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HITACHI UTOPIA SERIES INVERTER-DRIVEN SPLIT

1. TF Inlet Outlet Liquid Gas RCS g 5 5 E 3 OV pS ae A pa CN20 r l Connector b for 240V CN21 ro Conector____ Rel PCB _ tor220 TB E PCNI te Fr 2 3 ONT 7 P 7 7 7 7 7 CP PFor Communication THM 1 THM 2 THM3 TAMA4 THM 5 AZ 2 Indoor Outdoor INPUT OUTPUT1 OUTPUT2 l B t iehEor RCS PC P1HE CN3 CN7 CN8 TP HA Fr ET ET l n m M a CN2 dd bed fas Lo beaks OLED1 TB OLED2 T pE oLED3 we bp i 1 1 Rsw Tr Ne Sol CN12 i ak 77 DSW3 E CNT 020 ojal for RCS ro 22 40V Pee YH D 4 DSWS al PC 2H2 380 415V g 8 El ra Bore GSM i 9 D pa 4 DSW6 Eel TB EF Y 2 DSW7 CN13 ui ES eg N on te 2 ow sowz y PCN2LLPCN8 pcNtoL LL
2. TF INLET OUTLET LIQUID GAS RCS 9 In case of RCI 1 5 2 0 FSG2E IS dag 4 4 x gt Bes ie PCN2 PCN8 Peno _ Poni CN20n Connector 12 f 4 e 4 f 3 e s for 240V CN21 FA j Th E Connector _ gt 44 l CB _ for 220V CN22 CN22 Pon Al o i 7 om i a 7 7 m 7 oe sisas ap For Communication THM 1 THM 2 THM 3 THM 4 THM 5 Indoor Outdoor INPUT OUTPUT1 OUTPUT2 For RCS PC P1HE ONS ONT NS PHA mJ CA ROM 0 n O RA oLEDI ere E B OLED2 i 1 oi oLEDS Electrical Control Box for Indoor Unit 2 Hd 4 1 y KO Rsw F NO 5 CN12 ye Y E K 27 DSW3 BJD ga CA Po X 7 b3 O al PREP bg ee a El ain SP PE 22040 a 4 YH pl 50 Switch SPER 220v ry HTH 7 DSW6 Eel ek 380 415V sole Gai FFI d 2 DSW7 CM3 B TZAZ E 5 PCNA ou Pon E gon i PON6L_ PONS po y 731 a 7 TE i Pye Pye at T E 5 o h i N Pu 7 E Bs uw A a wey wey a AR E C N u E y X I Main A 220V 50Hz Alo as Switch 2201 50 3 3s CN27 _ ten26 Al aw CN22 cn23 cna4 esse ge
3. Direct Current Measuring Position Measuring Range DC1000V 1 If capacitor has high voltage perform the high voltage discharge work refer to item 1 3 3 2 Checking procedures of ISPM is indicated in item 1 3 3 1526 HITACHI TROUBLESHOOTING Decrease of Discharge Gas Superheat RUN light flickers and ALARM is indicated on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB In the case that the discharge gas superheat less than 10 deg at the top of the compressor is maintained for one hour the alarm code is indicated Is the thermistor on No top of compressor gt Faulty Thermistor 2 good See page 1 35 for the Vy Yes thermistor resistance Is the thermistor No installed correctly Install it correctly on the compressor SN Yes Is it at cooling or heating mode when the alarm has occurred 7 Cooling Cooling Operation Check the high pressure Check the high pressure and compressor discharge and compressor discharge gas temperature and gas temperature and calculate superheat value calculate superheat value by outdoor unit PCB by outdoor u
4. of ISPM and the side of the tester to N terminal of rel ISPM If the resistance is more than 90 kQ it is f a normal aul N er m By touching the side of the tester to the RB terminal at 55 O a of ISPM and the side of the tester to N terminal of re fe a agr T ISPM If the resistance is more than 90 KQ it is ne ote a gt 2000 normal gt Y nba E LS a 999999 aaa a s oo g HITACHI i TROUBLESHOOTING 3 Checking Procedures ACT Module for 5HP only Outer Appearance and Internal Circuit of ACT Module Remove all the terminals of the ACT module before check If items a to f are performed and the results are satisfactory the ACT module is normal Measure it under 1 kQ range of a tester Do not use a digital tester a Check the mounted part is broken or not by visual check b By touching the side of the tester to the L2 terminal N of ACT module and the side of the tester to the P terminal of ACT module measure the resistance If all the resistances are greater than 100 KQ it is normal c By touching the side of the tester to the L2 terminal of ACT module and the side of the tester to the P terminal of ACT module measure the re
5. TF sad RCS Connector Ta Inlet Outlet Liquid Gas en AL E Conector OV Yor 2200 oo Be Sa Pa f J 1 CN20 b 5 Q aM y PCB 1B i PpS PRS EON a as ieee E R PoR For Communication THM 1 THM 2 THM 3 THM 4 THM5 AQ da Indoor Outdoor 2o ial For RCS PC P1HE NS O CNB P A CN2 ed Fas Fes bA 238 oLEDI TB OLED2 u E OLEDS Mai Sts wt fi y O Switch Noo PSH RSW o oO ee 4 DSW3 E X A 020 m Foon WO ows pt BR 220Vr 240V 3 HAHA id Ez se s ia 4 E 7 0Sw6 3 229 380 415V 50Hz 3 N EFI f e 2 DSW7 CN13 IES Esp pen2 Peng pento LL Pcn6 _ Pens Penal CNM NTT Main a era E a ea Li B45 162 ba di d e3488 283382 Switch n Mp E ml TL E O 111 E X by tn pS i 220V 50Hz onze 3B Ey 201 ii z FEEFEE M _ Ae EEE CN235 ES we by 126 Tl bat MV Ue We O a 49FE i 0 Electrical Control Box of Indoor Unit PCB Sockets location CN1 CN17 N14 CN7 CNS PCNS PCN1 PCN6 PON PCN11 PCN8 PCN10 FET Tape Control me YH2 YS2H YME YLO YSL
6. ELECTRICAL WIRING DIAGRAMS 7 1 7 10 ELECTRICAL WIRING DIAGRAM FOR MODELS RAS 5HVRG Connector for 220V Evaporator Discharge 1B 240V TF1 in ambient PIPe Gas 1 S PO 1 Connector for 240V pre THM7 THM8 THM9 i tl ra Te N 99 j AP Ea cnz LONI i CH EINES 1 ik er FR INe di 4 J0Sw1 6 JOSW2 4 DSW3 L11 N1 DSW5 220 240 220V 1 NF1 50 60Hz ACT 5 i 4 A H DeL E za A NIN Clay N20 ra 2 11 CN204 PO PCN202 CN202 poto obese sera j Electrical Control Box OF1 2 A MV l zx a Cyr IA OF2 TR EFI Tes RVR ACT ec z el
7. HITACHI tar TROUBLESHOOTING Alarm AY 1 Incorrect Capacity Setting or Combined Capacity Code HA 1 between Indoor Units and Outdoor Unit O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the total indoor unit capacity is not equal to the combined outdoor unit capacity Is DSW3 on the outdoor unit PCB1 set correctly No gt Set the capacity for PCB1 Is DSW3 on the indoor unit PCB set correctly In Set the capacity for PCB J Yes Total capacity of the indoor unit s is wrong Check combination A Incorrect Capacity Setting of Indoor Unit of indoor units and Correctly set dip switch capacity setting on PCB DSWS3 f Check capacity setting Correctly set dip switch Incorrect Capacity Setting of Outdoor Unit on outdoor unit PCB DSW3 Check outdoor unit Total Indoor Unit Capacity Connected to the model by calculating Ensure that total indoor unit capacity is 100 Outdoor Unit is Beyond Permissible Range total indoor units capacity NOTE In case of H LINK system this alarm code is indicated when DSW4 of outdoor unit PCB and DSW5 of indoor unit PCB are incorrectly set In this case set correctly DSW4 and DSWS5 after turning off mai
8. Restart operation Yes The ISPM is normal Is the compressor current larger than activation current No Is discharge pressure high Smaller than activation current Check pressure and refrigeration cycle 14 54 Check for clogging of the heat exchanger Check the fan motor Replace the ISPM Is the fixing screw Abnormal of ISPM loosen A gt Connect it correctly Normal The ISPM is faulty Replace it 1 Before replacing or the checking of inverter components refer to item 1 3 3 regarding electrical discharge i HITACHI TROUBLESHOOTING Alam gt Code AN Activating Protection Against Instantaneous Overcurrent of Inverter 2 O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the any alarm code of 51 52 53 and 54 occurs 3 times including 3 in 30 minutes Retry operation is performed up to the occurrence of 2 times Turn off power and disconnect U V W Conditions Inverter current with 150 of the rated current from compressor terminals No Yes Restart operation Does it trip soon Cc Turn ON 1 of DSW1 No It trips on ISPM and restart immediately Does it trip Yes It trips No
9. HITACHI UTOPIA SERIES INVERTER DRIVEN SPLIT SYSTEM HEAT PUMP AIR CONDITIONERS DC Inverter UTOPIA for Europe SERVICE MANUAL Models Indoor Units e In the Ceiling Type RPI 2 5HRG RPI 4 0HRG RPI 3 0HRG RPI 5 0HRG 4 Way Cassette Type RCI 2 5HRG RCI 4 0HRG RCI 3 0HRG RCI 5 0HRG 2 Way Cassette Type RCD 2 5HRG RCD 4 0HRG RCD 3 0HRG RCD 5 0HRG e Ceiling Type RPC 2 5HRG RPC 4 0HRG RPC 3 0HRG RPC 5 0HRG Outdoor Units RAS 3HVRG RAS 4HVRG RAS 5HVRG gt o E S 3 o h o O S 3 HITACHI Inspire the Next P5413554 CONTENTS No Page 1 TROUBLESHOOTING cirerer tad i 1 1 Tet E csesceess acs sateesdceceaeate vetee oacecnanedeuazecnte tad aadeac2ee toeeemeends ER EE a ER Eaa 1 1 1 1 1 Rotary Switch and Dip Switch Setting ccccooocooccoccnccnnonononnnnnnncnonnnnnononnncnnnnnnnnnnnnnncnnnnnnnnnnnnnns 1 1 1 1 2 Checking of Electrical Wiring ccccceecceeeeeceeeeeeceeeeeeeeeeeeeeeeeeeecaeeeseeaeeeeeeaeeeeeseeeeeeeueeeeneeeeees 1 5 1 13 Checking by 7 Segment Display ccccccccceeeecceeeeeeeeeeeeeceeeeeaeeeeeeeeeeseceeeeseceeeeeseseeeeeeeteeeees 1 6 1 14 Failure of Power Supply to Indoor Unit and Remote Control Switch oooooonnoccconncccccnncccccnonacccnnnnns 1 7 1 1 5 Abnormal Transmission between Remote Control Switch and Indoor Unit oooooconocccnnnncccnnnncccno 1 8 1 1 6 Abnormalities Of Devices sssrinin sonnan ai
10. O 2JOSW5 PSWT P CNS o 10 20 30 405 Electrical Control Box E A ESEESE SERA EN 616263 6162635455 0102030405 E CN206 CN203 CN204 PCN202 CN202 1 030201 lo50 40 30201 3 ma PCB1 NF1 oar e cn NF4 Ld PLANE A PLANE B Mark Name CA Capacitor CB Capacitor CMC Contactor for Compressor Motor DCL Reactor DSW Test Run DSW2 Optional Function Setting DSW3 Unit Capacity Code DSWa Refrigerant cycle N DSWs Transmission setting EF1 Fuse ISPM Inverter System Power Module MC Motor for Compressor MOFA Motor for Outdoor Fan MV Micro Computer Control Expansion Valve NF 4 6 Noise Filter Electrical Control Box ISPM a PLANE C Mark Name PCB1 Capacitor PSC Pressure Switch for Control PSH High Pressure Switch for Protection PSW Push Switch on PCB1 PSW2 Push Switch on PCB2 PSW3 Push Switch on PCB3 RS Resistor for Starting RVR Reversing Valve Relay TB1 Terminal Board TF1 Transformer THM Ambient Air Thermistor THMs Evaporator Pipe Thermistor THMg Dsicharge Gas Thermistor ZNR Surge absorber
11. Is there any cause of instantaneous voltage decrease No E gt Check the compressor Check the power source capacity and wiring It trips after a certain period Replace the ISPM 2 It trips occasionally Is the compressor running current as same as rated current Page 1 46 Yes E compressor Faulty Check the ISPM 1 gt O dize X y Good No Input currents out of balance E eck the power supply R 3 Yes Input currents nearly equal 3 Replace the ISPM of single phase nearly TS 27 equal 3 No Is the supply voltage 220V 240V 10 os No Is it 170V or more Check the capacity during operation and wiring of the 3 power source vos Is it 170V more during operation by operation of apparatus Yes No Replace the ISPM 2 1 Regarding the checking method for the ISPM refer to item 1 3 3 2 2 Before replacing the ISPM refer to item 1 3 3 1 regarding electrical discharge HITACHI 1a TROUBLESHOOTING Alam 1 Protection Activation of ISPM Code _f _f O RUN light flickers and ALARM is indicated on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB ISPM have detecting function of abnormality This alarm is indicated when the any alarm code of 51 52 5
12. Code IT Air Outlet Thermistor O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 0 24 KQ or cut greater than 840 kQ during the cooling or heating operation No Is the thermistor connected E _Comecti to THM2 of PCB Connecti Yes l f THM2 da s resistance o A between 0 24 and 840kQ gt Faulty Thermistor dl Yes Refer to page 1 30 for ir outiet thermistor resistance Thermistor In Case of 4 Way Cassette Type Faulty PCB Acti Faulty Air Outlet Thermistor Repair wiring and Incorrect Connection Check wiring to PCB Replace PCB and Faulty PCB Replace PCB if faulty Alarm 7 Abnormality of Thermistor for Indoor Unit Heat Exchanger Liquid Code Refrigerant Pipe Temperature Freeze Protection Thermistor O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 0 24 KQ or cut greater than 840 kQ during the cooling operation or heat
13. Protection Fault Check resistance Fae ta termistor Thermistor of y Indoor Unit Evaporating sd Thermistor of Check wiring to PCB Eat dl and Outdoor Unit Faulty PCB Replace PCB and A Outdoor Unit Indoor Unit Replace PCB if faulty me Check stop valve Fully open stop valve Check for clogging Remove clogging Check connecting Faulty or Malfunction of ae ad goung Replace coil Excessively Expansion Valve i Low Suction ee kdisch Pressure ec Iscnarge gas Replace thermistor in Vacuum ES L Ronaso memnsior de Check ae orde state of ae orde Reatach thermistor thermistor gas thermistor Check each al refrigerant after NFS pressure vacuum al Refrigerant Leakage Correctly charge Check gas leakage part refrigerant after repairing gas leakage da HITACHI Recharge refrigerant TROUBLESHOOTING Alarm J f Code 7 1 Abnormality of Current Transformer OA Detection O RUN light flickers and ALARM is indicated on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the current transformer is abnormal 0A detection and its state occurs more than 3 times in 30 minutes Condition of Activation When the frequency of compressor is maintained at 15 to 18Hz after compressor is started one of the absolute value of
14. TROUBLESHOOTING 1 1 6 Abnormalities of Devices rum of i swe ti Check for filter cheer cogs Remove Remove cioggro Insufficient Air Flow to ES for any obstacles Indoor Unit at inlet or outlet of Remove ias obstacles Heat ES unit Exchanger Check indoor an speed indoor fan Check indoor an speed Replace tan motor Replace tan motor motor Excessively High Air Excessively Temp to High Indoor Unit Discharge Heat Pressure Exchanger a Check expansion valve Correctly charge Refrigerant opening refrigerant Non Condensate Gas in Ref Cycle Clogging of Discharge Check for clogging Remove clogging Pr Piping Check temp difference Malfunction or Internal Leakage of 4 Way Valve ote ee outlet Replace 4 way valve i Check temp difference eel al Valve between inlet and outlet Replace check valve of check valve Excessively ae Check temp difference High Suction between inlet and outlet Leakage of Pressure 4 Way Valve of 4 way valve f Check for expansion Replace failed e al ee A valve of indoor unit in expansion valve of the same system indoor unit Check whether or not Remove cause of short circuited air exists short circuited air Insufficient Heating Operation Check each temp Recharge refrigerant and pressure after vacuum pumping Replace 4 way valve HITACHI Iie TROUBLESHOOTING 1 1 6 Abnormalities of Devices E Operation wi
15. If the stoppage of the unit is caused by cooling overload or heating overload the alarm code 41 or 42 is indicated This alarm is indicated when one of safety devices is activated during compressor running No Is the voltage No between 1 3 of PCN9 220V or 240V during Y52C ON Yes Does CMC ON when starting Is the protective device still operating No Faulty PCB1 Yes lt No Yes Does CMC turn ON for more than SSS gt Faulty PCB1 3 seconds Yes E No Faulty Faulty CMC Is the A contact of CMC activated Good Normal PCB1 y Check activation of the following safety devices Remove the cause after checking PSH 3 3MPa 33 kgf cm2G Check the coil for CMC HITACHI Tg TROUBLESHOOTING Action Clogging of Heat Exchanger Remove clogging air filter Insufficient Air Flow to Heat Exchanger Check for any obstacles Outdoor Heat Exchanger HL at niet or outlet of Remove obstacles or Indoor Heat Exchanger heat exchanger during Heating Operation arene eck the service f Check for speed Outdoor Fan Cooling o fan motor Indoor Fan Heating y Activation of Calculate heat load Reduce heat load or Switch due to Excessively Check for hot air near High Discharge me Make good circulation Dieser Excessively High Temp the ceiling Heating dl Air to Indoor Unit Heat Exchanger Check for short Remove circuited air Heating sh
16. 0A Detection When the frequency is 15 to 18Hz after starting Cause of Abnormality Failure of Current Sensor Failure of ISPM Failure of Compressor Disconnected Wiring Protection Function Overcurrent Protection for Inverter Rated Current x 150 Rated Current x 105 20us 30s Short Circuit Trip of Arm Instantaneous Overcurrent Trip Instantaneous Overcurrent Trip Electronic Thermal Trip Condition is maintained longer than 30 seconds or accumulated longer than 3 minutes during 10 minutes sampling time Protection of ISPM ISPM 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 Temperature is measured by internal thermistor increases excessively Control voltage decreases excessively 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 Decrease The unit is stopped when the ISPM temperature is higher than 100 C Earth Detection The unit is stopped when the compressor is earthing HITACHI Internal Protection of ISPM MAIN PARTS 3 1 2 Arrangement of Inverter Power Unit RAS 3HVRG and RAS 4HVRG RAS 5HVRG LED201 Red Magnetic Contactor Power Plate Noise Filter Reactor RA ISPM HS17A1F06 3HP and 4HP HF30A1F06 5HP ACT Modu
17. PSW on the PCB1 in the outdoor unit operation conditions and each part of refrigeration cycle can be checked 7 Segment PSW O To start checking press the PSW2 switch Check PSW3 PSW2 for more than 3 seconds i I i lt j gt O To proceed checking press the PSW2 switch y 4 i j O To proceed reversely press the PSW3 switch 1 Backward Forward 0 To cancel this checking press the PSW2 SEGI PSW2 PSW3 switch for more than 3 seconds Y52C Tt Pho Pt te FAN2 3H2 Indicates the last alarm code in the cause of The Latest Alarm Code n nes 3 Cause of Stoppage at ppag compressor stoppage Outdoor Unit Running Frequency of Ve Inverter Compressor ret 1 5 Request Frequency from I Indoor Unit I e Outdoor Air Flow Ratio En In case that air flow ratio is higher PSW3 PSw2 than 100 two digits flicker lt gt Outdoor Unit Expansion Valve Opening gt In case that air flow ratio is higher PSW3 PSW2 than 100 two digits flicker 1 In case that frequency is higher than 100Hz two digits flicker 1 In case that frequency is higher than 100Hz two digits flicker 00 Open Circuited 27 Short Circuited Flicker In case that temperature is higher than 100 C two digits flicker u 19 Open Circuited Evaporator E g Temperature at Heating E 27 a id lt gt 1 The pole of comp is four i
18. Ri is a a pS A A ac CN205351 Connector io 2 or CN21 17 7 Conector _ 744 PCB for 220 E 0 1 fr 1 fr 1 Fr Jl fr i fr 1 ir Jl B ae ee A ba 56 ba 56 da K 123 For Communication THM 1 THM2 THM 3 THM 4 T5 of A 39 Indoor Outdoor L 4 toa For RCS PC P1H ous CNZ_ CNS TP HA ona fi Tie to te OR oLEDI TB OLED2 a ERI OLED3 1 TE a A y O RSW g So Mo ese 4 a CN12 t 0 794 Pl r ae 4 DSW3 4 Main I 4 DSWS e S Switch 220V 240V pray ae SP PE an 4 4 DSW6 pe BS e 380 415V loa SOHz 3 N FFI i 2 DSW7 CN13 23 TB 1 32m PCN2 PONB _ PCN10 PCN11 PCN6 PCNS _ PCN3 CN11 CNI7 cl A 1 on A a Ba r on a Lat a y eu bee bee MNAL bh es bs pestos Sessa bs NO L L E as dl n gt CE3 X la l In ex 220V 50Hz Main TEN CN24 m CN25 pa Switch 220V 50Hz CN22 CN25 f Ei ai CN26 CN25 l EEN B89 8 8 i H2 EEEE WHP CN24 P CN25 P T oT Bey Wi me JCA AOS MA 345 CE4 L 49FE ne om EB Sackets location Electrical Control Box of Indoor Uni for 2 0 2 5 and 3 0 HP CN1 CN17 CN14 CN7 CNB PCN5 PCN1 PCN6 PCN3 PCN11 PCNB PCN10 PCB TF YSLO YH LEDI TB CA O Electrical Control Box of Indoor Uni PCN2 for 4 0 and 5 0 HP EFR1 eno PCB g gt EFS1 5 a CNi2 CN13 SSW CN10 CN11 CNS THMS THM3 THM1 i TF cal NOTE All the field wiring equipment must comply with local codes Mark Name Mark Name CA Capacitor for Indoor Fan SSW Slide Switch CN 21 26 Connector TB Terminal Board DSWa Unit Capacity Code TF Tr
19. Switch The unit No and unit code are as below regardless of the indoor unit Unit No 00 Cycle System 00 Unit Code E 00 No Is wiring among indoor E_x _ aEsx Repair the wiring among units right indoor units Yes JP4 O Turn off the main power switch and cut the wire JP4 at remote control switch then turn on the main power switch again Acti HITACHI i TROUBLESHOOTING Alarm fT J Code D D Compressor Protection This alarm code appears when one of the following alarms occurs three times within 6 hours which may result in serious compressor damages if the outdoor unit is continuously operated without removing the cause Alarm Code Content of Abnormality 02 Tripping of Protection Device in Outdoor Unit 07 Decrease in Discharge Gas Superheat 08 Increase in Discharge Gas Temperature 41 Cooling Overload 42 Heating Overload 47 Low Pressure Decrease Protection Activating These alarms are able to be checked by the CHECK Mode 1 Follow the action indicated in each alarm chart These alarms are cleared only by turning OFF the main power switch to the system However careful attention is required before starting since there is a possibility which will result in serious damages to the compressors 1 92 HITACHI TROUBLESHOOTING 1 2 3 Troubleshooting in Check Mode by Remote Control Switch HITACHI PC P1H O Use the remote control CHECK switch in the following cases 1 When the RUN lam
20. THMe THMa THMa THMs ae 4 joes 1 PCN7Z YHe LLAR 302 EFRI foes ENE l ME N MP ll EFS a a N pb se E CN3 CN4 CN7 CN8 l E 2l l l PER i l 202 l Field Connection PC P1H Spa Operating ITI Y CAL Line DC5V Electrical Control Box for Indoor Unit Printed Circuit Board PCB PCBe PCBa Cas TF S Pena COM Cow BO PCN203 PCN PC PCBe Z Cni AB PCN201 301 302 a EFS1 PCB3 S F RSW PCN202 5 amO Lo pasa Bv SW o Dswd NI3 PCN204 x CNle TB PCB SE DSW3 la EN 2 WHA EMN 201 A o Pe TMm o Service Connector for Drain Discharge Mechanism NOTE All the field wiring equipment must comply with local codes Mark Name Mark Name CA Capacitor for Indoor Fan PCB1 Printed Circuit Board CN 21 27 Connector PCB2 Printed Circuit Board DSW3 Unit Capacity Code PCB3 Printed Circuit Board DSWs Refrigerant Cycle No RSW Indoor Unit N Settings DSWe Unit Code PWM Pulse width Modulation DSW7 Fuse Recover Remote Controller Selector TB Terminal Board 1 EFR1 Fuse TB2 Terminal Board 1 EFS1 Fuse TF Transformer EF1 Fuse THM Inlet Air Thermistor EF2 Fuse THM2 Outlet Air Thermistor FS Float Switch THM3 Liquid Pipe Thermistor ITI Internal Thermostat for Indoor Fan Motor THMs Gas Pipe Thermistor MD Motor for Drain Discharge Mechanism YH2 Relay on PCB MIF Motor for Indoor Fan Terminals MS Motor for Automatic Swing Louver xX Field Supplied MV Micro Computer Control Expansion Valve mos Field Witin
21. 2 In this troubleshooting procedure checking of the following part of the PCB s 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 In the case that this troubleshooting is performed in the system using the central station indication of the central station may change during this procedure However this is not abnormal HITACHI 138 TROUBLESHOOTING 1 3 2 Self Checking of Remote Control Switch Cases where CHECK switch is utilized 1 If the remote control switch readouts malfunction 2 For regular maintenance check Changing of LCD Indication Indicating sec of EEPROM sec depress the A following For 3 switches one 1 second simultaneously ul during changing LCD indication TEMP ed F ig CENTRAL a Turn ON the power source Simultaneously depress the following 3 switches During operation they can be depressed TEMP MODE The LCD indication changes as shown in the right figure After the LCD indication changes as shown in the right figure the RUN indicator flickers twice y The LCD indication changes as shown below Depress all the switches 13 switches one by one Every time the switch is depressed the number of the indication of A part in the figure below increases one by one NOTES 1 Any order of depressing Unless
22. C or less Faulty PCB1 2 Evaporating Temperature of Outdoor Unit 55 C or less If exceeding the above value repair it 140 HITACHI TROUBLESHOOTING Clogging of Heat i fot Remove dust Insufficient Air Flow Remove dust to Heat Exchanger Soa of Outdoor Unit eck the service 2 Check for speed Outdoor Fan Cooling o fan motor Indoor Fan Heating auy Check for hot air near a the ceiling Make good circulation Excessively High Temp Air to Outdoor Unit aa o iia sie Heat Exchanger Check for other rr Measure discharge pressure Check continuity after decreasing of pressure Faulty High ae Pressure Insufficient Measure resistance Repair looseness Activation of Switch Contacting by tester Replace connector High Pressure Switch due to Excessively Incorrect A Pressure during Cooling bike P Ch i Operation eck cycle operating arge refrigeran Mixture of Non Condensable Check ambient temp Recharge refrigerant Gas in Refrigerant Cycle and pressure after vacuum pumping Clogging of Discharge Piping Check for clogging Remove clogging Check for clogging Remove clogging Check connecting Faulty or Malfunction of Check operating sound BR place coil Check e a gas Replace thermistor Check oe state of ERES Reatach termistor thermistor pay thermistor Liquid Line Gd Lne igo Vave ar Valve or Gas Line Gd Lne igo Vave se Valve are Check Check siop vales valves Fuly open siop va
23. CN11 CN1 or CN2 CL gt Plug PCN2 CN11 and for transformer is CN1 or CN2 correctly loosened No Outdoor Yes Unit Is LED2 yellow on PCB1 ON F Is LED3 yellow on PCB1 flickering Is the f f Xes s tne tuse tor PCB1 melted gt Replace fuse No D No on PCB flickerirg N 10 seconds PCB1 Outdoor Unit Printed Circuit Board Pa PCB1 Indoor Unit Printed Circuit Board Connect CN8 of PCB1 Faulty PCB1 Is PCB1 setting No Non pole operating gt Sct i correciy 2 Yes Is LED3 yellow SEDs Yes Yes dee FEA oNnevenitcn2 of gt Faulty PCB1 pec On PCB1 is removed No No gt Check other indoor units No Check wiring between dd oo se ce or units or fuse EF 1 for Indoor PCB1 Unit Is LED3 yellow on PCB1 flickering more than once in 10 seconds V Yes Does refrigerant system setting between DSW4 on PCB1 and DSW5 on PCB1 correspond Yes No allindoor unite AAA Faulty PCB1 Rye Faulty PCB1 1 In case that terminal resistance DSW5 1P is OFF when H Link Connection is performed Set the terminal resistance to ON when CN8 is removed Set the terminal resistance to OFF when CN8 is reconnected 2 PCB1 Factory Setting for Non Pole Transmitting No EE Sti correctly Setting Position Left Side New Transmission Side Short Circuited Transmission Wire Connecting CN18 Non Occupied HITACHI 123 TROUBLESHOOTI
24. Devices Indoor Heat Load is Greater Replace the unit with than Heating Capacity Calculate heat load Gas Leakage Correctly charge or Insufficient refrigerant after gas Refrigerant Measure superheat leakage check and Charge repairing Excessively Small Measure field supplied Diameter or piping Long Piping Check for clogging Remove clogging Check for connecting Failure or Malfunction Is there operation Valve Is thermistor on f Is thermistor installed correctly Correctly install it on compressor Use specified pipes Insufficient Clogging of Indoor Unit Outdoor Unit Strainer Heating Check temp difference Replace strainer for Operation Excessively Low between inlet and outlet outdoor unit or of strainer indoor unit Suction Pressure Clogging Check temp difference a of each part Remove clogging Is outdoor unit heat exchanger clogged Remove clogging Insufficient Is there any obstacles Air Flow at inlet or outlet of Remove obstacles through outdoor unit Outdoor Unit Heat Is service space for Secure sufficient Exchanger outdoor unit sufficient service space Check for speed of outdoor unit fan Replace fan motor Check for any Remove cause of Excessively Low Air Temp through Outdoor Unit Heat Exchanger short circuited air short circuited air to outdoor unit ada Check thermistor for Replace thermistor Completed defrosting for defrosting de HITACHI
25. Do not apply an excessive o not apply an excessive R A A voltage to this cable A i voltage to this cable Main Switch Main Switch Rated Voltage 12V Main Switch Main swen Rated Voltage 12V JE E g ELB ELB ELB ELB Outdoor Unit Indoor Unit Earth Wiring Power Source Cable Control Cable Power Source Cable Control Cable Pay an attention to the phase Shielded Twist Pair Cable 0 75m x 2 Pay an attention to the phase Shielded Twist Pair Cable 0 75m x 2 of power source when wiring This cable dose not have any polarity of power source when wiring This cable dose not have any polarity Do not apply an excessive voltage to this Do not apply an excessive voltage to this cable Rated Voltage 5V cable Rated Voltage 5V Wiring Connection for Single Type NOTE In case of the other wiring connection refer to Technical Catalogue II Table 1 1 Electrical Data and Recommended Wiring Breaker Size 1 Outdoor Unit Max Seminal Running Nominal omma Current i Sensitive Current Current A 220 240V 50H id E Z RAS 4HVRG 220V 60Hz RAS 5HVRG murc2sa murc2sa ELB Earthleakage Breaker Apply low sensibility type MLFC Flame Retardant Polyflex Wire NOTE Regarding the wiring or breakers follow to the local code HITACHI 13 TROUBLESHOOTING 1 1 3 Checking by 7 Segment Display 1 Simple Checking by 7 Segment Display 1 Turn on All Indoor Unit s All the Indoor Unit s Con
26. IPCNt1 Peng PONSL PONS NANI 7 330 5oHz o di eig esa 2 d La La edepo edsobl Main o 4 ati E E Switch N23 Electrical Box Connector 1 7 Electrical Control Box of Indoor Unit wey CAS t CN24 l me 33S883 83 CN22 FS EE A 33538388 me cane 49FE AP iY BW iy y N ir y 1232588788 PENYE ae PES PSE Es Fan Motor Connector Gey Fan Motor Connector HIGH STATIC PRESSURE Ni pa ADAPTER Facto ai Ta Y CN22 ADAPTER Factory Standard Static Pressure PCB Sockets location CN1 CN17 CN14 CN7 CNB PCNS PCN1 PCNG PCN3 PCN11 PCNB PCN10 Electrical Box Connector ouver Sensor EFT Tape Control Power Supply YH2 YS2H YME YLO YSLO YHI LED1 PCB O PCN2 EFR1 TF TB CN2 CA E D EFS1 z Sl 5 8 CL ica CN12 CN13 SSW CN10 CN11 CN3 THMS THM3 THM1 NOTE All the field wiring equipment must comply with local codes Mark Name Mark Name CA Capacitor for Indoor Fan TF Transformer CN 20 24 Connector_ TH Thermistor for Electric Heater DSWs Unit Capacity Code THM1_ Inlet Air Thermistor DSWs Refrigerant Cycle No THM2 Outlet Air Thermistor DSWs Unit Code THM3 Liquid Pipe Thermistor DSW7 Fuse Recover Remote Controller Selector THM5 Gas Pipe Thermistor EFR1 Fuse YH2 Relay for HI Fan Motor Tap EFS1 Fuse __ YH1 Relay for HI Fan Motor Tap FS Float Switch YME Relay for ME Fan Motor Tap ITI Internal Thermostat for Indoor Fan Motor YLO Relay for LO Fan Motor Tap MD Motor for Drain Discharge Mechanism YSLO Relay for SLO Fan Motor Tap MIF Moto
27. Line DC5V Field Connection Operai Electrical Control Box for Indoor Unit All the field wiring equipment must comply with local codes Mark Name CA Capacitor for Indoor Fan CN 21 27 Connector DSW3 Unit Capacity Code DSWs Refrigerant Cycle No DSWe Unit Code DSW7 Fuse Recover Remote Controller Selector EFR1 Fuse EFS1 Fuse EF1 Fuse EF2 Fuse FS Float Switch ITI Internal Thermostat for Indoor Fan Motor MD Motor for Drain Discharge Mechanism MIF Motor for Indoor Fan MS Motor for Automatic Swing Louver MV Micro Computer Control Expansion Valve NF Noise Filter LED1 3 Alarm Code Printed Circuit Board PCR CAe CAi pena Poni CON CEN EN o PCBe CNi ENE PCBs EFSI RSW 15 O Swi iw TB pe 1 ale Dsw4 ae 7 NF PCB Ss E Dsw3 Ly NAIL HA ENEN o Pene TANA o 182 T Service Connector for Drain Discharge Mechanism Mark Name PCB Printed Circuit Board PCB2 Printed Circuit Board PCB3 Printed Circuit Board RSW Indoor Unit N Settings PWM Puls
28. Outdoor Unit 1 Position of Thermistor Thermistor for Outdoor Ambient Temperature Thermistor for Discharge Gas Temperature el f i B Thermistor for b Evaporating i Temperature 2 Thermistor for Upper Part Temperature of Compressor 200 For Prevention of Discharge Gas Overheating a A thermistor for the upper part temperature 200 of the compressor is installed to prevent discharge gas from overheating If discharge gas temperature increases excessively lubricating oil deterioration occurs and lubricating properties deteriorate resulting in short compressor life b If discharge gas temperature increases excessively compressor temperature increases At the worst compressor motor 0 winding will be burnt out c When the upper part temperature of compressor increases during heating operation the unit is controlled according to the following method R25 200kQ B 3920k 100 Resistance Value of Thermistor kQ 25 30 100 132 150 Temperature C Resistance Characteristics of Thermistor for Discharge Gas Overheating Protection An electronic expansion valve of indoor units and high pressure refrigerant is returned to the compressor
29. P5413554 2003 Printed in Japan N ELECTRICAL WIRING DIAGRAMS 7 4 7 ELECTRICAL WIRING DIAGRAMS CONTENTS 7 ELECTRICAL WIRING DIAGRAMS 1 7 1 Electrical Wiring Diagram for models RCI 1 5 5 0FSG2Ei 2 7 2 Electrical Wiring Diagram for models RCD 1 5 3 0FSG2 3 7 3 Electrical Wiring Diagram for models RCD 4 0 5 0FSG2 4 7 4 Electrical Wiring Diagram for models RPC 2 0 5 0FSG2Ei 5 7 5 Electrical Wiring Diagram for models RPI 1 5FSG2Ei 6 7 6 Electrical Wiring Diagram for models RPI 2 0 5 0FSG2Ei 7 7 7 Electrical Wiring Diagram for models RPK 1 5 2 0FSG2M 8 7 8 Electrical Wiring Diagram for models RPF I 1 5 2 5FSG2Ei 8 7 9 Electrical Wiring Diagram for models RAS 3 4HVRG 9 7 10 Electrical Wiring Diagram for models RAS 5HVRG 11 72 ELECTRICAL WIRING DIAGRAMS 7 1 ELECTRICAL WIRING DIAGRAM FOR MODELS RCI 1 5 5 0FSG2Ei
30. PCB This alarm code is indicated when the contact between 1 and 2 of CN14 is not closed over 120 seconds during the cooling fan or heating operation Activation of Safety Device such as Float Switch FS or Incorrect Wiring Is DC12V applied between 2 of CN14 and GND Yes Faulty PCB RCI RCD RPI Types Other Types iA ih RH ARE lt H THM THM2 THMS THM4 THMS THMG O OOL Om OR L BACN12 amp CIL io sa C JE Jeno 12 CN13 CN14 YEIY THM THM2 THM3 THMA THM CN19 CN25 L mE CN N M HA NEY y tt O R24 Acti Clogging of High Drain Drainage Remove clogged Check drain pan foreign particles Level Up Slope Drain Piping o Check continuity when Replace float switch Activation of drain level is low if faulty Float Switch Faulty Faulty Measure resistance Repair looseness and Float Switch Contacting by tester replace connector r Check PCB by a Faulty Indoor Unit PCB self checking 1 Replace it if faulty 1 Refer to 1 3 1 Self Checking of PCBs using Remote Control Switch Lae HITACHI TROUBLESHOOTING Al E ls if a Activation of Safety Device in Outdoor Unit O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB
31. Re aaa R E E E EE Ea aea ER EE a R EEE 3 3 3 3 AULO LOUVEr Mechas cita E AE 3 5 3 3 1 AA O arae iaie eiS 3 5 3 3 2 2 Way Cassette Type as 3 6 A a a a a E 3 7 34 Scroll COMPE o E E 3 8 3 4 1 Reliable Mechanism for Low Vibration and Low Sound c ccceeeeeeeeeeeeeeeeeeeeeeeessueeeeeenaeeees 3 8 3 4 2 Principle Of Compression ccccccccceeeeeceeeeeeeeeeeeeeaeeeeecaeeeeseeaeeeeeeaeeeseceeeeeceeeeeseneeseseeeeseseeees 3 8 34 3 ES 0 1 eae ra A E ee Meron ae ee 3 8 O echo ccc cece cece ee cee wt eE cae eaves cu tn EE auc ces E E 3 9 3 5 1 Thermistor for Indoor Unit zesse aaae aa a ae haa ea a aeai e aE 3 9 3 5 2 Thermistor for Outdoor Unit zers a a a EAER E 3 10 3 07 Electronic EXPANSION Val Voies e ia 3 12 3 6 1 Electronic Expansion Valve for Outdoor Units ooooonoccccnnnccccnnoocccnonnocnconnnoncnonnnncononnnnnnnnnnrnnnnnnnnn 3 12 3 6 2 Electronic Expansion Valve for Indoor Units ccccecceeeeeeeeeeeeeceeeeeeeeeeeeceneeeeecneeeeeeseeeeeeneees 3 13 3 7 High Pressure Switch and Pressure Switch for Control c ccccseecceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeees 3 14 FIELD WORK INSTRUC TION cuida A a Eeee Er Ee AEEA EEEE 4 1 4 1 Overheating in Case of Using PC 5H s sess aieeaii aeaee R ASEA aE EEEa 4 1 A2 O E E 4 2 4 3 Select Guide of Drain Pipe for Indoor Unit 0 ccccccccecececeeeeeceeeeeceeeeeeaceeeeeeaeeeeecneeeeeeneeeseeseeeeneeees 4 3 4 4 Mamtenance VV OPK incre esa io
32. Rear Cover Valve Stay 4 Alle J A Rear Pipe Cover Rear Pipe Cover SU A Front Pipe Cover Front Pipe Cover Holder for Td Thermistor Td Thermistor Terminal Box Cover HITACHI 23 SERVICING TURN OFF all power source switches 6 Disconnect the suction pipe from the compressor 7 Disconnect the discharge pipe from the compressor by using two spanners 8 Remove the two 2 nuts fixing the compressor and remove the compressor by lifting a Check to ensure that the faston terminals of the wires is normal When a pulling force of 20N or more is required it is normal If abnormal replace the faston terminals with new ones Tool Phillips Screwdriver Charge Hose b Check to ensure that wires are firmly fixed Adjustable Wrench 2 Suction Pipe Discharge Pipe Double Spanners NOTES 1 To prevent contamination of the refrigerant with water or foreign particles do not expose open pipes to atmosphere for long periods If necessary seal pipe ends using caps or tape 2 Remove the caps for the new compressor just before replacing the compressor Seal suction and discharge pipe using tape when mounting to prevent the foreign particles barge in the compressor 3 Check to ensure each terminal Nos when connecting the compressor power wires If incorrectly connected the compressor will fail due to reverse rotation an HITACHI SERVICING TURN OFF all power source
33. Transmission Setting HE 1 2 OFF TROUBLESHOOTING 1 1 2 Checking of Electrical Wiring O Check to ensure that the terminal for power source wiring terminals L1 to L1 and N to N of each terminal board AC220V and intermediate wiring Operating Line terminals 1 to 1 and 2 to 2 of each terminal board DC5V between the indoor unit and the outdoor unit coincide correctly as figure below If not some component will be damaged O Check to ensure that the twist pair cable with shield 20 75mm2 are used for intermediate wiring to protect noise obstacle at total length of less than 1000m and size complied with local code Check to ensure that the wirings and the breakers are chosen correctly as shown in Table 1 1 O All the field wiring and equipment must comply with local codes Example for Electrical Wiring Connection Single Type RAS 3HVRG Remote RAS 5HVRG Remote RAS 4HVRG Control Switch Control Switch i L Option Option Remote Control Remote Control Switch Cable Switch Cable I i Field Supplied 1 area Field Supplied 220V 50Hz 220V 50Hz Shielded Twist Pair Cable 220V 50Hz 220V 50Hz Shielded Twist Pair Cable 240V 50Hz 240V 50Hz 0 75m x 2 240V 50Hz 240V 50Hz 0 75m x 2 220V 60Hz 220V 60Hz This cable dose not have 220V 60Hz 220V 60Hz This cable dose not have any polarity any polarity
34. aaaea aaa iia 1 9 WA MOUDIESMOOUNG POCOS cn ic 1 17 121 AlamCode Table scs a aa Ea aE E 1 17 1 2 2 Troubleshooting by Alarm Code ccccccccceeececeeeecceeeeeeeeeeeeaceeeeeaeeesecaeeseeceeeeeseseeeeeessaeeeeeeeeeees 1 18 1 2 3 Troubleshooting in Check Mode by Remote Control Switch cceceececeeeeeeeeeeeeeeeeeeeneeeeeees 1 53 1 2 4 Troubleshooting by 7 Segment Display cccccceeeecceeeeeeceeeeseeeeeeeseeeeeeecaeeeeeceeeeeeeseneeeeestseeees 1 59 1 2 5 Protection Control Code on 7 Segment Display cccccecceeeeeeeeeeeeeeceeeeeeeeeeeeeeeeeesseeeteeneees 1 61 12 0 Function OF EDS css sss eck we ks a ccs ce eat 1 62 1 3 Procedure of Checking Each Main Parts ccccccceeseeceeeeeeeeeeeeeeeeeeeenaeeeescaeeeeecaeessecneeeesseseessteess 1 64 1 3 1 Self Checking of PCBs using Remote Control Switch cccccccceeeeeeceeeeeeeeeeeeeeeeeeseneeeeesneeeees 1 64 1 3 2 Self Checking of Remote Control Switch 0 ccecccceeeecceeeeeeceeeeeeeeeeeeeeceeeeeeaeeeeeceaeeetesseeeeesenseeees 1 66 1 3 3 Procedure of Checking Other Main Parts ccccccecceecceeeeeceeeeeeeeeeeeseeeeeeeeeeeeeseeeeeseeneeeeeseneeeees 1 68 2 SERVICING enaere eevee Seve E rio EA cine iaa cana 2 1 241 Outdoor Units ti A A E abeane 2 1 2 1 1 Removing Service Cover cccccccccceeeccceeeeceeeeeneeeeeeaceeeseaaeeeeeeaaeeeeeeaeeeeeeaeeeeeeaeeeeeseaeeseseesesenaees 2 1 2 1 2 Removing Air Outlet Grille ss
35. according to the item 2 1 1 Removing Service Cover 2 Remove the three 3 screws fixing the electrical box and turn the power plate toward the front side NOTE Check to ensure that LED201 Red is OFF when turning the power plate i j Phillips Screwdriver Spanner RAS 3HVRG and 4HVRG RAS 5HVRG Magnetic Contactor Reactor Magnetic Contactor NOTES 1 Identify terminal Nos with the mark band Nos when reassembling If incorrectly connected malfunction or damage to the electrical parts will occur 2 When changing the PCB ensure to set all the dip switches to the same configuration as the original HITACHI ae SERVICING TURN OFF all power source switches 3 Disconnect all wires connecting to the ISPM O Disconnect CN201 CN202 PCN201 PCN202 Wire for Fan Motor O Disconnect CN203 CN204 CN206 CN101 SHVRG only O Disconnect RB N P P1 and R S U V W on the terminal board and the faston terminal TB3 of ISPM 4 Remove the four 4 screws fixing the ISPM NOTE Do not hold the PCB on the ISPM when removing the ISPM When handling the PCB take care of not to use excessive force as this will cause damage 5 Disconnect all wires connecting to the ACT module O Disconnect CN101 O Disconnect the faston terminal L1 L2 P N1 and of ACT module 6 Remove the two 2 screws fixing the ACT module NOTES 1 Do not remove the insulation part from the s
36. after 10 seconds It occurs more than 10 times in 30 minutes this alarm is indicated The abnormality occurs when the fan motor is stopped Restart operation y Yes This alarm is indicated due to Does the motor run HAS detected overcurrent by the contrary wind This is normal No Alarm code is not indicated Yes foreign matter Remove the foreign matter No Check to remove the connector CN14 and CN15 on PCB1 and CN203 CN204 CN201 CN202 PCN201 and PCN202 on ISPM or not Faulty lt Are the connectors abnormal gt the connectors abnormal lt Are the connectors abnormal gt __ gt _Connectitcorrectly Connect it correctly Good Replace the fan motor Restart operation Yes Does the motor run Tris is normal No Alarm code is not indicated Replace the PCB1 In the case that the fan motor does not run even the PCB1 is replaced replace ISPM 1 90 HITACHI TROUBLESHOOTING Alarm ll 7 Code JIT Incorrect Wiring Among Indoor Units This alarm code is indicated only when remote control switch PC 2H2 is used being connected to indoor unit This alarm occurs in the case of incorrect connection like that TL terminal is connected to Vc terminal as below when indoor units are wired 0 CN13 Blue CN12 Yellow CN13 Blue CN 12 Yellow Ve Ta TL Ve Ta TL Ve Ta TL Ve Ta TL O _ O O Incorrect Wiring Vc Ta TL Remote Remote Control Control Switch Yellow
37. al e rada 4 4 4 5 Service 8 Maintenance Record by 7 Segment Display oooooonoccconnocccnoccccconononcnonnnnncnnnnnnnnnnnnnnnnnnnnnnnns 4 5 4 6 Service amp Maintenance Record by Remote Control Switch ccceccceeeeeeeeeeeeeeeeeeeeeeessneeeteeseeeees 4 6 4 7 Service 8 Maintenance Record cccceeccceeeecceeeeeeceeeeeeeceeeeeaeeeeecaceeeeceaeeeesecaeeeeeeceeeeeeeueeeeeseeeeseneeees 4 7 1 TROUBLESHOOTING 1 1 Initial Troubleshooting 1 1 1 Rotary Switch and Dip Switch Setting 1 Indoor Unit TROUBLESHOOTING The PCB in the indoor unit is equipped with 3 or 4 types of dip switches and rotary switch Before testing unit set these dip switches according to the following instructions Unless these dip switches are set in the field the unit can not be operated Before setting dip switches firstly turn OFF power source and set the position of the dip switches If the switches are set without turning OFF the power source the switches can not function NOTE The WE mark indicates position of dip switches Figures show the setting before shipment lt RCI Models gt A Position of Dip Switches PCB for Indoor Unit B The PCB in the indoor unit is equipped with 3 types of dip switches and rotary switch Before testing unit set these dip switches according to the following instructions Unless these dip switches are set in the field the unit can not be operated a Unit No Setting RSW Setting
38. for DC fan motor Activated The voltage between both terminals of capacity C is 50 20V or greater Deactivated The voltage between both terminals of capacity C is 50 20V or smaller pe HITACHI TROUBLESHOOTING 2 Printed Circuit Board in Outdoor Unit PCB for Outdoor Unit AS 1 ELE LED1_LED3 ee Q Q m Lao la leal EEE EA E Dip Switches and LED Functions on Outdoor Unit Printed Circuit Boards Name of Internal Circuit Board Contents of Functions Controlling Board Power Source for PCB1 PCB1 Normal Condition Activated Abnormal Condition Deactivated This LED2 indicates the transmission state between the PCB1 and ISPM Normal Condition Flickering Abnormal Condition Activated or Deactivated This LED3 indicates the transmission state between the indoor unit and outdoor unit Normal Condition Flickering Abnormal Condition Activated or Deactivated This SEG1 indicate the following alarm protective safety device has tripped or checking items LED201 ee ig O JCOCJCOCJLOJLCOCJCOC RB PD N R S U Vv T w e LED Functions on Outdoor Unit ISPM Circuit Board LED Red This indicates the voltage between both terminal of capacitor 201 CB1 and CB2 for inverter part Activated The voltage between both terminals of capacitor CB is 50V 20V or greater Deactivated The voltage between both terminals of capacitor CB is 50V 20V or smaller HITACHI 163 TROUBL
39. is required Set the unit No of all indoor units respectively and serially by following setting position shown in the table below Numbering must start from 0 for every outdoor unit No 2 Unit Setting Position No 4 Unit No 5 Unit No 7 Unit Set by inserting slotted screwdriver into the groove Rotary Switch Setting REIS KOT S f R Kes Rotary Switch Setting b Capacity Code Setting DSW3 No 12 Unit No 13 Unit No 14 No 15 Unit No setting is required due to setting before shipment This switch is utilized for setting the capacity code which corresponds to the Horse Power of the indoor unit Setting Position HITACHI 1 1 TROUBLESHOOTING c Refrigerant Cycle No Setting DSW5 ON Setting is required Setting position before shipment is all OFF myama 1234 OFF d Fuse Recover DSW7 ON No Setting is required g Setting position before shipment is all OFF TS OFF ON In the case of applying high voltage to the terminal 1 2 of TB2 the fuse 0 5A on the PCB is cut 4 A g In such a case firstly correct the wiring to TB2 and then turn on No 1 pin lt RPI RCD and RPC Models gt A Position of Dip Switches PCB for Indoor Unit B The PCB in the indoor unit is equipped with 4 types of dip switches and rotary switch Before testing unit set these dip switches according to the following instructions Unless these dip
40. it 2 Fix the motor wires onto the motor clamp with a plastic tie to prevent them obstructing the propeller fans 3 Mounting Propeller Fan Insert the skidding protection part of fan boss in accordance with the cutting part of the motor shaft and fix the screw after exserting screw part of the shaft Tightening Torque of 8 0 N m 80kg cm 4 When connecting the motor wire check to ensure that the colors of the connectors on the PCB are matched with wires 5 Firmly fix the air outlet grille to the shroud os HITACHI SERVICING TURN OFF all power source switches 2 1 5 Removing Compressor 1 Remove the service cover according to the item 2 1 1 Removing Service Cover If the outdoor unit is installed close to a wall disconnect the refrigerant pipe and move the outdoor unit away from the wall 2 Collect the refrigerant from the check joint 3 Remove the valve stay 4 Open the soundproof cover of the compressor remove the terminal cover for the compressor and disconnect the wiring from the compressor terminals NOTE Check to ensure each terminal Nos when connecting the compressor power wires If incorrectly connected the compressor will fail due to reverse rotation 5 Remove the soundproof cover thermistor holder on the compressor and thermistor Tool Phillips Screwdriver Charge Hose Adjustable Wrench 2 RAS 3HVRG and 4HVRG RAS 5HVRG Upper Cover Rear Cover he Check Joint AN AOS KUN _
41. running current at each phase Phase U Phase U Phase V Phase V is less than 0 5A including 0 5A Restart operation Compressor stops gt Faulty ISPM and immediately nearly 18Hz replace ISPM 2 Compressor is not operated How is compressor operation when restarted P17 is appeared 1 y No J Yes No correct 2 Check ISPM J Yes Replace ISPM 1 P17 is shown at 7 segment on the outdoor unit PCB 2 Perform the high voltage discharge work by referring to 1 3 3 before checking and replacing the inverter parts HITACHI 143 TROUBLESHOOTING ee Activating Protection Against Instantaneous Overcurrent of Inverter 1 Code fl O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the any alarm code of 51 52 53 and 54 is activated 3 times including 3 in 30 minutes Retry operation is performed up to the occurrence of 2 times Conditions Inverter current with 105 of the rated current 1 runs continuously for 30 seconds or 2 runs intermittently and the accumulated time reaches up to 3 5 minutes in 10 minutes Is the cause of stoppage of troubleshooting by 7 segments display nou or 4 oi E gt Refer to next page
42. switches 2 1 6 Removing High Pressure Switch and Pressure Switch for Control 1 Remove the service cover according to the item 2 1 1 Removing Service Cover 2 Remove the nine 9 M5 screws fixing the rear cover and the five 5 M5 screws fixing the pipe rear cover Slide the rear cover and pipe cover downward 3 Collect the refrigerant from the check joint according to the item 2 1 5 Removing Compressor a Disconnect the fasten terminals b Remove the high pressure switch and pressure switch for control from the brazing part by a burner Tool Phillips Screwdriver Charge Hose pe Burner RAS 3HVRG and 4HVRG Upper Cover Electrical Box Screw Upper Cover M5 Q ty 9 Co Discharge Pipe 4 Pressure Switch Pressure 9 Switch for Control Brazing Part Front Pipe Cover Liquid Tank Pressure Switch for Control RAS 5HVRG Upper Cover Electrical Box Discharge Pipe Pressure Switch for Control Y Brazing Part High Pressure Switch Liquid Tank HITACHI ae SERVICING TURN OFF all power source switches 2 1 7 Removing Coil for Reversing Valve A DANGER Do not touch the electrical parts when LED201 Red on the ISPM is lit to prevent from an electrical shock 1 Remove the service cover according to the item 2 1 1 Removing Service Cover 2 O RAS 3HVRG and 4HVRG a Remove three 3 screws fixing the power
43. switches are set in the field the unit can not be operated a Unit No Setting RSW Setting is required Set the unit No of all indoor units respectively and serially by following setting position shown in the table below Numbering must start from 0 for every outdoor unit Setting Positi No 3 No 4 No 5 No 6 Shing FosIt n Unit Unit Unit Unit Set by inserting slotted Rotary LS SS screwdriver into the groove aa ey No 13 No 14 Unit Unit Rot 07 am set B Ea Setting KZ sy Next b Capacity Code Setting DSW3 No setting is required due to setting before shipment This switch is utilized for setting the capacity code which corresponds to the Horse Power of the indoor unit Setting Position a HITACHI TROUBLESHOOTING c Refrigerant Cycle No Setting DSW5 ON Setting is required Setting position before shipment is all OFF 1234 OFF d Unit Model Code Setting DSW6 No setting is required Setting the model code of the indoor unit RPI 2 0HRG L Model Code Model Code ON ON ON a RPI HRG Setting b RCD HRG Position c RPC HRG e DSW7 Factory Setting ON 12 OFF No 1 Pin Fuse Recover ON When fuse is cut turn No 1 Pin ON 4 A 1 2 OFF No 2 Pin Transmission Selection OFF Non Polarity 2 Wired PC P1H ON Polarity 3 Wired PC 2H2 f Transmission Selection SW1 Indication of SW1 A Japanese Letters E Ej E IH Polar
44. unit is stopped Control Switch and In this case stoppage is d1 05 cause and the alarm Indoor Unit NOTE 1 code 04 may be indicated NOTE 4 _ If transmission between the indoor unit and the outdoor unit is not performed during 3 minutes indoor units are stopped 18 alent Times In this case stoppage is d1 06 cause and the alarm on Inverter code 03 may be indicated NOTE 5 Inthe system 21 will be indicated at twin type confirm the stoppage cause of the other indoor unit Countable up to 99 Indication of Automatic Louver Condition Over 99 times 99 is always indicated NOTE 1 Ifa transmitting error continues for 30 seconds one is added to the occurrence times to next page HITACHI 1 99 TROUBLESHOOTING 1 56 Compressor mer TIH Indication Ol an a Pressure High x 0 1 MPa Suction Pressure Low x 0 01 MPa Control Information HH Operation a Frequency Hz Cindoor Unit Capacity Indication Unit Cindoor Unit Capacity Indication Indication 24 Indoor Unit Capacity Outdoor Unit Code EH Refrigerant Cycle Number 27 Refrigerant Cycle Number Expansion Expansion Opening Indication _ Indication Indoor Unit 28 Expansion Valve Opening Outdoor Unit 29 Expansion Valve pp MV1 Opening Outdoor Unit 30 Expansion Valve pp MV2 Opening Outdoor Unit 31 Expansion Valve RIA MVB Opening Estimated Electric Current Indication 32 Compressor Run
45. 0 i Ra ma OV ES CN20 6 5 2 CN21 l rB PCB T En Sa A l y MAA gt pet Rm A RH ma mo E 1 i ie 4 Bia PON T E do 7 hi 7 T 7 f 7 T 7 ld do THM THM 2 THM 3 THM 4 THN 5 ech aio rte dol ONS ON NS IP HA 1 CN2 bed bes Gee LA e Oli TB INPUT OUTPUT1 OUTPUT2 OLED2 ro 07 PiE 1 o 1122s i i ES D RSW es 4o 1050 cNi2 o x l a aera YK aay UN i ae DSW3 ihe 3 wire RCS tie A Owe Zw ee witcl pli L o ggasi G Yi el 3 wire RCS A 380 415V a7 AS be y Dwe bes PC 2H2 50Hz 3 N i ojal EFI fl y 2 DSW7 CN13 T a recy II O IA A Ce 1248 8 00633 3911 NE 853553 353 3438 e 34884 io 12 55 g YI we J l 3 ey e Y e3 L J U yy lu a Ph spa P Poe SABE Phat gt Main Te CA CN27 i 220V 50H2 ct E f Mai 78 65123 4 7201 50 CN22 K i i ii CN22 Hp MV Te 7 z BW 49FE Nat Printed Circuit Board PCB cu CN17 CN14 CN7 CNS PCNS PCNT PCN6 PCN3 _PCNTT PCNS PCNTO g EF NE ea aa PCB TF LEDI Louver Senenr Boho o DSW3 DSW5 DSWS CA LED3 E EFR1 E cn2 TP tema THM2 Y EFSI 5 E a0 5 CN NS Seq CNO CN cna mustama mami MIGH VOLTAGE NOTE All the field wiring equipment must comply with local codes Mark Name Remarks Mark Name Remarks CA Capacitor for Indoor Fan SSW Slide Switch CN 1 n Connectors TB Terminal Board DSW3 Unit Capacity Code On PCB THM1 Inlet Air Thermistor On PCB DSWs Refrigerant Cycle No On PCB THM2 Outlet Air Thermistor On PCB DSW6 Unit Models Code O
46. 3 and 54 occurs the abnormality 3 times in 30 minutes including 3 Retry operation is performed up to the occurrence of 2 times Conditions Abnormal Current to the ISPM such as Short Circuited or Grounded or Abnormal Temperature of the ISPM or Control Voltage Decrease Turn off power disconnect U V W from compressor Check the compressor If there is a short circuit terminals and restart Does the protecting function activate 3 I Yes Faulty Check the ISPM 1 2 Replace the ISPM Good Is the silicon grease coated securely between ISPM and between phase lines replace the compressor Apply the silicon grease between ISPM and fin fin Is the fixing screw of ISPM loosen securely 4 ya Is the h h f ar S Remove clogging outdoor unit clogged Remove clogging No Replace the ISPM 1 Before replacing the ISPM refer to item 1 3 3 1 regarding electrical discharge 2 Regarding the checking of the ISPM refer to item 1 3 3 2 3 Turn ON the No 1 switch of the dip switch DSW1 on ISPM when restarting with disconnecting the terminals of the compressor After troubleshooting turn OFF the No 1 switch of the dip switch DSW1 on ISPM 4 Silicone grease P22760 is available as a spare parts i HITACHI TROUBLESHOOTING e a R Activating Protection Against Temperature Increasing of Inverter Fin O RUN light flickers and ALARM is indicated on the remote control sw
47. 3Mpa compressor is stopped to protect the refrigerant cycle components 2 Pressure Switch for Control When the discharge pressure reaches 2 75MPa during heating operation gas by pass control or fan control are performed RAS 3HVRG and 4HVRG Electrical Box Upper Cover Discharge Pipe Liquid Tank High Pressure Switch Pressure S Switch for Control Brazing Part Pressure Switch for Control RAS 5HVRG Upper Cover Electrical Box Discharge Pipe Pressure Switch for Control Liquid Tank Brazing Part High Pressure Switch Sg HITACHI FIELD WORK INSTRUCTION 4 FIELD WORK INSTRUCTION 4 1 Overheating in Case of Using PC 5H Question and Answer for Field Work Example 1 Overheating in Case of Using PC 5H Phenomenon After test run indoor temperature increases more than 30 C even if the setting temperature is 20 C Cause Test running is performed from the outdoor unit the operation mode at the test running is memorized Countermeasure In such case perform the self checking and initialize the memory by following procedure 1 Depress A V High and Medium simultaneously 7 segment and LED will be lit Depress all the touch type switches one by one 7 segment indicates Ou Transmission check will be performed After 3 seconds 7 segment indicates 77 for Main Unit or 88 for Sub Unit
48. Current Decrease Voltage Increase Temperature Instantaneous Power Failure Detection Reset of Micro Computer for Inverter Earth Fault Detection for Compressor Only Starting Abnormal Power Source Phase Increase Input HITACHI rea TROUBLESHOOTING 1 2 6 Function of LEDs 1 Printed Circuit Board in Indoor Unit Following figure shows a separated board type PCB RCI Series RPI RCD and RPC Series PCB1 PCB2 ml 2 S CCEE LED4 1 J E S i oe E T D Len OLED4 E eles OCI S Zo E LED Functions on Indoor Unit Printed Circuit Board for Control Contents of Functions 1 LED1 This LED1 indicates the transmission state between Red the indoor unit and remote control switch Normal Condition Flickering Abnormal Condition Activated or Deactivated 2 LED3 This LED3 indicates the transmission state between Yellow the indoor unit and outdoor unit Normal Condition Flickering One Time Some Seconds Abnormal Condition Activated or Deactivated more than 30 seconds or Flickering 30 times 1 second LED4 This LED4 indicates the power supply 5V for Red micro computer Normal Condition Activated Abnormal Condition Deactivated E LED Functions on Indoor Unit Printed Circuit Boards for Power Supply PCB2 for RCI Series only Contents of Functions LED1 This indicates the voltage between terminals of capacity Red C1 on the PCB
49. ESHOOTING 1 3 Procedure of Checking Each Main Parts 1 3 1 Self Checking of PCBs using Remote Control Switch The following troubleshooting procedure is utilized for function test of PCBs in the indoor unit and outdoor unit RUN STOP HITACHI HIGH DNR AOT SET TEMP p Ia Y LEEI gl ere A bal balon MED Press tow N AG SS ses SRA TARA Stop Operation EA cet VENT H STRG 21174 T RUN CHECK RUN STOP O TEMP O Simultaneously depress MODE FAN SPEED two switches for 3 seconds PCB Check Mode CHEO O a SGL U A Indication of Unit No 0 ex Indi cation i Abnormality Open circuit Short circuit etc in circuit for Indication of Unit Number After 7 Seconds Operating Automatic PCB Check After Approx 5 sec Max 30 sec in Result case of transmission elie between indoor unit and outdoor unit Max 3 Types of Abnormalities indicated Intake Air Temp Thermistor Discharge Air Temp Thermistor Liquid Pipe Temp Thermistor Remote Thermistor Abnormality Gas Pipe Temp Thermistor Indoor Unit Transmission of Central Station oe EEPROM Zero Cross Input Failure Transmission of Indoor Unit during Remote Sensor Abnormality 1 E After 1 Seconds Abnormality 2 Transmission of Outdoor Unit ITO Input Failure PSH Input Failure Protection Signal Detection Circuit Phase Detection HHE a ee cae J Ou
50. Electronic Expansion Valve 3 6 1 Electronic Expansion Valve for Outdoor Units Pulse Signal T j Pulse Motor EJE Needle Specifications 30 C to 65 C 30 C to 60 C Operating Time of Coil less than 50 Drive Condition 83PPS Pulse Width at ON 36mm sec OFF 60mm sec 1 2 Phase Excitation Cea 460 10 at 20 C Wiring Diagram Drive Circuit and Activation Mode Wiring Diagram 5 Lp T H Drive _ gt DC12V Circuit Valve Close Open Activation ole HITACHI MAIN PARTS 3 6 2 Electronic Expansion Valve for Indoor Units Micro Computer Pulse Signal 2 Phase Permanent Magnetic Pulse Motor Pulse Motor Control 0 to 2 000 Pulse by 1 Pulse Refrigerant Flow Control Precise Control Specifications items Type Refrigerant Used Working Temperature Range Mounting Direction Drive Shaft in Vertical Direction Motor Upside and 90 in Four Direction Flow Direction Drive Method Rated Voltage Drive Condition 10002 250PPS Pulse Width Over 3mm 2 Phase Excitation ete oe 150 10 at 20 C Wiring Diagram Drive Circuit and Activation Mode Wiring Diagram Activation HITACHI 33 MAIN PARTS 3 7 High Pressure Switch and Pressure Switch for Control 1 High Pressure Switch for Protection When the discharge pressure reaches 3
51. HITACHI TROUBLESHOOTING Active Parts of Internal Circuit of ISPM for 3 and 4HP P1 PB U s Z aU If item i to m are performed and the results are satisfactory ISPM is normal Measure it under 1 KQ range of a tester 2 Do not use a digital tester J I i HI AA az A MM i Perform the item a to h j By touching the side of the tester to the RB terminal Je 8 5 of ISPM and the side of the tester to P terminal of Pa maan ISPM Ifthe resistance is more than 1 KQ it is normal RB eg onn anig 2000 J P N e ee TS 0 al o A l Ta HSA a k By touching the side of the tester to the RB terminal of ISPM and the side of the tester to P terminal of ISPM If the resistance is more than 100 KQ it is normal Nas I By touching the side of the tester to the RB terminal
52. I res TROUBLESHOOTING Alarm Activation of Protection Device for Indoor Fan Motor Code 7 RCI Model O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the following conditions occurs three times in 30 minutes Indoor fan rotates less than 70rpm for 5 seconds during operation Does the indoor When the cause is checked by this flow chart fan run confirm with the fan speed setting is Hi y Check the connector PCB1 CN1 CN19 PCN1 PCN7 as shown on the right PCB2 CN201 CN202 PCN201 PCN202 PCN203 N Faston Y y Insufficient voltage for PCB2 as DC 280V gt Faulty POB2 gt Replace PCB2 Is LED1 on PCB2 OFF y Is DC power supply for PCB2 correctly nea Yes Is LED4 on PCB1 OFF y Is DC power supply for PCB1 correctly VV Yes Is the voltage between Vcc15 No and GND1 of PCB2 15V 10 E gt Fauty Pos2 M Replace PcB2 Yes Faulty PCB1 Insufficient voltage for PCB1 Replace PCB1 Sj 551 E gt or Transformer or Transformer Is the voltage between VccO5 No FauttyPcg1 and GND ofPCB1 5V 5 Replace PCB1 gt or Transformer Is the voltage between Vcc12 or Transfo
53. NG Action Power Failure of No Power Supply ie voltage by Supply power aah Check for breakage Remove short circuit Short Circuit between Wires and replace fuse Short Circuited Wire Measure insulation Remove short circuit to Melted Fuse for to Ground resistance ground and replace fuse Power Source or Activation of Outdoor Unit Measure resistance Breaker Faulty Comp Motor between wires and insulation resistance Replace comp and use Measure resistance between wires and insulation resistance Faulty Outdoor Unit Fan Motor Short Circuit between Wires Short Circuit of Control Melted Fuse for Feil Control Circuit Circuit to Ground or Activation of Outdoor Unit Faulty Solenoid Coil for Breaker Magnetic Switch for Comp Motor Replace outdoor unit fan motor and fuse Remove short circuit and replace fuse Check for breakage of insulation Remove short circuit and replace fuse Measure insulation resistance Measure resistance of coil Replace magnetic switch and fuse i Measure resistance Failure of Outdoor Unit between Wires and Fan Motor insulation resistance Replace fan motor and fuse it Fee Disconnected O Uni Check continuity of Wires Insufficient wires Replacing wires repairing tightening screws and correct Contacting or Check for looseness Incorrect RN of connection screws Connection Power Source Wiring Check terminal Nos wiring for O
54. O YHI LED1 P C B o to Rw O Fep2 PCN2 DSW3 DWS5 DWS6 Ou EFR1 CN2 TP THM4 THM2 i E pes 5 EFS1 T B ee A CN12 CN13 SSW CN10 CN11 CN3 THMS THM3 THM1 High CA Mark Name Mark Name CA Capacitor for Indoor Fan TF Transformer CN 21 27 Connector TH Thermistor for Electric Heater DSW3 Unit Capacity Code THM1 Inlet Air Thermistor DSWs Refrigerant Cycle No THM2 Outlet Air Thermistor DSWe Unit Code THM3 Liquid Pipe Thermistor DSW7 Fuse Recover Remote Controller Selector THM5 Gas Pipe Thermistor EFR1 Fuse YH2 Relay for HI Fan Motor Tap EFS1 Fuse YH1 Relay for HI Fan Motor Tap FS Float Switch YME Relay for ME Fan Motor Tap ITI Internal Thermostat for Indoor Fan Motor YLO Relay for LO Fan Motor Tap MD Motor for Drain Discharge Mechanism YSLO Relay for SLO Fan Motor Tap MIF Motor for Indoor Fan Y52H Relay for Electric Heatrer MV Micro Computer Control Expansion Valve Terminals LED 3 Alarm Code kL Close end Connector PCB Printed Circuit Board X Field Supplied RCS Remote Control Switch Field Wiring RSW Indoor Unit No Settings a Earth Wiring SSW Slide Switch Factory Wiring TB Terminal Board ELECTRICAL WIRING DIAGRAMS 7 7 7 6 ELECTRICAL WIRING DIAGRAM FOR MODELS RPI 2 0 5 0FSG2Ei
55. OU ENE CHEO A ESOO Se f ai i dw edid pinbr T S T S e S e dwe ay e61ey9810 Pot za MOE lo resp 4 ess A A AS le a a uoneoipul dwe g Aqpemouy zer ze zr z z zi z z zewo vepomyoou Po paxy9ayoy ajeq apo9 wely ON NI TON Wuajs s ON leuas N I 4eq uogejjesu I PON NI USO UY9 IMS OMJUOJ ajoweaSy Aq Bunmoayo 104 jeays ejeg YOUWMS JONJUOD sJowsyY Aq procosy SOULUAJUIEIA Y mS Y p NOLLINY LSNI AYOM 71313 FIELD WORK INSTRUCTION 4 7 Service amp Maintenance Record Service amp Maintenance Record No Action Fixing of Units Any Damage on Outer or Internal S YES or NO urface Checking of Screw and Bolts Tighten if loosen TEE Tightening of Terminal Screws Tighten all terminal screws by TIGHTENED or 9 9 phillips driver NOT TIGHTENED re compressor terminals Push all terminals PUSHED or tightly fixed j NOT PUSHED Measure insulation resistance by insulation resistance meter Insulation Resistance Comp and Fan GOOD or NOT GOOD Motor greater than 3MQ Others greater than 3MQ Check for smooth flow by pouring water GOOD or NOT GOOD Check for leakage at compressor Check for any leakage GOOD or NOT GOOD Check for leakage at ditto GOOD or NOT GOOD outdoor heat exchanger Check for leakage at ditto GOOD or NOT GOOD indoor heat exchanger Check for leakage at 4 way valve ditto GOOD or NOT GOOD ditto GOOD or NOT GOOD ditto GOOD o
56. PSC ONE X PSH lt A on l 1 DCL2 DCL1 apie PLANE A PLANE B PLANE C Mark Name Mark Name ACT Active Module NF 4 6 Noise Filter Ci 3 Capacitor PCB1 Printed Circuit Board CB Capacitor PSC Pressure Switch for Control CMC Contactor for Compressor Motor PSH High Pressure Switch for Protection DCL 2 Reactor PSW Push Switch on PCB1 DSW1 Test Run PSW2 Push Switch on PCB2 DSW2 Optional Function Setting PSW Push Switch on PCB3 DSW3 Unit Capacity Code RS Resistor for Starting DSWa Refrigerant cycle N RVR Reversing Valve Relay DSWs Transmission setting TB1 Terminal Board EF1 Fuse TF1 Transformer ISPM Inverter System Power Module THM Ambient Air Thermistor MC Motor for Compressor THMg Evaporator Pipe Thermistor MOF Motor for Outdoor Fan 1 THMo Dsicharge Gas Thermistor MOF Motor for Outdoor Fan 2 ZNR Surge absorver MV Micro Computer Control Expansion Valve 8 REFRIGERANT CYCLE REFRIGERANT CYCLE CONTENTS 8 REFRIGERANT CYCLE 8 1 Refrigeration Cycle Single type 8 2 Refrigeration Cycle Twin type 8 1 8 2 REFRIGERANT CYCLE 8 1 REFRIGERATION CYCLE SINGLE TYPE Indoor Unit RCI 3FSG2Ei Outdoor Unit RAS 3HVRG III x boas AN a A NR Ser o 09 53 A ba at 919 05 4 Fd NY Refrigerant Flow Direction Cooli
57. SPM measure the resistance If all the resistances are more than 100 kQ it is normal f By touching the side of the tester to the P terminal Se 55 O a of ISPM and the side of the tester to U V and W of a an ISPM measure the resistance If all the resistances a are more than 1 kQ it is normal de gt Lo ya a a S o el EL ES l By touching the side of the tester to the N terminal of ISPM and the side of the tester to U V and W of ISPM measure the resistance If all the resistances are more than 100 kQ it is normal Q By touching the side of the tester to the N terminal of ISPM and the side of the tester to U V and W of ISPM measure the resistance If all the resistances are more than 1 kQ it is normal YA 6 F 1500
58. Switch 03 Freeze Protection Overheating Protection Instantaneous Power Failure at Outdoor Unit Reset NOTE 3 Stoppage of Cooling Operation due to Low GA Air Temperature Stoppage of Heating Operation due to Demand Enforced Stoppage 13 Retry due to High Pressure Increase Retry due to Decrease of Discharge Gas Superheat 17 Retry due to Inverter Tripping Retry due to Abnormal Current to Comp Expansion Valve Opening Change Protection Operation Mode Changeover of Indoor Unit 24 Thermo OFF during Energy Saving Operation Retry due to Input Protection Instantaneous Power Thermo ON A condition that an indoor unit is 16 Failure Occurrence requesting compressor to operate requesting compressor to operate NOTE 2 Even if stoppage is caused by Alarm 02 is not Symbols with a letter Y are relays on PCB Alarm NOTE 2 Instantaneous Power Failure at Indoor Unit Reset NOTE 4 Ka High Outdoor Air Temperature i Retry due to Abnormal High Temperature of Discharge Gas Excessively Low Suction Pressure Retry due to Voltage Decrease Other Retry due to Inverter Enforced Thermo OFF Twin Type Only NOTE 5 NOTE 1 Explanation of Term Times in Indoor Unit Thermo OFF A condition that an indoor unit is not always indicated Transmission Error NOTE 3 If transmission between the inverter printed circuit board Occurrence Times and the control printed circuit board is not performed 17 between Remote during 30 seconds the outdoor
59. The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when AC 220V or 240V is supplied to voltage PCN9 1 and 3 on PCB1 in the outdoor unit during CMC is opened LA S N TE E Is 220VAC or 240VAC applied PCN9 1 and 3 during stoppage PCN9 PCN8 PCN3 o ojo o PCB1 is Normal Check wiring connection except PCB1 E E O Ors o o o o o o o o o o PCN7 _ PCN10 PCN2_ PCN5 O O l Check PCB1 by Faulty PCB1 self checking Replace PCB1 Refer to Item 1 3 1 HITACHI he TROUBLESHOOTING Alam Jf l Cooling Overload Code l 1 High Pressure Switch will be Activate This alarm code is indicated when the protection device is activated at following condition Evaporating temperature of outdoor unit is more than 55 degree and top of compressor temperature is more than 95 degree No Is the voltage between IsCMC ON XE PONG and 3 220V 240V Is protection device activated No gt Faulty PCB1 Yes No Is CMC ON more than 3 seconds p Yes Check the following value by remote control switch 1 Top of Compressor Temperature 95
60. Unit Ambient a Repair wiring and Incorrect Connection Check wiring to PCB1 cnnnasione Replace PCB1 and Faulty PCB1 check operation Replace PCB1 if faulty 136 HITACHI TROUBLESHOOTING Abnormality of Thermistor for Evaporating Temperature during Heating Operation Outdoor Unit Evaporating Thermistor O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB If abnormality with the thermistor is found check all the thermistors as shown below This alarm code is indicated when the thermistor is short circuited less than 0 2 KQ or cut greater than 500 kQ during operation The evaporating thermistor during the heating operation is attached to the heat exchanger as shown below figure Is it connected to THM8 Te of PCB1 No my orar r fi p Yes Is resistance of the No thermistor between gt Faulty Thermistor 0 2kQ and 500k22 Regarding the thermistor characteristics ue refer to page 1 30 I Faulty PCB1 Thermistor Evaporating Temperature for Outdoor Unit Acti for Evaporating lastre Fe Repair wiring and during Heating Incorrect Connection Check wiring to PCB1 connections Replace PCB1 and n Faulty PCB1 Replace PCB1 if faulty
61. agram Outline a 2 1A PCN201 PCN202 AC220 240V From Control PCB Input Duty Signal From Control PCB b 5 6A AC220 240V From Control PCB Input Duty Signal From Control PCB 34 HITACHI MAIN PARTS 3 3 Auto Louver Mechanism 3 3 1 4 Way Cassette Type 1 Auto Louver Operation The louvers of the optional air panel with auto louver swing simultaneously by four drive motor The parts of the auto louver mechanism are shown below The motor 1 is installed to the louver directly The louver 2 is operated by rotating the motor Four pieces of the motor 1 are installed to the unit and rotated simultaneously Stopper AS 3 Bearing AS 4 1 Yaa 2 Louver f 1 Motor 4 Stopper AS Q 3 Bearing AS 2 Auto Louver Stoppage Press the AUTO LOUVER of the remote control switch during auto louver operation O zero Reset The AS stopper of the louver 2 touches the steel Mot plate stopper and the louver 4 Motor Totar is reset to the 0 position The power supply for the motor 1 is turned OFF when Steel Plate the louver is at the setting Stopper position 2 Louver The louver is stopped at the setting position HITACHI s MAIN PARTS 3 3 2 2 Way Cassette Type 1 Auto Louver Operation The louvers of the optional air panel with auto louver swing simultaneously by a drive motor The parts of the auto louver mechanism are shown below Y bo Bearin
62. air inlet thermistor is set at the temperature higher than the value indicated on the remote control switch by 4 C and the maximum is 30 C because the suction air temperature during heating operation has a tendency to become higher than that of the occupied zone intending comfortable heating operation 3 Thermistor for Indoor Discharge Air Temperature For Discharge Air Temperature Control The thermistor for indoor discharge air temperature is utilized for the control of prevention from cold air discharge in heating operation etc The resistance characteristics of thermistor is shown in the above figure 4 Thermistor for Liquid Pipe Temperature of Indoor Heat Exchanger When the temperature of the heat exchanger is below 0 C thermostat is turned OFF automatically and over 14 C onto the heat exchanger in thermostat is turned ON again COOL and DRY operation Prevention from freezing The resistance characteristics of thermistor is shown in the above figure 5 Thermistor for Gas Pipe Temperature of Indoor Heat Exchanger When the temperature of the heat exchanger is below 0 C Prevention from freezing thermostat is turned OFF automatically and over 14 C onto the heat exchanger in thermostat is turned ON again COOL and DRY operation The evaporating temperature in heating operation is detected The resistance characteristics of thermistor is shown in the above figure HITACHI oF MAIN PARTS 3 5 2 Thermistor for
63. all the switches are depressed switches is available the checking do not proceed to the next item 2 Depressing 2 or more switches simultaneously is invalid and not counted AS ait For 1 second SUS ONOFFTIMER SET ear yr ye For 1 second he CHECK SUA ONOFFTIMER SETTEMP Ich says DEFROST a al for ends cENtRaL Seve FiLTER HSTRG 741 CHECK The LCD indication changes as shown below The remote control switch automatically starts to check the transmission circuit y To the next page In case that the transmission circuit is abnormal gt the LCD indication remains as the left figure and the checking do not proceed to the next item ie HITACHI TROUBLESHOOTING The LCD indication changes as shown below The detected temperature of remote control thermostat is indicated at the part A in the figure below If the number or FF is indicated at the A part the remote control thermostat is abnormal The LCD indication changes as In case of depressing the RESET switch or shown below leaving 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 indicated at the A part shown in the figure below When the number 99 is indicated EEPROM is abnormal In case that EEPROM is not canceled depress the CHECK switch The number indica
64. ansformer DSWs Refrigerant Cycle No TH Thermistor for Electric Heater DSWe Unit Code THM1 Inlet Air Thermistor DSW7 Fuse Recover Remote Controller Selector THM2 Outlet Air Thermistor EFR1 Fuse THM3 Liquid Pipe Thermistor EFS1 Fuse THM5 Gas Pipe Thermistor EHW H2 Electric Heater for Condensate Air Protection YH2 Relay for HI Fan Motor Tap FS Float Switch YH1 Relay for HI Fan Motor Tap ITI Internal Thermostat for Indoor Fan Motor YME Relay for ME Fan Motor Tap MD Motor for Drain Discharge Mechanism YLO Relay for LO Fan Motor Tap MIF Motor for Indoor Fan YSLO Relay for SLO Fan Motor Tap MS Motor for Automatic Swing Louver Y52H Relay for Electric Heatrer MV Micro Computer Control Expansion Valve Terminals LED1 3 Alarm Code X Close end Connector PCB Printed Circuit Board x Field Supplied RCS Remote Control Switch Field Wiring RSW Indoor Unit No Settings daas Earth Wiring SA Surge Absorber Factory Wiring 76 LECTRICAL WIRING DIAGRAMS 7 5 ELECTRICAL WIRING DIAGRAM FOR MODELS RPI 1 5FSG2Ei
65. changer Liquid Pipe Temp C NOTE 1 During transient period such as starting time etc may be indicated for a limited time This is indicated only when a remote sensor is connected The indication of is normally indicated RPK series can not connect a remote sensor Therefore indication is 5 Temperature at Remote Sensor C Outdoor Unit Ambient Air Temp C Indoor Unit Heat 7 Exchanger Gas Pipe Temp C Outdoor Unit Evaporating Temp during Heating C 2 Control Information Discharge Gas 10 Temp at the Top of UN Comp Chamber C to next page This indicates the internal information for the remote control switch In case that temperature is higher than 126 C 175 HITACHI TROUBLESHOOTING Thermo Temp of Remote Control Heating Thermo ON Alarm HITACHI Switch Cooling Thermo SA Operation FAN HIGH SW papel rs SET TEMP Dark N En 4 7 H2 CCENTRAL Sore AUTO vENT H STRG ffi 5 E Mf Seu 4 Micro Computer Input Output in paa E Indoor Unit Dark N G VENTI LOUVER Micro Computer Input Output in Outdoor Unit Outdoor Fan Indication of Unit Stoppage Cause C Abnormality Occurrence Counter Occurrence Counter Abnormality y 5 Occurrence Times 00 Operation OFF Power OFF Thermo OFF NOTE 1 Activating Float
66. crew after removing the screws 2 Do not lose the insulation sheet between ACT module and fin Phillips Screwdriver Long Nose Pliers ACT Module Fan Motor Lead Wires Mu CN201 CN202 CN203 CN204 Ea ISPM CN206 ES Fan Motor o Lead Wires TE PCN202 Fixing Screw 0100 for Inverter Module Power Cable Insulation Sheet for Compressor NOTES 1 Identify terminal Nos with the mark band Nos when reassembling If incorrectly connected malfunction or damage to the electrical parts will occur 2 In the case of mounting ACT module check the insulation sheet does not have any hole and insulation tube attach to the fixing screw 3 Pay attention not to clamp the wires when close the power plate ae HITACHI SERVICING TURN OFF all power source switches 2 1 11 Removing Electrical Components A DANGER Do not touch the electrical parts when LED201 Red is on the ISPM is lit to prevent from an electrical shock 1 Remove the service cover according to the item 2 1 1 Removing Service Cover 2 Remove three 3 screws fixing the electrical box and turn the power plate toward the front side NOTE Check to ensure that LED201 Red is OFF when turning the power plate 3 Removing Other Electrical Components a Remove the wir
67. da eh a a q af EHE ES eae A Bw 86 met CA e Ao FS Dy a a 49FE a iring Work at Air Panel Side CASE OF RCI 2 5 5 0FSG2E P G23 46WA H 2E1 Panels Only PCB Sockets Location CNI CNI7 CNI4 CN7 CNS PONS PONT PCN6 PONS PENI PONS PCNIO Louver Sensor al Tape Control Power Source YH2 Y52H YME YLO YSLO YHI LED1 LLLLL LLY o lo Rw O LED2 PCN2 o LED3 EFRI CN2 a EFS1 3 5 5 2 ERE coo CN12 CN13 SSW CN10 CN11 CN3 THM5 THM3 THM1 HIGH VOLTAGE NOTE All the field wiring equipment must comply with local codes Mark Name Mark Name CA Capacitor for Indoor Fan SA Surge Absorber CN 21 27 Connector SSW Slide Switch DSW3 Unit Capacity Code TB Terminal Board DSWs Refrigerant Cycle No TF Transformer DSWe Unit Code THM1 Inlet Air Thermistor DSW7 Fuse Recover Remote Controller Selector THM2 Outlet Air Thermistor EFR1 Fuse THM3 Liquid Pipe Thermistor EFS1 Fuse THM5 Gas Pipe Thermistor EHW H2 Electric Heater for Condensate Air Protection YH2 Relay for HI Fan Motor Tap FS Float Switch YH1 Relay for HI Fan Motor Tap ITI Internal Thermostat for Indoor Fan Motor YME Relay for ME Fan Motor Tap MD Motor for Drain Discharge Mechanism YLO Relay for LO Fan Motor Tap MIF Motor for Indoor Fan YSLO Relay for SLO Fan Motor Tap MS Motor for Automatic Swing Louver Y52H Relay for Electric Heatrer MV Micro Computer Control Expansion Valve Terminals LED1 3 Alarm Code kL Close end Connector PCB Printed Circuit Board EA Field Suppli
68. de is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 0 24 KQ or cut greater than 840 kQ during the cooling or heating operation The system is automatically restarted when the fault is removed Is it connected to THM1 intake of PCB No mE comes y Yes Is resistance of THM1 No between 0 24kQ and gt Faulty Thermistor 840kQ Indoor Unit e Noa Air Inlet Thermistor Faulty PCB A In Case of 4 Way Cassette Type Acti Faulty Intake Aso Repair wiring and Incorrect Connection Check connection Replace PCB and Faulty PCB Replace PCB if faulty 90 82 80 70 61 60 Thermistor 59 Resistance KQ 40 46 35 30 27 20 5 20 16 12 5 10 8 53 3 6 25 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 Ambient Temperature C Thermistor Characteristics NOTE This data is applicable to the following thermistors 1 Indoor Unit Discharge Air Temperature 2 Indoor Unit Liquid Refrigerant Temperature 3 Indoor Unit Intake Air Temperature 4 Outdoor Air Temperature 5 Outdoor Unit Evaporating Temperature 6 Indoor Unit Gas Piping 1 30 HITACHI TROUBLESHOOTING Alarm 71 Abnormality of Thermistor for Indoor Unit Discharge Air Temperature
69. e connecting to the capacitor NOTE Capacitor has polarity and check to ensure each terminal No b Disconnect the wire connecting to the magnetic contactor Remove the magnetic contactor by removing two 2 screws c Remove the reactor by removing four 4 screws In case of 5HP the screws are eight d Disconnect the wire connecting to the noise filter Remove the noise filter by holding the expanded part of the holders 6 pcs with long nose pliers NOTE When reassembling identify terminal Nos with the mark band Nos Phillips Screwdriver Long Nose Pliers RAS 3HVRG and 4HVRG RAS 5HVRG eM LED201 Red LED201 Red y gt gt Act Module Fixing Screw for M ti agnetic Capacitor 3 pieces Noise Fi Capacitor Reactor s as Magnetic Contactor y Fixing Screw for 7 Magnetic Contactor Fixing Screw for Reactor Fixing Screw for Reactor Long nose Plier Noise Filter _ Holder Details of Q HITACHI on MAIN PARTS 3 MAIN PARTS 3 1 Inverter 3 1 1 Specifications of Inverter Output Characteristics f Hz 115Hz Characteristics are general idea Soft Start Stop 0 5Hz S 1Hz S 3Hz S 6Hz S 30Hz S 5 Steps Protection Function Excessive High or Low Excessive Low Voltage at a voltage is lower than 194V DC Voltage for Inverter Excessive High Voltage at a voltage is higher than 440V DC Abnormality of Current Stoppage at a current of compressor smaller than 1 5A Sensor
70. e of Discharge Gas Temperature Td gt 127 C Cooling Td gt 120 C Heating over 10 minutes or Td gt 140 C over 5 seconds Inlet Air Thermistor Outlet Air Thermistor Failure of Thermistor Loose Terminal Freeze Protection Thermistor Disconnected Wire Gas Piping Thermistor Tripping of Protection Device Activated Internal Thermo of Fan Motor Compressor Thermistor Sensor on Indoor Unit Failure of Thermistor Loose Terminal Outdoor Air Thermistor Disconnected Wire Evaporating Thermistor Locked Motor in Heating Operation Incorrect Setting of Capacity Combination or 31 Incorrect Capacity of Outdoor and Indoor Unit Incorrect O U Capacity Setting System Sensor on Outdoor Unit Incorrect Indoor Unit No Setting Duplication of Indoor Unit No FSG2E series connects to HVRG series outdoor unit European Area Only HRG series of the indoor unit is connected to FSG 1 and FXG 1 series outdoor units European Area Only Abnormality of Protective Circuit in outdoor Unit Failure of Protection detecting Circuit Overload cooling O U Pipe Thermistor Temp is Higher than 55 C pai A and the Comp Top Temp is Higher than 95 C Possibility of high pressure device activation when O U Protection Device is activated I U Freeze Protection Thermistor Temp is Higher Pressure ron ada canas than 55 C and the Comp Top Temp is Higher than y gnp f 95 C when O U Protection Device is activated 6 Incorrect Combinatio
71. e width Modulation TB Terminal Board 1 TB2 Terminal Board 1 TF Transformer THM Inlet Air Thermistor THM2 Outlet Air Thermistor THM3 Liquid Pipe Thermistor THMs Gas Pipe Thermistor YH2 Relay on PCB Terminals xX Field Supplied v Field Witinrg Earth Wiring Factory Wiring ELECTRICAL WIRING DIAGRAMS 7 5 7 4 ELECTRICAL WIRING DIAGRAM FOR MODELS RPC 2 0 5 5FSG2Ei TF Inlet Outlet Liquid Gas RCS 3 g 5 AE
72. east twice a year O Drain up Mechanism Inspect for activation of drain up mechanism c Float Switch O Activation Inspect for activation of float switch 3 For Outdoor Unit a Compressor O Sound and Vibration Inspect for abnormal sound and vibration O Activation Inspect for that the voltage drop of power supply line is within 16 at start and within 2 during operation b Reverse Valve O Activation Inspect for any abnormal activating sound c Strainer O Clog Inspect for that no temperature difference between both ends d Earth Wire O Earth Line Inspect for continuity to the earth e Oil Heater O Activation The oil heater should be activated at least 12 hours before start up by switching ON the main power source a HITACHI Sp IHOV LIH juaubas ay uo apos ayy Aq 8 1 dYNN J9 89H IlO HO YAY LZ DSd HE9 DINO DZG YUN 100pu A HUN JOOPINO NO YMS Jozu BJOWSY MS 9 Y apoy asney abeddojs pun Joopuj dwa 1y PRNO dwa 41y axejul due pinbiq JaBueyoxy Jean Bujuado sajeA uorsuedx3 CoN Hun HUN J0OPuU uano Buluuny sosseidwo09 UONEWUJOJU O1JUCD ounyesaduia Ul4 Jay19Au apoy asneg abeddojs Jayanu aunyesadwia JOOP NO Ps sd ainjeieduie L edig pinbr seBueyoxa 1e9H A eS ainjeiedwie Seg o 1eyosid O o T S e a Bujuado enjen uo suedx3 JUN 100PNO O T T AAA Sa daig ue 100PnO OO OT Aouenbei 4 palmbey IS TE E E E y y f RENE EEE EEE EEE EE a eee Fe po9 wel
73. ed RCS Remote Control Switch suse Field Witinrg RSW Indoor Unit No Settings OO O OoOO O S fC C Earth Wiring Factory Wiring ELECTRICAL WIRING DIAGRAMS 7 3 7 2 ELECTRICAL WIRING DIAGRAM FOR MODELS RCD 1 5 3 0FSG2 Connector Field Connection for 240V A 240V i Conector i zy for 220 Bo p 220V jey i a wea INLET OUTLET is gle leV i i T FREEZE INe CN27 bh os e 220 240V 50Hz Pe CN28 GN PCB i g Siy e lao de near daa HH Te E 4 4 Poni 9 CNI cni7 2888 cn e ole sas 9 0 TB NE _ THM
74. eplace PCB1 and 3 Faulty PCB1 check operation Replace PCB1 if faulty Temperature C Resistance KQ Temperature C Resistance kQ 500 66 70 sn 2961 21 31 pp 0 18 17 15 55 249 20 200 00 ps f 18145 po ss 131o 100 The resistance value have fudge factor 10 72 32 105 11 50 59 97 i HITACHI 1 35 TROUBLESHOOTING Abnormality of Thermistor for Outdoor Air Temperature Outdoor Unit Ambient Thermistor O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 0 2 kQ or cut greater than 500 kQ during running However this alarm occurs during test running mode only In the case that the thermistor is abnormal during running operation continues based on the assumption that the outdoor temperature is 35 C Cooling 6 C Heating Outdoor Unit Ambient Thermistor Is it connected to THM7 TA of PCB1 No mm conca y Yes Is resistance of THM7 between 0 2kQ and 500kQ2 No gt Faulty Thermistor Refer to page 1 30 U Yes Faulty PCB1 Acti F Replace thermistor Faulty Thermistor Check resistance if faulty for Outdoor
75. form within 7 seconds to check another unit After 7 seconds To View the Previous Indication Check Mode 1 TEMP See 1 2 3 1 for details Press To View the Next Indication TEMP Press AN Press A to view the next data Press V to view the previous data CHECK Unit Number and Fae a Alarm Code Displayed Ale SeRenes After 7 seconds X ADDS Number of Indoor Unit in No Cycle Check Mode 2 RN No Refrigerant Cycle See 1 2 3 2 for details TEMP Press O In Check Mode 2 Data of the first three units connected serially to a remote control switch are available You can press the CHECK switch to release Check Mode 2 Check Mode 1 cannot be released even if you press the CHECK switch Check Mode Released B Press USS HITACHI 153 TROUBLESHOOTING 1 Contents of Check Mode 1 The next indication is shown by pressing A the part of TEMP switch If the V part of TEMP switch is pressed the previous indication is shown 1 54 Indication of Category Code Indication of Temperature etc Temperature Indication Indoor Unit Temp A T t Displ Setting C emperature isplayed Thermistor Open circuited or or PCB Defected Indoor Unit Intake Air Temp at Thermistor C EA Thermistor Short circuited or or PCB Defected Indoor Unit 3 Discharge Air Temp at Thermistor C Indoor Unit Heat 4 Ex
76. g Louver Bearing Arm Shaft B Stopper Arm AN a AS Motor assembly WES W 50 Stopper oo o y 0 Stopper Bearing Louver Bearing Arm Shaft A The principle of the auto louver mechanism is as follows The motor 1 rotates the crank 2 fixed to the shaft of the motor 1 rotates the rotating torque is changed at the arm 3 and transmitted to the arm shaft A 4 and the arm shaft B 5 The circular reciprocating force gives the driving force to the louver 6 and rotates the louver Arm Shaft B 2 Crank 6 Louver 7 Fixing Plate of Arm Shaft A Motor 2 Auto Louver Stoppage 4 Arm Shaft A Press the AUTO LOUVER of the remote control switch Bearing during auto louver operation 6 Louver Bearing The crank 2 touches the stopper of the fixing plate of motor 7 and the louver is reset to the O position Bearing 5 Arm Shaft B The power supply for the motor 1 is turned OFF when the louver is at the setting 3 Arm position 7 Fixing Plate for Motor _ 1 Motor Motor Shaft The louver 6 is stopped at the setting position 3 Arm HITACHI MAIN PARTS 3 3 3 Ceiling Type 1 Auto Louver Operation The louvers of the optional air panel with auto louver swing simultaneously by a drive motor The parts and the principle of the auto louver 1 AS Motor mechanism are shown in the right fig
77. gh Voltage for Inverter O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when voltage between terminal P and N of ISPM is insufficient and its occurrence is three times in 30 minutes In the case that the occurrence is smaller than 2 times retry is performed Is the power supply No Check wiring and voltage 220V SSS cable capacity 240V 10 y Yes No o in gt 187V during operation NY Yes Does the voltage Yes fall during operation by operation of other apparatus Frequency can No increase higher g than 60Hz How is compressor Compressor stops C gt immediately E gt Seti i lower than 20Hz Yes Does LED201 on ISPM ON gt operation Ne Compressor stops when frequency increase Approx Is connection 20Hz to 60Hz correctly between ISPM and DCL CB or CMC Connect correctly Yes Loose Wiring Be careful especially because of high voltage Cae of Color Is the DC Ed T o gt E Check over 250V CB Fault Normal Replace capacitors Capacitors have high voltage Be careful especially 1 Faulty ISPM Replace it Check the wiring ISPM and capacitors CB 2
78. heating operation does not increase during cooling Fully Closed It is abnormal if the temperature does operation not increase Locked It is abnormal under the following It is abnormal if the liquid pipe pressure with conditions The temperature of freeze does not increase and the outlet Slightly Open protection thermistor becomes lower temperature of the expansion valve than the suction air temperature when decreases after the cooling operation the unit under checking is stopped and is started other units are under cooling operation Locked It is abnormal under the following Electronic Expansion Valve 43 with tes Aa a conditions After heating operation for Freeze Protection Fully Open Thermistor more than 30 min the discharge gas temperature of compressor is not 10 C higher than the condensing temperature and there is no other faults such as excessive charge of refrigerant etc Unit Under Checking HITACHI vas SERVICING 2 SERVICING 2 1 Outdoor Unit TURN OFF all power source switches 2 1 1 Removing Service Cover Remove the main parts according to the following procedures To reassemble perform the procedures in reverse To prevent contamination of the refrigerant with water or foreign particles do not expose open to atmosphere for long periods If necessary seal pipe ends using caps or tape Remove the two fixing screws upper part 1 lower part 1 slide the service cover downward and re
79. hing the side of the tester to the P1 terminal of ISPM and the side of the tester to R and S of ISPM measure the resistance If all the resistances are more than 1 KQ itis normal Ol a Inz asses OOS lies g PA YI e E Fl f HSS ASA Or o Jo c By touching the side of the tester to the N terminal of ISPM and the side of the tester to R and S of ISPM measure the resistance If all the resistances are more than 100 KQ it is normal SE amp d By touching the side of the tester to the N terminal of ISPM and the side of the tester to R and S of ISPM measure the resistance If all the resistances are more than 1 kQ it is normal SE 6 HITACHI 1 69 TROUBLESHOOTING Po A A f af 4 sf i t T Ea Y A A i af 4 sf N o i e By touching the side of the tester to the P terminal of ISPM and the side of the tester to U V and W of I
80. igerant Cycle and pressure after vacuum pumping Clogging of Discharge Piping Check for clogging Remove clogging Liquid Line Stop Valve or Gas Line Stop Valve are Check stop valves Fully open stop valve not in Operation HITACHI 152 TROUBLESHOOTING pa A i Abnormal Transmitting between Indoor Units and Outdoor Unit O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section or the alarm code is indicated on the display of the outdoor unit PCB O This alarm is indicated when abnormality is maintained for 3 minutes after normal transmitting between indoor units and outdoor unit and also abnormality is maintained for 30 seconds after the micro computer is automatically reset The alarm is indicated when the abnormal transmitting is maintained for 30 seconds from starting of the outdoor unit Investigate the cause of overcurrent and take necessary action when fuses are melted or the breaker for the outdoor unit are activated vee HITACHI TROUBLESHOOTING Is DSW5 1P Terminal Resistance on PCB1 ON No Seti coreciy No Ta Is LED1 red on E PCB1 ON No Check the fuses of E gt outdoor unit power 1P Pin No 1 Is the voltage between 1P and 3P of PCN1 on PCB1 220V or 240V supply y Yes Remove CN8 of PCB1 1 Is connector PCN2 Yes S
81. ing operation No Is the thermistor connected to THM3 of PCB gt oe l ist f THM3 Ne s resistance o between 0 24 and 840kQ gt Faulty Thermistor Yes Refer to page 1 30 for lt 7 thermistor resistance Faulty PCB In Case of 4 Way Cassette Type Acti Replace thermistor Protection Thermistor ia Repair wiring and Replace PCB and f Faulty PCB Replace PCB if faulty HITACHI bak Freeze Protection Thermistor THM3 TROUBLESHOOTING Alarm Cd Abnormality of Thermistor for Indoor Unit Heat Exchanger Code l Gas Refrigerant Pipe Temperature Gas Piping Thermistor O RUN light flickers and ALARM is indicated on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 0 24 kQ or cut greater than 840 kQ during the cooling or heating operation The system is automatically restarted when the fault is removed Is it connected to THM5 of PCB I Yes Is resistance of THM5 No between 0 24kQ and E Faulty Thermistor cist Refer t 1 30 f efer to page 1 30 for pe thermistor resistance Thermistor for No HIM corea Heat Exchanger Gas Pipe Faulty PEB In Case of 4 Way Cassette Type Acti for Indoor Unit a R Repair wiring and as Fipe lemp Incorrect Connecti
82. ing to the item 2 1 1 Removing Service Cover 2 Remove the three 3 screws fixing the electrical box and turn the power plate toward the front side as shown in the item 2 1 7 Removing Coil for Reverse Valve NOTE Check to ensure that LED201 Red is OFF when turning the power plate 3 Disconnect the CN5A connector on the PCB1 of the electrical box 4 Pull out the coil for expansion valve on the liquid tank upwards Phillips Screwdriver Spanner Pull out the expansion valve coil upwards Expansion o Valve Coil Liquid Tank HITACHI A SERVICING TURN OFF all power source switches 2 1 9 Removing Printed Circuit Board PCB1 A DANGER Do not touch the electrical components When handling the PCB1 take care of not to use excessive force as this will cause damage 1 Remove the service cover according to the item 2 1 1 Removing Service Cover 2 Disconnect all the connectors connected to the PCB1 3 Pull out the PCB1 from the power plate by unhooking the extrusion parts Phillips Screwdriver Long Nose Pliers Holder Holder PCB1 for Control Power Plate Partition Plate Transformer Terminal Board Holder PCB1 for Control HITACHI SERVICING TURN OFF all power source switches 2 1 10 Removing ISPM and ACT Module A DANGER Do not touch the electrical parts when LED201 Red on the ISPM is lit to prevent from an electrical shock 1 Remove the service cover
83. ire of Thermistor Failure of Remote Indoor Fan Control Switch Speed is Not Changed Failure of PCB for Indoor Unit Check the indoor unit Failure of AC Chopper stoppage when the Replace if AC for Indoor Unit remote control switch Chopper is failed is switched OFF Failure of Failure of Thermistor Thermistor for Outdoor connect when it is Evaporating Disconnected Temp during H wire of abnormal Heating Thermistor Replace of correctly Disconnected 4 Way Valve Failure of Coil 4 Way Valve incorrect Activation of 4 Way Valve Measure resistance of coil Replace 4 Way valve Enforced power supply No Defrosting d PR Operation Mode is Available E Disconnected Control Wires eal Heating between Indoor Unit and Check connectors Correctly connect peration or Outdoor Unit wiring Defrosting Operation is Continued Disconnected Correctly connect Failure of Wires to PCB Check connectors wiring Outdoor Unit PCB Failure of Replace it when check PCB mode is not available Disconnected Correctly connect Indoor Unit PCB Failure of PCB Failure of PCB in Indoor Unit or Remote Control Switch Check PCB by Light and self checking 1 Replace if PCB is failed LCD Indication on Remote Control Switch are Kept ON 1 Refer to Item 1 3 1 to 1 3 2 2 Refer to Item 1 2 3 HITACHI on TROUBLESHOOTING 1 1 6 Abnormalities of Devices E 23 Phe
84. it 2 Discharge Air Temp Correspond to check mode 1 3 at Thermistor C Indoor Unit Heat Exchanger Liquid Pipe Temp Freeze Protection C Outdoor Air Temp C Indoor Heat 5 Exchanger Gas Ee Pipe Temp C Evaporating Temp at Heating C Control Information Discharge Gas Temp at the Top of Correspond to check mode 1 4 1 Correspond to check mode 1 Correspond to check mode 1 D Correspond to check mode 1 Correspond to check mode 1 Correspond to check mode 1 Comp Chamber C to next page HITACHI Esp TROUBLESHOOTING 1 58 Compressor Pressure Frequency Indication Disch P g High 0 1 MPa Correspond to check mode 1 Suction Pressure Low x 0 01 MPa Control Information HH Operating Frequency Hz Expansion Opening Indication Correspond to check mode 1 Correspond to check mode 1 Correspond to check mode 1 Indoor Unit 13 Expansion Valve el Correspond to check mode 1 Opening Outdoor Unit 14 Expansion Valve pp MV1 Opening Estimated Electric Current Indication Correspond to check mode 1 Compressor Running Current A Correspond to check mode 1 Returns to Temperature Indication Temperature Indication HITACHI ny n bee ny n A TROUBLESHOOTING 1 2 4 Troubleshooting by 7 Segment Display 1 Checking Method by 7 Segment Display By using the 7 segments and check switch
85. itch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm is indicated when the any alarm code of 51 52 53 and 54 occurs the abnormality 3 times in 30 minutes including 3 Retry operation is performed up to the occurrence of 2 times Conditions ISPM Thermistor is more than 100 deg Restart operation Does it trip soon Yes HAS Replace the ISPM 1 F Is the silicon grease coated Apply the silicon grease securely between ISPM and between ISPM and fin fin securely 2 l Yes Is the heat exchanger of Yes outdoor unit clogged C O Remove clogging No Replace the ISPM 1 1 Before replacing the ISPM refer to item 1 3 3 1 regarding electrical discharge 2 Silicone grease P22760 is available as a spare parts HITACHI 149 TROUBLESHOOTING Alam JUN Code 7 Abnormality of Fan Motor Protection O RUN light flickers and ALARM is indicated on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the unit No and alarm code are indicated on the display of the outdoor unit PCB This alarm is indicated when the revolution pulse output from the fan motor is 10rpm or less and the reverse revolution signal is detected The fan motor is stopped once and restarted
86. ity 3 Wired Left Side Right Side swi Left Side ff ma H Non Polarity 2 Wired for PC P1H Right Side ff tom H Polarity 3 Wired for PC 2H2 NOTE e Factory Setting is for PC P1H DSW7 SW1 In the case of using PC 2H2 set as below ON g At s 1 2 Turn Right Side OF HITACHI 19 TROUBLESHOOTING 2 Outdoor Unit TURN OFF all power sources before setting Without turning OFF the switches do not work and the contents of the setting are invalid Mark of W indicates the position of dip switches Set the dip switches according to the figure below NOTE e By using switch DSW1 the unit is started or stopped after 10 to 20 seconds after the switch is operated e Make the outdoor unit No clear to distinguish from other outdoor units for service and maintenance For Test Run id lig ON 1234 OFF 1 Test Run Cooling 2 Test Run Heating 3 OFF 4 Compressor Forced Stop Optional Function Setting fa li ON 123456 OFF RAS 3HVRG Ae ON 12 3 4 OFF 1 OFF 2 Energy Saving Operation ON Cancel OFF Set OFF No Set ON Set 4 Cancellation of Outdoor Ambient Temp Limit OFF No Set ON Set 5 Cancellation of Fan Stop Operation during Defrost OFF No Set ON Set 6 OFF Capacity RAS 4HVRG RAS 5HVRG ARUBA ON Bill ON 1234 OFF 1234 0OFF HITACHI 3 Night Shift Mode Low Sound Ref Cycle No Setting CE
87. ity will be indicated see below for the priority order a Higher priority is given to protection control related to frequency control than the other lt Priority Order gt Low Pressure Ratio Protection High Pressure Ratio Protection High Pressure Increase Protection Input Protection Current Protection Discharge Gas Temperature Increase Protection Frost Protection b In relation to retry control the latest retrial will be indicated unless a protection control related to frequency control is indicated Protection Control Discharge Gas Temperature Increase Protection HA Frost Protection Protection Control Eni Low Pressure Ratio Control Ft High Pressure Ratio Control High Pressure Increase Protection Hg Inverter Trip Retry c p Insufficient Voltage Excessively urrent Protection High Voltage Retry FY F roaren Imbalanced Voltage Protection Inverter Module Temperature Increase Protection e Retry indication continues for 30 minutes unless a protection control is indicated e Retry indication disappears if the stop signal comes from all rooms NOTE The protection control code being indicated on 7 segment display is changed to an alarm code when the abnormal operation occurs Also the same alarm code is indicated on the remote control switch Remark Cause of Stoppage for indican ndication Corresponding Unit during Retry Alarm Code Automatic Stoppage of Transistor Module IPM Error Over
88. l Remote Control joa po CN2 i eratin i PRE Switch ee g PCBS e oe se 1 id Wiress Receiver Part Field Connection E 220V 60Hz 3 B H 0 0 LIR jo Sect oe Le Mr Electrical Control Box of Indoor Unit Mark Name PCB1 P Printed Circuit Board PCB2 Printed Circuit Board PSW301 Switch for emergency operation RSW Indoor Unit N Settings TB Terminal Board TF Transformer THM Inlet Air Thermistor THM2 Oulet Air Thermistor THM3 Liquid Pipe Thermistor THM4 Gas Pipe Thermistor THM1 5 Thermistor for Electric Heater Terminals X Field Supplied Field Wiring Earth Wiring Factory Wiring MIF Printed Circuit Board PCB1 lt M gt PCB1 P gt Dw PSW301 EF am LEM Nee PCN7 E PCM RSW CNI TAI A F DSWS CNI3 NOS Eu DSW2 CN29 CN1 CNC CN26 THML THM2 CN2 CN28 T3 TAS Sw EF 4 PCB2 S la VA CHol HA CN3 NOTE All the field wiring equipment must comply with local codes Mark Name CA Capacitor CN 3 13 303 Connector on PCB1 M CN 27 35 Connec
89. le LACT33020B oe HITACHI MAIN PARTS 3 2 AC Chopper Reduction of Electromagnetic Sound Fan Motor Control by AC Chopper Lower electromagnetic sound and vibration have been achieved by AC Chopper control than thyristor control AC Chopper Control Concept of Fan Speed Control The voltage applied to the fan motor is controlled by chopping ON OFF the power supply voltage at a frequency of 20kHz Features e Sinusoidal Wave Pattern and Remarkable Low Level of Electromagnetic Sound No Generation of Harmonic Current 1 Specifications Rated Current of AC Chopper Applicable Power Source Single Phase 220 240V 10 50 60Hz Output Voltage Single Phase 220 240V 10 Output Current Maximum 2 1A 5 6A Control Method AC Chopper Control Chopping Frequenc 20kHz 20 Input Duty Signal 100kHz 5 Current 2 to 8mA 10 6 Output Characteristics Output Duty 100 Input Duty b a Output Duty d c Input os Soft Start Input Duty 10 s Overcurrent Protection Method Current Limiter Overcurrent Setting Minimum Overcurrent Protection Area For 5 6A tput t A tput t A Output Current A GGG Protection Area Output Current A E Protection Area Max x 2 50Hz Max 50 Input Duty 30 40 50 Input Duty HITACHI qe MAIN PARTS 2 Structure a 2 1A For Indoor Units RCD RPC and RPI 2 5HP Models i FA O E 2 x ro lt 3 Circuit Di
90. move Phillips Screwdriver 2 1 2 Removing Air Outlet Grille Remove the two 2 fixing screws of the shroud Lift the air outlet grille holding the lower parts and unhook the extrusion 3 locations of the air outlet grille from the shroud Phillips Screwdriver Air Outlet Grille Catch 6 Locations Both Sides Shroud HITACHI SERVICING TURN OFF all power source switches 2 1 3 Removing Outdoor Fan 1 Remove the service cover according to the item 2 1 1 Removing Service Cover 2 Remove the air outlet grille according to the item 2 1 2 Removing Air Outlet Grille 3 Remove the fans by removing the cap nuts and the flat washers fixing the propeller fans onto the motor shaft If it is difficult to remove the fan use pullers 4 Remove the eight 8 screws fixing the upper Phillips Screwdriver Spanner cover and remove the upper cover Tool Adjustable Wrench or Puller Upper Cover 2 1 4 Removing Outdoor Fan Motor 1 Disconnect the connectors for the motors in the electrical box 2 Cut the plastic tie of the motor clamp by using nipper 3 Remove the four 4 fixing screws for the motor ex Nipper Phillips Screwdriver 09 Spanner Adjustable Wrench or Puller Screw with Spacer Fan Motor NOTES 1 When mounting the motor ensure the cables point directly downward Fix the protection tube edge downward to ensure the water may not keep in
91. n PCB THM3 Liquid Pipe Thermistor On PCB DSW7 Fuse Recover Remote Controller Selector On PCB THM5 Gas Pipe Thermistor On PCB RSW Indoor Unit no Setting On PCB TF Transformer EFR1 Fuse On PCB YME Relay for ME Fan Motor Tap DC Coil EFS1 Fuse On PCB YLO Relay for LO Fan Motor Tap DC Coil ITI Internal Thermostst for Indoor Fan Motor YSLO Relay for SLO Fan Motor Tap DC Coil LDi 3 Alarm Code On PCB YH1 Relay for Hi Fan Motor Tap DC Coil MIF Motor for Indoor Fan Terminals MV Expansion valve On PCB X Field Connection PCB Printed Circuit Board Field Wiring RCS Remote Control Switch Optional Part Earth Wiring RSW Indoor Unit No Settings On PCB Factory Wiring 7 10 ELECTRICAL WIRING DIAGRAMS 7 9 ELECTRICAL WIRING DIAGRAM FOR MODELS RAS 3 4HVRG 181 Connector for 220V ES Connector 240 PCN30 for 240V V ex 01 30 X A i OV 5 all S E Bena E Zion li i to 3 L2 N E j paepe Ma fe GE dl Ne ij EF 220 240 220V 50 60Hz 1 A1 d NF1 e ly Evaporator Discharge ambient pipe Gas E THM7 THM8 THM9 29 B1 a MV 00 s sy A A ol G ANF5 4 DSw1 6 DSW2 _4 DSW3
92. n of Indoor Unit ow NININI Ata Aa am al B nN oO jo ajo n wo 00 2 Stoppage by Excessively Decrease of evaporating Temperature Te lt 35 C is activated 3 times in one hour Locked Motor in Heating Operation Abnormality of Current Sensor for Inverter Failure of Control PCB ISPM Activating Overcurrent Protection Failure of ISPM Clogging of Heat Exchanger eee ISPM Abnormality 3 Inverter Activating Protection of ISEM Failure of Compressor clogging of Heat Exchanger 5 Abnormal Inverter Fin Thermistor 54 Inverter Fin Temperature Increase Clogging of Heat Exchanger Abnormal Outdoor Fan Disconnected wire or Incorrect wiring between 57 Outdoor Fan Fan Motor Abnormality Control PCB and Inverter PCB Incorrect Wiring or Fan Motor Abnormality Compressor Compressor Protection Alarm Failure of Compressor Activation of Low Pressure Decrease Protection Device 3 4 4 4 51 AbmommaliyofCurrentSensor o 52 Activating Overcurrent Protection EE Compressor CompressorProtection Alam 1 7 HITACHI a TROUBLESHOOTING 1 2 2 Troubleshooting by Alarm Code Al E e y i Activation of Safety Device in Indoor Unit O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the unit No and alarm code are indicated on the display of the outdoor unit
93. n switch re HITACHI TROUBLESHOOTING Al AV pol a Incorrect Indoor Unit No Setting O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated 3 minutes after power is supplied to the outdoor unit when the indoor unit No connected to the outdoor unit is duplicated by setting of RSW This alarm code is indicated that it is connected the same indoor unit number in the same refrigerant cycle In the case of H Link System this alarm code is indicated when DSW4 of the outdoor unit PCB and DSW5 of the indoor unit PCB are incorrectly set In this case set correctly DSW4 and DSWS5 after turning off Main Switch aa Y h Incorrect Combined Unit between Indoor Unit and Outdoor Unit O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the indoor unit does not suit for this outdoor unit Alarm Abnormality of Picking up Circuit for Protection Code I Outdoor Unit O RUN light flickers and ALARM is indicated on the remote control switch O
94. nected to the Outdoor Unit 2 Turn on the Outdoor Unit Auto addressing Starts During auto addressing the following items can be checked using the Outdoor Unit outdoor unit s on board 7 segment LED display Pino 1 Disconnection of power supply to the indoor unit Printed A E 2 Disconnection of the operating line between the outdoor and Circuit Board PCB1 indoor unit s In this case 03 appears after 30 seconds 3 Duplication of indoor unit number After turn ON by remote control switch see Alarm Code 35 Twin Type Only Normal ae e Case 1 The outdoor unit s on board 7 segment LED display is not indicated 2 The outdoor unit s on board 7 segment LED display indicates as follows if there is something wrong A The indoor unit s are not f supplied with power gt continues to flash after 30 seconds pc B Disconnection of the ee operating line between the gt continues to flash after 30 seconds outdoor and indoor unit s C Duplicated settings of the indoor unit number DIP switch DSW1 Refer to the description of i alarm code 35 in the item 1 2 2 Troubleshooting by Alarm Code Twin Type Only i HITACHI TROUBLESHOOTING 1 1 4 Failure of Power Supply to Indoor Unit and Remote Control Switch O Lights and LCD are not Indicated O Not Operated If fuses are melted or a breaker is activated investigate the cause of over current and take necessary action Action Phenomenon us heck Item Po
95. ng 35255 Refrigerant Flow Direction Heating PERSA Field Refrigerant Piping E Flare Connection t Brazing Connection Mark Part Name 1 Compressor 2 Heat Exchanger 3 Receiver 4 Micro Computer Control Expansion Valve 5 Reversing Valve 6 Strainer 3 8 7 Distributor 8 Check Joint 9 High Pressure Switch for Protection 10 Stop Valve for Gas Line 11 Stop Valve for Liquid Line 12 Pressure Switch for Control 13 Strainer 5 8 14 Heat Exchanger 15 Distributor 16 Strainer 17 Micro Computer Control Expansion Valve 18 Sub Cooler REFRIGERANT CYCLE 8 2 REFRIGERATION CYCLE TWIN TYPE Outdoor Unit RAS 5HVRG Indoor Unit RCI 2 5FSG2Ei bb UL 288 Du p l Doe fe to a f ji 01 g 10 lan Indoor Unit RCI 2 5FSG2Ei DI 2 a a Mi ai E d E 7 a Si i A rol To ko Sede 45 t__ Refrigerant Flow Direction Cooling a Cais Refrigerant Flow Direction Heating q OS 17 Mi RARAS Field Refrigerant Piping Flare Connection S y TES H Brazing Connection Ma
96. ning Current A Returns to Temperature Indication Temperature Indication This is an indication for internal information This is an indication for internal information This is an indication for internal information for the remote control switch This does not have any specific meaning This is an indication for frequency of inverter The capacity of the indoor unit is indicated as shown in the table below Capacity Code of Indoor Unit Indication Code Equivalent Capacity HP A In case of Twin Type it is indicated P02 J3 01 to 16 01 when shipment DSW4 Decimal Indication J4 00 to OF 00 when shipment DSW4 Indication with 16 numbers The indication of 255 is normal The current is indicated when compressor is running In case of inverter compressor the running current of primary side of inverter is indicated HITACHI TROUBLESHOOTING 2 Contents of Check Mode 2 The latest data of the first three indoor units only connected serially are indicated when more than three indoor units are connected to one remote control switch By pressing the A part of TEMP switch the next display is indicated If the V part of TEMP switch is pressed the previous display is indicated Indication of Category Code Indication of Temperature etc Temperature Indication Indoor Unit Intake 1 Air Temp at Thermistor C Correspond to check mode 1 Indoor Un
97. nit PCB Is superheat value Superheat under under 10 degrees C 10 degrees C V Yes Yes Heating E gt Heating Operation Is the connection on No indoor unit PCB and He connector intermediate connector propeny for expansion valve connected properly V Yes Does outdoor No fan motor operate ne Replace outdoor fan motor correctly V Yes No Is refrigerant E gt Charge correct refrigerant correctly charged volume Sy Yes Yes f Repair leaks of gas 2 gas leaking gt Correctly charge refrigerant y Remove the cause of short path of discharge air to the air intake of the outdoor unit HITACHI ver TROUBLESHOOTING Action Ref Cycle is Different from Check ref cycle and ee the Electrical System the electrical system Repair wiring Measure pressure Overcharged Refrigerant Refer to Figure in es lee Test Run of TCII 9 Check ex valve Replace ex valve FAU EX VAVE Refer to 1 3 3 4 if faulty Replace PCB and Decrease of check operation Replace PCB if faulty A Gas Faulty PCB P Disconnected Repair with Wires for Ex Check connections e caja ll Valve Control i pyme Faulty Discharge Incorrect Check e state E a mount Gas Mounting e to page 1 29 E a Thermistor repes comentar looseness oe a Check connecions connections repes comentar connector or repair connections 1 28 HITACHI TROUBLESHOOTING Alam PM Excessively High Discharge Ga
98. nomenon Indoor Heat Load is Greater than Cooling Capacity Calculate heat load Use a bigger unit Gas Leakage Correctly charge or Shortage Measure superheat refrigerant after of Refrigerant repairing gas leakage Excessively Small Diameter Tube or Long Piping Measure and check field supplied pipes Use correct pipes Incorrect Activation of Check Valve of Outdoor Unit Check whether or not temp difference exists before after check valve Check for clogging Remove clogging Check for connection Failure or Malfunction Is there operation Valve Is thermistor on Is thermistor installed correctly on Correctly install it compressor Check temp difference Replace check valve for outdoor unit Insufficient Cooling Operation Excessively Low Suction Pressure Clogged Strainer in Indoor Unit Clogging at Low Pressure Piping Clogging at Low Pressure Check temp difference Remove clogging Piping isi Check for clogged pae Indoor Unit Heat Check for obstacle at Exchanger inlet or outlet Remove obstacles Excessively Insufficient revolution Low Air of indoor unit fan motor Replace fan motor Temp to Indoor Unit Heat Check short circuited Remove cause of Exchanger indoor unit air short circuited air Replace strainer in indoor unit at inlet and outlet of strainer mz HITACHI TROUBLESHOOTING 1 1 6 Abnormalities of Devices Tum of i swe Check clogging of outd
99. ol 00 Control by Indoor Thermistor for Suction Air 01 Control by Thermistor of Remote Control Switch 02 Control by Average Value of Indoor Thermistor for Suction Air and Thermistor of Remote Control Switch 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 thermistor of remote control switch is not used set at 00 In case that room thermostat is not used set for input signal actually used If no signal is used set at 00 3 Even if controllers are normal the compressor does not operate under the following conditions Indoor Air Temp is lower than 21 C or Outdoor Air Temp is lower than 5 C during cooling operation Indoor Air Temp is higher than 30 C or Outdoor Air Temp is higher than 23 C during heating operation When a cooling or heating operation signal is given to the outdoor unit and a different mode as heating or cooling operation signal is given to indoor units When an emergency stop signal is given to outdoor unit HITACHI TROUBLESHOOTING 1 1 6 Abnormalities of Devices Action p Failure of Failure of Thermistor Discharge Check thermistor by Replace or correctly connect wiring when it is abnormal Replace if failed Check it by self checking 1 Replace if PCB is failed Air Temp Disconnected self checking 2 Thermistor W
100. on Check wiring to PCB connections Replace PCB and Faulty PCB Replace PCB if faulty i HITACHI TROUBLESHOOTING Alarm Yi Activation of Protection Device for Indoor Fan Motor Code ll except RCI Model O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm code is indicated when the temperature of the internal thermostat for the indoor fan motor is higher than 130 C y Yes Is continuity present No No Is fan motor hot Replace the motor at the internal thermostat of indoor fan motor Yes 0 Is connection bad at the connector No Does the indoor fan run No cono connections Yes No IN Replace the motor Is the coil resistance of fan motor normal Yes Check indoor temperature If it is unusual take suitable action to reduce it Action Faulty Indoor Unit Measure coil Fan Motor resistance and Replace motor if faulty insulation resistance Fee Check continuity after a fan motor temperature o pl motor if or merma decreases to room temp y Thermostat for Indoor Unit an a Fan Motor oe Insufficient Measure resistance Correct looseness Thermostat Contacting by tester Replace connectors Incorrect F HITACH
101. oor unit heat Remove clogging exchanger a Obstacles at inlet or Insufficient outlet of outdoor unit Remove obstacles Air Flow to heat exchanger Outdoor Unit Heat Is service space for Exchanger outdoor unit sufficient Correct fan speed Replace fan motor Excessively Short Circuited Air Remove cause of High Air to Outdoor Unit short circuited air Temp to Outdoor Unit 5 Heat Any Other Heat Load Exchanger near Outdoor Unit E ivel a Check expansion valve Correctly charge on y Refrigerant opening refrigerant Non Check each tem Charge refrigerant Condensed and pressure eet raciin umpin Gas in Cycle p i ial ima Clogging of Discharge Check for clogging Remove clogging Piping Check for clogging Remove clogging Check for connecting Failure or Malfunction Is there operation Valve Is thermistor on Is thermistor installed correctly on Correctly install it compressor Check temp difference Malfunction or Internal f at inlet and outlet of Replace 4 way valve aia ti A 4 way valve Discharge Pressure Insufficient Cooling Operation Excessively Maliuncton Check temp difference E or Internal Low Suction Leakage of between inlet and Replace 4 way valve Pressure 4 Way Valve outlet of 4 way valve Check for expansion Replace failed rele ol ct 6 valve of indoor unit in expansion valve of the same system indoor unit HITACHI 1518 TROUBLESHOOTING 1 1 6 Abnormalities of
102. open stop valve not in Operation Check oa ae MS Fuse ENS lace it if faulty Indoor Fan MN EA oe cee Faulty Pressure Switch Replace it if faulty Stoppage RPK Only Re place new PCB me Failure of PCB and check Replace it if faulty HITACHI 1 41 TROUBLESHOOTING Heating Overload High Pressure Switch will be Activate This alarm code is indicated when the protection device is activated at following condition Liquid refrigerant piping temperature of indoor unit is more than 55 degree and top of compressor temperature is more than 95 degree No IsCMC ON gt ye Is CMC ON more than 3 seconds y Check the following value by remote control switch 1 Top of Compressor Temperature 95 C or less 2 Liquid Refrigerant Piping Temperature of Indoor Unit 55 C or less Is the voltage between PCN9 1 and 3 220V 240V No Faulty PCB1 Is protection device activated No Faulty PCB1 Yes If exceeding the above value repair it Action Clogging of Heat Exchanger Remove it Check for dust on High Pressure Switch due to Insufficient Air Flow Check for any obstacle Excessively to Heat Exchanger at inlet or outlet of Remove it High Discharge of Indoor Unit heat exchanger Pressure during Heatin Opeon Check the service space Check for fan speed Cooling Outdoor Fan o fan motor Heating Indoor Fan y 1742 HITACHI TROUBLESHOOTING Action Red
103. or EE Abnormal After 3 seconds voltage check will be performed After 3 seconds 7 segment indicates AA Normal or EE Abnormal After 3 seconds automatically indicates 5 4 3 Count Down Depress A before 0 is appeared If the temperature setting become 25 deg and all the LEDs are turned OFF initial condition is set 2 3 4 5 6 7 8 9 2 O TEMP Ai REI T HIGH MEDIUM LOW HITACHI HITACHI a FIELD WORK INSTRUCTION 4 2 Alarm 36 Question and Answer for Field Work Example 2 Alarm 36 Phenomenon Alarm code 36 appeared and the system didn t operate Cause Combination of the indoor unit and outdoor unit was wrong Countermeasure Check an applicable unit model code as shown below Outdoor Unit Indoor Unit lt DC Inverter UTOPIA gt lt SET FREE gt RAS HVRG X gt FSG2E lt SET FREE FSG 1 and FXG 1 gt lt DC Inverter UTOPIA gt RAS FSG 1 RAS FXG 1 XA j HRS O Applicable X Not Applicable a HITACHI FIELD WORK INSTRUCTION 4 3 Select Guide of Drain Pipe for Indoor Unit O Selecting Method of Drain Pipe Diameter lt Step 1 gt Calculation of Drain Flow Volume Calculate from that the drain flow volume is approximately 3 hr per 1HP of the indoor unit nominal capacity For Example Common drain pipe for four 2HP indoor units and four 2 5HP indoor units 1 Total Horse P
104. or Liquid Line Sisa Spates Valve or Gas Line Sisa Spates Valve are eckson vales eckson vales valves Fuly open stop va open stop Fuly open stop va not in Operation Check is Melted Fuse EN lace it if faulty Indoor Fan vere A e nenaconnnun Stoppage RPK Only Replace new PCB me Failure of PCB este et Replace it if faulty HITACHI ae TROUBLESHOOTING Alam J NM Activation to Protect System from Excessively Low Suction Pressure Code q l Protection from Vacuum Operation O RUN light flickers and ALARM is indicated on the remote control switch The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB In the case that the evaporating temperature Cooling Liquid Refrigerant Piping Temp of Indoor Unit Heating Evaporating Temp of Outdoor Unit is lower than 35 deg retry operation is performed 3 minutes after compressor stoppage However when the state occurs more than 3 times including 3 in one hour this alarm code is indicated Is the thermistor THM8 No of outdoor unit connected ED Connectit to PCB1 ake Is the thermistor THM3 No of indoor unit connected lt gt to PCB F Is resistance of THM3 No and THM8 between gt Faulty thermistor 0 24kQ and 500kQ Yes No is gas leaking gt y Yes Repair leaks of gas Action Faulty Freeze
105. ort circuited air Check for other Measure discharge pressure Check continuity after decreasing of pressure Faulty High Pressure Insufficient Measure resistance Repair looseness Switch Contacting by tester Replace connector Incorrect Incorrect Connection Faulty Faulty Pressure Switch Replace it if faulty Check wiring Repair connections Replace Magnet Switch Magnet Switch Malfunction A Contact gt Check connections Measure resistance Faulty of Outdoor Fan Motor gt between wires and Replace it if faulty Insulation resistance Activation Faulty of Internal Thermostat Thermostat of Outdoor Faulty of Fan Motor Internal Lala al Thermostat enact Incorrect Connection Measure continuity after fan motor temperature Replace it if faulty decreases to room temp Correct looseness Replace connectors Measure resistance by tester Check connections Repair connections ae HITACHI TROUBLESHOOTING Check for clogging Remove clogging Check connecting Faulty or Malfunction of Check operating sound Check discharge gas Replace thermistor ee of Check attaching ent Sey state of discharge Reattach thermistor WEN oe te gas thermistor Excessively High Discharge Check evel T Pressure eck cycle operating i Overcharged Refrigerant temp and expansion teks refrigerant valve opening y Mixture of Non Condensable Check ambient temp Recharge refrigerant Gas in Refr
106. ower of Indoor Unit 4K 2HP 4X 2 5HP 18HP 2 Total Drain Flow Volume 18HPX 3 hr HP 54 hr lt Step 2 gt Select Drain Pipe from Table A and B 1 Horizontal Common Pipe with Slope 1 50 VP30 for above Example 2 Horizontal Common Pipe with Slope 1 100 WP30 for above Example 3 Vertical Common Pipe VP30 for above Example Table A Permissible Drain Flow Volume of Horizontal Vinyl Pipe Inner Diameter Permissible Flow Volume hr JIS Symbol NOTE mm Slope 1 50 Slope 1 100 VP20 Not Applicable to VP25 Common Pipe VP30 VP40 o Common Pipe VP50 Table B Permissible Drain Flow Volume of Vertical Vinyl Pipe JIS Symbol Inner Diameter Permissible Flow Volume NOTE mm 2hr vP20 20 220 Not Applicable to VP25 Common Pipe VP30 V40 1 440 VP50 2 760 Applicable to Common Pipe VP65 5 710 VP75 8 280 O Drain Piping Incorrect Drain Piping Connection 1 25 to 1 100 Down Slope Correct Common Drain Piping This drain pipe shall be separating from other pipes HITACHI as FIELD WORK INSTRUCTION 4 4 Maintenance Work 1 For Indoor Unit and Outdoor Unit a Fan and Fan Motor O Lubrication All fan motors are pre lubricated and sealed at the factory Therefore no lubricating maintenance is required O Sound and Vibration Inspect for abnormal sound and vibration O Rotation Inspect for clockwise rotation and rotating speed O Insulation Inspect for electrical insulation
107. p is flickering 2 To trace back the cause of trouble after restarting from NS i Ll lor LE iii E RUN CHECK stoppage with the RUN lamp flickering a To check during normal operation or stoppage 4 To monitor the temperatures of intake and discharge air ea k Check Mode 1 Current data will be displayed k Mode 1 C t data will be displayed OO O ec ec ode urrent data WI e Check Mode 1 Current data will be displayed aye A Y VENTI LOUVER ea OOO YA Check Mode 2 Data held A a before failure will be A a NormalMode Mode bel NOTES Press for more 0 Indication will delay as transmission between the remote control switch and indoor unit takes about 10 seconds O All data may be displayed as FF or 1 or 255 These transient data produced temporarily by software do not affect device functions at all The alarm code may also be indicated as FF O If it is not indicated check mode 1 it has possibilities that the transmission between remote control switch and indoor unit is not collect than 3 seconds Alarm code identifying the last fault that has occurred in Unit Number and i the indicated unit Alarm Code Displayed NG a Unit number of connected unit or unit number for which checking mode was selected previously Forward Press the A switch to rise from 00 to 01 to 02 O Backward Press the V switch to descend from 15 to 14 to 13 Per
108. pace Suction Process Fixed Scroll Discharge Process Compression Process oe 3 4 3 Structure Suction Pipe Suction Fixed Scroll Discharge Pipe Discharge Frame Motor 8 HITACHI MAIN PARTS 3 5 Thermistor 3 5 1 Thermistor for Indoor Unit 1 Position of Thermistor In Case of 4 Way Cassette Type Thermistor for Indoor Heat Exchanger Gas Pipe Temperature THM5 Thermistor for Air Outlet eE ag oe N For Freeze Protection THM3 2 Thermistor for Indoor Suction Air Temperature For Room Temperature 90 Control go K The room temperature is controlled by the 70 thermistor for indoor suction air ae al temperature detecting the temperature at Thermistor 59 ss the suction air inlet of the indoor unit aS ae The setting temperature is indicated on the 30 S ye L C D of the remote control switch by Be 205 number 2d Sho y Adjust the setting temperature for i a es prevention from excessive cooling and 15 10 5 0 5 10 15 20 25 30 35 40 45 50 55 60 heating 3 Ambient Temperature C It is recommended to set the temperature Thermistor Characteristics as follows Economical Cooling Operation 27 C to 29 C Economical Heating Operation 18 C to 20 C The resistance characteristics of thermistor is shown in the above figure ATTENTION The thermo off value of the indoor unit
109. plate and turn the one toward the front side NOTE Check to ensure that LED201 Red is OFF when turning the power plate b Disconnect the PCN6 on the PCB1 of the electrical box c Remove the coil for the reversing valve after removing the fixing screw 1 piece RAS 5HVRG a Remove three 3 screws fixing the power plate and turn the one toward the front side NOTE Check to ensure that LED201 Red is OFF when turning the power plate b Disconnect the PCN6 connector on the PCB1 of the electrical box c Remove the coil for the reversing valve after removing the fixing screw 1 piece Phillips Screwdriver RAS 3HVRG and 4HVRG RAS 5HVRG Reversing Valve Electrical Box Upper Cover Reversing Valve P Attaching y Plate Remove f PCN6 Screws Upper Cover PCN6 Fixing Screw for Wh Reversing Valve Coil Electrical Box Remove Screws Reversing Valve Coil Compressor Reversing Valve Coil Fixing Screw for 4 Reversing Valve Coil Compressor ISPM LED201 Red LED201 gt SS 4 Act Module Magnetic f Z Capacitor Contactor Sq Be Power Plate Reactor In Case of 3HP and 4HP In Case of 5HP 20 HITACHI SERVICING TURN OFF all power source switches 2 1 8 Removing Coil for Expansion Valve A DANGER Do not touch the electrical parts when LED201 Red on the ISPM is lit to prevent from an electrical shock 1 Remove the service cover accord
110. r NOT GOOD ditto GOOD or NOT GOOD ditto GOOD or NOT GOOD ditto GOOD or NOT GOOD by Viewing or Air Flow Volume GOOD or NOT GOOD higher than 220V GOOD or NOT GOOD Check fan compressor piping GOOD or NOT GOOD etc Check activation of COOL HEAT STOP and TEMP switches GOOD or NOT GOOD Check actual activation value GOOD or NOT GOOD Check it during cooling operation GOOD or NOT GOOD C DB C WB C DB C WB C DB C WB C DB C WB DONE or NOT YET DONE or NOT YET DONE or NOT YET Does drain water smoothly flow wo Check for leakage at check valve Check for leakage at liquid tank Check for leakage at strainer Check for leakage at electronic Ex Valve Check for leakage at piping Check direction of fans Voltage among each Phase 24 Vibration and Sound 25 Activation of Each Operation Mode High Pressure Cut out Switch Check activation of drain mechanism ndoor Inlet Air Temp DB WB Indoor Outlet Air Temp DB WB utdoor Inlet Air Temp DB WB utdoor Outlet Air Temp DB WB Operating Voltage OJO wm Operating Current Instruction Cleaning of Air Filter to Client Instruction for Cleaning Method to Client 6 Instruction for Operation to Client m EA HITACHI A Specifications in this catalog are subject to change without notice in order that HITACHI may bring the latest innovations to their customers Hitachi Air Conditioning Systems Co Ltd Catalog No
111. r for Indoor Fan Y52H Relay for Electric Heatrer MV Micro Computer Control Expansion Valve Terminals ERs ram Code Board kxt Close end Connector rinted Circuit Boar va RCS Remote Control Switch a E re Supplied RSW Indoor Unit No Settings fp PETT Earth Whine SSW Slide Switch Facey Wi TB Terminal Board y g 7 8 ELECTRICAL WIRING DIAGRAMS 7 7 ELECTRICAL WIRING DIAGRAM FOR MODELS RPK 1 5 2 0FSG2M Connector for 240V CNE7 TEn ol Inlet Outlet Liquid Gas Conector 240V 3 12V for 220 eS 220V l TeV as Ca ANY Wienis4 AW 1 Hz ME pS IN INe SN fe p s UNS Sig B or geoes Pa0v 60lz AE HH l Bza Go PCB E ep 55 055655 obbo E 4 TB FF LS CN17 CNee HM1 THM2 THM3 THMS oe e MI CN26 CN3 CN4 CN6 CN7 CN8 CN303 HA PSW301 LIR Ekel poy eee o EFea pa O rN CN28 Le i PCN7 o CN11 A ina L CN25 iat c ma 00 0 mae oo f ace ss 35494 S N33 2088858
112. resistance b Heat Exchanger O Clog Inspect and remove any accumulated dirt and dust from the heat exchanger at regular intervals As for outdoor unit other obstacles such as growing grass and pieces of paper which might restrict air flow should also be removed c Piping Connection Leakage Inspect for refrigerant leakage at piping connection d Cabinet O Stain and Lubrication Inspect and remove any stain and lubrication O Fixing Screw Inspect and fix loosened or lost screws O Insulation Inspect and repair peeled thermal insulation material on cabinet e Electrical Equipment O Activation Inspect for abnormal activation of the magnetic contactor auxiliary relay PCB and etc O Line Condition Pay attention to working voltage amperage and phase balance Inspect for faulty contact caused by loosened terminal connections oxidized contacts foreign matter and other items Inspect for electrical insulation resistance f Control and Protective Devices O Setting Do not readjust the setting in the field unless the setting is maintained at a point other than the point listed in 9 SAFETY AND CONTROL DEVICE SETTING of TCII 2 For Indoor Unit a Air Filter O Cleaning Inspect and remove any accumulated dirt and dust according to Common Chapter 1 2 Filter Cleaning of TCI b Drain Pan Drain up Mechanism and Drain Pipe O Drain Line Inspect and clean the condensate drain line at l
113. rg NF Noise Filter Earth Wiring LEDi 3 Alarm Code Factory Wiring 7 4 ELECTRICAL WIRING DIAGRAMS 7 3 ELECTRICAL WIRING DIAGRAM FOR MODELS RCD 4 0 5 0FSG2 F 220V S0Hz Main 220V S0HzZ Field Connection Connector for 240V 240V Conector 20V Fe 95 we INLET OUTLET FREEZE for 220 jev m m GAS cNe7 i 2 PROTECTION 3 is 1 PCB o peni po CN cni7 8900668 chif 88059 CE ee Bao i THM 2 THMs THMs THMs PCNZ YHe f 1 A ai O fof EFS f Alarm HA N lt CN3 CN4 CN7 CNB E D en ff HE Pes cNl2 PCN4 PCNe CNI925 PCN3 CNI3 o o oo o PONS 0 o PJPEN6 CN14 e ejena Fr Jj ir 7 1 2 CN31 1 2 CN30 e e E MD ES TBe 190 030 39 PCBe PCN203 PCN201 PCB3 PCN202 PC PC 301 302 PCN204 CN 201 O NOTE Ie PC P1HE ing
114. ri i ER ER EE EE EEE 2 1 2 1 3 Removing Outdoor Fan r r a aar a ar r a T E aa a Ea AE E RE S E R E a 2 2 2 1 4 Removing Outdoor Fan Motor soiree adira eraa a e ERa E EO ER aE a EEE EEEE 2 2 2 1 5 Removing COMPFeSSOF rnice an eer e E EE N aa aE AEE E REE E EE rR EA 2 3 2 1 6 Removing High Pressure Switch and Pressure Switch for Control ccceeeeceeeeeeeeeeeeeees 2 5 2 1 7 Removing Coil for Reversing Valve cccccccceceecceeeeeeceeeeeeaceeeeeeeeeeeceaeeesecceeeeeeeeeeeesseeeesseeeteees 2 6 2 1 8 Removing Coil for Expansion Valve cccceceeccceeeeceeeeeeeeeeeeeeeeeeeccaeeesecneeeeeeeceeeesssseeeseneeeeaaes 2 7 2 1 9 Removing Printed Circuit Board PCB1 cccccccceeecceeeeeeceeeeeeeeeeeeeaceeseeeeeeeeeeeeeeseseeeeseeeeeeeaes 2 8 2 1 10 Removing ISPM and ACT Module ccccccceceeeceeeeeeeeeeeceeeeeeeceaeeeeceaeeeseceaeeeeeeeeeeeeceeeeseneeeeeses 2 9 2 1 11 Removing Electrical Component ccccccceeeecceeeeeeceeeeeeeeeeeeeaeeeeceaeeeeeceaeeeseeceeeeeeneeeeseneeesaees 2 11 2 2 Indoor Unit Refer to Service Manual P5413553 CONTENTS No Page 3 MAIN PART S 000 at ai 3 1 Se O 3 1 3 1 1 Specifications of Inverter ecccceceececceeeeceeeeeeeeeeeeeeeeeeecaeeeeseceeeeseeaeeeeeceeesecceeeesesaeestieeesesneeees 3 1 3 1 2 Arrangement of Inverter Power Unit cccccccceeeecceeeeeeceeeeeeceeeeeeaeeeeeeeaeeeeeeeeeeeeecneeeesesneeeeseneees 3 2 32 AC GRODDEM sssini ea ae
115. rk Part Name 1 Compressor 2 Heat Exchanger 3 Receiver 4 Micro Computer Control Expansion Valve 5 Reversing Valve 6 Strainer 3 8 7 Distributor 8 Check Joint 9 High Pressure Switch for Protection 10 Stop Valve for Gas Line 11 Stop Valve for Liquid Line 12 Pressure Switch for Control 13 Strainer 5 8 14 Heat Exchanger 15 Distributor 16 Strainer 17 Micro Computer Control Expansion Valve 18 Sub Cooler 19 Branch Pipe TE 56
116. rmer and GND of PCB1 12V 10 Remove CN201 on PCB2 Is fan motor Yes Is the voltage between CN201 3 Speed control command ES Faulty and GND1 more than 1V Replace to fan motor Fan Motor Fan Motor correctly y Is the voltage between GND of PCB1 and PC1 2 of PCB2 Yes several voltage E gt Faulty PCB2 gt Replace PCB2 PCN202 Is pulse signal to PCB2 correctly y Faulty PCB1 Replace PCB1 Electrical Box o CN201 CN201 3 CN202 PCB1 CN19 Transformer Ta HITACHI TROUBLESHOOTING Alarm AN Abnormality of Thermistor for Discharge Gas Temperature Code JL Lf Compressor Thermistor O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the unit No and alarm code are indicated on the display of the outdoor unit PCB This alarm code is indicated when the thermistor is short circuited less than 1 kQ or cut greater than 6 MQ during the cooling or heating operation No Is the thermistor connected R Ti f THM9 da s resistance o y between 1kQ and 6kQ Faulty Thermistor oe Faulty PCB Replace thermistor Compressor Thermistor ra Repair wiring and Incorrect Connection Check wiring to PCB1 connections R
117. s Outdoor Unit g parts not operated Fan Motor ex i i Measure resistance The indoor 3 outdoor ane Failure of Comp Motor beween IWO NIES gt or compressor does not operate Check for abnormal Failure of Comp sound from comp Failure of Magnetic Insufficient Switch for Contacting Comp Replace PCB for outdoor unit Replace compressor Check magnetic switch activates correctly or not Replace magnetic switch Disconnected Wiring to Failure of PCB One of PCBs Failure of Check PCB by Replace PCB PCB self checking 1 if failed Correctly connect Check connections wiring Failure of Failure of Thermistor Air Inlet The Comp Thermistor Disconnection does not Stop of Thermistor or Start even if the Setting temperature Abnormality of Remote on LCD is Control Switch Cord Changed A Check it by Replace PCB if Failure of Indoor Unit PCB gt self checking 1 failed Check it by BCE MOAS B Replace or correctly connect wires if abnormality exists Check it by Test Run HITACHI 1 9 TROUBLESHOOTING 1 1 6 Abnormalities of Devices en Incorrect Optional Setting The Comp does not Stop or Start even if the Setting temperature on LCD is Changed Incorrect Input Output Setting 1 Refer to Item 1 3 1 2 Refer to Item 1 2 3 Check Setting Condition of Thermistor of Remote Control Switch by Optional Setting Setting and Contr
118. s Temperature Code LIU at the Top of Compressor Chamber O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB This alarm is indicated when the following conditions occurs three times within one hour 1 The temperature of the thermistor on the top of the compressor is maintained higher than 127 C for 10 minutes or the temperature of the thermistor on the top of the compressor is maintained higher than 140 C for 5 seconds during cooling 2 The temperature of the thermistor on the top of the compressor is maintained higher than 120 C for 10 minutes or the temperature of the thermistor on the top of the compressor is maintained higher than 140 C for 5 seconds during heating Thermistor on Top of Compressor No of compressor good Faulty Thermistor See page 1 35 for the Fa thermistor resistance Is the thermistor No installed correctly Install it correctly on the compressor Yes Yes Is gas leaking C Repair leaks of gas y Recharge refrigerant HITACHI 1 29 TROUBLESHOOTING Alarm ll Abnormality of Thermistor for Indoor Unit Inlet Air Temperature Code ll Air Inlet Thermistor O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit co
119. sistance If all the resistances are from 1 to 5 kQ it is normal d By touching the side of the tester to the L2 terminal of ACT module and the side of the tester to the terminal of ACT module measure the resistance x pi If all the resistances are from 50 to 200 kQ it is Y normal JS ls HITACHI TROUBLESHOOTING L2 e By touching the side of the tester to the L2 terminal ar A of ACT module and the side of the tester to the AA a E de terminal of ACT module measure the resistance SE aq if i om If all the resistances are greater than 100 KQ it is ear normal f By touching the side of the tester to the terminal Apr A of ACT module and the side of the tester to the AA gt gm y D terminal of ACT module measure the resistance YI l ES i gt MEA If all the resistances are less than 100 KQ it is e7 E normal 4 Checking Method of Electronic Expansion Valve Indoor Unit Electronic Expansion Valve Outdoor Unit Electronic Expansion Valve Locked Check for the liquid pipe temperature It is abnormal if the liquid pipe pressure with during
120. t is indicated the half value of actual frequency Discharge Gas e Temperature on the Top rf of Compressor HITACHI 1 59 TROUBLESHOOTING from Previous Page Checking Item PSW3 PSW2 Checking Contents E J 10 Antion Ar Temperatur Pa T 19 to 80 C Refer to page 1 61 YE oomnero In case that temperature is higher than 100 C two digits flicker 19 Open Circuited 27 Short Circuited Flicker Inner Data of Outdoor Unit s PCB lt gt Running Current of lt p gt PSW3 PSW2 r lt gt Indoor Unit Expansion s Valve Opening rc PSW2 PSW3 E 00 to 100 lt p gt PSW3 PSW2 is higher than 100 two digits flicker as 4910 127 0 Indoor Unit Intake 1 2 o lt p gt 18 Indoor Unit Discharge Air Temperature In case that expansion valve opening Indoor Unit Heat Exchanger 16 Liquid Pipe Temperature n Freeze Protection a am Indicates 19 when below 19 C lt gt Indoor Unit Cause Refer to page 1 55 of Stoppage _ It Lt Lf 1 i 19 to 127 C Return to start ft lt gt 150 HITACHI TROUBLESHOOTING 1 2 5 Protection Control Code on 7 Segment Display 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 prior
121. tdoor ter E Transmission of Inverter Unit 1 Seconds PER High Pressure Sensor Comp Discharge Gas Temp Thermistor Abnormality 3 Low Pressure Sensor Heat Exchanger Evaporation Temp Thermistor After Contents Ambient Air Temp Thermistor 1 Seconds Li means that automatic PCB checking is operating to next page NOTE In case of J2 indication directly J7 is not indication it is not abnormal When the indoor unit of RPK series is using wireless remote controller PC LH3 the above check is used by PC P1H and operate according to below items 1 Turn OFF of Power Supply 2 Disconnect CN25 on PCB M 3 Connect the Connector of PC P1H to CN12 or CN13 4 Turn ON of Power Supply After checking turn OFF again and reconnectable perform the procedure in reverse 1764 HITACHI TROUBLESHOOTING gt from previous page CHECK In ERA gt that there is a second unit pa lt Self checking Indication of the Next Unit gt Press ex Repetition of Self checking of Unit No 0 a of Unit No 1 After 7 Seconds Resul LE After 1 to 5 Seconds J After 1 Second I u Be Repetition JN oe ae ee ene ae RESET Release PCB Check Mode NOTES If this indication is continued and J1 is not shown this indicates that each one of indoor units is not connected to the remote control switch Check the wiring between the remote control switch and indoor unit
122. ted at the A part is 99 the checking do not proceed to the next item Cancellation of EEPROM The LCD indication changes as shown below The LCD indication changes as After several seconds are passed shown below and the EEPROM is the remote control switch is automatically canceled by the automatically activated again remote control switch When the remote control switch is activated again the RUN indicator is ON and the operation is started Therefore depress switch and stop operation RUN STOP NOTES 1 In case that the operation is not automatically started when the remote control switch is activated again the detection circuit for momentary stoppage may be abnormal However it would not interfere the normal operation There is a case that the operation is automatically stopped after the automatic operation when the remote control switch is activated again HITACHI The LCD indication changes as shown below After several seconds are passed the remote control switch is automatically activated again In this case the operation is not started automatically 1 67 TROUBLESHOOTING 1 3 3 Procedure of Checking Other Main Parts 1 High Voltage Discharge Work for Replacing Parts lt Perform this high voltage discharge work to avoid an electric shock gt Procedure a Check to ensure that no high voltage exists If LED201 is ON after start up and LED201 is OFF after turning OFF the power so
123. th Abnormal Liquid Ref Check expansion valve a Sound from Compression Compressor Wear or Breakage of Internal Comp Parts Hamming Sound from Check surface of Replace magnetic Magnetic Conductor contacts switch Abnormal Vibration of Check each fixing ma Abnormal nd from bnormal Sound Replace compressor Inside of Compressor TIG HITACHI TROUBLESHOOTING 1 2 Troubleshooting Procedure O Alarm Code Indication of Remote Control Switch Indoor Unit Alarm Code Model Code Connected No Alarm Code Number of Indoor Units Indicated for a second alternately 1 2 1 Alarm Code Table Code Category Content of Abnormality Leading Cause ae A E High Water Level in Drain Pan Indoor Unit Tripping of Protection Device Activated Float Switch Outdoor Unit Tripping of Protection Device Activated High Pressure Switch Except Alarm Code 41 and 42 Locked Motor in Cooling Operation Incorrect Wiring Loose Terminals Abnormality between Indoor and Outdoor Disconnected wire Tripping of Fuse o o 2 Abnormality between Inverter and Control PCB Failure in Transmission of PCB for Inverter Voltage Dro Voltage Drop by Excessively Low or High Voltage Drop of Power Supply 9 p Voltage to Outdoor Unit Insufficient Capacity of Power Supply Wiring Decrease of Discharge Gas Superheat Discharge Gas SUPERHEAT less than 10 deg is maintained for one hour Cycle 01 02 03 07 Temperature of the top of Compressor Td Increas
124. through the accumulator decreasing compressor temperature O 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 In cooling operation the above function is also available a0 HITACHI MAIN PARTS d If compressor upper part temperature increases excessively the protection control is activated and the compressor is stopped according to the following method Upper Part Temperature of Compressor Defecting Period Cooling Over 127 C 10 minutes Continuously Over 140 5 seconds Continuously Over 140 5 seconds Continuously C Heating Over 120 C 10 minutes Continuously C Defrosting Over 120 C 5 seconds Continuously 3 Thermistor for Outdoor Ambient Temperature The thermistor resistance characteristics are shown in the figure below 4 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 90 82 80 70 61 60 Thermistor 5 Resistance KQ 40 46 35 30 27 20 16 12 5 10 8153 3 6 25 15 10 5 O 5 10 15 20 25 30 35 40 45 50 55 60 Ambient Temperature C Thermistor Characteristics HITACHI 3 11 MAIN PARTS 3 6
125. tor CN 25 201 Connector on PCB1 M and PCB2 DSW2 Factory fixed settings DSW3 Unit Capacity Code DSWs Refrigerant Cycle No DSW7 Fuse Recover Remote Controller Selector EF1 Fuse EFP2 Fuse EF4 Fuse EFs Fuse MIF Motor for Indoor Fan MS1 Motor for Automatic Swing Louver MS2 Motor for Automatic Swing Louver MV Micro Computer Control Expansion Valve PCB1 m Printed Circuit Board ELECTRICAL WIRING DIAGRAMS 7 9 7 8 ELECTRICAL WIRING DIAGRAM FOR MODELS RPF I 1 5 2 5FSG2E I RCS Connector 240V TF i ag for240V 220V Conector Inlet Outlet Liquid Gas for 22
126. uce heat load or Calculate heat load Check for hot air near E Excessively High Temp Make good circulation Air to Indoor Unit Heat Exchanger Check for short Remove circuited air short circuited air Check for other Measure discharge pressure Check continuity after decreasing of pressure Measure resistance Repair looseness by tester Replace connector Check connections Repair connections Check decreasing air flow volume at Faulty Pressure Switch Faulty High Pressure Insufficient Switch Contacting Incorrect Connection Faulty of Outdoor Fan Control Replace it if faulty Replace thermistor for evaporating temp if faulty pressure switch for control activative Activation of High Pressure Switch due to Check activated Replace it if pressure Excessively Ple A Cool pressure and switch for control is High Discharge connecting wire faulty Pressure during Heating Check cycle operating Charge refrigerant Operation Overcharged Refrigerant correctly Mixture of Non Condensable Check ambient temp Recharge refrigerant Gas in Refrigerant Cycle and pressure after vacuum pumping Clogging of Discharge Piping Check for clogging Remove clogging Check for clogging Remove clogging Check connecting Faulty or Malfunction of Check operating sound Aaatses vil Expansion Valve P Check Ee a gas Replace thermistor Check oo state of alerce Reatach ini thermistor gas thermist
127. urce the voltage will decrease lower than DC50V b Connect connecting wires to an electrical solder bit c Connect the wires to terminals P and N on ISPM gt Discharging is started resulting in hot solder bit d Wait for 2 or 3 minutes and measure the voltage once again Check to ensure that no voltage is charged Connecting Wires JLLED201 Plug Solder Bit P Pay attention not to short circuit between terminal P and N If it occurs short circuit it may cause a serious damage 1 68 HITACHI TROUBLESHOOTING 2 Checking Procedures ISPM Rectification Parts of Internal Circuit of ISPM Common P1 Remove all the terminals of the ISPM before check If items a to h are performed and the results of are satisfactory ISPM is normal Measure it mol under 1 kQ range of a tester Do not use a digital tester a By touching the side of the tester to the P1 terminal of ISPM and the side of the tester to R and S of amp oO Ls Oz 7 00 a i e BBY T ISPM measure the resistance If all the resistances of ToS are more than 100 kQ it is normal E a 00 SD PIN b By touc
128. ure o The AS motor 1 rotates the pinion 2 fixed to 2 Pinion the shaft of the AS motor 1 rotates the rotating 7X 5 Cover torque is changed at the rack 3 and the circular 6 Louver rf reciprocating force gives the driving force to the A louver 4 and rotates the louver 4 a Rank Y Tt 2 Auto Louver Stoppage Press the AUTO LOUVER of the remote control switch during auto louver operation The rack 3 touches the stopper of the cover 6 and the louver is reset to the O position The power supply for AS motor 1 is turned OFF when the louver is at the setting position The louver 4 is stopped at the setting position HITACHI ot MAIN PARTS 3 4 Scroll Compressor 3 4 1 Reliable Mechanism for Low Vibration and Low Sound 1 The rotating direction is definite 2 The pressure inside of the chamber is high pressure and the surface temperature of the chamber is 60 C to 110 C 3 4 2 Principle of Compression 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 gt Compression Discharge is repeated continuously Rotating Scroll Compression S
129. utdoor Unit Check connections Correctly connect wires Faulty PCB Outdoor Unit Indoor Unit Check continuit Replacing Wires and looseness f Repairing and Incorrect Wiring connection screws Tightening Screws SW1 Setting and CN2 Connection Check terminal Nos Incorrect Power Supply Circuit of PCB1 1 24 HITACHI TROUBLESHOOTING i i F Abnormal Transmitting between Inverter and Outdoor PCB1 O RUN light flickers and ALARM is indicated on the remote control switch O The unit No alarm code and the unit code is alternately indicated on the set temperature section and the alarm code is indicated on the display of the outdoor unit PCB1 This alarm is indicated when abnormality is maintained for 30 seconds after normal transmitting between the outdoor unit PCB1 and ISPM and also abnormality is maintained for 30 seconds after the micro computer is automatically reset The alarm is indicated when the abnormal transmitting is maintained for 30 seconds from starting of the outdoor unit Disconnect CN6 of PCB1 No flickering Faulty PCB1 Yes Connect CN6 of PCB1 No Faulty ISPM Tere PC gt rect wit flickering Incorrect wiring between ISPM and PCB1 Yes Faulty PCB1 F Faulty ISPM Does hae pod spoed become gt Disconnected wires or Insufficient Contacting between ISPM and Yes PCB1 No Normal ISPM check the wiring again HITACHI 125 TROUBLESHOOTING Excessively Low or Hi
130. wer Failure or Power is Not ON ger nea Supply power Short Circuit Supplied Check for any eee between Wires uncovered part of wires replace thefise Melted Fuse or Wires to Earth resistance replace the fuse Breaker at F Power Source Failure of Indoor Unit Measure resistance Replace the AC Fan Motor between wires and chopper for indoor fan insulation resistance fan motor and fuse Failure of AC Chopper Eee eee for Indoor Fan CNOPper OL NESE fan and fuse Short Circuit Supplied Check for any aa between Wires uncovered part of wires replace the fuse Melted Fuse Control Circuit to Earth resistance relace the fise at Control Circuit Measure resistance Replace the AC rd Unit between wiring and chopper for indoor fan insulation resistance fan motor and fuse Failure of AC Chopper ee ie td for Indoor Fan CN9Spper Jor ngoor fan and fuse Failure of Transformer at Indoor Unit Side e A Replace the transformer Disconnected Cable of Remote Control Switch Connect the cable T cape or Insufficient Connection or Incorrect Connection Insufficient of Indoor Unit PCB Contacting at Connectors of Check connectors Correctly connect it Remote Control Insufficient Connection Switch or Incorrect Connection of PCB in Remote Control Switch HITACHI ad TROUBLESHOOTING 1 1 4 Failure of Power Supply to Indoor Unit and Remote Control Switch Failure of Remote Faweornomowconoismen Switch mode 1 Incorrect _tnsrec
131. wingcomecton Connection 1 Refer to Item 1 3 2 2 Refer to Item 1 3 1 Failure of PCB 1 1 5 Abnormal Transmission between Remote Control Switch and Indoor Unit O RUN Lamp on Remote Control Switch Flickering every 2 seconds Action Disconnection or Insufficient Contacting of Check cable and Repair cable or Remote Control Cable connections connect it Check it by Replace it if remote Failure of Remote Control Switch self checking mode 1 control switch is faulty Disconnected Wire Correctly connect in Indoor Unit and Remote Control Switch Check it by ae Failure of PCB self checking mode 2 Replace PCB if failed 1 Refer to Item 1 3 2 2 Refer to Item 1 3 1 Las HITACHI TROUBLESHOOTING 1 1 6 Abnormalities of Devices 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 Action Coil resistance by tester Failure of Replace indoor unit Indoor Unit Fan Motor Burnt Out fan motor Coil Measure insulation resistance Measure coil resistance by tester Disconnected Failure of Coil Outdoor Unit Fan Motor Burnt Out Coil Replace outdoor unit fan motor Measure insulation resistance RUN light is ON and LCD Failure of is indicated Magnetic bk Measure voltage However the Switch for a between contacting system doe
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HITACHI UTOPIA SERIES INVERTER-DRIVEN SPLIT

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