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SERVICE MANUAL

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4. REACTOR PELO 5 3mH BROWN a i 2500 TERMINAL I i B zs t T ni ti pi P1054 FUSE Ut ys E L ___ LODS NORNAL COIL RL3 PORER RELAY zx gt C601 PH BOARD E 88 s D IM E ut 1 ui pu E agio 818 RL4 08602 D860 SSS p e E T ABSORBER 1 Tio R E USE CURRENT HELA ray t d J S 1 2 0602 S of ofc i Roos 2 toH 8 E a sec we D Pa T 1 os Ed ii E EJ is m dein 2 m 1 Stic afls ac 4 E 32 ere t 1 4 H R60
5. CN10 Control W 3 gt 121 5 Indoor Fan Motor gt LZ 4 TE _ ICP2 EE 35V eQ d E o o S PA 4P Top RED CN 15 Pk 11P To Tx ANS 4 0115 0113 Notice S 1 E 0121 i 12V pam e AC o z a 20 1 The kind of Copacitor as follows 8 e 10121 SIZ HUE nM c iu ST 1 IN QUT gt Hot ex 10111 ed S C Ceramics Capacitor D O gt GNE OV D Capacitor y RED E Ey x45 1 1 p im P xs o e p Cul Term rad Board TRES ara 2 The fixing form as follows e e e QV FORM I NEA AXIAL 4 24 cz 10P To RAD TAL CN3 7 H MANUAL XA 8P 1 C CHIP 3 op D 751 S OTHERS
6. T fs ae j MOTOR EX a VOLTAGE 5885 E _ 63 U 21 Bods JHK HK PK6P O e Fig 7 4 Power module circuit U is OFF V is ON Since current flows at point B only when U transistor and V transistor are ON the current waveform at point B becomes intermittent waveform as shown Fig 7 3 Since current at point B is approximately proportional to the input current of the air conditioner input current is controlled by using DC current Id detection resistor Reference If power module is defected self diagnosis lamps on the MAIN P W B may indicate as shown below Table 7 1 Self diagnosis lamp Self diagnosis And mede Blinks 2 times peak current cut LD301 Abnormal low speed Switching incomplete LD301 77 DC INPUT GAANA AANA AAN AA AI M AAA AAA AMAA DC NPUT LED 1230
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22. UBYM spuooes ynoge 10 8 pue 093 9 1039304 720 0 Nv4 Buipnjour SNIAJIGIINQH3G pue Nv4 ONILWAH 0 19 eq UBD Jejo41uoo eu m Z m 2 I 4907 NOl1VH3d0 O H 26 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAK 18PSPA RAK 25PSPA RAK 35PSPA INDOOR UNIT Unit mm Sa Top air suction grill 218 780 Mounting plate Front panel Cabinet 280 60 Li V Air outlet P Horizontal air diflector 190 400 190 A X When piping is drawn from the left side exchange the drain Y dX p 9 hose for the 60 19 3 IIT REEL Drain
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30. Over voltage is detected 1 P W B s compressor abnormal load 2 Compressor 1 P W B s This function is effective only once immediately after the power is turned on It will not work if you have performed another remote control operation beforehand Note also that it may function in response to a procedure other than the above If it does not work turn off the power turn it back on and repeat the procedure If the memory stores nothing performing a redisplay operation will not blink the lamp For a normal operation tum off the power and tum it back on After the above operation the product will not receive a remote control signal normally After clearing the troubleshooting data turn off the power If you do nottum off the power the product will become unresponsive to remote control signals OUTDOOR UNIT LD301 SELF DIAGNOSIS LAMP Check the drive circuit IPM using the PRD checker Check the position dE With the unit set in the operating fails wait 3 nes state press the cooling heativg for the unit to re dehvmidity button start and check the Does the unit operate for self diagnosis lamp approximately 2 seconds the status again LD301 coming on and then stop due to a failure of switching the lamp blinking 4 times sensor circuit Check the refrigerating cycle
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32. gage Thermistor 1 25 7 o T edo ducto X CERALOCK32 768KHz c 31 9607 225 35 35 sit st z iq 1 17 ENG 4 8305 1601 0 10 1 cous 66e PC911 ds 5 5 5 o CPU 12 65 y ov S 8 8 SSI 69 55 6524 16501 m EM Rb34 2611 c 1 1912 Zlo e FLASH WRITING PIN v Ei 127 Wired 5 2 1 rt R501 We UN USE R633 REC Remocon 9 CLOCK OSCILLATION AN SUPPLY ra 6857 OV AAAS SEND R545 iy E BL CIRCUITQUM4D FRUNTPANEL 4 1161 t gt ox Tm R50 0501 P27 56617 E dies CN6 5 n 1 i RONT 93 663 912 e H FLASH WRITING PIN FRONT PANEL 2 2 x e Rov T HIGH VOLTAGE OUTPUT FRONT PANEL 1 m gg 5002 Y MI O B R921 pe cs DISPLAY LAMP ret DS 66 Ae 0V OV 12 ENT Terminal for D R652 VOLTAGE DEFECTIVE DOOR FAN POWER 1 5V EEPROM data TX 198 R922 i co07 pas H LINK H LINK Hee H 9P Top A 608 met chs _ D 2 0 5 lt 2 2 Forcen 546 4 54 P Room Temp R549 03 193 8 s 5 93 cba 0831 R834 Test D ov R601 5V iL 64 amp 2 R831 R835 D O gt SE S Z la 3 8
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34. gt JOojoeuuoo pue eunjrej 5 9JIM YOOUD 15 re JosseJdui02 i sewn 10207 SO 88 SELF CHECK When self diagnosis lamp blinks 2 3 4 and 5 times happen to determine whether compressor faulty or electrical unit faulty please conduct a SELF CHECK as below Switch OFF main power supply Short circuit between JWOO1 JWOO2 Switch ON main power supply LD302 will blink 1 time Within 3 minutes Press Test Switch for 1 second or more Self diagnosis result will be shown 10303 will ON LIT and LD301 will be blinking Then refer to diagnosis table 2 6 Switch OFF main power supply Then release back JWOO1 and JWO02 to original condition no short circuit condition E elf step No 6 is not carried out the system will not operate properly until 3 minutes has lapsed after restore the power supply SELF CHECK diagnosis result SELF DIAGNOSIS LIGHTING MODE LIT BLINKING OFF JELF UIAGNOSIS RESULT REPAIR METHOD RED REDIRED ELECTRICAL CHANGE COMPRESSOR TIME DW PEAK CURRENT CUT OFF CHANGE P W B s 2 TIMES COMPRESSOR CONNECTOR LOOSE OR COMPRESSOR CURRENT CHECK CONNECTOR CONDITION 7 TIMES ABNORMA COMPRESSOR CONNECTOR OK UK COMPRESSOR CHANGE P WB s F AC VOLTAGE INPUT ABNORMAL OVER STANDARD VOLTAGE 10 DC VOLTAGE ABNORMAL
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48. CN15 by using a multimeter If there is pin with voltage that has not changed from 0 9V or 12V expansion valve or microcomputer is broken e Fig 5 2 shows logic waveform when expansion valve is operating Table 5 1 Drive status N OFF OFF OFF OFF OFF ON OFF ON ON ON oFF OFF OFF OFF ore OFF OFF OF ON ON ON OFF OFF Bu oF OFF oFF ON ON oN Operation mode 1 gt 2 gt 3 gt 4 5 6 1 8 VALVE CLOSE 8 gt 6 5 4 3 2 1 VALVE OPEN Connector pin no Fig 5 2 With expansion valve control opening degree is adjusted to stabilize target temperature by detecting compressor head temperature The period of control is about once per 20 seconds and output a few pulse 60 6 Outdoor DC fan motor control circuit e his model is built with DC fan motor control circuit inside outdoor electrical unit Outdoor Electrical L L L Smoothing capa F4 3 15A Fuse an Switching power source DC current ld his DC fan motor is control by outdoor microcomputer that follow the operating instruction received from indoor microcomputer The DC current that flow from R 41 will presume actual operation speed and control the rotation to follow the operating instruction Based on this DC current it will detect a over current and other fan motor failure 1 Fan mot
49. NET WEIGHT se w e 4 e 4 O x After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOH IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT JULY 2013 Hitachi Household Appliances Wuhu Co Ltd RAS AW 000 10 11 SAFETY DURING REPAIR WORK In order to disassemble and repair the unit in question be sure to disconnect the power cord plug from the power outlet before starting the work If it is necessary to replace any parts they should be replaced with respective genuine parts for the unit and the replacement must be effected in correct manner according to the instructions in the Service Manual of the unit If the contacts of electrical parts are defective replace the electrical parts without trying to repair them After completion of repairs the initial state should be restored Lead wires should be connected and laid as in the initial state Modification of the unit by the user himself should absolutely be prohibited Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance In instaling the unit having been repaired be careful to prevent the occurrence of any accident such as electrical shock leak of current or bodily injury due to the drop of any part To check the insulation of the unit measure the insulation resistance between the power cord plug and grounding terminal of
50. temperature Indoor fan Outdoor fan Shut FUDICOL1 2 Ss nod Notes 1 The sleep operation starts when the SLEEP button is pressed 2 When the sleep operation is set the maximm compressor speed is limited to CSZMAX and the indoor fan set is sleep FCSOY P 3 The indoor fan speed does not change even when the fan speed mode is changed 4 If sleep operation is canceled by the cancel button or sleep button all data is cleared 5 1 hour after the sleep operation is set the sleep shift value OYSFTC is added Compressor speed Dehumidifying 305 temperature judgement temperature 1 A 5 N Cooling preset temperaure N pepe peg ou 1 judgemen A 1 Start Stop Switch Operation lamp Thermostat judgement ummm Indoor fan 5 min OFF 1 min ON Hi Outdoor fan Med bo Reversing valve 15 sec Dela ab COD c Notes 1 If the room temperature is cooling preset temperature 1 33 C or less after 30 seconds from starting the operation the operation is done assuming as the preset temperature room temperature at the time 270 2 The indoor fan is operated in the Lo mode During thermo OFF indoor fan will be OFF for 5 minutes and
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54. STANDARD AC VOLTAGE IF AC VOLTAGE INPUT IS NORMAL WITHIN 10 CHANGE P W B s EEPROM READING ERROR CHANGE P W B MAIN In case abnormalities found in measurement result change the defect part In case electrical is normal and before it can be use modify back JW001 and JW002 as normal condition before conduct self check In case of service person forgot to release JW001 and JWO02 to original condition Case 1 If main power supply continuously ON outdoor microcomputer will keep showing diagnosis result LD303 will ON and LD301 will blinks Case 2 If main power supply OFF at once then switch ON again a Outdoor microcomputer will wait the self check command by pressing test service switch within 3 minutes LD302 blinks 1 time If test service signal input is not received unit will return to normal operation mode after this 3 minutes has lapsed LD302 OFF and LD301 blinks 1 time Case 3 If main power supply OFF at once then switch ON again and on indoor unit by remote control a Indoor unit will receive remote control signal and send signal to outdoor unit For the first 3 minutes outdoor microcomputer will ignore this indoor signal LD302 blinks 1 time b After 3 minutes has lapsed LD302 OFF and LD301 blinks 1 time unit will return to normal operation mode 89 CHECKING THE REMOTE CONTROLLER Is battery polarity correct Install the battery in the correct polarity V Yes
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57. 5X 1 6 238 1000 4 HIM isi Te LAE g B 25K 8 05 R627 330 49 5926 402 10 6 2150 C C 53 1205 LD301 sur gaoverp R i T Tere 104538 H Td n POWER RELAY E Ele S ER R25 6 ms 8628 2 2 5x It C Iit 37 a 1 a czai 25 0 1 0302 INR ALM RPM LT D 0V 09 maur current SEL TOMINTEATTON SOT 62 Ed H 9 3 AIC 6 100 1005 gt 149 1005 0914 33 25 1 LD303 BRNI 12V 12V D na RELAY ceee E ETE 0 n Aal R254 atc 6 0915 __ 25 BELA dons TPM Pam RELAY B Tenore EGON ej 0 57 foxia a C231 1410025016 C 11054 teng ZENER DIODE Siae8 B 2717 a R2 1008 13 0252 0 06825 C 8 i LU SESS 2 38 amp EB 8 R 56 3x lac 255 2632 15 C ft 19 8912 51 1255 t1608 9 7 1 135 A 6 ISYMBOL MODEL EPROM 9 1 5 85 5039 1 Ni 2 AFE R241 57 c 1634 R 1005 89131 5 5 mni d MICON E EE
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60. 55 24 zc 1005 RL The OUTSIDE e SNO E R289 ee am Sims R656 24 T Ri 7 Ta CNB 2 WHT H M 144 MISTOR 2 t CN BURG THERMISTOR o xc 8 ROBT Tc 657 20K 5s It C 16 28 1005 RL5 G5N 1A HEIM 9 XA 2P BLK H m us 80 70 3400 2 H 0274 OV ps i GNIS x HE 72 7 6P Mut HIC 0V R289 TA TM TI CN17 PH 4P 48 m m R285 CN18 PH 11P 140 pee 0501 Euer e ss E m OSCILLATOR CN21 PR 12P BLU 25 ba m CN22 PH 12P BLU H M 7 15 x wove CN24 5 Xi ke pupua 25 XII 0055 CN26 A T CN27 CN28 iT 34 BLOCK DIAGRAM INDOOR UNIT OUTDOOR UNIT Outdoor DC fan motor MODEL RAK 18 25 35PSPA RAC 18 25 35WSPA HARMONICS 7 POWER RELAY gt RECTIFIER IMPROVEMENT gt CIRCUIT Inrush current DC compressor Protection circuit motor Rotor magnetic gt pole position detection circuit Ip
61. Check outdoor electrical parts d CHECKING THE INDOOR OUTDOOR UNIT ELECTRICAL PARTS AND REFRIGERATING CYCLE MODEL RAK 18 25 35PSPA RAC 18 25 35WSPA Yes See Troubleshooting when the timer lamp blinks Check the outdoor electrical parts Timer lamp Set to room temperature 16 C in the cooling mode or to 32 in the heating mode and press the start stop button Four times blinking Remove the decorative cover and electrical parts cover and check the pin voltages of brown and red wires Pin 8 35 V D 0 V Does operation lamp on the indoor unit CN3 start to light or blink No Yes Is the compressor in the outdoor unit operating Remove the outdoor unit cover and electrical parts cover and check self diagnosis lamp LD301 Is approx 32V to 35V being generated TEST SWITCH Is the polarity correct One time blinking No Yes P W B Control Check to see whether the connecting cord is connected incorrectly or disconnected Normal Blinking other than Nine times blinking one time or nine times Set the test switch on the outdoor unit to cooling Does the compressor operate After checking be sure to return the Yes Communication circuit self diagnosis is done by the operation of the remote controller The result is service switch to normal Timer lamp Three ti
62. FZONTMW2 MAX WLHMAX Starcp3_LH Starcp2_LH Starcp1_LH MIN WMIN_LH 0 Compressor rotation speed Hi FAN_LH_H 15sec Hi FAN_LH_H Outdoor fan Notes Perform Leave Home operation according to the following control contents Operation mode Heating Compressor start control Set the start control using the special value for the Leave Home mode Temperature set 10 C Compressor rotation speed Upper limit speed by fuzzy control WLHMAX Temperature setting correction shift SFTLVHMJ Lower limit speed by fuzzy control WMIN_LH Indoor fan FWLVHM Operation lamp The timer lamp lights up when the timer for the desired number of days is set fan FAN LH HJ X The vertical air deflection plate is initially operated when the Leave Home mode is activated this serves as a notification that the Leave Home mode has been set 44 button Set temperature Heating 0 66 C Current restrict Compressor speed Notes Can t set POWERFUL and ECO at the same time During FAN operation can t set ECO SILENT Silent button Ultra Hi hi Indoor Med fan Silet Ultra Lo WSZMAX CSZMAX speed Outdoor fan Notes Can t set POWERFUL and SILENT at the same time Cooling 0 66 C Dehumidifying 0 66 C 45 REFRIGERATING CYCLE DIAGRAM MODEL RAK 18 25 35PS
63. gt INSERT PROPERLY JW002 TO ORIGINAL CONDITION NO SHORT CIRCUIT CONDITION CRY GRAY BOARD P BOARD ABNORMAL 2 CIRCUIT SHORT CIR gt 2 CHANGE THE THERMISTOR 1 DIAGNOSIS FOR REVERSE VALVE OPERATION ERROR RED RED NES iene TIMES CUIT OF THERMISTOR WIRE XIF STEP NO 6 NOT CARRIED OUT THE SYSTEM WILL NOT OPERATE ee AE WHT WHITE um xu T poc 000 CONTROLLER DEFECTIVE CHANGE ODU CONTROLLER PROPERLY UNTIL 3 MINUTES HAS LAPSED AFTER RESTORE THE POWER IF OK WB VEL YELLOW d de SUPPLY 5 2 DIAGNOSIS FOR COMMUNICATIO ag OR OUTDOOR NOT 230 508 FUNCTIONAL CHECK WIRING CONNECTIONSBETWEEN INDOOR AND OUTDOOR 00353284 1 15 SELF DIAGNOSIS MEMORY FUNCTION Failure modes are stored in the nonvolatile memory of indoorunitand shall be redisplayed by remote controller This function is useful in checking the failure modes either during switching OFF the power or restarting the device without checking the number of indication lamp blinking Remote controller can redisplay up to last 5 failure modes from the memory However failure modes which are rarely to occur are also stored in the memory which caused the numbers of failure more than 5 Thus for some failure modes which areunable toretrive because of remote controller limitto redisplay only 5 failure modes it can be found by clearing up the memory firstthen recheck the memory content again during the visit a
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66. 100 5 1716 C M C304 C C M 88 1008 1000p 50 C 82 B QII6 DTCII4EE or ertet Eee pog R305 Tk 5 1716 C M 42 1005 R653 tk 5 1 16 C M RB51 5x 172 M C305 16 c C M 2005 C612 16 c M 1005 iri aaa H 306 1k 5x 1 16 M 42 100 8601 5 1716 c 42 is 8654 10k 5x 1 16 C M C613 50 2 Orsi Syntol L751 CHIP JUNPER 32 1608 5 R307 42 1005 2 ___1 5 1 10 C 42 1005 8655 5 M Root 5x M 35 1009 C321 0 50 F 68 C614 50 eo CH 10201 SLR 332YC3F H 1752 CHIP JUNPER 32 1008 6 2 5x 1 0 C M R308 1k 5x 1716 C M 42 1005 R656 tk 5 1 16 C M 902 tk 5x i6 c m 1009 c322 1000 80 C M 8 C615 16 C M 21005 0212 SC2412K R 14 10202 SLR 332DC3F H C13 5x M 5x 35 105 6657 tox 5x M C323 0 116 C 88 1008 LOTT BLOTRNI X R61 1 5 1 16 c M 42 1005 6658 10k 5 M ROIO 5x 42 1005 324 0 16 c 1000p 50 c C B 0331 RNI106TEBSL 95 L912 BLOT
67. 12086 15sec Control by 10sec heat exchanger temperature qe heat exchanger temperature a heat exchanger temperature 10sec T Hn heat temperature jertemperatwre WIU heat exchanger temperature i E JJ ICTU o i ___ _ Operation lamp LLLI 1 1 min WMAX2 Max WMAX NOTE 11 Rating 2 WSTD o o Wtd 5 _____ a 1 bo FN WMIN Outdoor fan 180sec Delay a 180sec Delay 180sec Delay Reversing valve heating on model Notes 1 2 3 4 gi gt gt gt 7 8 9 Condition for entering into Hot Dashed mode When fan set to Hi or Auto mode and i Indoor temperature is lower than 18 and ii outdoor temperature is lower than 10 C and iii compressor speed P section due to temperature difference between setting temperature including the correction shift only and room temperature is WMAX or higher Hot Dashed will release when i Room temperature has achieved the set temperature SFTDSW ii Thermo off During Hot Dashed operation thermo off temperature 15 set temperature with shift value 3 After thermo off operation continue in Fuzzy control mode Compressor minimum ON time and OFF time is 3 minutes During normal heating mode compressor maximum rpm WMAX will maintain for 120 min
68. 1j Tj rid gt lt lt gt 29 29 gt lt 29 am 29 gt WN 29 m WN gt 29 29 2 lt UJ re TJ 29 UJ eH gt O KH 29 2 lt 22 lt z i 2 gt Q 2 gt WN UJ Se N lt lt lt ee gt lt 2 on Ee lt lt ley RAC 18WSPA HWRAC 18WSA HWRAC 18WSA HWRAC 18WSA HWRAC 18WSA HWRAC 50WEA HWRAC 50WEA c HWRAC 18WSA HWRAC 18WSA HWRAC 50NXZ HWRAC 50NXZ HWRAC 50NXZ HWRAC 50NXZ Jo Jo Je e 100 bo HWRAC 50NXZ HWRAC 50NXZ HWRAC 50NXZ HWRAC 50NXZ HWRAC 50NXZ HWRAC 50NXZ HWRAC 18WSA N N iw c m 44 on fon N EN NS EH NN ES ES 2 ER o EN MS EN HHAW PARTS RAC 25WSPA HWRAC SXI1OHAK A04 HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC SX18HAK A19 HWRAC SX18HAK 24 HWRAC 18WSPA HWRAC 18WSPA HWRAC SX18HAK 26 HWRAC SX18HAK 27 HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA A15 HWR
69. 25 C 80 1608 0 6 C M 1008 CN10 B06B XASIC 1 8 30 9P Top 0 56 5x 174 M 326 8633 5 1 16 C M R706 sx m ernal 2204125 D R M 6522 0 012116 c 83 1608 B 5521 0341480 C M 108 1CS T S80942CMC GoCT2G 5 M 126 D R122 100 5 c M 20 1608 R634 10k 5 1716 C M 5 1716 C M 35 1009 oris 50 D 21608 6523 0 12116 C C 88 1008 coor 50 87 CH CNIT R123 33k 5 l 10 M 21 1608 R507 ox 44 1005 1 16 C M R708 sx 771009 50 c 7 524 0 16 C C M 88 1005 902 0 14116 C C M 88 1008 D541 C M 108 16541 NJM2831F05 127 Buzzer 124 100 6 1 10 20 1608 R502 5x M 221005 5X M 8709 5x 1 16 c M 35 1009 8125 6 M 19 1608 R637 10k 5 M 0 25 c M 81 1608 25 D R 2 VR 5 CN12 H M 33 126 5 1 10 M 19 1608 R638 5 1 16 M 8734 5x 17 16 35 1005 122 D M 71 C541 16 21608 0 1425 M 8
70. 3 Smoothing capacitors 6021 6024 400 uF 450V his smoothes averages the voltage rectified by the diode stack Reactor 5 3mH Input voltage PAM 15V R625 da R627 Q623 Ll R626 Q621 C621 IPM OV M HIC Microcomputer D202 2652 C652 Fig 1 2 Input voltage AC AC220 230V Current flow thru reactor During low load d 0601 0602 Chopper period Current flow thru reactor During high load Chopper period Vd DC DC260 360V Fig 1 3 4 IGBT to improve efficiency Q601 Q602 It will improve the efficiency during compressor load become heavy when current flow thru the chopper period of 0601 0602 56 b C001 C007 C015 C016 C026 C027 1004 1005 absorb electrical noise generated during operation of compressor and also absorb external noise entering from power line to protect electronic parts 6 Surge Absorber Varistor1 2 3 These absorbs external power surge Smoothing Capacitor HIC 9 LTD A VOS P W B IPM careful to avoid an electric shock as a high voltage is generated Also take care not to cause a short circuit through incorrect connection of test equipment terminals circuit board can be damage 2 PWB for power circuit Voltage specification of power circuit as shown in below table Checking point
71. C 81 1608 0121 00541480 C 108 CNA 115 560 5 178 C M 53 3216 R336 39 5x C M R627 10k 5 1716 C M 0713 0 125 c c 81 1608 1C301 NJM2903E S 123 Photic Unit CN5 5 24 CZ 8P Side R16 5x M 771608 R628 10k 5 1 16 C M R701 5 1716 M 77 1003 6506 0 12125 c 81 1608 1321 0541480 C M 108 poe CN6 B12B PH K 5 26 5 1 6 1608 390 5 C M 43 1008 6629 ik 5x M R702 5 l 16 M 1 507 0 1425 81 1608 741 16 c c M 271008 1G401 S 24C16CI T871U8 5 M 124 CNT 06 5 1 27 8 1 2 16 C 60 1608 R402 390 5 M 1008 8630 10k 5x 1716 C M R703 5x 21008 22010 C M 15 8216 C508 16 C c M 271005 5401 155184 C M 109 Syntol H CNB CNIS 13k 2 1 16 C M 61 1608 6403 5 1k 5 1 16 C M 40 1009 R631 5 6704 5 35 1009 cii2 T000p 50 C C 82 1608 C 78 125 D402 155181 C IC501 HD64F36109NV 5 M 125 TUM26 TRK H 04 5 1 8 29 120 15k 1 16 C M 62 1608 5 1k 5 1 16 C M 40 1009 1632 5x l 16 C M 8705 1k 5x 1716 42 1005 criso
72. D ede E R181 RA18 100 5 A M 35 R75 EN CI02 2e0ppk C P 6788 5 D 89 woven S 4 15 55 3 1 2 A M 52 103 10002501 F P M 6 cr22 0250 89 2701 DINK60 NARKS P 3 Js 0107 BEN 0V 200 R435 754 meho ciO4 68 250 1026018 89 D702 DINK6O i 1 mr HF70BTL3 M 122 3 au 1005 R436 C105 25 4932 02 7 R201 510 5 35 R760 100 5 100250 C M 70 0725 2703 ___ 981 122 mn to wos 8437 1 2X 5X I 4 38 24 C106 2200601 25 C1 RM 4 s SUR T 5 4 m m x m 2 82 59 37 bs ur xa iShws Ci07 270 cree L004 NF GOILI 23 HT T 4 R205 1005 1311005 3302 05 NORMAL colL H 124 j 1 5 25 005 R763 Ale 13 5 ppu MIS C731 i 1006 crogi 1 100 2512 R 79 i R206 5 1K 5x10 0126 8522 R764 5 LIKI MIB C 1 ahos 00 25 D R M 74 0732 COILS 5 s TOK C Wit 2 5 no RT 5 110 100 25 1 4 5 BM E L105 oe ioc ee sS caris Cr GS o fw rs 25 C A M 1 i zoon f TOC SMMC PSs C Eas a
73. Loud noise from the outdoor unit is heard when operation is started The compressor rotation speed changes according to the difference between the thermostat set temperature and room temperature This does not indicate a fault Noise from the outdoor unit occasionally changes There may be a difference between the set temperature and room temperature because of construction of room air current etc Set the temperature at a comfortable level for the space There is a difference between the set temperature and room temperature Air does not flow immediately after operation is started Preliminary operation is performed for one minute when the power switch is turned on and heating or dehumidifying is set The operation lamp blinks during this time for heating This does not indicate a fault The unit is operated after built in installation behind the lattice door turns off for a long time and the room is not warmed cooled Check to see if warm cool air is being short circuited behind the lattice door A short circuit is likely to occur when the deflector position is not appropriate the lattice does not have a big enough opening and or the unit is installed in the inner part Install the unit as near the lattice door as possible 68 TROUBLE SHOOTING MODEL RAC 18 25 35WSPA PRECAUTIONS FOR CHECKING Outdoor Controller A Point 7 LL UL HL 777 400uF
74. gt Id gt control circuit 1 Is gt m Operation x Indicating lamp Timer lt 5 5 lt O E thermistor ed gt Overheat thermistor gt gt Relay drive circuit lt Room temperature me M Auto sweep motor 1 9 thermistor o g Defrost thermistor gt Q Q Outdoor temperature thermistor gt Electric expansion valve O Indoor Outdoor gt Temporary switch 2 Indoor Outdoor interface circuit i gt interface circuit D DA gt gt Reversing valve lt lt control circuit Be motor drive Reversing valve coil circuit gt Reset Indoor DC fan motor Power circuit circuit Microcomputer clock DC35V Circuit 30 BASIC MODE MODEL RAK 18 25 35PSPA Operation mode Cooling Dehumidifying Heating Auto Basic operation of start stop switch Off timer Basic operation of temperature controller Timer functions Fan speed mode indoor fan Sleep operation with sleep button ON Start Start stop switch Operation lam Start stop switch Reserve switch Cancel switch Operation lamp Timer lamp Start stop Reserve switch Cancel switch Operation lamp Timer lamp Change in reserved time Changes from Hi to Med or Lo depending on room temperature Room temperature Temperature
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77. 1 e OH thermistor circuit detect the temperature at the surface of compressor head DEF thermistor circuit detect the defrosting operation temperature e thermistor is a negative resistor element which has characteristics that the higher lower the temperature the lower higher the resistance e When the compressor is heated the resistance of the OH thermistor becomes low and 69 5V is divided by OH thermistor and R301 and the voltage at pin of microcomputer e Compare the voltage at microcomputer pin and setting value stored inside If the value exceed the set value microcomputer will judge that the compressor is overheated and stop the operation e When frost is formed on the outdoor heat exchanger the temperature at the exchanger drops abruptly Therefore the resistance of the DEF thermistor becomes high and the voltage at pin of micro computer drops this voltage becomes lower than the set value stored inside microcomputer will enter the defrost control e During defrost operation the microcomputer will transfer the defrosting condition command to indoor unit via 00 pin of interface of IF transmission output e microcomputer read the outdoor temperature by Outside Air thermistor and transfer it to the indoor unit thus controlling the compressor rotation speed according to the set value in the EEPROM of indoor unit and switching the operation mode outdoor fan on off etc to DRY mode Below table show the typical values of
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79. 24 C703 2202501 82 BYMBOL MODEL B a ae HE 3 3K M 4 R741 0 24 ox 1 H M 49 0704 2209 50 82 0321 Kpsig Rri P C 1 69 PQIOI TLP421BL DITE z E 0000 L8 3 5x14 A M 24 6705 __2202 50 E RII co32 0 1 5 M 82 D402 DINKG 2 petition 398 RUS 1 80 MAB H 6706 220 50 82 0 98089 SWTRANS 6 35 5 5 MEG Bl a CTOT 10050 C 901601 0 Pa402 TLP4218L W M IS 0105 1 pepe pepe pepe mi Eag 48 1M ax 50 708 1005501 60 5601 130160 COWS D v TENE Rio T K 8 C709 100250 C 60 005 96 PO4O4 TLPAPlBL H l 4 Sx 29 4T 10 51 220506 6 261 15 CSC m 5x 4 A M 20 RA 1k 29 R748 10 6 51 49 2612 158133 7 20701 7 TS 0106 aby tpm 0251 1 IA FNPAES Ex IL A 29 8740 10 51 138 a ujore 705 1 E R D631 11 26 NDUCTO gt i EC GERE
80. 5 ie 5 R102 5 3 4 M 16 ET Ed 721 100 EAT c it zm C631 UTE a Ei KDSIBI RTK P C mic 69 ME NIMES RH INTERFACE 2 R103 0 27 5 2 17 4L 0632 0 04725 cle 1005 02 C Hc 69 0703 RN 75 mae pee amm s sls ravcworor EI ER nr His 80 S 5 4 os RT3l 270 5 M65 1BA RTK P C 11070 TE M 14 641 0 04725 m my bd Rios Mid R334 bx oos 6732 270 55 ATM 2122 a 0 65 5 48 D272 fOsIBI RTE P 0169 SOT 286 T2T4GT7 2200000000000 107 51 A M 8733 270 5 65 C651 ia 112 slet Lol 5V i gt d 20 48 C024 0 01 25 152 D erste sty 5 EE X Riog p IKA AEI 4Co D Mes cose c i M e 1608 7 An js E BLO fox HTN R350 026 0 01 C H M 59 77 220060 PHOTO COUPLERS 4 D804 i g R 351 10K 25 c027 0 00 M82 STET Sr m cet Ms 085 2 EINE RU axe a R352 I3 oos 6702 220 82 D SIE S 1 6 2 2 HIC OV amp ei 3 8 14
81. Micon Tester L105 5V 5V 0 TesterO 425 OV Outdoor not operate no blinking indication Micon 12V 0 12 102 3 4 e Outdoor not operate no blinking indication Relay circuit IPM for Comp Tester J58 16V EE 16V 0 P 15 5 1 5V IPM for DC TesterO 425 OV Stop LD301 3 4 or 12 times blinking Tester J23 PAM 15V my PAM 15V 0 ACT circuit TesterO J25 0V Stop LD301 14 times blinking X Power circuit for pwb can consider normal if the result is satisfied with above specification of 3 Latch type reversing valve control circuit This model comes equipped with a latch type KTiming for voltage measurement reversing valve Forcible cooling The latch type reversing valve is so designed switch test switch that its valve is slid in a specified direction ON according to a specific operation mode thereby Reversing es switching freezing channels and retaining the n built in permanent magnet Compressor The latch type reversing valve control circuit is PIS so designed that in response to an operation Fig 3 1 command from the indoor microcomputer the reversing valve coil receives a current in a specified direction according to a specific Reversing valve operation mode thereby sliding the valve The product is energized twice at increments of 1 second as illustrated in Fig 3 1 starting CN2 immediately before compressor start
82. ON for 1 minute 3 When the operation is started by the themostat turning ON the start of the indoor fan is delayed 32 seconds after the start of compressor operation 4 The compressor is operated forcedly for 3 minutes after operation is started 5 The minimum ON time and OFF time of the compressor are 3 minutes Dehumidifying Sleep Operation Dehumidifying Powerful Operation 0 5 hr 7 hr 1hr 7 hours SLEEP button Operation lamp Timer lamp Sleep shift value for setting temperature Hish SS of Indoor fan See basic operation fp L X 5 5 Outdoor fan Shut Horizontal deflector FUDIDRY1 2 SLP FUDIDRY1 2 SDMAX or SDRPM Compressor speed Notes 1 The sleep operation starts when the SLEEP button is pressed 2 When the sleep operation is set the indoor fan set is sleep P 3 The indoor fan speed does not change even when the fan speed mode is changed 4 If sleep operation is canceled by the cancel button or sleep button all data is cleared 5 1 hour after the sleep operation is set the sleep shift value OYSFTSD is added 41 POWERFUL setting 20 Temperature setting gt PWSFTSD SDMAX Notes 1 Pressing the POWERFUL button will reduce the temperature setting by PWSFTSD 2
83. Yes Is the battery check sign Replace the battery flashing Turn radio bring the remote control switch within 15 cm of the radio and press the ON OFF button Check the LED D1 with Does the radio buzz noisily multimeter Check the indoor unit signal receiving P W B If itis good check the main P W B AM radio Check functions again If it does not work replace the remote controller 90 HOW CHANGE THE SHIFT VALUE SETTING TEMPERATURE The shift value setting temperature for Cooling and Heating mode operation can be change using remote controller This procedure shall be implemented strictly by service personnel only For initial shift value temperature setting for Cooling mode SHIFTC and Heating operation mode SHIFTW Please refer to page 37 PROCEDURES 1 While pressing and holding D START STOP button and ON button press reset RESET button on the same Release RESETC RESET button only and make sure that all marks on the remote controller display are indicated then release the 0 START STOP button and ON button Remote controller now enters Shift Value Change Mode 2 Press the TE MODE selector button so that the display indicates 2 3 Press the D START STOP button and FAN operation will be started 4 Set the FAN SPEED with the s FAN SPEED button according to the following FAN speed setting in orde
84. at is 2112 i Roog RED GRN D W LOR J I GONFRESSOR WOTOR GRN2 012 ze 0940 862 20861 hes RB62 8861 15 m 1905 R625 2623 863 0 3 0 CONTROL CND be 16V amp RESISTORS 5 8 ET E RESISTORS T i uo e 11 RESISTORS CAPACITORS CAPA wur Mee SYMBOL REATING EATING 1 CAPACITORS LODES SHUNT ROOI 180k 10 POL sur Ln RATING Te f RATING TRANSTSITORS BASE ure meo MATING Te RETE FEFEERUE PAM QV meat Em He Ds C WC 42hoss 8702 240 1 0 01 5 C H M 59 t 6504 ni lesitala d MODEL rompon MODEL EN d E cet b 5 R004 aroiu a TM 1 R703 hans 2 0 01 59 Fe 2001 155120 90 A 1 R303 5 240 5x116 Ht 39 C505 100P50 C 00 90 0203 ROOST 69K XII A 3 C 43 RT ws C003 3 3 6 1005 12002 1520764 RRE E C it 74 i B M 12 1008 04 240 5 16 c C506 100P 02 3 5021 poo23 ES i MEAE aee ones uut 5g e monalisa tamami RR 6 me 14 R705 eao Ex 600
85. electric shock due to high voltage when conducting an operation check Power supply for DC fan motor and compressor is common DC260 360V 62 NO SI A NO S gt T 29 RA gt 5 c TWNIWYAL NIVN E Mid cav gt 9 19 a 10 0 1055249109 1 M A FR b RA WN IY PS 8008 x i i u3auosav 39915 T ii HSINI aay et vid _ 2008 I o o F Gre 274 1100 1VIWHON 9007 1100 007 9505 YSZ 14 quvog 390149 8 P 3U pue A M pue Jo 614 63 _ 1 Intelligent power module switches power supply current according to position of the compressor motor rotor The switching order is as shown in Fig 7 2 At point E Ut is ON is ON circuit in Fig 7 1 At
86. for the operation 2 When it thunders near by it is recommend to stop the operation and to disconnect the power cord plug from the power outlet for safety 3 The room air conditioner does not start automatically after recovery of the electric power failure for prevent ing fuse blowing Re press START STOP button after 3 minutes from when unit stopped 4 If the room air conditioner is stopped by adjusting thermostat or missoperation and re start in a moment there is occasion that the cooling and heating operation does not start for 3 minutes it is not abnormal and this is the result of the operation of IC delay circuit This IC delay circuit ensures that there is no danger of blowing fuse or damaging parts even if operation is restarted accidentally 5 This room air conditioner should not be used at the cooling operation when the outside temperature is below 10 C 14 F 6 This room air conditioner the reverse cycle should not be used when the outside temperature is below 20 C 4 F If the reverse cycle is used under this condition the outside heat exchanger is frosted and efficiency falls 7 When the outside heat exchanger is frosted the frost is melted by operating the hot gas system it is not trouble that at this time fan stops and the vapour may rise from the outside heat exchanger o U m gt 2 o RAK 18PSPA RAK 25PSPA DA A RAC 35WSPA FAN MOTOR 47W DC120 380V FAN MOTOR CAPAC
87. frequency A failure detected on the outdoor unit side will be indicated by the timer lamp blinking 4 times after a retry operation has been performed several times Note In some failure modes only the retry operation is repeated without lamp indication Failure modes that will repeat a retry operation without the indoor unit lamp indication are as follows OH thermistor temperature rise Outdoor unit communication error Power voltage abnormal Less frequent defects Indicating a failure on the outdoor unit side e he 10301 indicates a mode of failure detected on the outdoor unit side by blinking frequency Upon failure detection the outdoor unit will shut down and the LD301 continues to blink until the unit is reset In the event of communication errors the LD301 continues to blink until communication is restored 13 l TROUBLESHOOTING WHEN TIMER LAMP BLINKS Model RAK 18 25 35PSPA Perform troubleshooting according to the number of times the indoor timer lamp and outdoor LD301 blink SELF DIAGNOSIS LIGHTING MODE Model RAK 18 25 35PSPA il 2 sec 9 Times Indoor sensor defective uu Abnormal rotating numbers LE Ea 8 EC 10 Times of DC fan motor 2 12 Times interface voltage error ER 13 Times 10201 detective Lights for 0 35 sec at interval of 0 35 sec 1 Cautions 1 If the interf
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91. point F Ut is chopped OFF is ON circuit in Fig 7 4 vt wt yt y Ce 1 Lower arm Time transistor nap a V Fig 7 2 Switching order of power module Upper arm transistor is controlled to ON OFF by 2 5kHz 5kHz chopper signal Rotation speed of the compressor is proportional to duty ratio ON time ON time OFF time of this chopper signal Time T in Fig 7 2 shows the switching period and relation with rotation speed N of the compressor is shown by formula below 60 2 X 1 T Fig 7 3 shows voltage waveform at each point shown in Figs 7 1 and 7 4 First half of upper arm is chopper second half is ON and first half of lower arm is chopper second half is ON U transistor chopped U transistor ON Voltage at 280V 300V lt Chopping period Chopping period 208H sec ON Upper arm transistor Current at Fig 7 3 Voltage waveform at each point When power is supplied Ut V because of that Ut is chopped current flows as shown below 1 When Ut transistor is ON Ut transistor gt U coil V coil V transistor DC current detection resistor gt Point Fig 7 3 2 When Ut transistor is OFF by inductance of motor coil U coil V coil V transistor U diode gt Point Fig 7 4 d
92. the unit The insulation resistance should be 1M or more as measured by 500V DC megger The initial location of installation such as window floor or the other should be checked for being safe enough to support the repaired unit again If it is found not so strong and safe the unit should be installed at the initial location after reinforced or at a new location Any inflammable object must not be placed about the location of installation i A Check the grounding to see whether it is proper or not and if it is found improper DUE connect the grounding terminal to the earth WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS 1 Scope The standards provide for items to be generally observed in carrying and handling semiconductors in relative manufactures during maintenance and handling thereof They apply the same to handling of abnormal goods such as rejected goods being returned 2 Object parts 1 Microcomputer 2 Integrated circuits 1 3 Field effective transistor F E T 4 boards or the like to which the parts mentioned in 1 and 2 of this paragraph are equipped 3 Items to be observed in handling 1 Use a conductive container for carrying and storing of parts Even rejected goods should be handled in the same way IC A conductive polyvinyl bag Conductive sponge Fig 1 Conductive container 2 When any part is handled uncovered
93. times 6 times amp times power module again and operate the Within Time until the Approx 10 seconds Approx 46 lamp lights 30 eaconds seconds Possible Bue Is the self diagnosis lamp mode as Blinking ot shown on the right Outdoor air temperature CC YES R410 A The values above are the theoretical ones Normal Stop to operate and check the gas Checking the IPM main P W B pressure in balancing mode Error Gas leaking When the self diagnosis lamp lights in the same condition as above Gas leaks Repair and seal refrigerant The compressor is defective Replace it and seal refrigerant If the compressor checker for an inverter type air conditioner is available re check using it Perform a final check of operation HOW OPERATE USING THE SERVICE SWITCH THE OUTDOOR UNIT Model RAC 18 25 35WSPA 1 Turn the power switch off and then turn on again 2 Remove the electrical parts cover Never operate the unit in this state for more than 5 minutes Service switch forced cooling mode is set by pressing for 1 second or more and stopped by pressing Open the upper cover again Electrical parts cover Cautions 1 If interface signal 35V DC terminals C and D are not connected when the outdoor unit service switch is used for checking the outdoor unit defect indicator LD301 will bl
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97. 1 1608 1C712 ULN2003ANSR M 128 7681 1 H CN12 soep czHK B 1 8 H 15 RIPT 5 1k 5x M 22 1608 R521 5x i6 c M 271009 Re39 5 1716 C M c123 0 1 16 C C 88 1008 cp a talie c B cor 1000 s0 C C 182 160 B Diode 2 2 1716 c M 42 1005 R640 Ok 5X 1716 C M R741 300 5 1710 C M 26 1608 C543 25 c C M 771608 Dodo RIS 5X M 2771608 8523 00 5 1 16 C M 45 1005 R641 5x M 8742 390 5x M 27 1608 0 22280 C 16 3216 44 O 1n 25 C C 81 1608 irai R132 5x M 16 R642 5x 1 16 C M R743 5 M 21008 132 tele c 88 1008 Syntol H Soil R541 5 1716 C M 42 1008 5 1716 C M 6133 16 c C M 1005 ZD11i RD6 2UJN2 C H mm NIS 8215 27k 5 1710 c u F 6 1608 6542 5 1716 c M 46 005 Ro44 5 C M R751 2 7k 5X 1 10 C M 28 1608 601 0 1 e5 C M 81 1608 Transistor i Synbol H CNIS HIM 47 5 7 1608 ik 5 l 16 M 42 1005 Ro45 tok 5x M 8752 1k 5x 42 1009 cori 16 D c602 0 16 C C 88 1005 train Mood H ZDIP PTZ20A 4 10
98. 1 82 1 3A SW21i KSM06138 H CNI6 ik 5x u 8 1608 5 C M 46 1008 R646 10k 5x l 16 C M 6212 25 c C 1771608 C603 16 C C 1008 i 2013118176 C M 115 8 R545 5x 0005 Ro47 5x 1 16 C M R831 5 1710 C M 29 1608 C604 C C 1008 0111252518 C M 90 LH 560 0 4A H M 12 151 KSD62 19 R546 5x 1716 M 771009 5 1716 C M R832 10k 5x M 29 1608 C605 1000 50 C cu 112 2505200 M 7021 RDS 6UJN2 C 9 15 O R301 12 7k IX 1710 M 18 1608 R547 0 6 1 16 c 1005 Ro49 10k 5 1 16 C M C301 16 c 2005 c606 0 12125 C M 81 1608 Q113 25052098 91 1301 1004 55 C M 132 518 Y 2 R302 12 Tk 1 1710 c M 18 1608 R548 100 5x l 16 C M 47 1005 Resol l 16 C M R834 51 5x 2 M 8 5029 C902 0 1u 16 C M 88 1005 607 1000 50 C C M 82 B M 97 CHIP JUMPER OV R303 5 1 16 35 1005 R549 100 5 C M Rost 10k 5x l 16 C M 8835 51 6x 5025 303 0 15116 C C M 88 1005 0115 SA1162Y C 2 LED 11501 JUNPER 32 ULE MEN R304 5 M 29 1608 R652
99. 2 of the negative terminal of the tester of the tester Tester type Analog tester The pointer will keep swinging up to about 150 V DC The pointer will swing in reverse direction goes back to V and then swing back to about 150 V DC Digital tester The pointer will momentarily display a high value go The tester will display a large negative value go back to O V back to 0 V and then display a large value again and then display a negative large value When the voltage is measured with a tester with the timing for voltage measurement and if the pointer swings as illustrated in the above table then the product should be normal There are dispersions with testers Moreover a digital tester often results in its reading being illegible An analog tester is therefore recommended product is energized only twice a second Missing the timings will therefore result in failure to measure normal operations f the reversing valve proper is normal it will synchronize with the timing for voltage measurement and the reversing itself will click twice If this click is heard the reversing valve should be functioning normally f the energization check shows an abnormality the electrical parts should be out of order 4 Temperature Detection Circuit 5V M thermistor Micro DEF thermistor Computer Outside air temperature thermistor i Outside air temperature Fig 4
100. 3 1 16 18 9101949 peeds SnolA8Jd peeds uey s N3TIS Hesa N3IS 940jeq peeds ue 0 peeds uey pejooueo si uonejedo 133115 s uonejedo O23 Q91 Woy sreeddesip ureBe 023 998 sseig e lt uonng dOLS LHVLS 359 4 e sreeddesip uoneJedo 023 je2 ue sdois uonejedo INAS iun poejoeuuoo GC rs uonejedo eui uo peseq uonounj uonduunsuoo 1 911 940Jeq peeds ue snoi aJd peeds ue uoneJjedo pue 1 10 C3 Ce Co uoung 195 ueis uonejedo C93 C3 C83 SO Vus 133115 3QON 1343 9384 10 uounq 148715 CE JO uonnq dOLS LHVLS D sseld O93 Q91 eu uo pe eldsip S EJ 023 993 amp 4 023 1215 OL MO S en eq peeds uo pefejdsip sr uoneJedo 94 uoneJjedo
101. 4 s uonejedo 4 0 si 379 S Buisseid ueuw suonoeuuoo 104 NV319 UONOUN NV319 jeoueo peeu e 5 49 si 1 BOUC JO JO pjeeM 340 YMS usiuy Nv319 ureBe 3INOH 3AV31 9 9 4o uounq dOLS 1HVLS s ep 139NVO mowo SS ld i dois sKep 1equunu 104 e dsiq jo 1equinu anas SSOld 00 0 Se1eoipur u ym s Jo os pue 66 sAep e 76 86 s ep 66 s ep Jo 198 SS ld os pue s ep 66 s ep 86 skep s ep 195 oi SSHd x IHOVLIH NV312 92 5944 e 379 s ep 52580 B Go 4015 1915 e s ep Jeq
102. 5 C2 04011 A V Y E lt 5 5 191 gt ug 3 Sle gt 5 RECEPTION ES 2742 555 1 27 3 4 5 ey 2 Et 6832 t 5V 5 lt lt we 3 5 C650 R741 A Aj 044 e Le Le lou s 5 gt 8 5 8 D e 6 SDA 2 555556 358555 ELEEE 5 E Beda R401 404 Joe 04404404 5 6 S je S S SCL 4 E e i je js jm je m e je je js je je ja la ja oko n amp R402 26 21 28 29 30 31 32 33 34 35 36 137 38 39 40 41 2 43 44 45 48 49 EU jo RESIO aciei i ve VYYYY Y Y LY LUV Y Y 2 vay v BL 1 6611 o e olo o o LO bs Loo oy st D402 OUS C pes Sau SKU 5 1 8 7565 Acts XO S OS OS O XO So To 12V 0V Tz 2 027 05 02404 024 x eH 1 e o o oe CNA asy TS ROB Lii i PA 6P Top 2434 Cla RX TS D 4 4 1 B 2 901 _ 5 spa DM 10 TX 5 v Timer D 0v e 5 5 020249 Operation 212 6 d
103. 5 i6 126 5 C I3 R935 fonr 5 C330 0 25 ac C931 0 047 25 C C tC 48hio05 Z SYMBOL MODEL i 4 EDS i 300 e 646 3302 83hons C331 0 125 GER rd EIER LEER 75912 22 1 i 1 2647 47 59 5 c C33 z 0 1 oo 15 E A IN 23 250 3 15 B Daw 1005 5x 05 R938 24 5 1005 2 2200525 63 70913 5 M 140 1 aie 1608 941 50 C cH 8722 1 2 4 250V R648 24 Sxi 38 2939 7 uns ium STA i R64 2 116 15 6942 50 C C H o OH THERMISTOR CN8 0 9 9 M3 SRA ROO 1411 16 C 8 0401 10025 79 ve pos RELAY 110 1 28K0 5 g 9 R650 5 1 C 2 8941 100 110 v R281 li ROS IK Sxe 13 942 iki g 1 4400 150 e m MICON TK TIS G R652 510 5 16 C 35 005 ex 24 005 C405 10 116 C LC 16149 ions SYMBOL MODEL fomo R _ SYMBOL MODEL FR OT 21 ni ar C406 0 125 Ic 59 ien foa 7 w48 9 ms 86541 24 038 Roo 100 at pe ee RL2 657 Hebe veer 1 48 3400 H
104. 6 m e amp A Thons 0 116 6 6 49 5 C771 50 6 0861 ies VARISTOR an BEN 12V R224 300 Tone 192 0116 49 0772 SURGE ABSOBER y 9702 q R225 5 1K 5 ate ELECTRIC eu Y 3 Neon mex Abe eon e Ce01 49 C801 0 022 BO LONE M Cu EXPANSION VALBE 4 4 401 1 R227 c fie 28 ios C202 0 1166 C 00 49 ins 931 05226 1 0103 6 R228 390 5 6 C E art t R229 HIER THE C204 4T0P 50 C C Ut 50 os xem 402 8230 530 1551787 7900 C208 toos LEER vse fiis pi 6 E 2601 470P 50 C C Iit 50 B602 RBV 2506 H M E 53 C307 1005 11 1 DE3T 102MF Le R802 395 4701501 C C 150 0 C810 32 2528 R608 180K M 5 4 A M 53 ns Lr 0201 Em 8803 5 cal UMPER 4 1100403 i R609 180K 19 5 1 6 M 54 C 1 0 18 183 HUMER Lg gt d B i 8234 100 5 RC 2405 A M 40kw 2804 3k 54 09 812 100 02510181179 3 2 a C210 16 51 1005 C813 0 De gt
105. 6 Maikap MEE t un 0401 7 86267 n Exin 7 5807 iK 519 C Ht 25 ea 6509 220501 Hc 61 E A 2009 33 R708 1005 007 0 01 59 1 1005 6621 M 10K 5 C me 25 an 0601 6T 2 ROLO 1PM 0V iui Rolo 2 Ex MITE 08 151716 2709 5 c Wc 1005 6008 0 33 88 C601 DIODI 05042 192 060 502121 50 500 107 3 Ei T mor diir 5C z 2911005 009 0 1501 M 61 87 2102 DINL20U 93 2 167503121 190500 H M 107 0026 E E a T d 310 3 C we or 0 hoe 601 65 Dios UND 2722088 7010 gi 3 E 7 a R712 5x 6 C F H M 63usw C604 0 01 104 DINL2OU A M 93lunz 062 108 L701 Ai Tre core Jn nues c P oe i ENEI D105 47 IET 5 4163 250 LN 10K C R25 ios EB epii o R321 1 C 12 roc HE 10K 5x W C Wt 25hioos 0015 612 S0 C A M D108 ET x m On Trek rpm C ToL oe 6016 0109 52560 0641 102 175 12V i Piee 9 RIOT 7 BO 0 y 5x 3 16 R720 10K 5 C622 6 0803 i
106. A RAK 25PSPA RAK 35PSPA HHAW PARTS NO Q TY PARTS NAME RAK 18PSPA RAK 25PSPA RAK 35PSPA UNIT HWRAK 18PSPA 901 2 gt I gt tm zx uv 2 C3 m gt 33 gt gt M 10 uj lt J CT C3 re c 2 HWRAK 25PEA 902 903 N MORTOR HWRAK 18PSPA 902 3 ANGENTIAL AIR FLOW FAN HWRAK ISPSPA 903 m N SUPPORT 55 HWRAS EIOH3 905 N COVER HWRAK 18PSPA 904 N MOTOR SUPPORT HWRAK 18PSPA 905 1 EVAPORATOR ASS Y 1 HWRAK ISPSPA 906 PIPING ASS EVAPORATOR assy _ PIPING EIOS 909 7088 910 MUSEI 25 003 014 MUSEI 915 25 005 7088 917 3 pni car HWRAS E10H3 921 1 DRAINAGE PIPE HWRAK 18PSPA 910 1 2 1 1 HWRAK 25PEA 906 HWRAK 25PEA 907 1 HWRAK ISPSPA 913 STEPPING MOTOR HWRAK 18PSPA 911 DEFLECTOR SUPPORT HWRAK 18PSPA 912 J CO Se Se M HORIZONTAL AIR DEFLECTOR HWRAS E10H3 924 CONTROL ASS Y 1 1 1 HWRAK 18PSPA 914 5 zs e cu Z S Q tj fou zu trj Ej gt E N 3 HWRAS EIOH3 927 95 25 T Ca tH 29 lt gt HWRAS E1
107. AC 35WSPA A01 HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA A20 HWRAC 35WSPA A02 HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA HWRAC 18WSPA NN E 9 0 PARTS RAC 35WSPA UNIT A01 02 A03 COMPRESSOR PUSH NUT A04 AOL 1 1 06 05 1 02 03 A04 1 10 1 11 16 1 17 1 18 1 19 1 05 1 06 1 35 25 OVERLOAD RELAY COVER COMPRESSOR CONNECTING CORD COMPRESSOR BULB SUPPORT DEFROST THERMISTOR COIL REVERSING VALVE COIL EXPANSION VALVE 1 A23 1 24 1 25 1 26 1 27 1 28 1 11 HANDLE 08 1 09 THERMISTOR OUTDOOR TEMPERATURE COVER FOR OUTDOOR TEMPERATURE THERMISTOR 1 SIDE COVER RIGHT 1 A10 1 11 12 2 A13 A14 1 1 16 17 1 18 19 FUSE 25A SUPPORT P W CONTROL 1 21 22 A23 A24 1 25 1 26 1 27 1 28 29 1 SOUND PROOF COVER FUSE 3 154 1 C CAP WN T N BAND gt T cJ Ci WN T Ei nN 100 HITACHI RAK 18PSPA RAC 18WSPA HHAW NO 0073E RAK 25PSPA RAC 25WSPA RAK 35PSPA RAC 35WSPA 101
108. AY T c Lg ee OFF STAT OR MAIN 6 TIMES 3 CLOGGED FILTER IN INDOOR gt 3 CHECK FILTER PLEASE PERFORM THE MEGA CHECK AND CONFIRM RROR CHANGE ODU CONTROLLER ROLO 0 6027 UNIT CAUSE THE INSULATION WITH THE COMPRESSOR 5 and 4 40 pF mee FAN MODE INDOOR AIR CLEAN OPERATIONE NOT ANY MALFUNCTION AS THERE 5 NOT ABNORMAL FOR THE INSULATION LIGHTS FOR 0 25 SEC EEPROM ROQ A REVERSE T E oo DU CONTROL HM F 0 teneor tet ne Rr ac TS an i PEAK CURRENT 1 00 CONTOROLLER DEFECTIVE gt 1 CHANGE ODU CONTROLLER ODU QUTDOOR UNIT T ant ps9 Trips C 2 OTHER CASE gt 2 CHECK THE COMPRESSOR a RETI SELF DIAGNOSIS METHOD OUTDOOR FAN MOTOR INSPECTION SELF DIAGNOSIS P W MAIN TO COLLECT REFRIGERANT FROM INDOOR UNIT AND STORE IT AT OUTDOOR UNIT 1 SWITCH OFF POWER SOURCE gt m CNIS EXPANSION 1 SWITCH OFF POWER SOURCE AND THEN SWITCH IT ON AGAIN WAIT 2 CUTTING JWOOI1 BY NIPPER OR BEING SHORT CIRCUIT BETWEEN _ RED VALVE A SWITCHING __ 1 COMPRESSOR CONNECTOR OPEN gt 1 INSERT THE CONNECTOR ANUIT TIWOOIJANDTJWOO2 FASTEN TOGETHER WITH A WIDE MOUTH OF P W MAIN E ODU CONTROLLER DEFECTIVE i CHANGE ODU CONTROLLER 2
109. CO FUSE F4 CO PUDE P W MAIN amp MODEL RAK 18 25 35PSPA COOLING MODE The compressor has stopped suddenly during cooling operation Check if indoor heat exchanger is frosted Wait for 3 4 minutes until it is defrosted If the air conditioner operates in cooling mode when it is cold the evaporator may get frosted Normal sound when refrigerant flows in pipe Sound of running water is heard from indoor unit during dehumidifying Compressor occasionally does not operate during dehumidifying Compressor may not operate when room temperature is 10 C or less Cold air comes out during a dehumidifying operation To improve the dehumidification efficiency performs quiet fan operation Therefore the air is cold and it is not a malfunction It sets to perform dehumidifying operation by setting the temperature slightly lower than remote controller setting The operation does not stop even by setting the temperature higher than room temperature on the remote controller The circulation stops occasion It occurs during defrosting ally during Heating mode Wait for 5 10 minutes until the condenser is defrosted When the fan speed is set at At the beginning of heating HIGH or MED the flow is the fan speed remains actually Weak LOW for 30 seconds If HIGH is selected it switches to LOW and again to MED after addi
110. GNOSIS RESULT DIAGNOSISE CHECK POINT HOW TO REPAIR T ap E ELECT A A DANGER DC350 oo OP ELECTRICAL SELF DIAGNOSIS BLINKING MODE E BLINK WIRING DIAGRAM COMMUNICATIONS I F CABLE MISS CONNECTION gt 1 F CABLE CONNECT PROPERLY LD SELF DIAGNOSIS nr CIBLE DISCONNECTION gt 2 CHANGE THE F CABLE HOW TO REPIAR COMPRESSOR 10 MINUTES BEFORE START THE SWITCH WHEN SERVICE 3 000 CONTROLLER DEFECTIVE gt 3 CHANGE ODU CONTROLLER QUTDOOR FAN MOTOR GELE DIAGNOS 18 USED JW002 TEST SERVICE RED CONTENTS WET WHT SERVICING WORK OPERATION 1S CONDUCTED ABNORMAL REACTOR 1S UNCONNECTED gt CONNECT REACTOR PROPERLY CONNECTOR CN24 __ SELF DIACNOSTS USED JWUUT SWITCH 2 NON DEFECTIVE FOR 0 MAKE SURE THE LEVEL DC L POWER SOURCE ABNORMAL AC INPUT gt 2 CONNECT TO NORMAL ODU CONTROLLER CHANGE THE COMPRESSOR YEL YEL fy M ERE OUT OF THE RANGE 230 10 AC POWER SOURCE ONCE Pres P W B PM i TIMES 3 AC INPUT 15 NORMAL gt 3 CHANGE ODU CONTROLLER DURING STOP ODU FAN STOP OUTDOOR FAN STOP BY gt 1 IT WILL RE START AFTER DC INPUT a CHANGE ODU CONTROLLER cnai Pit NO 1030 CONTENTS Thi STRONG STRONG REVERSE WIND WIND BECOME WEAK 2 TIMES MG wit salam lat LIGHT NORMAL OPERATION 7 amr em 7 LED 1230 COMPRESSOR CHECK THE COMPRESSOR OUTDOOR FAN OUTDOOR FAN
111. HITACHI RAK 18PSPA RAC 18WSPA RAK 25PSPA RAC 25WSPA SERVICE MANUAL njasPsPA RAC 35WSPA TECHNICAL INFORMATION REFER TO THE FOUNDATION MANUAL FOR SERVICE PERSONNEL ONLY CONTENTS INDOOR UNIT SPE CICA MONS 6 HOW TO DBE ee 8 CONSTRUCTION AND DIMENSIONAL DIAGRAM 27 MAIN PARTS COMPONENT 29 WIRING DIAGRAM 31 RAK 18PSPA CIHOUN DEORA 33 E por ere BLOCK DIAGRAM 35 RAK 35PSPA BASIC 36 REFRIGERATING CYCLE DIAGRAM 46 Procedure for Disassembly and Reassembly 47 DESCRIPTION OF MAIN CIRCUIT OPERATION 49 66 TROUBLE SHOOTING 69 RAC 18WSPA PARTS LIST AND DIAGRAM 97 RAC 25WSPA RAC 35WSPA SPECIFICATIONS TYPE DC INVERTER INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT mpi INPUT W 375 65 1 620 585 65 2 250 830 65 2 450 TOTAL AMPERES AMPERES 2 10 2 00 3 10 3 00 4 30 4 10 onem 0 2300049 0 60 4 80 820 080 58 0 60 5 80 4 00 0 60 6 60 B T U u 7 820 2 040 16 320 10 880 2 040 19 720 13 600 2 040 22 440 780 792 780 792 DIMENSIONS bin uH 3 w no ze s waw s w
112. ING APPLICABLE MODELS REVERSING VALVE COIL 81 80 20 RAC 18 25 35WSPA REACTOR 5 3 MH 67m Q RAC 18 25 35WSPA FILM CAPACITOR 400 RAC 18 25 35WSPA RAS AW 015 018e 20 2008 1 28 16 03 COMPRESSOR Compressor Motor Specifications APPROVED MOTOR VOLTAGE DC VOLTAGE YELLOW RESISTANCE VALUE RED X YELLOW V CAUTION When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed or with too little refrigerant check the color of the refrigerating machine oil inside the compressor If the color has been changed conspicuously replace the compressor 30 WIRING DIAGRAM MODEL RAK 18 25 35PSPA RAC 18 25 35WSPA A CAUTION The marked parts very important ones for safety INDOOR UNIT cH 6 RED 0 0 E CD GREEN amp YELLOW lt CNO CN3 WIRED REMOTE CONTROL HEAT EXCHANGER iem CONTROL P INDICATING RECIEVER 1 P W B WIRELESS REMOTE CONTROL CN6 ONT 000000000000 000000 123456789101112 1123456 WIRING DIAGRAM NOTE 1 Connecting cable 1 5mm dia x2 C D line is used for the connection OUTDOOR UNIT DIAGRAM COMPRESSOR WET WHT YEL N YEL RED RED B OUTDOOR FA
113. ITOR COMPRESSOR EU125XB2 COMPRESSOR MOTOR CAPACITOR NO OVERLOAD PROTECTOR YES OVERHEAT PROTECTOR YES N N N RAC 18WSPA MODEL RAK 35PSPA FUSE for MICROPROCESSOR SERVICE SWITCH YES TRANSFORMER NO O THERMOSTAT YES IC NO REMOTE CONTROL SWITCH LIQUID YES NO CRYSTAL REFRIGERANT CHARGING UNIT MEME 13309 Refrigerant 410A PIPES MAX 20m WITHOUT REFRIGERANT BECAUSE COUPLING IS FLARE TYPE MIN 5m 6 RAS_AW_001 014en Figure showing the installation of Indoor and Outdoor unit MODEL RAK 18PSPA RAC 18WSPA RAK 25PSPA RAC 25WSPA RAK 35PSPA RAC 35WSPA 3 1 above 50mm Be sure to completely seal any gap with putty e o 8 8 T E cu E plug Procure locally 5 E mod The indoor piping should be E E insulated with the enclosed E insulation pipe If the insulator is 25 insufficient please use commercial 2 products The refrigerating machine oil is easily affected by moisture Use caution to prevent water from entering the cycle The difference in height between above 200mm E the indoor and outdoor unit E St mntwfen E should be kept below 10m installed on the E x above 50mm The connecting pipe no matter ceiling of balcony mde 2 big or small should all be 8 _ insulated with insulation pipe and c Sill Jy c8 possibl
114. JI gt lt S gt JOxeoJq SLNIOd SNIMOT1IO4 X j pue eui 401 eseejd _ __ Buunp ejouM eui 1291044 OL SLNIOd DNIMO1104 2 SDIANSS NSHM ALNVYYVM ANV 5 S31VS H21JV 19205 1 WSSU pue eui PUNO si 10 JI EIL JO YOOUS Jo 194205 y 1ou si amod y vy 94908 991 Memes si Olid demon em JI ces peuoeai eq jou Aew woo 1eseJd y 10 eui ui ejdoed Auew sun eui woo e jueseJd OU e Buisneo esdejjoo y pue 9NINHVM JO seu yun y 10 15592 X pejsni sey owed y 2945 euin eui eulos
115. L NC Utvtb5 mRU 5y R24 A 32 CIRCUIT DIAGRAM MODEL RAK 18 25 35PSPA
116. N MOTOR CN21 BLU Pu 12 ju RED WHT BLK REACTOR CN22 BLU N04 mv m ERN TAB WHT YEL F4 CNIQ OUTDOOR 3 15 FUSE V LCT TEMPERATURE THERMISTOR ACTIVE cts tes toby FAN MOTOR FILTER I SPP 4 4 CIRCUIT ong N C003 C024 BLK THERMISTOR 5 8 OO RL RL3 amp ROO POWER 3 15 FUSE cng WHT THERMISTOR LT ROIO 026 C027 0 SWITCHING quo Ez EEPROM 8004 el Pr LOCH REVERSE 22 POWER RED UL 0008 SUPPLY E WHT DBI C0 10043 R009 1002 TEST 6003 CN18 0007 C006 N WET 15 EXPANSION RED VALVE FI vs 208 51 R003 F SE 100 p pz MS AS BLK BLACK JGRNT 5 GRM4 BLU BLUE T BRN BROWN BLK WHT RED TERMINAL TERMINAL GREEN L A N B D GRY GRAY T TM gt BOARD GRN BRN YEL YELLOW POWER SOURCE 8 10230 5082 INDOOR UNIT l WIRING DIAGRAM OF THE PRINTED WIRING B
117. OARD Remote controller RAR 5E2 e c5 0 COM 1 HITACHI HITACHI BATO LastThisYearDay Month OFF LastThisYearDay Month _ 1 A ERROR a El Elan 5 17 SEGi7 ceo HE SWB 5W107 SW MA 2969 canes p gt lt i E A ene Cae aan C34 ran ruri SWF SWG SWH SWI CH CH CH CH as e ue eo KIO WEEKLY LL sit sm CO CO CO SEGIB x 5 619 SEG 19 SNO 09 C94 C9 SEG20 SEG20 TP_GND SEGO1 621 SCEO 1 87 S622 5 682 SWZ SW8 SW3 SW4 o 62 o 05 56024 ______5 62 _____5 60 5 62 SEG 25 ERIS ONG SMS Co CH CH Bs 52626 5 62 CN CONE BATO POWERFUL MODE SILENT _ 3 Mon Sun IC2 6 VOUT R27 BATO i TIME 560 C13 T C12 C 3 4 ON OFF copvreast C14 TP3 B4 BAT E 85 ms Y x BAT 22 TR4 T 7 R29 Re g M 99 TP1 TP2 1 f Th LED1 QO otk R7 fo _ 5 EEPROM 810 R11 IC6 gt R14 di BATIS 165 C7 406 1fouT 5 e wp Sit 64 a 2 HER C6 3 GND 4
118. OFF and set the remote controller STOP position No indication status 2 Turn the circuit breaker ON 3 Set the remote controller COOL and to be set 32 and press th CD button while pressing th Jof temperature buttons gt Transmission 4 The main unit makes the receiving sound Pi and becomes the defective indication mode Timer lamp goes on and off but if the unit has no memory the indication is not shown 5 Finish after turning the circuit breaker OFF Please turn OFF once without fail Clear method for data of defective mode Proceed the re indication of defective mode proceed without fail after having the re indication do not operate the remote controller except for indicated ones Turn the circuit breaker OFF Continue OFF more than 5 seconds Turn the circuit breaker ON Set the remote controller HEAT and to be set 16 C and press th button while pressing th V of temperature buttons gt Transmission Finish the clear after having the receiving sound Pii of one second Turn the circuit breaker OFF and finish Please turn OFF once without fail Notes e This function is valid only once right after switching ON the power and does not work if other remote controller operation was made prior to it Take note that this function may not work when not following the above procedures If it does not work switch OFF the power and try again e f nothing is stored in the memory
119. PA RAC 18 25 35WSPA COOLING CYCLE COMPRESSOR S TANK O CONDENSER VALVE V EXPANSION VALVE U lt P gt STRAINER 25 VALVE 04 e 4 HOT GAS PIPE HEATING CYCLE COMPRESSOR CONDENSER REVERSING VALVE gt 3 VALVE EXPANSION VALVE Ej cem 28 VALVE ro I IQ CET i HOT GAS PIPE d i INDOOR UNIT INDOOR UNIT 69 69 Procedure for Disassembly and INDOOR UNIT RAK 18 25 35PSPA 1 Front Panel 1 Pull up the washable panel by holding it at both lower sides with both hands 2 When the panel opens full push the inner part of the right arm into the inside and pull the panel forward while closing it gradually Sn Fig 2 2 Front cover 1 After removing two screws pull the center of the front cover forward and release the claws 2 Hold the front cover at both lower sides and pull them forward to remove CET HH Ir uuu i jn f Fig 3 3 Control P W B and Indicating P W B 1 Remove each connector from the lead wire 2 Remove the four P W B supports from the control 3 Pull the support hook at the upper side of the indication lamp of the indicating P W B and pull out the P W B forward Support hoo EL gt Indicating P W B Fig 4 4 Tangenti
120. PRESS AND HOLD TEST SERVICE SWITCH FOR ISEC OR MORE TO START 3 PUT THE POWER ON AND OPERATE INDOOR UNIT T 7 OUTDOOR UNIT IN COOLING OPERATION IN ORDER TO PREVENT PARTS FROM WITH VENTILATION MODE MOVEMENT EITHER NORMAL OR ABNORMAL Z__ OVERLOAD LOWER 1 OBSTACLE SURROUND gt 1 REMOVE THE OBSTRUCTION DAMAGE DO NOT OPERATE THE OUTDOOR UNIT FOR MORE THAN 5 MINUTES n 4 CHECK RESISTANCE VALUE BETWEEN PIN TERMINAL AT CONNECTOR MT CUT 3 PRESS AND HOLD TEST SERVICE SWITCH FOR SEC OR MORE TO STOP THE MINUTES SWITCH FOR SECOND OR MORE AREA THE RESISTANCE BETWEEN PIN TERMINAL SHOULD BE WITHIN d OTHE 0 CHE SERVICE OPRATION WITHIN 3 MINUTES 0 5 T THERMISTOR DUE TO OPEN CONNECTOR gt INSERT THE CONNECTOR 4 REPEAT STEP TO 3 IF SERVICE OPERATION NEED TO BE REPEATED SELF CHECK RESULT WILL DISPLAY 1230 SEE THE ABOVE eU TO 30 Uhn BLK BLACK oo aul EMPERATURE 2 LEAKAGE OF REFRIGERANT gt 2 CHECK THE CYCLE PIPE AND SELF D 301 SEE T T T BLU BLUE RECHARGE THE REFRIGERANT TABLE SELF CHECK DIAGNOSIS RESULT FOR THE DETAIL BACK THE OUTDOOR FAN CONNECTOR ONCE FINISH DO INSPECTION eee BLK BRN RED as 3 OTHER CAUSE lt gt 3 CHANGE ODU CONTROLLER 6 SWITCH OFF POWER SOURCE THEN RELEASE BACK JWOO1 AND TET aT GRN GREEN ZL A NOB TERMINAL p TERMINAL A THERMISTOR _ CONNECTOR INSERT MISS
121. RNI 131 02301 5 271608 5320 sik ix c 36 100 mol2 1k 5x 42 100 R659 tok 5x l 16 C M Rott 560 5x M 64 1608 033 RNI 115TE85L C M 98 10211 SIR 349T3F 1913 C M L7 i608 R321 tk 5 M 1005 5x 1 16 c 35 1009 RO60 10K 5 M k 5x 174 m 3218 C328 05 16 C M 88 1005 C631 150 C C 82 009 B 0333 DTATI4EE C M 1914 M 1608 322 1x C M 371004 R614 k sx 1716 C M 1005 R661 10k 5x 1716 C M 2k 5x M 1005 0334 KTC38768 C M 99 R323 10k 1x 16 37 1005 R615 5 C M 35 100 R662 5x l 16 C M 5x C M 14 321 6332 0 192 80 F R M 67 0642 C C 88 1008 R324 25k 1 1716 c m 38 1005 mere 5x 1716 c 35 1005 Reo3 5 i 16 C M R915 620 5x 1710 c 30 1608 C333 16 c c M 1005 0521 DTC114EE M 07 Ehotu Coupler gt Over Current Frotecter R325 1 M 37 1005 R617 5x 1 16 c 1 R664 5 1716 C M C334 16 C 6 M 2005 650 0 50 C C M 1608 B FEES MORE T WIRE R326 5 1k 5x 1 16 c 40 1005 Roerei 5 C M 35 1008 R665 5x M R
122. STOP BY gt AUTOMATICALLY RE START CURRENT CONNECTOR AND REACTOR CNo2 N24 2 SEC LIGHTING AND 0 3 SEC LOCK ERROR STRONG REVERSE WIND AFTER WIND BECOME WEAK ABNORMAL CONNECT IT PROPERLY LIGHTS OUT REPETITION OVERLOAD OPERATION NORMAL OPERATION 2 PROPELLER FAN LOCK gt 2 REMOVE THE OBSTRUCTION 7 TIMES CHECK THE COMPRESSOR an 2 TIMES 3 OUTDOOR FAN MOTOR LOCK gt 3 CHANGE THE FAN MOTOR PWB TM ABOVE ARE OK CHANGE F4 0 OUTDOOR DURING STOP 4 OUTDOOR FAN MOTOR OK gt 4 CHANGE ODU CONTROLLER HE ODU CONTROLLER 3 pem TEMPERATURE 2 SELF DIAGNOSIS BLINKING MODE BRINK OFF READ ERROR OUTDOOR UNIT CONTROLLER FUSE F4 FUSE NP V MAIN 4 NM SHEER TT ERE IS Logo SELE E VOLTAGE 1 ABNORMAL OUTDOOR 1 CHANGE ODU CONTROLLER ME VOLTAGE MD TAE N gt L E L 1 4 RED 2 T HON TO REBALR pg ABNORMAL CONTROLLER 10 TIMES gt FOLLOW STANDARD AC 2 ABNORMAL COMPRESSOR L04D 2 CHECK THE COMPRESSOR CASE OF THE DIFFICULT TO JUDGE THE ABNORMAL WITH UL MICE ERU a mm STOPPE BY HIGH LORD STOP I SERVICE VALVE CLOSE gt CHECK SURVICE VALVE OUTDOOR ELECTRIC BOX OR THE COMP BLINKING IN 2 3 4 WORT gt CHANGE i poe T 3 15A FUSE INDOOR THERWO 1 NO NEED TO CHECK NOT ANY MALFUNCTION OR 5 TIMES SELF DIAGNOSIS IN THE STOPPING STATUS E REL
123. TDP TDP REE 8 cmo WMAX peo ____ 3000 2400950 3000 3000 WMIN 0 Notes 1 The defrosting inhibit period is set as shown in the diagram below When defrosting has finished once the inhibit period is newly set based on the outdoor temperature when the compressor was started During this period the defrost signal is not accepted 2 If the difference between the room and outdoor temperature is large when defrosting is finished the maximum compressor speed WMAX WMAX2 can be continued for 120 minutes maximum 3 The defrosting period is 12 minutes maximum 4 When operation is stopped during defrosting it is switched to auto refresh defrosting b Auto refresh defrosting cannot be engaged within 15 minutes after operation is started or defrosting is finished Setting Defrosting Inhibit Period DFTIM OT DFTIM OTP 10 DFTIM OT PO Outdoor temperature Notes 1 The first inhibit time after operation start is set to DFTIM FST 2 From the second time onwards the inhibit time is set according to the time required for defrosting Reverse cycle operation time 2 DEFCOL DEFTIM COL is set Reverse cycle operation time DEFCOL The time corresponding to outdoor tempera ture is set Heating Sleep Operation 0 5 hr 7 hr thr 7 hours NENNEN Sleep shift value for setting temperature High SLEEP button O
124. The powerful operation is for 20 minutes after setting 3 Operation is continued forcibly thermo ON for 20 minutes after the powerful operation is finished 4 Pressing the START STOP button and POWERFUL button during powerful operation wil cancel the powerful operation 5 If the sleep timer is set during powerful operation the powerful operation will be canceled 6 If the differential the room temperature the temperature setting is the differential Z 3 C after powerful setting the compressor s maximum speed during powerful operation will be set to SDMAX Then the differential reduce the differential S 2 33 C during powerful operation the compressor s speed will be set to SDRPM If the differential the room temperature the temperature setting is the differential lt 3 C after powerful setting the compressor s minimum speed during powerful operation will be set to SDRPM 7 The fan speed increases by FNUPPW D Basic Heating Operation A td T A 9 E 8 o Heating set temperature ZEN uc remote control set temperature Dash period Stop 7 TWMAX Fan speed to auto Start stop switch Thermo judgment ER __ Defrost is Preheat released E Preheating ECT _____ ___ mj will 1 aS
125. WARNING Compressor Indoor Controller motor lc DC35V Oron Remember that e S ovine voltage of 175 V is applied to the OV line on the P W B or the like as shown in the right diagram A Voltage at point Point B OV line Always keep your hands and metallic things away WARNING from the cabinet DANGER Dont install When using an the ground oscilloscope never line ground it Don t forget that high ij voltage as noted in me the figure above ma WM apply to the oscilloscope A 22 2 22 Up un 2 i N 2 69 Procedures for Electrical Discharge and How to Stop Energizing the Power Circuit N WARN ING ZN Caution e Voltage of about 320 360V is charged between both ends of smoothing capacitors eDuring continuity check for each part of circuit in outdoor electrical parts be sure to discharge smoothing capacitor to prevent secondary trouble 1 Turn OFF power supply to the outdoor unit 2 After power is turned OFF wait for 15 minutes or more Then remove electrical parts cover and apply soldering iron of 30 to 75W for 15 seconds or more to DC voltage and DC voltage terminals in order to discharge voltage in smoothing capacitors Do not use soldering iron with transformer If not theral fuse inside the transformer will be blown As shown in this figure apply solder
126. WROO1 9 D 0332 L301 m EN Ld 3 The real assemble KIBAN as follows CJ301 6 0 0 0 0 0 0 0 ICN16 ON oV r It o lin 3 peo FORM MINI Th osos T Star Sasso Ez eom n OS TCD OSOSO M MAIN KIBAN PH 3P Top amp S 02 ac actas acto H E KIBAN c 2 EE AAA n 3 5 P7 Ge 65 P31 ER 7 281 801 6 CE 6321 e HEV 5 m 579 ZIA E E ele lelle L CN 5 PH 5P Top 35 lZ OV R321 Z 5 IL E 5 LED 5 E 5 54 1 3al a lal lal al lal b 15 gt 5983 ME ves AZDINPUT SIR EISE E P54 R640 3 M Auto swee gt DC FAN 815 5 T gt P p R 5 P53 R639 4 Motor RNY gt 31 Anp CHANGE un use 5 01 914 un use Toe P51 R637 5V Heat Exchanger CNI REYS 5 FLURESE 8 un use e 0v 4 5 PGS 50 Thermistor 4P Top UD RO36 12V C615 eoh sr e 351 5 e e mr li REMOTE CONTROLLER SET WIRED REMOTE CONTROLLER 1091 RON t e y 8 INDOOR FAN SINGAL _ 6 lt gt
127. ace circuit is faulty when power is supplied the self diagnosis display will not be displayed 2 the indoor unit does not operate at all check if the connecting cable is connected to the outdoor unit 3 To check operation again when timer lamp is blinking you can use remote control for operation oe except for mode mark 1 RAS AW 063 082e 74 a SELF DIAGNOSIS LIGHTING MODE MODEL RAC 18 25 35WSPA 1030 SELE SELF CHECK DIA
128. acle without releasing the lock can cause a damage Furthermore during connecting the receptacle back make sure to securely insert until end e Receptacle type and procedure to releasing the lock Insulation sleeve en Release button button Release button Vertical type with plastic casing Vertical type without casing Horizontal type with insulation sleeve Pull out by holding the Pull out while pushing plastic casing Pull out from top of insulation sleeve the release button while pushing the release button 2 Disconnecting on board connector On board connector with lock machanism are widely used Please take note that by using a force to pull out with out releasing the lock mechanism can cause a damage Furthermore during inserting back the connector make sure it surely done Release lock with finger before disconnecting 3 Connector disconnection during discharge is prohibited Disconnecting connector during discharge is extremely prohibited Component on board and fan motor will damage Proceed trouble shooting process after confirming smoothing capacitor of indoor amp outdoor pwb has been discharge 12 THE SUPPORT FUNCTION OF FAILURE DIAGNOSIS Self diagnosis indication function The timer lamp indicates a mode of failure detected Indicating a failure on the indoor on the indoor or outdoor unit side by blinking unit side
129. al air flow fan and fan motor 1 Remove two screws locking the drain pan 2 Press to lower the hook at the center of theunit a little and pull the claw forward to removethe drain pan 3 Remove the lowerbearing covers 4 Remove the locking hook of the lower bearingcover from the Cabinet g NY N NE Lower bearing cover Cabinet Fig 6 b Remove the screws that fix the bearing cover to the left of the evaporator 6 Lift the left side of the evaporator pull it towards you and detach the lug of the bottom of the bearing cover 7 Remove the screws that fix the fan motor retainer 8 Push the bottom of the evaporator upwards and remove the lugs of the fan motor retainer 9 Loosen the fan fixing screws and remove the fan Fig 7 Upper bearing cover F SS 2 10 Remove the rubber dampers from the left and right sides of the fan motor 11 Turn the fan motor towards you thereby removing it 48 OUTDOOR UNIT MODEL RAC 18 25 35WSPA 1 Electrical parts 1 Remove the service value cover lock screws and lower the cover to remove it 2 Remove the top cover lock screw and raise the cover to remove it Fig 9 3 the front cover lock screw 4 Lower the right side of the front cover and pull it forward Then remove the cover from the hook 5 Pull the right side of the front cover a little and pull up the
130. cate with outdoor unit PROCEDURE INFO 1 While pressing and holding INFO button and COPY PASTE button press reset RESET button on the same time Release are indicated then release the INFO button and COPY PASTE button Remote controller now enters DISPLAY OPERATION MODE for the indoor unit to run independently Please ensure that when pressing POWERFUL __ MODE SLEEP Ax m SR 5E1 8 0 LastThisYearDayMonth OFF ERROR FILTER D kWh EO S RT THA hp _ RESET button only and make sure that all marks on the LCD display button will blinking bu EZ will blinking blinking 10 seconds indicate MODE 2 Pressthe MODE selector button to choose the desired operation mode 3 Press T START STOP button Then the indoor unit will starts to operate independently accoring the selected operation mode NOTE Year A G IF i CZ blinking 1 During DISPLAY OPERATION MODE c blinks on LCD of remote controller 2 When operation stops DISPLAY OPERATION MODE is canceled 94 JUDGING BETWEEN GAS LEAKAGE AND CHECKING THE REFRIGERATING CYCLE COMPRESSOR DEFECTIVE 1 Troubleshooting procedure No operation No heating No cooling Lighting mode a set 2times times 4 times 5
131. cates the shift value is now at the initial setting 91 SETTING THE PREVENTION OF MUTUAL INTERFERENCE FOR REMOTE CONTROLLER Applicable for Remote controller model RAR 5E1 RAR 5E2 RAR 5E3 RAR 5E4 and 5 5 Case 2 sets of indoor units installed near to each other If both indoor units can receive the same remote controller signal please set the remote controller as below This setting will change the signal address of each remote controller Initial remote controller signal address setting is A This procedure change the remote controller signal address from A to B 1 The circuit breaker for the other unit shall be OFF 2 Slide the remote controller cover to take it off 3 While directing the remote controller towards the receiver of the indoor unit press 1 6 amp TIMER button ON TIMER button and REsET RESET button simultaneously The remote controller perform signal transmission with the device Signal transmission From A to B POWERFUL MODE SILENT OFF E b b aro SSLEEP ERROR FILTERI i D OZAT CLEAN LeaveHome Seq PIB Vs soe 298882 QI H RESET S 2 amp RAR SEI ock 4 The indoor unit beeps Pip to indicate that it has just received the signal from remote controller 5 Please check the usability of each set of ind
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134. e is CMAX or higher Cool Dashed will release when i a maximum 25 minutes is lapsed and ii room temperature is lower than set temperature 3 thermo off and iii when room temperature has achieved setting temperature 1 then maximum Cool Dashed time will be revised to 20 minutes And iv indoor fan is set to Lo and Med fan mode and v change operation mode During Cool Dashed operation thermo off temperature is set temperature with shift value 3 After thermo off operation continue in Fuzzy control mode Compressor minimum ON time and OFF time is 3 minutes During normal cooling mode compressor maximum rpm CMAX will maintain for 60 minutes if indoor temperature is lower than CLMXTP No time constrain if indoor tem perature is higher than CLMXTP When fan is set to compressor rpm will be limited to CSTD When fan is set to compressor rpm will be limited to CJKMAX When fan is set to Lo compressor rpm will be limited to CBEMAX During Cool Dashed when room temperature reaches set temperature 1 compressor rpm is actual rom x DWNRATEC 38 Cooling Defrost Indoor heat exchange temperature TEION lil Cooling defrost signal See basic operation See basic operation Indoor fan Outdoor fan Balance period Reversing valve heating mode Compressor speed POWERFUL setting Temperature setting PWSFTC Co
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136. emote controller set to Heating operation indicated by 297 Turn the circuit breaker Set the room temperature setting on the remote controller to 16 C by pressing the TEMP or button While directing the remote controller towards the receiver of the indoor unit press TEMP button and START STOP button simultaneously The remote controller perform signal transmission with the device The product beeps for a second Pi to indicated thatit has justreceived the signal The data has now been cleared lt How to display error code in case of failure just occurs gt If timer lamp of the indoorunitblinking and operation stops please perform below procedures 1 INFO Direct the remote controller towards the receiver of indoorunit within 2m in frontof the indoorunit and press INFO button 2 Wait for 2 seconds for signal transmission 3 Indication of error code will be shown on the remote controller display for 10 seconds For example m Li For details information regarding error code please refer to page 77 16 TIMER LAMP BLINKING LD301 BLINKING CODE MEANING DETAILS e 001 When the indoor heat exchanger temperature is 1 time e cooling mode It is not failure Outdoor unit is in forced Outdoor unit is under forced operation operation or balancing operation after forced operation 2 times 009 Room thermistor or heat e
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138. face signal from the outdoor unit is 1 Indoor interface circuit 00 indoor and outdoor units interrupted 2 Outdoor interface circuit 1 Room thermistor 2 Heat exchangerthermistor 1 Indoor interface circuit 2 Outdoor interface circuit 3 Indoor control P W B 013 CAO T data reading error When data read from IC401 or 1 1C401 or IC402 abnormal 00 1 402 is incorrect 1 Compressor 2 P W B s 1 P W B s 2 Compressor 004 Fail to switch from initial low frequency sync to 1 P W B s 4 times Compressor switching failure i 01 position detection sync 2 Compressor 1 Outdoorunit is exposed to direct sunlightor its air flow blocked 2 Fan motor 3 Fan motor circuit 4 The voltage is extremely low 1 Leak of refrigerant 2 Compressor 3 OH thermistor circuit 4 Fan motor 5 Fan motor circuit 1 Thermistor 2 Connection of thermistor is faulty 3 Thermistor circuit Pues on ee 1 Cable is wrong connected 2 Cable is open 3 Interface circuit between indoorand outdoorunit 1 Power supply voltage 2 Receptacle of wire for P W BIPM is not properly inserted Faneton for etrone wind Fan motor load is too heavy 1 Fan motor P or rotation disturbed by wind blow 2 Outdoor condition wind Esrumiotor fault Outdoor fan rpm is not 1 Fan motor u rotate as intended rpm 2 Fan motor circuit EEPROM reading error Microcomputer cannot read 1 P W B main B the data in EEPROM
139. fan rotation by inserting material into propeller fan or ice has growing inside outdoor unit caused by snow Remove it if found something is bloking the fan 2 Confirmed that CN24 connector is securely inserted Fan lock stop is detected also when connector is not properly inserted Please securely insert if found any disconnection 3 Fan lock stop also can be detected where strong wind blown surrounding the unit Please confirm after restart the unit It may take few minutes to operate the compressor It is not a malfunction of electrical unit or fan motor if the unit run continuesly after restart the unit 4 Check fan motor condition as below procedure Checking Fan Motor procedure Shut down supply and wait for 10 minutes for voltage to go down Confirm it by measuring the DC voltage must be below 10V Then disconnect fan motor connector CN24 Confirm the abnormality or lock by rotating the propeller fan manual ly Deer Measure fan motor connector resistance between pin 0 0 39 06 0 Normal value 20 50 Replace electrical unit Replace fan motor 5 Reconnect again fan motor connector CN24 XPlease confirm above checking procedure if found F4 3 15A fuse blown If fan motor is broken replace both electrical unit and fan motor Reference gt No power is supllied to the outdoor unit if F4 3 15A Fuse is blown Both DC fan motor and switching power supply is using same fuse Caution Beware of
140. g and dehumidification operation time 3 Not working of reversing valve or detection of opening of heat exchange thermistor is controlled According to heat exchange temperature the voltage of point becomes as it is shown in Fig 9 2 5V Heat exchanger Microcomputer thermistor R306 Heat exchanger input Voltage of point V 10 0 10 20 30 40 OV oV Heat temperature Fig 9 2 Do 10 Dip switch 5 6 R923 15 270 8541 a E R543 O R924 i DIP switch DSW1 Fig 10 1Dip switch Circuit e Fig 8 1showsthe dip switch circuit the table shown in Fig 10 2 are function and setting position from D 6 of the switch Switch Position Setting DISABLE 2 MI 3 CARD KEY LOGIC SELECT INPUT HIGH ACTIVE INPUT LOW HEAT AND COOL MODE SELECT REMOCON ID SELECT X 1 SELECT IDA SELECTIDB switch HEATING COOLING ONLY off OEF NORMAL COOLING ONLY 5 HEATING COOLING ONLY Fig 10 2 Functions of Di O NOTE Marking is position of shipping FACTORY default setting X 1 Weekly Timer wireless remocon for new model have function of setting remocon ID A or B This remocon using model can not operate DIP SWITCH 6 disabled by EEPROM data flag If the dip switch is set to Heating mode only Co
141. g can be raised 3 C by A or lowered 3 C by This is because Nice temperature reservation function is operating This function starts operation earlier so the preset temperature is reached at the preset time Operation may start maximum 60 minutes before the preset time It does not work It works only during cooling and heating This is because Nice temperature reservation function is operating The start time varies according to the load of room Since load varies greatly during heating the operation start time is corrected so it will vary each day This is because the preheating device is working It will not start to drive the fan until the refrigerating cycle warms up and warm air blows Wait for a while The damper does not open either during preheating or for one minute after preheating is finished The indoor fan varies among high air flow low air flow and breeze in the This is because the cool wind prevention function is operating and does not indicate a fault The heat exchanger temperature is sensed in the auto fan speed mode When the temperature is low the fan speed varies among high air flow low air flow and breeze auto fan speed mode Heating operation When operation is started the compressor rotation speed goes to maximum to increase the heating or cooling capability so noise becomes slightly louder This does not indicate a fault
142. ged initial judgment a Conditions for judgment any of the followings When auto operation is started after the previous auto mode operation When auto operation is started after the previous manual mode operation When the operating mode is switched to auto while operating at manual mode b Judging method Cooling Room temperature amp Remote controller setting Heating Room temperature lt Remote controller setting Cooling Room temperature setting of remote controller 2 Judging operating mode change during operation Continuous judgment a Conditions for judgment The mode is reviewed at interval time nterval time as below The first interval time 10 minutes The second interval time 15 minutes and after the third interval time 55 minutes b Judging method Judge by setting the hysteresis on the final preset temperature The final preset temperature is the actually targeted preset temperature which is sum of basic preset temperature and each type of shift value e g preset temperature correction value powerful shift value eco shift value eco sleep shift value etc Currently cooling temperature Final preset temperature 3 Change to heating temperature gt Final preset temperature 3 Continue cooling Currently heating Room temperature Final preset temperature 2 Change to cooling temperature lt Final preset temperatu
143. he 1200 fan motor and input to micro computer pin 68 The frequency of this pulse is 12 60 of the number of rotations Ex 1000min 12 60 200Hz The microcomputer observes this frequency and to make it as the instruction number of rotation all the time adjusts min the output pulse width of pin 45 e f the feedback pulse becomes lower than 100min 1 caused by Rotation lock or failure of a fan motor the fan output stops temporary as 0 1 2 3 4 5 the fan lock is faulty The pulse will output again after 10 seconds Voltage of point V If the abnormal in fan lock is detected twice in 10 minutes the unit is completely stopped and change to the fault mode which the Fig 3 3 timer lamp blinks 10 times ol 4 Buzzer Circuit 12V Microcomputer Buzzer output Fig 4 1 Buzzer Circuit When the buzzer sounds an approx 3 9kHz square signal is output from buzzer output pin 83 of the micro computer After the amplitude of this signal has been set to 12Vp p by a transistor it is applied to the buzzer The piezoelectric element in the buzzer oscillates to generate the buzzer s sound Metal diaphragm Piezoelectric element 77 1111111111111111111 iE EUM Sound wave V x V __ 7 7 Fig 4 2 Buzzer Operation 5 Receive Circuit 12V Q212 R216 Vout R217 R611 WIRELESS INPUT Microcomputer OV OV Fig 5 1 The light receiving
144. hose Drain cap connection port About 108 About 370 Narrow pipe 6 35 Wide pipe 612 7 RAK 18 25 35PSPA 5 is 60 60 Vertical air diflector 7 2 AN than 24 ZA 2 2 than 2300mm 21 CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAC 18 25 35WSPA OUTDOOR UNIT Unit mm 212 Handle Air suction OO x RSE 1 mU tt X SF Air suction Notch for anchor bolt for 2 08 0 bolt Service space NOTE 1 For outdoor unit installation allow at least 2 sides of space around the unit ensure ventilation flue 2 The connecting pipe should all the insulated with insulation pipe 3 Piping length is within 20m 4 Height different of the piping between the indoor unit and outdoor unit should be within 10m 28 MAIN PARTS COMPONENT THERMOSTAT Room temperature Thermistor Thermostat Specifications RAK 18PSPA RAK 25PSPA RAK 35PSPA z FAN MOTOR Fan Motor Specifications MODEL RAK 18 25 35PSPA RAC 18 25 35WSPA POWER SOURCE DC 35V DC 120 380V 120 380V OV WHT CONNECTION YEL 0 5V ES FG Control circuit built in BLU BLUE YEL YELLOW BRN BROWN WHT WHITE GRY GRAY ORN ORANGE GRN GREEN RED RED BLK BLACK PNK PINK VIO VIOLET MAIN ELECTRIC COMPONENTS FOR OUTDOOR UNIT NAME RAT
145. in counting packing and the like the handling person must always use himself as a body earth Make yourself a body earth by passing one M ohm earth resistance through a ring or bracelet 3 Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being taken 4 Be sure to place a part on a metal plate with grounding 5 Be careful not to fail to turn off power when you repair the printed circuit board At the same time try to repair the printed circuit board on a grounded metal plate Body earth Elimik conductive band Clip for connection with a grounding wire Fig 2 Body earth 6 Use a three wire type soldering iron including a grounding wire Metal plate of Al stainless steel etc Bare copper wire for body earth Working table Resistor 1MQ 1 2W US cd Earth wire Fig 3 Grounding of the working table soldering iron Grounding wire Screw stop at the screwed part using a rag plate Fig 4 Grounding a solder iron Use a high insulation mode 100V 10M or higher when ordinary iron is to be used 7 In checking circuits for maintenance inspection or some others be careful not to have the test probes of the measuring instrument short circuit a load circuit or the like CAUTION 1 In quiet operation or stopping the running slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally but this noise is not abnormal
146. ing iron to metal parts receptacle DC voltage and to discharge the charged voltage inside smoothing capacitors Smoothing Capacitors Solder ing Iron DC voltage measuring point DC voltage Smoothing measuring point Capacitor HIC ES IPM P W B IPM 70 1 STRUCTURE OF AN INDOOR UNIT ELECTRIC PARTS RAK 18 25 35PSPA ELEC COVER FT Pl at BIB SSS 1 gu FIXTURE SCREW FIXTURE SCREW Removing electrical parts 1 Remove the electrical parts cover 2 Remove the connectors from the CN1 heat exchange thermistor CN15 stepping motor and CN10 fan motor 3 Remove two lock screws e 4 Remove the electrical parts in the direction of arrow When installing the parts use caution not to pinch any code between the part and cabinet P W B SUPPORTER P W B SUPPORTER Removing control P W B Removing the indicating P W B 1 Remove the connectors from the CN12 1 Remove the connector from the CN12 on the control PW B 2 Remove the P W B from the P W B support 2 Remove the upper hook from the indicating P W B lock resin pull the P W B forward a little and remove it RAS AW 063 082e 71 Other cautions 1 Disconnection of tab terminal receptacle All recectacle used to connect with tab terminal are built with lock mechanism Please take note that by using a force to pull out the recept
147. ink 9 times after operation to indicate communica tion error 2 If checking is done with the compressor connector disconnected the unit will continue normal operation when the electrical parts are normal or it will repeat operating for approx one minute and stop due to overload power limit cut or it will operate in the overload status Be sure to return the service switch to normal after checking with service operation is completed HOW TO OPERATE THE OUTDOOR UNIT INDEPENDENTLY 1 Connect the large dia pipe side and small dia pipe side service valves using a pipe Parts to be prepared Outdoor unit Connect the small diameter 1 Reducing union service value and the large 2 arge dia service valve 2 8 6 35mm diameter service valve using the 1 2 12 7 Reducing union reducing union and copper pipe 1 2 8 and 1 2 2 Copper pipe 2 8 and 1 2 as shown on the right 3 Shorting leads 2 leads approx 10 cm long ud pipe with alligator clip or IC clip Charge refrigerant of 300g after vacuuming 1 DS small diameter Do not operate for 5 minutes service valve or more The operation method is the same as How to operate using the connector to servicing the outdoor unit 7 1 The charging amount of 300g is equivalent to the load in normal operation 96 MODEL RAK 18PSPA RAK 25PSPA RAK 35PSPA PARTS LIST AND DIAGRAM INDOOR UNIT 97 INDOOR UNIT MODEL RAK 18PSP
148. left side to remove it from the hook lt gt SS S amp S 7 a gt NS PSY LEE SSZ E S 6 each connector and earth cable from the lead wire Then remove the electrical box DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAK 18 25 35PSPA 1 Power circuit ndoor Fan 35V Motor I tr OV 12 V power supply Power supply voltage Indoor fan power supply Indoor fan PWM output Indoor fan speed feedback Fig 1 1 Power to operate indoor unit DC35V is generated at the power supply in outdoor unit and it is sent to indoor unit through the connecting cord C and D Then DC 12V 12V line is generated using DC DC converter from the voltage sent from outdoor unit as the control voltage of 12V is required to drive the auto sweep motor and others Furthermore 5V 5V line which is necessary to drive the microcomputer and to control the fan motor is generated using three terminal regulator 1 121 49 2 Reset Circuit 5V 11 Reset 2 R523 8522 icrocomputer IC521 C521 C524 C522 Fig 2 1 Timing chart Voltage 2 pin of IC521 supply voltage Voltage D pin of IC521 output voltage or D pin of microcomputer Fig 2 2 e Reset circuit is to initialize the indoor unit microcomputer when switching ON the power or after recovering from power failure e Microcomputer operates when 0 pin of
149. mes blinking Check the refrigerating cycle Check the outdoor electrical parts Check the indoor electrical parts CHECKING THE INDOOR UNIT ELECTRICAL PARTS 1 Power does not come on no operation aS Is 35V DC being generated Is 220 230V AC being Genofated Check the indoor outdoor unit between terminals C and D on between terminals L and connecting cord and correct any the terminal board the outdoor defective section wrong connec tion incomplete insertion Is 35V DC Y generated between terminals C and D on the outdoor unit terminal board V No Yes Are connection wires C and D C h bl iauarsad orrect the cable connection NO Check the outdoor unit power circuit and repair the defective section Ave control voltages 12V 5V Check according to the proper being generated normally method for checking the power circuit vrais Do the air deflectors perform Yes Check the indicating P W B initial operation when the power LL connection cord and light breaker is turned on and off receiving unit V Is the microcomputer reset input pin CD Hi o repair any defective section V Yes Is the microcomputer clock signal Don SS VAS Replace the control P W B Perform final operation check 80 2 Outdoor unit does not operate but receives remote infrared signal Set room temperature 16 C in the cooling mode or to 32 in the heating mode and p
150. mpressor speed Notes 1 Pressing the POWERFUL button will reduce the temperature setting by PWSFTC 2 The powerful operation is for 20 minutes after setting 3 Operation is continued forcibly thermo ON for 20 minutes after the powerful operation is finished 4 Pressing the START STOP button and POWERFUL button during powerful operation wil cancel the powerful operation 5 If the sleep timer is set during powerful operation the powerful operation will be canceled 6 If the fan speed of the remote controller is set to AUTO or HIGH the compressor s maximum speed during powerful operation will be set to CMAX2 The lower limit speed is CKYMIN PW 7 If the fan speed of the remote controller is set to MED the compressor s maximum speed during powerful operation will be set to CIKMAX PW The lower limit speed is CIKMIN PW 8 If the fan speed of the remote controller is set to LOW the compressor s maximum speed during powerful operation will be set to CBEMAX PW The lower limit speed is CBEMIN PW 9 If the fan speed of the remote controller is set to SILENT the compressor s maximum speed during powerful operation will be set to CSZMAX PW The lower limit speed is CSZMIN PW 10 The fan speed increases by FNUPPW C 99 Cooling Sleep Operation hr N 0 5 hr 1hr 7 hours SLEEP button un NEN Operation lamp Timer lamp Sleep shift value for setting seep gt See basi operation
151. oling mode only the wireless remote controller must be set to operation mode lock setting as indicated on page 93 04 MODEL RAC 18 25 35WSPA 1 Power Circuit P W B MAIN TERMINAL m Buc F1 25A FUSE 1004 NF COIL L005 NORMAL COIL POWER RELAY 207 4 NRUSH CURRENT RELAY 3 8 15A FUSE POWER CIRCUIT YEL TAB1 BRN TAB2 C601 061 _ R614 amp Q602 5 ACT DRIVE P W B IPM BOARD R611 V C022 M C023 M C024 X This circuit full wave rectifies 220 230VAC applied between terminals L and N and boosts it to a required voltage with the IPM to create a DC voltage The voltage become 320 360V when the compressor is operated X Importance component 1 Intelligence Power Module IPM A module that constitute by an inverter part 2 Diode Stack DB1 DB601 DB602 These rectify the 220 230VAC from terminal L and N to a DC power supply 55 Reference X In case of Intelligence Power Module malfunction or connection failure immediately after compressor starts its may stop due to error of abnormal low speed switching failure lp stop and others Reference X If diode stack DB601 DB602 are faulty DC voltage may not be generated and the compressor may not operate at all Also be aware that the 25A fuse might have blown X is faulty compressor may not operate at all Also be aware that the 3 15A fuse might have blown
152. oor unit using its own remote controller Signal transmission From B to A Note It indoor unit still not receive the correct signal from the correct remote controller setting shall be made again By setting again tor the 2nd time the signal address will change from B to A Ihen it repeat again for the 3rd time the remote controller signal address will change from A to B Please set the DIP switch No 6 to ON accordingly Refer to page 54 92 OPERATION LOCK SETTING If Dip switch position is set at Heating mode only or Cooling mode only as mentioned on page 54 it is required to set the remote controller into operation mode lock setting Without setting the remote controller it will caused unmatch signal transmission between indoor unit and remote controller PROCEDURE 1 Heating operation mode lock setting a ile pressing and holding 5 utton an utton press utton a Whil ing and holding gt ECO button and POWERFUL butt O RESET butt on the same time Release eser RESET button only and make sure that all marks on the remote controller display are indicated then release the gt ECO button and POWERFUL button Remote controller now enters Heating operation mode lock b To cancel the Heating operation mode lock repeat the above procedure 1 a LOCK is displayed MODE Selector button to select mode operation either X HEAT or amp FAN only MODE Pres
153. oot 5x 1 16 C M 35 1009 C335 16 c 6 M 005 C651 16 C C M 88 1005 0701 niil i WIRE R327 Sik 5 1 16 41 1005 molo 10k 5x C M 35 100 R666 5x 1 16 C M 6922 5x 1 16 c M 35 1009 PS2501AL 2 20 0 C M modei Hem 8326 10k 5x 1 16 35 1005 10x 5 C M 35 100 R667 5x l 16 C M R923 tk 5 C M 42 1005 __1 50 C C 185 1608 CH 6751 C M PC912 PS2501 AL 5 M 103 50 2 04 C M i 329 Ik 5 M 42 1005 R621 10k 5x 1 16 C M 35 100 R668 10k 5X l 16 C M RO24 tk 5 l 16 C M 42 1005 C693 50 C C 86 1608 CH ICP3 21008 83301 5 351009 R622 5x C 35 1009 R669 5X 1716 C M 0831 SCH1430 33 MODEL RAC 18 25 35WSPA
154. operation check 8l 3 Indoor fan speed does not change others are normal Yes Can the fan be stopped by gt The microcomputer fan PWM gt remote control output pin is Hi No Yes Replace the microcomputer Replace the indoor fan motor Replace the microcomputer Perform final operation check 4 Air deflector does not move others are normal Are pulse signals output at microcomputer pins when No MM fan mode Yes Is a voltage over 15V or below 10V being generated on the 12V gt Replace IC111 gt line No Replace the microcomputer Check IC711 If it is normal replace the air deflector motor Perform final operation check 5 All systems stop from several seconds minutes to several after operation is started all indicators are also off Set to the Hi fan mode The operation lamp lights once and goes out in 5 10 seconds Yes Disconnect CN10 and set to the fan mode again Yes Check to see if shorting etc The operation lamp lights once and goes out in 5 10 seconds 7 has occurred in the P W B pattern No Can the indoor fan be lightly turned by hand fan is Set the power switch to off to check g eic If it does repair j Yes Heplace the indoor fan motor 6 Checking the main P W B power circuit Is 35V being output at pin No Check whether the connection cable is D relati
155. or speed controller during starting Due to the interference of strong wind etc operation movement is changed based on fan direction and rotation speed as shown below during starting of operation In addition the fair wind is define as wind that blow to outside direction using Mouth Ring part At strong and contrary wind The rotational speed is not controlled as to protect the equipment and fan will rotate reversely depend on the wind Automatically start when wind condition become weak At contrary wind The rotational speed is controlled in fair wind direction after it slowly reduce the speed and finally stop At fair wind rotational speed is controlled as it is At strong fair wind rotational speed is not controlled as to protect the equipment and fan will rotate reversely depend on the wind Automatically start when wind condition become weak 2 Fan motor speed controller during unit operating here is a case where fan rpm is reducing during rotating caused by interference of strong wind If this condition continue in long period fan will stop rotating LD301 11 times blinking The unit will restart according to control as per during start 1 61 3 Method of confirming self diagnosis 0301 lamp 12 times blinking If the unit stop and LD301 on the pwb blinking 12 times fan lock stop is detected follow below steps to confirm it 1 Fan lock stop is detected when something has disturb the
156. outdoor temperature in relation to the voltage Table 4 1 Voltage at both side of R303 V 1 69 2 23 2 75 3 22 3 62 lt Reference gt When the thermistor is open open condition or disconnect microcomputer pin 65 67 are approx OV When thermistor is shorted they are approx 5V and LD301 will blink 7 times However an error is detected when only the OH thermistor is shorted and will enter blinking mode after 12 minutes start the compressor operation 09 5 Electric expansion valve circuit 5V B 12V 12 rr B 12V ELECTRIC R418 EXPANS ON 5 O Microcomputer Soo Ere 22 12 G GAValve A4 II 1i lt 25 13 lt 4 32Walve A3 IT LA LOB Wm TOT lt 2 7 6 PNE 25 15 lt 2 29 Valve Al CN15 RED MER R222 6 M 5 2 R4123 R411 Fig 0 e he electric expansion valve is driven by DC12V Power is supplied to 1 or 2 phases of 4 phase winding to switch magnetic pole of winding in order to control the opening degree e Relationship between power switching direction of phase and open close direction is shown below When power is supplied voltages at pins 4 to D of CN15 are about 0 9V and 12V when no power is supplied When power is reset initial operation is performed for 10 or 20 seconds During initial operation measure all voltages at 4
157. peration lamp Timer lamp Medium __ Indoor fan Lo See basie Silent operation sep 7 operation FAN S H Outdoor fan Shut FUDIWAR1 2 M Notes 1 The sleep operation starts when the SLEEP button is pressed 2 When the sleep operation is set the maximm compressor speed is limited to WSZMAX and the indoor fan set is sleep FWSOY P 3 The indoor fan speed does not change even when the fan speed mode is changed Compressor speed 4 If sleep operation is canceled by the cancel button or sleep button all data is cleared 5 1 hour after the sleep operation is set the sleep shift value OYSFTW is reduced Heating Powerful Operation Clean Operation CLEAN operation period 60 CLEAN button Heating mode mode period Fan mode Fanmodeperiod Blinking Lights for 0 5 sec at interval of 0 5 sec Operation lamp E PWSFTW Indoor fan Outdoor fan Shut Horizontal deflector FUDICLN1 FUDICLN2 CLNCPW Compressor speed Notes the POWERFUL button will reduce the temperature setting by PWSFTW 1 During CLEAN perad heating mode will change to fan mode when HEX temparature is CLNEVP or more DOW CHIL GP 2 ate is limited to fan mode 3 Operation is continued forcibly thermo ON for 20 minutes after the powerful operation is finished 4 Defrost is inhibi
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160. r to choose the desired operation mode that is required for shift value setting temperature modification To change the shift value for COOLING mode operation select either HIGH MED FAN SPEED To change the shift value for HEATING mode operation select either LOW or SILENT FAN SPEED lu uu EN o SILENT re m X HEAT COOL E NEL ft blinks blinks Step 1 Step 2 Step 3 5 Press the TEMP or button to change the shift value The shift value changed with device beep sound Transmission sign lights up with beep from device simultaneously Cop oos s te amp te Decrease 3 C Decrease 2 C Decrease 1 C Increase 1 C Increase 2 C The initial Increase 3 C from the initial from the initial from the initial PEE from the initial from the initial from the initial shift value setting shift value setting shift value setting gt shift value setting shift value setting shift value setting NOTE 1 The displayed shift value XX HEAT t COOL symbol on the remote controller display will be disappear after 10 seconds 2 The changed shift value will remain unchanged after turned off the power 3 If O is displayed on the remote controller display it indi
161. re 2 Continue heating 3 Cooling Heating final preset temperature 2 Same as at left Performs the sleep operation of each operation mode le Lo _______ 77 _____ Notes 1 The speed set of rotaion for the fan motor in each operation mode are as shown in Table 1 2 The set room temperatures in the diagram include the shift values in Table 2 36 _ Table 1 Mode data file fi00min i 1100 i100mi i _ 37 RAS AW 024e Basic Cooling Operation N Room temperature P ene dil Prae L coo p eee Temperature set for cooling and lt lt N AO dehumiditying value set by remote _________ control Sto Start stop switch ERE P Start Stop d Thermo judgment ATCMAX LL Ultra Hi _ DENN I M Indoor fan Hi o ES Lm ___ ___ LLL uud in the set fan speed in cases other than auto fan speed m min ji 5 Operation lamp Dew o Max e w Rating e 3000 HEN Min Tesi fan 3min Notes 1 2 Condition for entering into Cool Dashed mode When fan set to Hi or Auto and when the compressor speed P section due to temperature difference between setting temperature including the correction shift only and room temperatur
162. recovered at 18 33 C When the compressor is running at maximum speed during hot dash or when recovered from defrosting Heat exchanger temperature N 35 0 IN 30 0 I 26 0 _ 1b 23 0 Z A High or ultra High i Low i Fan speed set to Silent sd In modes other than AUTO Set to Silent Lo Med Hi Ultra Hi or Stop depending on the room temperature and time Set to Stop if the room temperature is 18 C in the Silent mode other than during preheating cooling is recovered at 18 33 C Set to Ultra Hi when the compressor is running at maximum speed during hot dash or when recovered from defrosting Set to Silent Lo Med or Stop depending on the room temperature and time Set to Stop if the room temperature is 18 C in the Silent mode other than during preheating cooling is recovered at 18 33 Set to Silent Lo or Stop depending on the room temperature and time Set to Stop if the room temperature is 18 C in the Silent mode other than during preheating cooling is recovered at 18 33 The fan speed is controlled by the heat exchanger temperature the overload control is executed asin the following diagram Heat exchanger temperature See page 42 Same as at left e 42 Operating mode is judged by room tempertature 1 Judging by room temperature Operating mode at start up is jud
163. ress the start stop button Hemove the outdoor unit cover and electrical parts cover and check self diagnosis lamp LD301 Check the room temperature thermistor if it is defective replace it normal values 10 approx 20 25 approx 10kO 30 approx 8 HIC TEST SWITCH LD303 LD302 LD301 Check the heat exchanger Yes thermistor if it is defective replace it lt normal values gt 10 approx 20 25 approx 10kO 30 approx 8 P W B Control Does LD301 blink one time Repeats 0 25 second on and 2 second off Timer lamp blinks nine times Yes Does outdoor electrical part gt Communication circuit Check outdoor electrical parts self diagnosis is does by the and repair any defective parts operation of the remote control around the outdoor interface ler transmitting circuit LD301 blink nine times As for the diagnosis result Timer Lamp blinks three times Check indoor electrical parts and repair any defective parts around the indoor interface transmitting circuit Check outdoor electrical parts Does LD303 switch several and repair any defective parts seconds after it lights Perform final
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165. s CANCEL 10 seconds indication on the remote controller display 2 Cooling opearation mode lock setting a While pressing and holding E ECO button and J SILENT button press button on the same time Release nese RESET button only and make sure that all marks on the remote controller display are indicated then release the Es ECO button and SILENT button Remote controller now enters Cooling operation mode lock b To cancel the Cooling operation mode lock repeat the above procedure 2 a LOCK is displayed MODE Pres jJ MODE Selector button to select mode operation either COOL 48 FAN or y DEHUMIDIFY only CANCEL 10 seconds indication on the remote controller display NOTE 1 The indication of Lock and 3 HEAT zt COOL FAN DEHUMIDIFY mode operation symbol on the remote controler display will disappear after 10 seconds and it will enters to OFF condition indicated by on the display 2 The OPERATION MODE LOCK setting will remain in the remote controller memory eventhough the remote controller is ran out of battery 98 DISPLAY OPERATION MODE SETTING For operating indoor unit independently without outdoor unit connection remote controller has to be set according to below procedures before send the signal to the indoor unit New communication format between indoor and outdoor is required to communi
166. set for IS cooling Thermo judgment Compressor Hi Compressor stopped forcibly for 3 minutes Runs at Hi until first thermo off after operation is started Runs at Lo when thermo is off Set to Ultra Hi when the compressor runs at maximum speed and to Hi in other modes Operates at Med regardless Same as at left of the room temperature Operates at Lo regardless of Same as at left Set to Lo in modes other than the room temperature when the compressor stops Operates at Silent regardless Same as at left Set to Silent in modes other than of the room temperature when the compressor stops Performs only fan operation at See page 38 See page 40 the set speed regardless of the room temperature Operates at Hi regardless of the room temperature Start stop switch Operation lamp Same as at left page 40 e Same as at left See page 40 Enters operation after set as on the left Action during sleep operation silent sleep operation Stop Start Stop Off timer during stop Change in reserved time On timer during operation Set to Silent Lo Med Hi ultra Hi or stop depending on the room temperature time and heat exchange temperature Set to stop if the room temperature is 18 C in the Silent mode other than during preheating cooling is
167. t the customer place How to redisplay failure diagnosis gt 1 remote controller to OFF condition indicated by on the display Turn the circuit breaker OFF By pressing C MODE button on the remote controller set to Cooling operation indicated by COOL Turn the circuit breaker ON Set the room temperature setting on the remote controller to 32 C by pressing the TEMP w or button Set the fan speed with the b FAN SPEED button according to the desired failure information Refer b the corresponding table below Fan speed settings for failure data oom ep JE MED While directing the remote controller towards the receiver of the indoor unit press button START STOP button simultaneously The remote controller perform signal transmission with the device 8 The device beeps Pi to indicate thatit has justreceived the signal to redisplays the failure mode 9 Direct the remote controller towards the receiver of indoorunit within 2 meters in front of indoorunit and press the FO button Wait 2 seconds for signal transmission An error code will be displayed on the remote controller display How to clear the troubleshooting data Redisplay the troubleshooting status See the above procedure Turn the circuit breaker OFF ule By pressing i MODE button on the r
168. ted for 20 minutes after the start of the powerful operation 5 Pressing the START STOP button and POWERFUL button during powerful operation wil cancel the powerful operation Leave Home 6 If the sllep timer is set during powerful operation the powerful operation will be canceled 7 If the fan speed of the remote controller is set to AUTO or HIGH the compressor s maximum speed during powerful operation will be set to WMAX2 The lower limit speed is WKYMIN PW Leave Home set temperature PW 0 66 C 10 C Operation mode POWERFUL setting Temperature setting Compressor speed 8 If the fan speed of the remote controller is set to MED the compressor s maximum speed during powerful operation will be set WJKMAX PW The lower limit speed is WJKMIN PW 9 If the fan speed of the remote controller is set to LOW the compressor s maximum speed during powerful operation will be set to WBEMAX PW The lower limit speed is WBEMIN PW Thermo OFF 10 If the fan speed of the remote controller is set to SILENT the compressor s maximum speed during powerful operation will be set to WSZMAX PW The lower limit speed is WSZMIN PW Stop 11 The fan speed increases by FNUPPW W Start Stop swich i FUDILVH1 2 Closed Horizontal air deflrector Operation lamp FWLVHM P Leave Home Indoor fan Ultra Lo STARTMS LH STARTM 2 LH STARTMW LH Emm
169. the indoor unit microcomputer reset input is Lo for resetting and Hi for heating e Waveform of each part when switching ON the power and when shutting down is shown in the Fig 2 2 e After switching ON the power CD pin of IC521 supply voltage and D pin of microcomputer becomes Hi when DC5V line rises and reaches approximately 4 4 or higher Then resetting will be cancelled and microcomputer starts operating e After shutting down the power pin of IC521 supply voltage and D pin of microcomputer becomes Lo when DC5V line falls and reaches approximately 4 2V or lower Then the microcomputer will be in reset condition o0 3 Fan Motor Drive Circuit Microcomputer rotation output No of rotation detect The waveform of voltage at the point T1 2 Low No of rotation T2 High No of rotation The waveform of voltage at the point The waveform of voltage at the 2 e 61092 PWM pulse shown in Fig 3 2 the microcomputer pin is output to point The width of this pulse changes with instruction number of rotations e This pulse changes to analog voltage by 751 and C751 and it is applied to the fan motor as instruction voltage number of rotations The relationship between the voltage of point B and number of rotations becomes as shown in Fig 3 3 The gap may arise depending on the condition of unit e The feedback pulse of number of rotation is outputted from t
170. the lamp does not blink even if re indication operation is carried out e After carrying out re indication operation the remote controller operation will not be accepted once the data has been cleared To carry out normal operation switch OFF the power beforehand 84 CHECKING THE OUTDOOR UNIT ELECTRICAL PARTS MODEL RAC 18 25 35WSPA Gy 10 1e1nduuoo onI yun NO Joopino eoejdeu pue Ajddns Ajddns MO S 108 UL JO UJ 4010U1 Ue pue Joopino euuouqe JOOPINO 104 JOAOD Jo dO uo 10 Joopino 101 19431 Joopino 1010 JO UIE eoe deu 1010 JOOPINO SO UIE Joopino eoejdeu VG L E 94 ON 1 eoejdeu ELON JO 28e9J 10 JO do uo JOJOY uonoeuuoo YOOUD 9 9a SI 19 9H euuou
171. tional 30 seconds If temperature is high in the outdoor heating operation may stop to protect internal devices Heating operation stops while the temperature is preset at 30 66 AUTO FRESH DEFROSTING After the ON OFF button is pressed to stop heating the outdoor unit is still working with the OPERATION lamp lighting Fan speed does not change when fan speed selector is changed duning auto Auto Fresh Defrosting is carried out the system checks the outdoor heat exchanger and defrosts it as necessary before stopping operation At this point fan speed is automatic operation How is the automatic operation mode determined The room temperature cannot be controlled at automatic operation When on timer has been programmed operation starts before the preset time has been reached Does Nice temperature reservation function operate during dehumidifying Even if the same time is preset the operation start time varies When the heating operation is started the indoor fan does not start immediately and the damper at the bottom air outlet occasionally does not open 67 According to the room temperature and outside temperature heating or cooling operation is automatically selected Refer to the basic opera tion section It is automatically set as follows At cooling and heating Set at 22 The room temperature settin
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173. unit receives an infrared signal from the wireless remote control The receiver amplifies and shapes the signal and outputs it 82 6 Initial Setting Circuit 12401 e When power is supplied the microcomputer reads the data in IC401 and sets the preheating activation value and the rating and maximum speed of the compressor etc to their initial values e Data of self diagnosis mode is stored in IC401 data will not be erased even when power is turned off Microcomputer L External ROM DA IC401 E2PROM M Fig 6 1 7 Temporary Switch Circuit TEMPORARY SW Temporary switch MICROCOMPUTER Fig 7 1 97 e he temporary switch is used to operate the air conditioner temporarily when the wireless remote control is lost or faulty e The air conditioner operates in the previous mode at the previously set temperature However when the power switch is set to OFF it starts automatic operation 8 Room Temperature Thermistor Circuit A room temperature thermistor circuit is shown in Fig 8 1 According to room temperature the voltage of point becomes as it is shown in Fig 8 2 5V lt Room Temperature M Thermistor 8 Room 4 temperature input o gt Fig 8 1 Room temperature Fig 8 2 9 Heat Exchanger Thermistor Circuit Heat exchanger temperature is noticed inside the room 1 Preheating 2 Low temperature defrosts at coolin
174. up NC Cooling heating we switchover relay Reversing valve relay During forcible cooling the product is energized 2P lacking RL1 RL2 twice at increments of 1 second as illustrated in Fig 3 1 starting immediately after the forcible freezing switch is turned on When stopped the product holds the valve in the position where it was before stoppage 12V 12V IC 2 Microcomputer 19 9 H7 35 Reversing cooling heating switchover Cooling Lo Heating Hi Reversing valve Cooling heating relay coil relay coil Reversing valve ON Before conducting an energization check of the reversing valve detach the connector CN2 measure the resistance at both ends of the connector and ensure that it is within the range 400 Q 2 100 Q Check for energization only when the above test proves the product to be normal If it is abnormal it should be a lead wire break or a reversing valve failure Voltage when measured with a tester while the reversing valve is energized at the timing for voltage measurement Hold down the test switch of the outdoor electrical parts for at least 1 second Energization begins 1 second after the test switch is pressed Connect 4 of the CN2 to the positive terminal Connect pin CD of the to the positive terminal of the tester of the tester Connect CD of the to the negative terminal Connect of the CN
175. utes if indoor temperature is higher than 18 No time limit constrain if indoor temperature is lower than 18 and outdoor temperature is lower than 2 C During Hotkeep or Defrost mode indoor operation lamp will blink at interval of seconds ON and 0 5 second OFF When heating mode starts it will enter into Hotkeep mode if indoor heat exchanger temperature is lower than YNEOF 0 33 C When fan is set to Med Lo compressor rpm will be limited to WBEMAX In Silent fan mode if indoor temperature is lower than 18 C indoor fan will stop If indoor temperature is higher than 18 C 0 33 C fan will continue in Ultra Lo mode During Hotkeep or Defrost mode fan will continue in silent mode 10 During Hot Dashed or outdoor temperature is lower than 5 C compressor rpm is WMAX2 11 During Hot Dashed when room temperature reaches set temperature SFTDSW compressor rpm is actual x DWNRATEW 42 Reversing Valve Defrosting 15 or more Auto fresh defrosting Over defrosting inhibit period 30sec Fan speed Start Stop Switch Set to Hi Preheating judgment ing EMEN Hi ll ____ d 1 FIN Ho Utato Outdoor fan Operation lamp Reversing valve po poo ooo ooo cycle period Reverse cycle period Deceleration 12min 1 3min Max 3min 12min Max TDP
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177. ve to OV at pin 3 disconnected or connected reversely of CN3 Check the outdoor unit main P W B if it is Ok Yes Replace ICP1 Check whether deflector motor shorted and 2 Is ICP1 normal Less than also check ICP1 If IC111 Is 12V being output at No 10 is normal Above 10 No relative to OV at of blown open gt Q111 C114 and 20121 are defective ICP1 will be opened again C114 Yes Yes Replace the terminal board Make sure to insert the Is the thermal fuse on the connection cable until the Yes terminal board blown Q111 IC111 Replace IC112 Check whether 5 line is shorted if so ICP1 is opened again Perform final operation check Self Diagnosis Memory Function Defective modes stored in the non volatile memory of the indoor unit are re indicated by the remote controller operation This is useful to check the defective mode when switching OFF the power or restarting the unit operation without checking the number of blinking of the defective indication lamp The defective mode which occurred the last is memorized Defective modes of which occurrence frequency is too low to indicate on the indoor unit are also stored in the memory thus defective phenomenon which was not checked at the visit can be found by clearing the memory and rechecking the memory contents later on Re indication method for defective mode 1 Turn the circuit breaker
178. xchanger thermistor is Indoor thermistor MI NE opened circuit or short circuit 9 times e 010 Abnormal rotating numbers Overcurrent is detected at the 10 ti nes 00 of DC fan motor DC fan motor of the indoor unit 13 times 4 times 2 times Peak current cut Over current is detected 003 Compressor abnormal low Position detection signal is 3 times 01 speed rotation not input during operation 4 times 4 times Overload condition still persisting even when 4 times 5 times Overload lower limit cut rotation speed is below the lower rpm limit 6 times OH thermistor temperature rise OH thermistor is operating 4 times 7 times Abnormal outdoor thermistor Thermistor is opened or shorted OUTDOOR 4 times 009 When indoor unit is not connected Communication error 9 times 01 it blinks similarly not malfunction 0 10 times Abnormal power source Power supply voltage is incorrect m 11 times 4 times 12 times 4 times 13 times 4 times 14 times 4 times 15 times Abnormal PWB circuit Active circuit abnormal 16 times g 01 011 01 012 01 013 01 014 01 015 01 16 01 lt Cautions gt Refrigerant cycle fault too low in the heating mode or it is too high in the MAIN CHECK POINT 00 1 Reversing valve defective 2 Heat exchanger thermistor disconnected only in heating mode 1 Electrical parts in the outdoorunit 003 Communication error between Inter

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