6 em 7min Ventilator linked Floor Floor Floor Floor 3 with gas leak detector vom 70m 400m 120m Gas leak detector Opening 0 06m Ventilator 2m min If local codes or regulations are specified follow them Example European Standard EN378 R410A Commercial office building class D occupancy MR CxV MR Maximum charge or leakange of refrigerant kg C Maximul allowable concentration 0 17 kg m V Volume of space m SMGBO0049 rev 2 08 2010 268 Caution with the refrigerant leakage Field work instruction HITACHI Service Manual Inspire the Next 11 7 Maintenance work Bi For the indoor unit and the outdoor unit 1 Fan and fan motor Lubrication All the fan motors are prelubricated and sealed at the factory Therefore no lubrication maintenance is required Sound and vibration Check for abnormal sounds and vibrations Rotation Check the clockwise rotation and the rotating speed Insulation Check the electrical insulation resistance 2 Heat exchanger Clogging Inspect the heat exchanger at regular intervals and remove any accumulated dirt and any accumulated dust from the heat exchanger You should also remove from the outdoor units other obstacles such as the growing grass a
306. stor Module E Checking Method of Transistor Module Outer Appearance and Internal Circuit of Transistor Module Over Heating z Protection Circuit SMGB0049 rev 2 08 2010 181 Procedure for checking each main part H ITACH i Troubleshooting Inspire the Next Service Manual Bl Checking procedure for transistor module IPM Remove all the terminals of the transistor module before check If items a to d are performing and the results are satisfactory the transistor module is normal Measure it under 1kQ range of a tester A CAUTION Perform the high voltage discharge procedure as described Do not use a digital tester a By touching the side of the tester to the P terminal of transistor module and the side of tester to U V and W of transistor module measure the resistance If all the resistances are from 1 to 5kO it is normal b By touching the side of the tester to the P terminal of transistor module and the side of tester to U V and W of transistor module measure the resistance If all the resistances are greater than 100kQ it is normal c By touching the side of the tester to the N terminal of transistor module and the side of tester to U V and W of transistor module measure the resistance If all the resistances are from 1 to 5kQ it is normal d By touching the side of the tester to the N terminal of transistor module and the side of tester to U V and W of transistor module
307. t and the total piping length 300m or more 2 During the refrigerant amount judgement the 7 segment display c h is flickered and the judgement operation is forced termination The causes of forced termination are following After resolved the cause of forced termination restart the refrigerant amount judgement again a When turned ON the power supply the automatic address setting operation is performed at the same time During this time No 6 pin of DSW5 is turned ON b Before turned ON No 6 pin of DSW5 other indoor unit has been operated c The indoor cooling load is decreased and the total of indoor units capacity is 3096 or less of the outdoor unit capacity SMGB0049 rev 2 08 2010 Judgement systems for refrigerant amount 89 Test run HITACHI Inspire the Next Service Manual d No 1 or No 4 pin of DSW4 is ON e At starting the judgement system operation for the refrigerant amount the indoor and outdoor air temperature is beyond the applicable range f The refrigerant cycle is varied widely In case except a to e it may be impossible to utilize the judgement because that the refrigerant cycle is varied widely This is due to the installation condition by lower indoor heat load etc In this case calculate the additional refrigerant according to the total piping length 3 It takes about 20 to 120 minutes for the automatic refrigerant amount judgement operation 4 The 7 segment in
308. t decrease protection 7 4 way valve switching control In relation to retry control the latest retrial will be indicated unless a protection control related to frequency control is indicated Protection control Q o Q D Code Protection control Li Pressure ratio decrease retry V Pressure ratio control au u a IAI mi j Pu High pressure rise protection Low pressure increase retry n ri H 1 PH Inverter current protection Ld High pressure increase retry n mut PI Inverter fin temp rise protection moi Overcurrent retry of constant speed compressor Dx mun Fan motor controller fin temperature increase Vacuum discharge gas temperature increase retry protection Dx lt mm Discharge gas SUPERHEAT decrease retry roc Discharge gas temperature increase protection Li 4 Inverter trip retry 7 LU Low pressure decrease protection a 4 Fan motor controller trip retry J A r3 Ba lt Reversing valve switching control ci Insuffcient voltage excessive voltage retry x sn ru E ra Oil return control a a 5E OI Hifh pressure decrease retry x Mg an Li Li High pressure decrease protection i P as m 1 4 Fan motor protection device retry M Demand current contr
309. t is shown beside 1 Connect the power supply wires to L1 L2 L3 and N L1 L2 L3 N 11 2 for 400V450Hz for the three phase power source on the terminal board Connect the ground wires to the terminals in the electrical box 2 Connect the control cables between the outdoor unit and the indoor unit to the terminals 1 and 2 on the terminal board 3 Do not run the wires in front of the fixing screw of the service access panel If you do so you cannot Power supply Control remove the fixing screw AC 400V cable RAS 8 12HP RAS 14 48HP Earth E Cord clamp 2 pcs SEELY Connection hole of power supply wiring 1 A 252 knock out hole 8 24HP gs 70 knock out hole 26 48HP LJ gs 9 Connection hole of operation wiring between outdoor H xi A unit and indoor units 26 knock out hole x 2 1 cR vu Ple Q U notch shape y w 4 Q Power source wiring H LA Operation wiring between outdoor units DC5V non pole NG Operation wiring between indoor units and outdoor unit DC5V non pole Q Electrical box 1 Seal hermetically the entry of conduit pipe by using putty etc for water protection A CAUTION Fix the shielded operation wires between the indoor unit and outdoor unit with a cord band at only one point You must connect the shielded operation wires to the earth of the indoor unit only 4 Before turning ON the
310. tact between 1 and 2 of CN14 is not closed over 120 seconds during the cooling process the heating process or the fan operation Is DC12V applied between 2 of CN14 and GND No PCB1 PCB Outdoor unit printed circuit board Indoor unit printed circuit board Activation of the safety device Faulty PCB such as float switch FS or incorrect wiring Example of RCD RPI and RPC Types NENNEN NENS THM THM2 THM3 THM4 THM CN1925 Q8 OM CNA NG 0 Phenomenon Cause Action becker Turn OFF the main switch High Drain Level Clogging of the drainage Remove the clogged Check the drain pan foreign particles Activation of the float Fault Sheer me continuity Replace the float switch if when the drain level is low faulty switch Faulty float switch Faulty contacting Fix the looseness and Replace the connector Measure the resistance by means of the tester Faulty connection Check the connections Repair the connection Faulty indoor unit PCB Check PCB by self checking Replace PCB if faulty Outdoor unit PCB display indication Indor unit Alarm code number for failure 114 SMGBO0049 rev 2 08 2010 Troubleshooting procedure Troubleshooting Service Manual HITACHI Inspire the Next Alkim ees Description H i d Activation of the safety device in the outdoor unit E The RUN
311. tallation Inspire the Next Service Manual Insulation Attach the pipe insulation to each branch using vinyl tape Attach also insulation to field supplied pipes in order to prevent the capacity decrease according to the ambient air conditions and dewing on the low pressure pipe surface Field supplied insulation Cap 7 NOTE When polyethylene foam is applied it is recommended the usage of a wall thickness of 10 mm for the liquid piping and 15 mm to 20 mm for the gas piping A CAUTION Perform the insulation work after the pipe surface temperature decreases to the room temperature if not the insulation material may melt If the ends of the piping system are open after ending the piping work attach caps or vinyl bags securely to the ends of the piping avoiding moisture and dust entering 20 SMGB0049 rev 2 08 2010 Piping work considerations Piping installation HITACHI Service Manual Inspire the Next In case of using refrigerant R410A in the refrigeration cycle the refrigeration oil should be of a synthetic type one In order to avoid oxidation pay much careful attention to basic piping work control to avoid infiltration of moisture or dust during the refrigerant piping work Three principles Cause of failure Presumable failure Preventive action 1 Dry Keep good dryness Water infiltration due to insufficient protection at pipe ends Dewing inside of pip
312. tdoor unit Check the solenoid valve SMGB0049 rev 2 08 2010 Replace SVA if leaking 147 Troubleshooting procedure HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description Lt ht Activation for protecting the system from excessively low suction pressure W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 n case that compressor is operated under the condition that is higher than 1 5MPa of suction pressure Ps for 1 minute all compressors are stopped and retry operation is started after 3 minutes However the alarm code is indicated when same phenomenon is occurred at two times within the next 30 minutes PCB1 Control PCB in Outdoor Unit PCB Indoor Unit PCB Yes Is there a leakage of SVA Replace SVA if faulty No Is the four way valve spindle Yes mounted at the middle position p Replace the four way valve if faulty No Is the low pressure sensor OK Replace the low pressure sensor if faulty Check whether the inlet air gt temperature of the indoor unit and the outdoor unit is too high Phenomenon Cause Check item Acn Turn OFF Main Switch Le
313. te control switch and the indoor unit HIGH COOL Butt ADDS RN Ll jl A C CHECK 2 In this troubleshooting procedure checking of the following parts of the PCB is not available PCB in Indoor Unit Relay circuit DIP switch option circuit fan circuit protection circuit PCB in Outdoor Unit Relay circuit DIP switch option circuit 3 If this troubleshooting is performed in the system by means of the central station the indication of the central station may change during this procedure However this is not abnormal SMGB0049 rev 2 08 2010 177 Procedure for checking each main part HITACHI Inspire the Next Cases where the CHECK switch is used 1 If the remote control switch displays a malfunction 2 For the regular maintenance check Troubleshooting Service Manual Only for the cancellation of EEPROM press the following three switches simultaneously during the changes of the LCD TEMP MODE e SMGB0049 rev 2 08 2010 178 Procedure for checking each main part To 1 Turn ON the power source Indicating No LCD Indication period Simultaneously press the following cec three switches During the operation 1 HGH TEMP 1
314. tempera ture area 70 f 60 50 30 L b 20 L 10 F 0 1 1 1 1 1 5 20 2 5 3 0 35 4 0 Discharge gas pressure MPa 61 Standard control functions HITACHI Inspire the Next Low temp area Saturated temp pressure curve HITACHI Inspire the Next Control system Service Manual The compressor operation control performs the output frequency of inverter compressor or run stop of constant operation according to the target frequency The target frequency is determined by PID calculation and cooling and heating load Therefore when the load is smaller the constant compressor may not operate RAS 14 16FSN2 Constant No of running compr speed compressor off 1 ON 100 Inverter compressor frequency Hz 30 Target frequency Hz RAS 22 24FSN2 Constant speed compressor OFF ON No of running comfr 100 Inverter compressor frequency Hz quency Hz 60 137 95 172 Target frequency Hz RAS 30 36FSN2 Constant No of running compr 2 speed 1 compressor OFF Inverter compressor frequency Hz 60 l 137 95 172 Target frequency Hz SMGB0049 rev 2 08 2010 Standard control functions RAS 18 20FSN2 No of running compr Constant speed compressor 2 100 Z Inverter compressor frequency Hz 30 46 96 81 131 Target frequency Hz RAS 26 28FSN2 Constant No of running compr speed compres
315. ter current sensor gs 1 12 Inverter PCB2 and IPM error d1 17 retry j diia eil 3 Inverter fin temp d1 1 RR 16 Inverter failure d1 18 retry 9 11 13 10 14 15 Abnormality of Inverter and other d1 18 retry 0 Actual frequency 0Hz ITC 0 Inverter comp in operation 56 14 Abnormality of detection for fan controller position 57 1 2 3 Activation of fan controller protection device 58 13 Abnormality of fan controller 16 Fan controller failure 4 11 Abnormality of Fan controller and other b5 Incorrect indoor unit No setting EE Compressor protection Alarm Code 02 07 08 39 43 44 45 47 d1 05 retry Instantaneous power failure without micro computer reset d1 05 retry Instantaneous power failure with micro computer reset d1 26 retry Abnormality of high pressure decrease Only for retry stoppage caused by Inverter PCB and fan controller Other causes SMGB0049 rev 2 08 2010 443 HITACHI Inspire the Next Troubleshooting Service Manual Alarm code Description i H Activation of the safety device in the indoor unit W The RUN LED flickers and ALARM is displayed on the remote control switch W The unit number the alarm code and the unit code are alternately displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the con
316. the detection circuit will not interfere with the normal operation 2 There is a case where the operation is automatically stopped after the automatic operation when the remote control switch is or rir are displayed at the A part the remote control m arg Lt y Ln activated again SMGB0049 rev 2 08 2010 Procedure for checking each main part 179 HITACHI Inspire the Next f Troubleshooting HITACHI Inspire the Next Service Manual E Self checking procedure by means of the relays on the indoor unit PCB To check the abnormal operation on the indoor unit PCB due to a malfunction To check the abnormal operation on the indoor unit PCB according to the results of the checking procedure by means of the CHECK switch on the remote control switch and the self checking function E Procedure 1 Turn OFF the main power switch 2 Disconnect the connectors CN7 and CN8 3 Set the DIP switch DSW2 as shown below Set the 1 switch to ON and Z2 switch to OFF ON Ae 12345678 DIP Switch DSW2 4 Turn ON the main power switch Check Mode starts Refer to the next page A Analog Test B Relay Test 5 After finishing the self checking procedure turn OFF the power and reset the DIP switch as before Self checking procedures in the check mode for RPK FSNM Check item State of mode Confirmation method A Initialize Exp valve Exp Valve fully open fully closed and auto
317. the foundation to be flat leveled and strongly enough Install the unit in a restricted area not accessible by the general public Aluminium fins have very sharp edges Pay attention to the fins in order to avoid injury Do not install the indoor units in a flammable environment to avoid a fire or an explosion Check to ensure that the ceiling slab is strong enough If not strong enough the indoor unit may fall down on you Do not install the indoor units outdoor unit remote control switch and cable within approximately 3 meters from strong electromagnetic wave radiators such as medical equipment Do not install the indoor units in a machinery shop or kitchen where vapor from oil or mist flows to the indoor units The oil will deposit on the heat exchanger thereby reducing the indoor unit performance and may deform In the worst case the oil damages the plastic parts of the indoor unit To avoid any corrosive action to the heat exchangers do not install the indoor units in an acid or alkaline environment When lifting or moving the indoor unit use appropriate slings to avoid damage and be careful not to damage the insulation material on units surface This appliances are not intended for use by people including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision and instruction concerning the use of the appliance by a person responsi
318. the power supply 5 Start the operation by remote control switch b Operation condition Indoor unit operation capacity The compressor is forced to stop for compressor protection under the following condition Total capacity of thermo ON I U lt 50 of O U Capacity and Total capacity of thermo ON I U lt 10HP Small capacity of thermo ON indoor unit may cause a constant speed compressor failure because the compressor is operated and stopped repeatedly HITACHI Inspire the Next EXE SAA e Si eee cute c b 396692 Be DSW SWI ia Calif Fe 2 e md PSWI PSW2 PSW3 spoz m NOTES Measure the insulation resistance of inverter compressor Do not perform the emergency operation when the insulation resistance is 0 Q Other compressor may be damaged because there is a possibility that refrigerant oil may be oxidized Total operating capacity of indoor unit should be 10HP and over Less than 10HP Forced stoppage In this emergency operation compressor frequency cannot be controlled at each 1 Hz Therefore alarm code 07 43 44 45 45 or 47 may be indicated on LCD This emergency operation does not provide sufficient cooling and heating capacity This mehod is an emergency but a temporary operation
319. ting sound at the rear or right left sides is 3 to 6dB A A higher than the value in the catalog at the front side 300 h1 2 mm 1 Check to ensure that the foundation is flat level and 250mm SEDES sufficiently strong Do not install the outdoor unit where there is a high level of oil mist flammable gases salty air or harmful gt 500 h2 2 mm 2 gases such as sulphur and an acid or alkaline NNN environment 1 h1 Rear side wall height 500 mm Do not install the outdoor unit where the 2 h2 Front side wall height 500 mm electromagnetic wave is directly radiated to the electrical control box Install the outdoor unit as far as possible being at least 3 meters from the electromagnetic wave radiator When installing the outdoor unit in snow covered areas mount the field supplied hoods on the top of the outdoor unit and the inlet side of the heat exchanger SMGB0049 rev 2 08 2010 9 Outdoor units installation Units installation HITACHI Inspire the Next Service Manual In case that the front and either of the sides are open No limit to wall height i Wa e wawa BE F 250 Mi 250 300 No limit to wall height OJOO o 250 250 21 000 Provide a distance of 1000 mm to the next unit Incase that there is a sourou
320. to 48 FSN2 for the outdoor fan motor is higher than 130 C Is the continuity present after the No No temperature has dropped to under Dogs ic fen 83 C at the internal thermostat of Replace the motor the outdoor fan motor Yes Yes Is the connection bad at the connector PCN14 on PCB1 or the Yes Correct thec hnneition fan motor connectors CN55 CN56 CN58 Replace the connector No N If the voltage is over 242V o z or under 187V check the Is 220V applied across R1 and N1 on PCB1 or R1 and N1 of TB1 power source and check the wiring around the outdoor unit PCB Yes Replace the outdoor fan motor if faulty Or check the outdoor temperature If the outdoor temperature is unusual take a suitable action to reduce the outdoor temperature Action Phenomenon Cause Check item Turn OFF the main switch Activation of the internal thermostat for the outdoor unit fan motor Faulty Outdoor Unit Fan Motor Measure the coil resistance and the insulation resistance Replace the motor if faulty Check the continuity after the fan motor temperature decreases to the room temp Replace the fan motor if no continuity of the internal thermostat under 83 C Measure the resistance by means of the tester Correct Looseness Replace the connectors Fault Faulty internal Insufficient thermostat contacting Incorre
321. tor wiring when removing the expansion valve coil NOTE Make sure to remove the coil bracket from the coil before pulling it out If not your hand may be hit against the piping as a reaction Follow the above procedure carefully to avoid any injuries Turn the coil and remove the coil bracket from the slot Coil bracket Rotating direction Expansion us valve coil Expansion Valve M H M M M Correct Correct position for coil bracket MEM c Fitted in the slot Expansion valve coil Expansion valve SMGB0049 rev 2 08 2010 236 Outdoor units FSN2 Servicing Service Manual 3 For replacing the expansion valve coil press the coil into the expansion valve slot with turning the coil If an excessive force is applied to the coil the coil bracket may be deformed As a result the coil cannot be fixed at the correct position as shown in the figure Any slots on the expansion valve inner surface is acceptable to fix G NOTE The expansion valve coil should be fixed with the force of 60N or less After fixing check the expansion valve coil position Expansion valve coil Expansion Valve Coil bracket Incorrect Deformed coil bracket due to excessive force Expansion valve coil Expansion d Not fitted firmly due to insufficient force b Expansion W valve coil f n Expansion v
322. tput 2 Defrosting signal Control function No 4 Auxiliary relay contacting RYa is closed during the defrosting Setting Example Defrosting Stoppage at Output 2 between 1 and 3 pins of CN16 Auxiliary relay 3P Connector housing peer oue E Outdoor unit PCB1 CN16 Connector Wiring diagram example of defrosting signal Table 5 2 Specifications of required main parts Parts Specifications Auxiliary Relay High Power Relay LY2F DC12V made by OMRON Do not use the relay with diode built in Refer to the table 5 1 for the connector parts Function Setting from PCB 1 Set DSW1 4 of outdoor PCB at the ON side for the prevent of the compressor activation by operation mistake 2 Set DSW2 5 of the outdoor PCB at the ON side while the main power to the outdoor unit is being supplied during outdoor unit stoppage 3 By setting function selection mode is available and the following appears on the 7 segment display SMGB0049 rev 2 08 2010 Outdoor units Available optional functions H ITACHI Inspire the Next Service Manual 9 10 10
323. trical Control Box Disconnect the connector for the motor in the electrical control box 4 Remove four 4 screws fixing the motor and remove the motor AC Fan Motor M8 DC Fan Motor M5 5 When reassembling the outdoor fan perform in the reverse procedure for removing NOTES 1 The cord outlet end of the motor should be downward facing when mounting the motor Make the wire trap 2 Fix the motor wire onto the motor clamp with the plastic tie to avoid contact with the propeller fan 3 When mounting the propeller fan put and push the propeller fan with matching the mark with the cut out part of the motor shaft Firmly fix the propeller fan with 30N m torque after the head of the fan shaft comes up Torque for Mounting Propeller Fan 30N m 4 Connect the motor wire connector with the wire connector in the electrical control box 6 Check that the gap between the propeller fan and the upper cover is even by observing from the upper cover top Also check that there is no noise caused by contacting propeller fan with the upper cover during the propeller fan operation ll RAS 12FSN2 Example Fan motor Motor shaft Cord outlet end should be downward facing AC Fan motor M8 DC Fan motor M5 Motor clamp Shroud Faby L 2 Electrical box cover Upper cover Motor cable Wire connector C
324. trips after Does it trip i Good occasionally a certain period Is there any cause No of instantaneous b Check the compressor voltage decrease Yes e Check the power source capacity Good Check the transistor N f aulty Replace the transistor Replace PCB2 module IPM 1 gt module Y Is the compressor running Yes current as same as rated Check the compressor current 3 No Faulty Y Check the diode module 2 gt Replace the diode module Good y Are the input currents of Yes three phases nearly equal gt Replace PCB2 X396 No y Check the power supply Is the supply voltage No Lf 380 415V 50Hz 10 gt Yes Is it 323V or more during No operation gt i Yes Is it 323V or more during No operation when other devices are operating Check the capacity and wiring of the power source Yes gt Replace PCB2 1 Regarding replacing or the checking method for inverter parts refer to the item Procedure of checking other main parts 2 Before checking of diode module refer to the item Procedure of checking other main parts 8 Regarding the setting value of activation current refer to the item Specifications of inverter SMGB0049 rev 2 08 2010 152 Troubleshooting procedure Troubleshooting
325. troller PCB1 Control PCB in Outdoor Unit PCB2 Inverrter PCB Check PCB2 and the wiring between PCB1 and PCB2 In case of 04 check the wiring between inverter and fan controller Outdoor unit PCB1 display indication ma ug Lt 1 Vt 1 ma l Lt 1 E V Abnormal transmiting of inverter H H Abnormal transmiting of fan controller 1 Abnormal transmiting of fan controller 2 Phenomenon Cause Check item Action Turn OFF the main switch Disconnected wires insufficient contacting or incorrect connection Between control PCB1 PCB2 and fan controller Power source wiring for the outdoor unit Check the continuity of wires Check for looseness of the connection screws Check the connection No Replacing wires repairing tightening screws and incorrect wiring Faulty PCB PCB1 and PCB2 Disconnected wires to PCB Check the connections Repair the wiring connections Faulty PCB Replace PCB if faulty Incorrect wiring Disconnected wires insufficient contacting Check the continuity Check for looseness of connection screws Replacing wires repairing tightening screws Incorrect wiring Check the connection Nos Correctly connect the wires Position of Surge Absorber SA A415VAC DA OR
326. uency of compressor x High insufficient refrigerant when TdSH is 15 to 45 degrees The 0 2 to 0 6 higher the operating frequency the higher the oE1 2 Is Pd 1 6 to 3 5 Low leakage of the SVA Pd is high when the indoor temperature solenoid valve is high High excessive gas pipe resistance 3 Is H1 compressor frequency CC Low excessive refrigerant number of running compressors 1 High insufficient refrigerant 38 abnormally low or high The lower excessive pipe resistance the room temperature and the outdoor temperature the higher the above value 4 Is Ps 0 2 tof 1 1 Low short circuit of the outdoor Only under the condition that the unit solenoid valve SVB is OFF Low High failure of the following components outdoor fan motor fan module DC remote control or outdoor air sensor 5 Is the temperature difference among Failure of components such as the indoor units more than 15 degrees the PCB the wiring the coil when iE indoor unit expansion valve the valve is 100 Excessive pipe resistance The temperature difference among the Failure of the thermistor for the indoor units means the following discharge air temperature b3 Discharge Gas Temperature b2 air inlet temperature that is displayed on the remote control Switch by means of the check mode However this is applicable only when b2 Air Inlet Temperature b1 setting temperature is higher tha
327. umber E Remarks Part name U77C 8HP 12HP SVF SVA SVB SVC 14HP 16HP SVF SVA1 2 SVB SVG SVC 18HP 28HP SVF SVA1 2 3 SVB SVG SVC 30HP 36HP SVF SVA1 2 3 4 SVB SVG SVC COIL FOR SOLENOID VALVE 38HP 42HP SVF SVA1 2 3 4 5 SVB SVG SVC 44HP 48HP SVF SVA1 2 3 4 SVB SVG SVC U77D 44HP 48HP SVA5 U78 U78A 8HP 48HP 40W OIL HEATER U78B 22HP 48HP 40 8W FOR E1000GH U79 8HP 48HP REVERSING VALVE ASS Y U81 8HP 48HP COIL FOR REVERSING VALVE U82A 8HP 48HP DCL REACTOR U82B 8HP 48HP TRANSFORMER U85A 8HP 48HP PCB2 INV PVO41 PRINTED CIRCUIT BOARD U85B 8HP 48HP PCB1 PO071 U85C 8HP 48HP FANM1 FAN CONTROLLER U89 8HP 48HP ACCUMULATOR U98A 8HP 48HP SIDE COVER LEFT U98B 8HP 48HP SIDE COVER RIGHT U98C 8HP 48HP SIDE COVER LEFT U98D 8HP 48HP SIDE COVER RIGHT U98E 8HP 48HP UPPER COVER U98F 8HP 24HP BELL MOUTH 26HP 48HP UPPER COVER U98G 8HP 24HP SERVICE COVER LOWER 26HP 48HP BELL MOUTH U98H 8HP 24HP SERVICE COVER UPPER SABINGIPASNEL 26HP 48HP SERVICE COVER LOWER U98i 14HP 24HP VERTICAL STAY FRONT 26HP 48HP SERVICE COVER LOWER U98J 14HP 24HP VERTICAL STAY BEHIND 26HP 48HP SERVICE COVER UPPER U98K 26HP 48HP SERVICE COVER UPPER U98L 26HP 48HP VERTICAL STAY FRONT U98M 26HP 48HP VERTICAL STAY BEHIND SMGB0049 rev 2 08 2010 200 HITACHI ies Inspire the Next Service Manual 9 Servicing Contents 9 Servicing 202 9 1 Outdoor units FSN2 203 9 1 1 Removing air
328. unit Accessory Quantity Purpose Flange gasket 1 Connection for refrigerant gas piping with RAS 10FSN2 to RAS 48FSN2 Pipe flange of refrigerant gas piping 1 Pipe with flare nut for refrigerant gas 1 Connection for refrigerant gas piping with RAS 8FSN2 piping 219 05 Pipe with flare nut for refrigerant 1 Connection for refrigerant liquid piping with RAS 26FSN2 to RAS 48FSN2 liquid piping 219 05 Rubber Bush 2 For connection hole of operation wiring 1 For connection hole of power source wiring Screw 3 Spare SMGB0049 rev 2 08 2010 Outdoor units installation Units installation HITACHI Service Manual Inspire the Next Install the outdoor unit where it is in the shade or it will not be exposed to direct sunshine or direct radiation E Installation place from high temperature heat source Install the outdoor unit with a sufficient space around Do not install the outdoor unit where dust or other is outdoor unit for operation and maintenance as contamination could block the outdoor heat exchanger shown Install the outdoor unit in a space with limited access to 2 general public 1 2 Do not install the outdoor unit in a space where a 1o seasonal wind directly blows to the outdoor heat Al exchanger or a wind from a building space directly TUA i blows to the outdoor fan
329. urrent Protection for Inverter 8 Level of Detection When the current detected by current sensor reaches 150 of the rated current overcurrent is detected Instantaneous Overcurrent When the current detected by current sensor exceeds 105 of the rated current continuously for 30 seconds or for 3 minutes in total during a 10 minutes period overcurrent is detected Electric Thermal Relay b Function When abnormalities are detected the inverter compressor is stopped and transmit the signal code of stoppage cause to PCB1 c Cancellation of Protection Function Transmission for signal code of stoppage cause is canceled by stopping order is issued or main power source is cut off 4 Protection of transistor module and IPM a Level of Detection When some of the output terminals between U and V V and W W and U of transistor module or IPM are short circuited an abnormality is detected When the running current of transistor module or IPM reaches Maximum Rated Current x 105 an abnormality is detected When an internal temperature is measured by internal thermistor of transistor module or IPM an abnormality is detected When the control voltage of transistor module or IPM decreases an abnormality is detected b Function When abnormalities are detected the inverter compressor is stopped and the signal code of stoppage cause is transmitted to PCB1 c Cancellation of Protection Function 1 Q Transmission for signa
330. uxiliary RAS 30 42FSN2 s EF10 Q EF9 Q EF8 O 1 d d Qd Se aaa S EF7 a cues emca ovca cuca EFF ey CA2 eal sgg LSS o V RAS 30 42FSN2 V RAS 38 42FSN2 RAS 26FSN2 to RAS 42FSN2 220V 60Hz Front side Main The interior of the electrical control box Main DCL EF13 EF14 RAS 38 42FSN2 B RAS 30 42FSN2 Front side Auxiliary z i FFB5 EF8 CMC4 EF TB3 f f FFB CA2 RAS 30 42FSN2 d RAS 38 42FSN2 PCB1 Control PCB in outdoor unit PCB2 Inverter PCB IPM Transistor module FANM1 2 Fan module DM Diode module DCL Reactor TF1 Transformer NF1 2 3 Noise Filter R1 2 RS 1 2 Resistor CA2 Capacitor for AC fan motor T CB 1 2 3 4 Capacitor T TB1 3 Terminal Board for Power source TB2 Terminal board for transmission CMC1 Magnetic contactor for inverter compressor CMC2 3 4 5 Magnetic contactor for constant speed EF1 2 Fuse for Inverter compressor Compressor EF3 4 5 6 7 8 9 10 Fuse for constant speed compressor EF11 12 13 14 Fuse for Fan Module FFB2 3 5 C
331. vious table Judgement 0 55 If total oE Total frequency lt 0 8 x Target value Insufficient refrigerant 0 50 If total oE Total frequency gt 1 2 x Target value S 0 45 Excessive refrigerant go Refer to the following table to use the target value in S 0 40 heating m 0 35 0 30 0 5 10 15 Examples Outdoor air temp C Cooling process Indoor units 4HP 4HP 4HP 2HP 2HP iE from the checking data 32 38 30 20 18 32 38 30 20 18 Calculate value d IE Hold Hold Hold Hold Hold Total of iE a 138 32 38 30 20 18 Total frequency b 130 80 50 constant comp frequency Judgement OK 0 7 lt a b lt 1 6 Heating process Indoor units Outdoor unit 4HP 4HP 4HP 2HP 2HP 16HP Ti indoor suction temperature 26 27 23 23 25 To outdoor temperature C 7 Total of oE a Total of frequency b 130 80 450 constant comp frequency Judgement OK a b x 20 of target value SMGB0049 rev 2 08 2010 Judgement systems for refrigerant amount Troubleshooting HITACHI Inspire the Net SOOO Service Manual f Troubleshooting Contents 7 Troubleshooting 92 7 1 1 Checking by means of the 7 segment display 93 7 1 2 Emergency operation 94 7 1 2 Failure of the power supply to the indoor unit and the remote control switch 100 7 1
332. w SMGBO0049 rev 2 08 2010 Outdoor units FSN2 203 HITACHI Inspire the Next Remove screws fixing the front service panel Service Panel eight 8 screws Front Panel six 6 Screws Slightly lift the panels upward and remove them E RAS 8FSN2 to RAS 12FSN2 Front Panel ll RAS 26FSN2 to RAS 48FSN2 figure for RAS 26FSN2 to RAS 42FSN2 Service Panel NOTES 1 When removing the front service panel remove the screws at the lower part of the panel first 2 When attaching the front service panel insert the hook in the bottom end of the square hole at the side panel as shown in the figure DO NOT insert the service panel lower end to the bottom base inside SMGB0049 rev 2 08 2010 204 Outdoor units FSN2 Servicing Service Manual NOTE When attaching removing the service panel pay attention not to be injured with the plate edge ll RAS 14FSN2 to RAS 24FSN2 Front Panel Front Panel Side cover Do not insert inside of Square hole bottom base x E we 3 Insert the hook firmly in the bottom end of the square hole Service panel Bottom base Servicing HITACHI Service Manual Inspire the Next Remove six 6 screws fixing the fan guard net Remove the fan guard net NOTE DO NOT apply the excessive force to the shroud plastic part to avoid deform
333. ween wires Check the insulation material for breaks Remove the short circuit and replace the fuse Short circuit of the control circuit to ground Measure the insulation resistance Remove the short circuit and replace the fuse Faulty solenoid coil for the magnetic switch for the comp motor Measure the resistance of coil Replace the magnetic switch and the fuse Failure of the outdoor unit fan motor Measure the resistance between the wires and the insulation resistance Replace the outdoor unit fan motor and fuse PCB1 power circuit failure Measure PCB1 output voltage 2 Replace PCB1 Disconnected wires insufficient contacting or incorrect connection Between outdoor unit and indoor unit Power source wiring for the outdoor unit Check the continuity of the wires Check for looseness of the connection screws Check the terminal Nos Replacing wires repairing and tightening the screws and the correct wiring Faulty PCB outdoor unit indoor unit Disconnected wires to PCB Check the connections Correctly connect the wires Faulty PCB Replace PCB if faulty Incorrect wiring Disconnected wire insufficient contacting Check the continuity and the looseness of connection screws Replacing wires repairing and tightening the screws Incorrect wiring Check the terminal Nos Correctly connect the wires 2 VCC12 GND2 12V
334. when the inverter compressor is damaged Therefore change the new one as soon as possible Turn OFF DSW5 of outdoor PCB1 after replacing the compressor If this setting is not performed the inverter compressor will be damaged SMGB0049 rev 2 08 2010 95 Initial troubleshooting HITACHI Inspire the Next 3 Emergency mode operation from PCB for constant speed compressor failure This operation is an emergency operation by the other compressor when the constant speed compressor is failed Alarms corresponding to constant speed compressor failure 23 Failure of discharge gas thermistor 39 Abnormality of running current at constant speed compressor a Procedure 1 Turn OFF all the main switches of outdoor and indoor units 2 Turn ON DSW5 of outdoor PCB1 as shown in the table below 3 Tum ON the power supply 4 Start the operation by remote control switch DSW5 Compressor HP 1 Inverter Compressor 14 48HP 2 Constant Speed Compressor 1 14 48HP 3 Constant Speed Compressor 2 18 48HP 4 Constant Speed Compressor 3 30 48HP 5 Constant Speed Compressor 4 42 48HP b Operation Condition Td Thermistor Td thermistor on the failure constant speed compressor is ignored by setting DSW5 If the thermistor is short circuited this operation is available SMGB0049 rev 2 08 2010 Initial troubleshooting Troubleshooting Service Manual
335. x ELB DC5V non pole transmission H LINK Il system Distribution b ll bi BN Distribution box or pull box MENTA CURAS S FUSE SON e eee dy ae Main switch L l T d EN 3N 380 415V 50Hz Remote control Remote control 1N 3N switch cable switch cable m Nn 220 240V 50Hz shielded twist shielded twist D 1 D a pair cable pair cable TS yr Remote control Switch PC ART TB Terminal board PCB Printed circuit board Field wiring X J Field supplied 3 No 0 system indoor units No 1 system indoor units Optional accessory SMGB0049 rev 2 08 2010 39 Common wiring HITACHI Inspire the Next Electrical wiring Service Manual 3 4 Wire size Power Source Cable Size Transmitting Cable Size Model Power Source Maximum Current A EN60 335 1 0 MLFC O EN60 335 1 0 Shielded Twist Pair Cable RAS 8FSN2 12 2 5 mm 2 0 mm RAS 10FSN2 15 2 5 mm 2 0 mm RAS 12FSN2 20 4mm 3 5 mm RAS 14FSN2 22 4mm 3 5 mm RAS 16FSN2 25 4mm 3 5 mm RAS 18FSN2 29 6 mm 5 5 mm RAS 20FSN2 34 10 mm 5 5 mm RAS 22FSN2 39 10 mm 8mm RAS 24FSN2 43 8mm RAS 26FSN2 44 14 mm RAS 28FSN2 3 380 415V 50Hz 48 14 mm 0 75mm 0 75mm RAS 30FSN2 51 14 mm RAS 32FSN2 54 14 mm RAS 34FSN2 58 14 mm RAS 36FSN2 62 14 mm RAS 38FSN2 67 14 mm RAS 40FSN2 74
336. y displayed on the set temperature section The unit number and the alarm code are displayed on the display of the outdoor unit PCB1 This alarm code is displayed when the high pressure sensor voltage decreases lower than 0 1V or increases higher than 4 9V during the operation Is the connection CN7 of the outdoor unit PCB1 bad PCB1 Control PCB in Outdoor Unit PCB Indoor unit PCB Yes Connect it correctly m Is 12 VDC applied across 1 and 3 of the connector CN7 of the outdoor unit PCB1 No Faulty PCB1 Yes Is the voltage under 0 1 VDC or over 4 9 VDC across 2 and 3 of the connector CN7 of the outdoor unit PCB1 Faulty PCB1 Clogged check joint Replace the check joint No Abnormal operation of high pressure sensor Action Phenomenon Cause Check item Turn OFF Main Switch Fault Check that the output voltage is Replace the pressure sensor if correct faulty Faulty high pressure sensor Incorrect connection Check the connections Repair the wiring and the connections Faulty PCB1 Replace PCB1 and check the operation Replace PCB1 if faulty Indicated pressure value is excessively high or low Malfunction of the pressure sensor due to a faulty check joint Check the check joint for clogging Replace the check joint SMGB0049 rev 2 08 2010 137 T
337. you should arrange the facility as follows so that the refrigerant concentration will be bellow 0 3 kg m 1 Provide a shutterless opening that will allow the fresh air to circulate into the room 2 Provide a doorless opening with a size of 0 1596 or more to the floor area 3 Provide a ventilator which must be linked with a gas leak detector with a ventilating capacity of 0 4m min or more per Japanese Refrigeration Ton compressor displacement m h 5 7 of the air conditioning system utilizing refrigerant R410A O U model Ton RAS 8 12FSN2 4 11 RAS 14 16FSN2 6 16 RAS 18 20FSN2 8 21 RAS 22 24FSN2 9 32 RAS 26 28FSN2 10 43 RAS 30 36FSN2 12 48 RAS 38 42FSN2 15 64 RAS 44 48FSN2 16 75 4 Pay a special attention to the place such as a basement and others where the refrigerant may stay because the refrigerant is heavier than the air In case of KHK S 0010 this value should be decided according to the each country s regulation such as 1505149 and EN 378 SMGB0049 rev 2 08 2010 267 Caution with the refrigerant leakage Field work instruction HITACHI Inspire the Next Service Manual Example Room R kg V m Cc kg m Countermeasure System A Outdoor unit System B Outdoor unit A 50 300 0 17 z System A anp Sy

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