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SERVICE MANUAL

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3. PCB SET Surface Mount og form N NP WB A Parts sde A osert on BOPPWB Solders de Rad al P 7 5 tch C H Hand osert on X NFPWSB Ch psurface mount ng 5 lo add 4 movot ng Briater tor igna ue an mm Prae mae e 2001 1 it cot walr 0405 wae 002 100 sk 8 it isos W coor atest
4. EXPANSION VALVE 7 Y 99 STRAINER jn 5S VALVE Ww J M S SILENCER EXPANSION VALVE STRAINER STRAINER M H A c 25 e 2 od HEATING OUTDOOR UNIT INDOOR UNIT GOND S TANK X COMP REVERSING VALVE al gt 1 bi 5S VALVE Uy ape SERS SILENCER n De d _ 0 gt PN 1 n 4 y Lo 28 VALVE J lt 52 NOILIGNOO S3 NOO38 AGOW 5 3015 ONIONIMS AGOW 10 4018
5. AN N DANGER 0 360 112 3 4 NORMAL STOP INDOOR THERMOSTAT OFF NOT MALFUNCTION 00 NOT TOUCH THE SCREWS OF THE MAIN OPERATION OFF L SYSTEM POWER MODULE WHEN THE RE WHEN STOPPED WITH POWER POWER CIRCUIT HIC 0 MINUTES BEFORE START THE UNT IS TURNED ON VOLTAGE 2101 zi HAS BEEN TURNED OM ON HIGH 1 TIME STOP SERVICING WORK STILL REMAIN EVEN AFTER THE UNIT TPN MAKE SURE THE DC VOLTAGE LEVEL 5 TURNED OFF A PEAK CURRENT AT MEASURING POSITION P1 AND DO NOT TOUCH ANY OTHER PARTS alg CUT SYSTEM POWER MODULE PWBs IS LESS THAN 10V EXCEPT THE SERVICE SWITCH Serene POSITION DETECTION SIGNAL SYSTEM POWER MODULE ABNORMAL LOW SPEED 15 NOT INPUT DURING OPERATION COMPRESSOR SELF DIAGNOSIS LIGHTING MODE BLINKING OFF 13 TMES ROTATION D wmm eis SWITCHING AL SWITCH FROM INTIAL o SYSTEM POWER MODULE SELF TIMES FAILURE POSTION QE TECTION SYNC 3131313 m CHECK PONT DINE C DMM HIIS 112 34 NAME 5 TIMES LOWER LIMIT CUT The LOWER RPM LMT Qf VOLTAGE E pat REDIREDIREDIGRI OH THERMISTOR 08 THERMSTOR IS OPERA
6. M NDOOR FAN MOTOR E 2 NOTES 1 DETAIL OF CAPACITOR TYPE AS BELON 2 DETAIL OF FORMING AS BELOV CN12 CAPACITOR H HAND INSERT n SW TRIN _ _ _ _ _ _ _ VH 6P TOOL SW TIS C CERAMIC CAPACITOR CHIP MOUNTING QOG OO ELECIROLITIC CAPACITOR R RADIAL INSERT E e ANTAL INSERT t 7j 2 RADIAL INSERT PITCH T 205 5 E f d d o e RESISTO 8 si 3 ToL w FORI 5 M si 0 W S M antag it 7 0 w FORI sm 0 ToL W FORI sm 0 TU w sm ToL W 9 liy 3 15APUSE 4 A Pus 6 0906 211 12V 0 20K 5 1 6 A 8521 1M5 1 10 C 661 5 10 C 830 1 59 11 C gt 3 LSAFUSE l 30 0 7 7 gt 02 22 5 5 H 522 5 R662 10 5 1 10 C 901 3 3K 5 4 C BLK FiF 2 T L 03 1959 14 A 532 10 5 1 10 C 663 5 1 1 C 902 680 59 1 8 C 1 Tue Z2 2 T 28 4 1 2 5 2 533 10 5 1 10 C 664 1 5 0 C 903 2 215 1 2 _ 5 215 2 a 2 z 3H 054 5 u C 534 5 665 1 5 C 9044 5 1 2 A ac 5 7 9 21 1 m
7. X 4 51 M oS NG ST n F 1 e __ 4S VALVE 5 SILENCER f v P cs 3 EXPANSION VALVE 1 2 N E lt r jn B 9 STRAINER inm _ f aa sree NH QY 25 VALVE S 2 J HEATING OUTDOOR UNIT INDOOR UNIT COND S TANK N COMP REVERSING T VALVE AS 4S VALVE e WU 59 FE 4 SILENCER te 31 ce x A EXPANSION VALVE 293 a 81 N T Jal 8 STRAINER es Hn m ji V iS TY 4 06 E 2S VALVE lo Gy J 2 REFRIGERATING CYCLE DIAGRAM MODEL RAD 70DH7A RAC 70DH7 COOLING DEHUMIDIFYING DEFROSTING INDOOR UNIT OUTDOOR UNIT COND S TANK X COMP d 5 REVERSING le gt
8. Tr M Diver me 0 Dire OVOET py 9 R110 XINICT 58 winter 118 881 222 28088 POWER RBLAY m 8EN 12 5 Van ov a 88N 0V 8 WHT Hr 2 geo 802 Y 0802 813 45 D Y 58822 0802 0812 02108 BEN 12V awaj 5 WHT ELECTRIC EXPANSION YALVE INDOOR1 RBD 80098 121 8 8 pns Chit BLO 14 2 088 BLK rae 088 OH THERMISTOR 110 1 2610250 100 110 4400821508 THERMISTOR R0 5 Or Q2 5 5400215 ur 850 OUTDOOR THERMISTOR 835 1 30 10 34008220 880 098 n 4 088 7 81 BEN CY 8 BER 12V 8 i wi 892 02018 11016 02010 1895 02028 02027 212020 1895 0034 11038 Reta T2030 f 12030 RTS 202004 If 17248 ifi 02000 Ns od Chet WHT TR 4P
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10. Inspire the Next SERVICE MANUAL TECHNICAL INFORMATION FOR SERVICE PERSONNEL ONLY RAD 50DH7A RAC 50DH7 RAD 60DH7A RAC 60DH7 RAD 70DH7A RAC 70DH7 REFER TO THE FOUNDATION MANUAL CONTENTS SPECIFICATIONS 4 HOW TO 6 CONSTRUCTION AND DIMENSIONAL DIAGRAM 23 MAIN PARTS COMPONENT 26 WIRING DIAGRAM 28 RAD 50DH7A CIRCUIT DIAGRAM sesiones entes 29 RAD 60DH7A BLOCK DIAGRAM eme rta 35 RAD 70DH7A BASIC MODE 39 REFRIGERATING CYCLE DIAGRAM 52 DESCRIPTION OF MAIN CIRCUIT OPERATION 54 SERVICE CAM GE 80 TROUBLE SHOOTING 83 PARTS LIST AND DIAGRAM 103 RAC 50DH7 RAC 60DH7 RAC 70DH7 SPECIFICATIONS TYPE DUCTING TYPE INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT INDOOR UNIT OUTDOOR UNIT MODEL RAD 50DH7A RAC 50DH7 RAD 60DH7A RAC 60DH7 RAD 70DH7A RAC 70DH7 POWER SOURCE 1 50 Hz 220 240V 1 0 50 Hz 220 240V 1 0 50 Hz 220 240V TOTAL INPUT W 1 400 200 2 100 1 870 200 2 500 2 530 200 2 920 COOLING TOTAL AMPERES A 6 40 5 90 8 55 7 90 11 60 10 70 CAPACITY kW 5 00 0 90 6 00 6 00 0 90 7 00 7 1
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12. PMRAS 70YHA 2P TERMINAL WITH FUSE 07 1 2P TERMINAL 104 MODEL RAD 60DH7A PART NO Q TY UNIT PARTS NAME PMRAD 50DH7 1 CYCLE ASSY PMRAD 50DH7 1 DRAIN PAN ASSY PMRAD 50DH7 FLOAT SWITCH PMRAD 50DH7 FAN MOTOR PMRAD 50DH7 FAN CASING PMRAD 50DH7 FAN PMRAD 50DH7 BAND L PMRAD 50DH7 BAND R PMRAD 50DH7 DRAIN PUMP PMRAD 50DH7 FILTER PMRAD 50DH7 FILTER PLATE PMRAD 50DH7 THERMISTOR SUPPORT PMRAD 60DH7A P W B MAIN PMRAD 50DH7 ROOM THERMISTOR PMRAD 50DH7 THERMISTOR PMRAD 18NH7A WIRE REMOTE CONTROL PMRAS 70YHA 2P TERMINAL WITH FUSE PMRAC 07CV1 2P TERMINAL 105 MODEL RAD 70DH7A PART NO Q TY UNIT PARTS NAME PMRAD 70DH7 1 CYCLE ASSY PMRAD 50DH7 1 DRAIN PAN ASSY PMRAD 50DH7 FLOAT SWITCH PMRAD 50DH7 FAN MOTOR PMRAD 50DH7 FAN CASING PMRAD 50DH7 FAN PMRAD 50DH7 BAND L PMRAD 50DH7 BAND R PMRAD 50DH7 DRAIN PUMP 0 0 PMRAD 50DH7 FILTER PMRAD 50DH7 FILTER PLATE PMRAD 50DH7 THERMISTOR SUPPORT PMRAD 70DH7A P W B MAIN k
13. am a eo O 74 106 4 5 14 C 535 10 5 10 9052 2 5 14 C 5 R902 Tz 3 073 5 1 0 536 5 C 1 5 C 906 10 5 1 2 4 e o T 5 08M 55 C 537 10 5 1 10 C 712 10 5 1 10 C 907220K595 2 i 09 15 59 1 1 C 538 C 7223 3 5 1 10 C 908 2 5 1 2 C 1 EX ea la 10 15 5 1 0 C 539 i 741 1101596 1 10 C 909 A CN10 d 7 2 4 4 11 1585 1 C 540 1001596 l 1 C R749 11059 1 10 9101 2K 5 C TEMPERATURE FUSE m 3 1 i 541 10K 59 l 1 743 110 5 i I C 911 1 5 1 10 C 102 TIN 30112 791 1 C 5424 10K5 1 16 C 744 130 5 C 912 33 5 1 1 C 9 NTERFACE TRANS 7301 C821 R821 5 2 5 H B E 30412 7H1 C 601 1859 10 C 748 1301 5 1 10 C 91313 3 1 1 10 C 1 3 D821 R827 i Tepig 27 303 106 5 1 10 C 602 10 5 1 10 746 1305 1 0 C 8914 12K 19 1 10 TERMINAL 305 su 607 10K 5 C 915 680 5 1 1 c BOARD 2 Q FLOAT SWITCH 306 5 1 1 608 10 5 1 1 803 120 5 916 oto m og 301 15 C eod c 5 i u c 917 515 1 F RELLAY PA 8 7 401 390155 10 C 612 10859 110 C 805 120 5 1 0 9 51 5 1 P BN gt 402 390 5 1 10 C 613 10 5 1 1 8061 20K 5 1 0 C c
14. ultra Hi or stop depending on the room temperature and o room temperature compressor runs at maximum compressor stops time Set to stop if the room temperature is 18 C in the ultra Lo mode other than during speed and to other modes 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 D S Med Operates at Med regardless of Same as at left Set to Med in modes other than when the Set to ultra Lo Lo Med or stop depending on the room temperature and time Set to the room temperature compressor stops stop if the room temperature is 18 C in the ultra Lo mode other than during preheating cooling is recovered at 18 33 C Lo Operates at Lo regardless of the Same as at left Set to Lo in modes other than when the room temperature compressor stops Set to ultra Lo Lo or stop depending on the room temperature and time Set to stop if the room temperature is 18 C in the ultra Lo mode other than during preheating cooling is recovered at 18 33 C The fan speed is controlled by the heat exchanger temperature the overload control is executed as in the following diagram Heat exchanger temperature KAFON KAFOF Med with overload Lo Basic operation of temperature controller Sleep operation with sle
15. 9 5 Jojsiuueui HO ewou 10151019 1 S euin 9 0601 10151 19 1 sued eoejdeu 96 1 519 29 09 yeu ejns exei eui SI jun y sued Aue sued Aue sued Aue Jamod 5 eui eoejday 91eoipui JOU 514 si samod snf 54015 pue sj8saJ y 87 9591 BU S 9015 5414 10601 AS si 0 AjpeuuoN ewou jeubis ndu di y S e ewou amod Jo e ewou eui S SoA 545 y 5 10287 97 POWER CIRCUIT Phenomenon 1 lt Rotation speed does not increase gt Recheck cord etc of the system power module If they are disconnected conne
16. Operation lamp LLLELELELELELLELELL HELL ERR aw Reversing valve heating on mode ee LLL LL Reverse cycle period Reverse cycle period 12min Max Max 3min 12min Max Deceleration period TDP TDP TDP o o o 5 e e o 411 412 413 1 min 1min gt WMAX WMAX2 Urs 3000 09 0 The sleep operation starts when the sleep key is pressed When the sleep key is set the maximum compressor speed is limited to WSTD 2000 2 and the indoor fan is set Notes to sleep Lo 1 The defrosting inhibit period is set as shown in the diagram below When defrosting has finished once the If the operation mode is changed during sleep operation the changed operation mode is set and sleep control inhibit period is newly set based on the outdoor temperature when the compressor was started During this fan speed does not change even when the fan speed mode is changed Lo period the defrost signal is not accepted When defrosting is to be set during sleep operation defrosting is engaged and sleep operation is restored after 2 If the difference between the room and outdoor temperature is large when defrosting is finished the defrosting maximum compressor speed WMAX or WMAX2 can be continued for 120 minutes maximum When operation is stopped durin
17. CN14 NH 67578 2 WHT WHT ae DEFROST BLUA CNG MATN SEE THERMISTOR Bue BLU E 1 CN5 RED THERMISTOR m MD SYSTEM POWER MODULE KONEN FWA MEENE 2k 5200 Dy P NB ELECTRIC EXPANSION 10302 VALVE FOR INDOOR UNIT 10303 10304 USE 30A FUSE AHRAB1284A 86 CHECKING THE INDOOR OUTDOOR UNIT ELECTRICAL PARTS AND REFRIGERATING CYCLE Unit does not operate Yes Open electrical cover of indoor unit Timer lamp Does the timer lamp on the indoor unit blink gt See Troubleshooting when the timer lamp blinks Refer page 85 No Remove the terminal cover and check the voltage between terminal C and terminal D Set to room temperature 16 C in the cooling mode or to 32 C in the heating mode and press the start stop button t m Insert and fix the SZ connecting cords 9 Pr B 14 Does the operation lamp the indoor unit with screw a start to light or blink d places Sms BN e elo 0 1 SS
18. atest F 6003 10k 5K 1 18 A 00 045 30 8 1600 00 7 in s ace FIT ple um 0004 atest E 5 c 7 005 11 8 sk a eus weal 7 ea 009 1 s 33 qum eur 2010 inu sk 4 ace ut sk fives ITE i X 8370 ok 4 ios cobs tor geal 7 On 4 Im 8371 sk TIT 400 Qus LL t0 vea en w quero 8 c t0 ow ve R40 sk wos eus acest ajl eur 8205 138 4 sak 53 A 081 wea F eun o N P W 8 C por s Er CEN 1 Bids it five 007 t 7 un collie NP COLLIS 510 s a R501 it sk iis isos ast 8 an Hr 8110 qve d it cott or acest Tk sx R503 In sk oo
19. 174 ins has IIT eun 100 15 D703 peodurt aie m 15 2 wi 0705 8 product mm 7 100 1 18 Mu 1 8 TII i un nope us une T eu 5t c A eres N D708 1 let t e a 270 1 7 ruled 8 mm o fe Lc i i Ln end 4 eres ca w 2713 4 1 01034 0 10302 tren c en Qui 1 158 t 1 8 92 TH sk n0 en 1000p 5t A qus ie c a kermi s IIT 1 5 7 CAET 8 7 18k 5K A r x a ios un eni s o 8 Liv 7 m IN eni gt 8 7 8301 iets T 0704 1 51 F 9
20. INDOOR FAN s PART NO FORI 402KDS4148U C H LINK ov 7 5 18 53 IRR GPIUM28IRK 03 5 181 CN16 XA 2P 10 BLUE H_ FLOAT SHITOC LE o _ 0600 664 0601 CN1101 PA 6 P WHITE JH LINK SYM PART COLOR FORM 282 2541480 i y Q 605 Ke i CN1102 PA 4P 0 WIRED REMOCON WEEKLY TIMER LD1 SEL2713K 90 1ALO17 PC1102 LD2 sEL2413E GREEN Mop D3 0 1 7 48 rp D903ALO1Z A 5 LD3 RECEIVER L z d RELAY SWITCH PHOTO COUPLER y secre 29 04 ALO1Z A M sut PART NO FORM SYM PART NO 0 PART NO FORM T SEL27 13K YELLOW D908RL2Z H t 3 EER 102 C 2908 ALO17 A Ov PC103 TLP42 TP1 C C XH 4P FTR F3 RY EVQ11A09A PC104 21 C D308EGO01C A r Gy M STEPPING MOTOR 5555915000 1101 TLP421BL H Id RINI Blew 1102 TLP4218L H BOTID3SBAGQ H M2 IG si PART NO FORI 5555919800 1 2 e SURGE ABSORBER C2 CN8 cil Hse MIR 1 700351 31 m mm e _ _ _ _ _ _ _ _ _ RS ORI 2 51 31 YA01 416NR 12D P 2 E 5 s 2 VA02 416NR 12D P VA03 416NR 12D P SA01 RA 102M C6 CIRCUIT DIAGRAM MODEL RAC 50DH7 RAC 60DH7 RAC 70DH7
21. ITE 8 xa SSS rm 1 rn 7 R340 100 1 18 A 470p 3 tl 100 sx c wo w TIE isnt Prud uaa in M Relay 106 A 8476 n m nt s nt vulc a 115 a VARISTOR un e 100 plc i ue x vagisTo RH 151 120 rmm ITE c w ETT 41 VARISTOR 4518 20 8551 TO Ee 8 THO HT 7 350 wor w TIT product 7 we i i ne os v 5 i nu v TTE mmn ow 6 a uw ETET 7 R355 43t A 8347 nt sk 3 1808 N mm R356 10k 1 14 A Rass it 5 1608 N R357 tk sk ne 1 is na 1 7
22. m n n Ur my i I 5 m LE dE d MEL 12H Rass 510 5 1 18 A ut 7 1000p 165 Wear T63 5 4 N iw __ t A Byes t TIT it rm PF 5 1 ivi 0203 VH R 8 erp Twit 1 thee 8 wa gt 857 101 S uos V en u 5t D 167 IWI Cnt 85 17 a wem um quw OB a 1 un mm TIT it 739 109 5 1 i i 8177 ITE ITI ent len 5 1 m am fife TIT 1012 TID 7 TIT in w 101 Wi n R330 141 TIT 1014 i i ul TR 7 iat wos TTE 1 t s wos w TIT REGI 8 mm T mm 7 10k sk a w 10k ue x REG 8 TII 10k A it 5K 1 1608 REGE 1118245 v6 elu BEG 8 4 9 i TIT 8571 1Wis 8 1 1 E
23. 8 Qu TIT nt x hz nn w rmm 10t life a no tio N a R525 10t s a isos 1 i nt a uw jt sk isos w 1000p t TIT atest wee 7 8EN 20Y BEN OV TIT 510 5K A 0105 100 1 Case 001 wee Rees 100 5K A 5K 1 18 A 1605 0104 a R224 100 sx c we TIT sat sk um t 1 eun E 5 a isos 7 wu Rees 100 sx c isos um eui 1 5 100 sx a 3 a a ists TIT nt le wos v R535 s ITI snap 7 isos NINE 10t sx wo w TIT sk eus 41 2 a we tu nt 5 A 41 25 A nuts 1 abol suat rut uiti cud praet TIT 10k sx 4 wo sx a W C20
24. Sale oe The circuit detects the indoor heat exchanger temperature and controls the following 1 Low temperature defrosting during cooling and dehumidifying operation Voltage at The voltage at depends on the heat exchanger temperature as shown in Fig 5 2 10 0 10 20 30 40 exchanger temperature C Fig 5 2 6 Temporary Switch INDICATION P w B OPtion Micro computer C1 R601 C2 o ANN 48 HA input 1 3 33 HA output M2 4 R701 CN9 Temporary Switch 1 R602 C601 Fig 6 1 e The 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 57 7 Drain pump trial run switch R533 Drain pump Microcomputer P trial run SW normally Hi e This switch forcibly turns the drain pump on When the drain pump trial run switch is turned on the timer indicator will blink seven times and no remote signal will be accepted 8 Float switch 5V 4 2 FLOAT SW 0 5 63 t ii gt Microcomputer R539 R621 moO CN16 OV OV O
25. Reset Circuit 12V 4 AN 1 5 T z 8 8 0205 Microcomputer l AX 6V01 gt STA 49 C224 Reset OV Fig 9 1 Reset circuit performs initial setting of the microcomputer program when power is turned on Microcomputer resets program with reset voltage set to Lo to enable operation at Hi level Fig 9 1 shows the reset circuit and Fig 9 2 shows waveform at each point when power is turned on off After power is turned on 12V line and 5V line voltages rise When 12V line voltage reaches 7 2V Zener voltage of ZD201 ZD201 turns ON and Q211 and Q205 turn on and reset voltage becomes Hi Reset voltage is not set to Hi until VDD of microcomputer rises to 5V enabling operation due to ZD201 After power turns off when 12V line voltage drops ZD201 also turns OFF 12V line 6 5V line Reset voltage Voltage when power is turned ON Time 12V line 5V line Reset voltage Time Voltage when power is turned OFF Fig 9 2 10 Temperature Detection Circuit e The outdoor units this model provides with the outdoor temperature thermistor DEF defrost thermistor OH overheat thermistor and electric expansion valve thermistor so that they detect the temperatures of the unit and control the system e The circuit of the thermistors is shown as Fig 10 1 for model RAS 70YHA1 RAS 80YHA1 and their roles and tempera
26. 19 9991 r peJlM ZHQ0Z7 OVH V HQ0Z QVH ZHG09 0Vu V4HQ09 QVH ZHO0S OVY VZHO0S dVe 512018 35 Table 1 Mode data file RAD 50DH7A RAD 60DH7A RAD 70DH7A LABEL NAME VALUE WMAX 5800 WMAX2 5800 min WSTD 4950 min 5200 CSTD 5000 min WMIN 1500 1600 STARTMC 60 Seconds DWNRATEW 100 DWNRATEC 100 SHIFTW 2 00 C SHIFTC 1 00 C CLMXTP 30 00 C YNEOF 20 00 C TEION 0 00 C TEIOF 9 00 C SFTDSW 2 00 C DFTIM1 60 Minutes DFTIM2 60 Minutes 87 BASIC MODE Operation mode Fan Cooling Dehumidifying dehumidifying operation by the function select button only not including that engaged by the dehumidify button Heating Auto Basic operation of start stop switch Start Stop Start Stop tart stop switch Operation tamp LC Off timer Start stop switch Operation tam ancel switc Operation tem Timer tamp Timer memory _ Off timer during stop Change in reserved time On timer Timer functions Srart stop switch Reserve switch Cancel switch Change reserved time during operation Off gt On On gt Off time
27. 7 N Sleep Timer The device will continue working for the designated number of hours and then turn off Press the SLEEP button indoor unit will produce a beep The timer information will be displayed on the remote controller Example Setting 3 hours sleep time How to Cancel Reservation Press the CANCEL button The RESERVED sign goes out with a beep 16 Explanation of the sleep timer The device will control the FAN SPEED and room temperature automatically so as to be quiet and good for people s health NOTE e f you set the sleep timer after the off or on timer has been set the sleep timer becomes effective instead of the off or on timer set earlier e You can not set other timer during sleep timer operation e After sleep timer time is up and when press sleep button again the sleep timer will be set as last setting e Sleep timer effective only once px CIRCUIT BREAKER When you do not use the room air conditioner set the circuit breaker to OFF HOW TO USE THE AIR CONDITIONER EFFECTIVELY An average room temperature setting is probably the best for you as well as being economical Excessive cooling or heating is not recommended for health reasons High electricity bills may also result Close the curtains or blinds to prevent heat from flowing into or escapi
28. 3 The indoor fan speed does not change even when the fan speed mode is changed 4 When operation is stopped during sleep operation the set temperature when stopped as well as the time continue to be counted the set lime is changed during sleep operation all data including set temperature time etc is cleared and restarted If sleep operation is canceled by the cancel key or sleep key all data is cleared Cooling Defrost Indoor heat exchange temperature TEION Cooling defrost signal Hi Indoor Med Lo Outdoor fan Ym 222 Reversing valve 10 mins heating on mode See basic operation See basic operation Balance period Compressor speed 43 Dehumidifying Cooling preset temperaure Start Stop Switch 30sec Room temperature judgement Room temperature Room temperature judgement Operation lamp Thermostat judgement Indoor fan Outdoor fan Hi Med Lo Hi Med Lo Reversing valve Notes rotation speed Compressor 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 2 C The indoor fan is operated in the Lo mode During thermo OF
29. 6500 o R366 e z 1 __ _ 224 49 Reset 2 R345 5 SPM terminal r DC current ov OV Detection resistor R24 R245 5V 4 x C282 IP cutter SPM terminal ls R248 UJ d C281 L Y D205 ov D104 R110 R338 w7 1 Is R108 Regg C283 T C105 R221 ov oV oV Fig 7 1 Peripheral circuit of microcomputer AX 6V Table 7 1 Circuit block Basic operation This circuit detects DC current flowing power module When over current instantaneous value flows it stops upper and lower arm drive circuit and also produces lp signal to stop microcomputer Peak current cutoff circuit Overload external This circuit detects DC current flowing to power module and produces signal to judgment circuit notify microcomputer of overload status This circuit voltage amplifies DC current level detected by detection resistor and sends it to microcomputer In addition setting of internal external overload judgment is performed Voltage amplifier circuit Reset circuit This circuit produces reset voltage 72 8 Overload control circuit OVL control circuit e Overload control is to decrease the speed of the compressor and reduce the load when the load on the air conditioner increases to an overload state in order to protect the compressor electronic components and power bre
30. 99 SYSTEM POWER MODULE DIAGNOSIS Circuit diagram of O Collector the device excepting the reflux diode BASE Q O Emitter 9 Circuit diagram of the module Pauo Pavo apawo U Ww Neuo nevo NGWO e Terminals symbol mark of the module X See next page for measuring value using tester 100 HOW CHECK SYSTEM POWER MODULE Checking system power module using tester Set tester to resistance range X 100 If indicator does not swing in the following conductivity check the system power module is normal In case of digital tester since built in battery is set in reverse direction and terminals are reversed N CAUTION If inner circuit of system power module is disconnected open the indicator of tester will not swing and this may assumed as normal In this case if indicator swings when and terminals are connected in reverse of diagram below it is normal Furthermore compare how indicator swings at U V and W phases If indicator swings the same way at each point it is normal wo 7 2 11 whe 101 HOW OPERATE USING THE SERVICE SWITCH THE OUTDOOR
31. NOILVH3dO NOILLVH3dO LXAN LV 2 D 8010 5 ONIZITVILINI ONIONIMS 3015 340 HOLIMS NIV ONIMS 3015 YOLVINOYIO 2 AZMVILINI ONIMS 3015 1002 NO HOLIMS NIVIN dOLS AYVHOdWAL SI SNIMS SI SGOW ONIMS 5 3015 ONIONIMS 5 LYVLS 4018 Ho1vinoulo LAVH OLNV Add OLNV 440 1VNH3LNI OWYSHL NO OWH3H L LNAWOW 3H L LV 4015 ONIONIMS D ONIONIMS LYVLS 1 OLNV LNSAWOW 4018 ONIDNIMS amp 2 D ONIDNIMS 1515 OLNV NVA 1009 1009 OLNV LNAWOW LV 4015 ONIMS LXAN LV 2 D 40193714
32. 0 a Communications from indoor micro computer to outdoor micro computer Communications from outdoor micro computer to indoor micro computer Fig 2 1 Indoor Outdoor interface Circuit 64 Base of outdoor P W B 0801 0802 0803 9 Pin Outdoor micro computer Pin Pin Indoor micro computer SDO Pin SDI Pin 35V DC line 0 7V OV 5V OV 5V OV 5V OV Mitt 5 0 gt 100ms 33ms Leader 1 frame Fig 2 2 Voltages Waveforms of indoor Outdoor Micro computers Outdoor to Indoor Communications Base of outdoor P W B Q801 Q802 Pin Outdoor micro computer Pin 7 Pin Indoor micro computer SDO Pin SDI Pin 35V DC line OV a OV ch xor apu OV 5 7 5ms 33ms Transmit receive 1 frame switching time Fig 2 3 Voltages Waveforms of indoor Outdoor Micro computers Indoor to Outdoor Communications 65 ircui 3 Power Module C M NO S A NO S 1 8 109 seule 9SION N 1 T 1 juauno ysniu 8008 O O 1 21009 1 55914 05 od O O 3snd 19 109 545 JAMO BU APIS UO sJojsisueJ
33. isos 2718 52 sk 4 5 wos or 2104 1 nt x 1 isos W Im 1 fc 7 D105 1 18020820 c n 8 7 Reed 100 1 1 A 01 25 F 120 4 N 102020 c n 1 RI tk 5 1 18 A isoa R721 161 4 41 25 1202 4 7 n T TIE TTT 7 TIT IT os A 1 5 120 oTa IT 1 inn D D p amt s ya D205 1 1 i ET p TIT 871 im 1 D208 1 t 0 iit pua bod D eur 2107 1 t T em 188355 W i gt wer 100 sk isos D2103 8 75 tk 5 1 18 1 1404 eut 2812 155355 4 254112180 D m sun 1 Rin aut SES n 277 TII 1 350 00 D3504 155155 c 1 fait i TII TIT sur 7 100 ec
34. quiet or stop operation the following phenomena may occassionally occur but they are not abnormal for the operation 1 Slight flowing noise of refrigerant in the refrigerating cycle 2 Slight rubbing noise from the fan casing which is cooled and then gradually warmed as operation stops The odor will possibly be emitted from the room air conditioner because the various odor emitted by smoke foodstuffs cosmetics and so on sticks to it So the air filter and the evaporator regularly must be cleaned to reduce the odor J Please contact your sales agent immediately if the air conditioner still fails to operate normally after the above inspections Inform your agent of the model of your unit production number date of installation Please also inform him regarding the fault Power supply shall be connected at the rated voltage otherwise the unit will be broken or could not reach the specified capacity 22 _ CONSTRUCTION AND DIMENSIONAL DIAGRAM MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A 980 for Suspension Bolt 40 lt 900 4 40 12 for Suspension Bolt 20 Unit mm 30 T 22 18 Wired remote controller 720 676 for Suspension Bolt Refrigerant Gas Pipe Connection 8 T 1 Refrigerant Liquid Pipe Connection N N Drain Pipe Connection 77
35. 23 Q 5 209 0 50 C C9011470p 50 C C 5 R L5 T SIT 8 C302 0 1 25 BEICH 0000 y y ki 5 BIEIE Y mm C902 2202004 Q600 15045 L74 7 i 95 m coos 1450 2 9601 15048 z 304 0 1 25 C C904 15000 50 wer 0 WT 40 0 11 25 c c 905 68 50 QTAZKRCAOZE cm 5 5 5V ATL 16 DY R C906 22005 405 4 2 mm 5 12V 0802 L90 210M CONNECT Q80328C3441E L903 n CN1102 SM PART No COLOR REMARK Q821KTC407T5E m pm PH 2P 0 BLACI 00 THERMISTOR PH 2P 10 BLU HEX THERMISTOR CN3_ VH 3P M BLUE DRAIN 13 CHIP JUIPER 12 CN3 ZR 8P 10 BEIG TEST zr Tm ur Iw 2 O WEEKLY TIMER 5 P STEPPING FI R1110 CN9 XH 4P 10 BLACK JH ODE ax CN10 PH 2P FUSE sw PART NO sil PART NO POR Q AE CNII1 EI 10P RECEIVER INDICATION PIB BZ 1 H 10 3 C PA 6P v ss CNILAJPH 8P 10 0 H pup RECEIVING UNIT 401 05184 C Tir rx 5 5 CN12 6
36. Low speed 700min High speed 1200 1 1 7mS 17mS 7 1mS 4 2mS 1300min 15 B 24V 5 4V Fig 10 2 e Fan motor will receive signal thru Joint Connector with VDC Motor Drive Voltage VCC Motor Controller Power Supply VSC RPM Instruction motor WCC return the FG sinal under frequency RPM e The circuit produces fan motor drive from 340V DC supplied from the indoor unit and controls the fan motor speed A CAUTION 1 A CAUTION 2 Indoor fan motor circuit will be connected with primary Please do not disconnect the fan motor connector during power source line and please take care of the running due to the high voltage supply it will cause the electrical shock damage at fan motor and PWB 59 11 Wired remote control receiver circuit Wired remote control 5V A 5 e M LO 4 1550 551 C550 R771 R770 R611 Wired input 1 1 13 22 C611 Micro computer yee ov 3 PC101 C770 C771 4 GRN2 OV The signal from wired remote control is send to micro computer pin no 13 by using photo coupler PC101 L550 L551 C770 and C771 act as a filter to reduce the noise from the wired remote control 12 Static pressure switch Fuse Operate LED Timer LED 2 Temporary sw2
37. Mun c n Rear 143k A eus ein ee 1 tyabol prodaet ator nem enm tk sx A N 870 19 12 1 Ree 4 ET c i i TINT 5 5 wr x w R702 sk ece Cru m uni 7 7 250 10t h 70 100t S wos gt enl W Hm WF Cols 7 7 10t s N 8704 10 1 4 1 Cree C495 0109 1 NF 6253 3st A 8710 141 4 25 A uos F n 7 6154 100 5 A iets 75 5K 4 C224 10 16 D 4 wx Vni 4 WF Cols bess zk A ute N 8712 3 4 4 eus Dott Wi simi 1 i TTE n TIT nt isos W 71 wos uwa mm TIT vele a isos W ik 5 1 18 4 1808 R715 5 1 4 4 22 st D 4 wx 2101 4 1 n wi 5 TIT te 87 1 40 isos 2102 1 c 1 i IIT 1t x c 2717 IUNPIR 1 eur Imi 63 a 1 TIT 101
38. 1 Reducing union Large dia service valve 2 8 6 35mm Charge refrigerant of 300g after vacuuming 7X 1 diameter service valve using the Reversing 1 2 12 7mm i educing union reducing union ang Pipe j 2 8 and 3 8 2 Copper pipe 2 8 and 1 2 as shown on the right 1 1 Me Do not operate for more than 5 minutes 1 1 1 Small diameter service valve The operation method is the same as How to operate using the connector to servicing the outdoor unit X 1 The charging amount of 300g is equivalent to the load in normal operation 102 MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A PARTS LIST AND DIAGRAM INDOOR UNIT 103 MODEL RAD 50DH7A PART NO Q TY UNIT PARTS NAME PMRAD 50DH7 1 CYCLE ASSY PMRAD 50DH7 1 DRAIN ASSY PMRAD 50DH7 FLOAT SWITCH PMRAD 50DH7 FAN MOTOR PMRAD 50DH7 FAN CASING PMRAD 50DH7 FAN PMRAD 50DH7 BAND L PMRAD 50DH7 BAND R PMRAD 50DH7 DRAIN PUMP Ow I PMRAD 50DH7 FILTER PMRAD 50DH7 FILTER PLATE N PMRAD 50DH7 THERMISTOR SUPPORT PMRAD 50DH7 P W B MAIN PMRAD 50DH7 ROOM THERMISTOR N PMRAD 50DH7 THERMISTOR PMRAD 18NH7 WIRE REMOTE CONTROL
39. Gas pipe eee 321 gt 90 95 m Liquid pipe 402 lt 1 Servicing space of 100mm or more is required on the left and right sides of the indoor unit also 50mm more space is required above the unit Insulated pipes should be used for both the narrow and wide dia pipes Piping length is within 20m Height different of the piping between the indoor unit and the outdoor unit should be within 10m Power supply cord length is about 2m Connecting cable 2 5mm dia x 3 AB Line 1 6mm dia x 2 CD Line is used for the connection Indoor Unit Outdoor Unit Power cord iN LHE B Connecting 7 a B D C 23 MOUNTING HOLE DIMENSION MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A SIDE VIEW Refrigerant Gas Pipe Connection Refrigerant Liquid Pipe Connection lt lt lt FLOW S lt DIRECTION AIR FLOW E 2 Ta 7 DIRECTION lt amp 07 Drain Pipe Connection TOP VIEW 980 for Suspension Bot 6 07 900 30 720 5 ou for Suspension Bolt 30 24 MODEL RAC 50DH7 RAC 60DH7 RAC
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41. This does not indicate a fault 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 for the space Preliminary operation is performed for one minute when the power switch on and heating or dehumidifying is set The operation lamp blinks during this time for heating This does not indicate a fault TROUBLE SHOOTING DANGER 1 Remember that the OV line is biased to 155 170V in reference to the ground level Also note that it takes about 10 minutes until the voltage fall after the power switch is turned off DANGER When using an oscilloscope never ground it Don t forget that high voltages as noted above may apply to the oscilloscope T Jill N PRECAUTIONS FOR CHECKING Power source 19220V 230V 50Hz Indoor unit electric parts 31 C Control gt Outdoor unit I System power module 2 ACT Module Power module MAIN P W B Across 6 line Across a ground Across ground Always keep your hands and metallic things away from the enclosure of the oscilloscope Oscilloscope i 83 Compressor motor approx 26
42. W R G BLU BLUE RED RED BRN BROWN WHT WHITE 4024 is REACTOR 1 H ah RPEN YEL YELLOW __ 80 BLK FUSE COIL RELAY GRY BLU GBN1 guis Be MBS SYSTEM SERVICE COLLECT REFRIGERANT FROM INDOOR GPN amp WHT ig STACK POER MODULE OPERATION UNIT AND STORE AT OUTDOOR UNIT Mi ue tT YEL T 2 v 1 SWITCH OFF THE MAIN POWER SUPPLY AND THEN SWITCH IT ON AGAN pg NF ae w BFD WAIT FOR 1 MNUTE 2 PRESS AND HOLD THE SERVICE SWITCH FOR 1 SECOND TO START OUTDOOR ie BLK UNIT IN COOLING OPERATION IN ORDER PREVENT PARTS FROM DAMAGE B STACK F sse DO NOT OPERATE THE OUTDOOR UNIT FOR MORE THAN 5 MINUTES 2 GRY GRY 8 DI 3 PRESS AND HOLD THE SERVICE SWITCH FOR 1 SECOND TO STOP THE BAN C 8 SERVICE OPERATION D BRN ak capa BLU 4 REPEAT STEP 1 TO SERVICE OPERATION NEED TO BE REPEATED RED vea da S 5 MEASURING POSITION OF DC VOLTAGE sve L ean 8 CIRCUIT D W B s La 1006 MEASURING POSITION OF VOLTAGE i anu FAN p SERVICE SWITCH POWER P 7 ug WHT M a COMPRESSOR m EU B CN27
43. Yes A ae m 2 35V 9 Is the compressor the outdoor unit operating D OV Yes No oleo earth wire 8 NZ green and gt a Remove the outdoor unit cover and yellow wire 1 g e electrical parts cover and check After unscrew the band self diagnosis lamp LD301 Connecting put the connecting cords SMOOTHING Cords and fix again with screw CAPACITORS MAIN P W B 2 places SERVICE SWITCH cep Is approx DC 33 to 37V being generated Is the Yes SYSTEM POWER P W B Loud Check to see whether the F ur cable is connected incorrectly or disconnected Does LD301 blink one time Normal Repeats 0 25 second on and 2 second off Blinking other than One time blinking one time J Press the service switch for 1 sec 5 Does compressor operate Yes After checking be sure to press the service switch to stop the operation See Out door unit self diagnosis lamp No lighting mode NU 7 NDA Check the refrigerating cycle Check the outdoor electrical parts Check the indoor electrical parts 87 CHECKING INDOOR UNIT ELECT
44. atest gee 7 Cars i 2 AA d 2 10 1 8504 1t s i 4 tor 45 7 Cate 2 Hs 505 it sk 4 Cons tor atest c BeR 7 TIE 3 A22 nt sx A 1t sk u Seen EA E Tm 201 nt sx w 507 a see W 050 enl VH 4P 93 8 E 8 R203 ak sx ios R508 dug P ai 2 sx ww w sa a jue ux cose mal r x Reds at ok A N 8510 sk 6 0053 007 7 L rT P iia inci sk a ut oon sit a 9 us mi 8207 nt s p sk ques u ELI it 0 ent me Em gt teeta 0 car an els 515 R25 ow R52 life a wens 9 IIT nt 10k sk wos Casa 100 5 2020 10k ok wos W TIE 10t ok im 4 W tose
45. pue y epis UO lt 016 5 94 HUN euo peuiquioo pue pue amod 5 eui swous g 66 320 360V is input to power module and power module switches power supply current according to rotation position of magnet rotor The switching order is as shown in Fig 3 2 At point Ut is ON is ON circuit in Fig 3 1 At point Ut is chopped OFF is ON circuit in Fig 3 4 N Upper arm transistor Fig 3 2 Switching order of power module e Upper arm transistor is controlled to ON OFF by 3 2kHz chopper signal Rotation speed of the compress is proportional to duty ratio ON time ON time OFF time of this chopper signal e Time T in Fig 3 2 shows the switching period and relation with rotation speed N of the compressor is shown by formula below N 60 2 X 1 T e Fig 3 3 shows voltage current waveform at each point shown in Figs 3 1 and 3 4 First half of upper arm is chopper second half is ON and first half of lower arm is chopper second half is ON 07 transistor chopped U transistor ON Voltage point 320 360V Chopping period Chopping period ON Upper arm transistor Current 8 Fig 3 3 Voltage
46. 0 11 5 gt gt 9 5 210 111 212 The value change quicker if you keep pressing the button Press the 1 Reserve button ON TIMER reserved with a signal received sound beep The 1 ON Mark starts lighting instead of blinking CANCELLATION of Timer Reservation Press the 0 Cancel button As the time settings are stored in remote controller memory you only have to press the 1 Reserve button in order to use the same setting next time 15 E A GD HITACHI Operation will Operation stop at setting time start for setting temperature at setting time The starting time may different depend on the room temperature and set temperature 3 O A HITACHI a aly 6 0 HOW TO SET THE SLEEP TIMER Indication Sleep timer 1 hour 2 hours 3 hours 7 hours Sleep timer off
47. 401 faulty 9 LL 2580 13 times There was error in the data read from 1401 a i Lights for 0 35 sec at interval of 0 35 lt Cautions gt 1 Ifthe interface circuit is faulty when power is supplied the self diagnosis display will not be displayed 2 f the indoor unit does not operate at all check to see if the connecting cable is connected or disconnected 3 check operation again when the timer lamp is blinking you can use the remote control for operation except for mode mark X1 85 SELF DIAGNOSIS LIGHTING MODE MODEL RAC 50DH7 RAC 60DH7 RAC 70DH7
48. 5 af tS HEX THERMI f gt s R 250 n z 2 825 50 3950 2 gy 7 f c emi il C 502 0 1250 C908 33025 D T LEO ain nor mm O AM _ LOJ SELECTION lo static C 1000150 C 904 330 50 D 104 4 1 R 4 R305 3 3 2 1101 505 0 1 25 7 C910 220001000 C20 KIA7815API vv 1 vv Y R1103 ANN C C506 0 125 C E C 911 o dist C C401824CS04AFT C I 55 1 50 TTI R542 C C507 0 1125 C C C914 10025 7 20 C 4 8 m 521 0 1 25 8 C C913 0 125 C C82 RN5VD42C ERM H HW 5 THERMISTOR 2 5 5 5 2 C110 C522 0 22 10 C 8 C914 0 95 C C CT1IKID65003AF C EVAMZAR ONT SE 5 z 1 25 50 R307 C523 0 1250 C C918 220 10 C PAST FE a8 148153 yyy EAST FEED EIEIE H P Fase C C524 0 25 C F C C1101 10008 soc C 2 2 g E ni C 0 12500 C ci 10005 50 C 8 zT 5 INDICATION 620 0 1 C c1103 C SCILLATOR us 5 amp 3 3 gt 651 0 1 C C104 1000
49. 5921 1 20 X H IBEN OV 93 Table 11 1 The electric expansion valve is driven by DC 12 Power is supplied to 1 or 2 phases of 4 phase winding to switch magnetic pole of winding in order to control 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 1 of CN15 are about 0 9V they are about 12V when no power is supplied When power is reset initialization is performed for 10 or 20 seconds During initialization measure all voltages at pins 4 to 1 of CN15 using mutimeter If there is any pin with voltage that has not changed from around 0 9V or 12V expansion valve or microcomputer is defective e Fig 11 2 shows logic waveform when expansion valve is operating Table 11 2 Drive status 4 5 White ON OFF OFF Yellow OFF ON ON ON OFF Orange OFF OFF OFF ON ON Blue OFF OFF OFF OFF OFF Operation mode 1 2 3 4 5 6 7 8 VALVE CLOSE 8 7 6 5 4 3 gt 2 1 VALVE OPEN Pin No zu 50ms 75ms 200ms gt Fig 11 2 With expansion valve control opening degree is adjusted to stabilize target temperature by detecting temperature of compressor head The period of control is about once per 20 seconds and output a few pulses 78 12 Power Factor Control Circuit Power fa
50. 9F 1822 UU 2 2 0804 at 10201 En J 1 8 __ 1 CN20 WHT 1 TACHNO WETER SDE Ya Xon WHT 28 12P 97 TEST PIN SPM2 CAPA P W B 14 31 WHT 0 DOG fe gt gt fo on oee 30016 4 2 ROWS4 0 6 s011 Me 6 CIEI EPES EIE 63 eg MICON AX 6500 MAL m mum E Ye 052 AY TR TTE 6 0 6 0 1501 585 0505 0 1533 WHT WINICT 108 a 119 81 211 E PRONR M1CONR OTOP az B CUMPRESSOR MOTOR
51. PMRAD 50DH7 ROOM THERMISTOR N PMRAD 50DH7 THERMISTOR k PMRAD 18NH7A WIRE REMOTE CONTROL i PMRAS 07YHA 2P TERMINAL WITH FUSE 07 1 2P TERMINAL 106 MODEL RAC 50DH7 z o PART NO Q TY UNIT PARTS NAME PMRAC 50YHA1 COMPRESSOR KPNT1 PUSH NUT RAC 2226HV COMPRESSOR RUBBER PMRAC 70YHA CONDENSER PMRAC 50YHA1 1 6 3 1 1 REVERSING VALVE PMRAC 25NH4 ELECTRICAL EXPANSION COIL PMRAC 50NH4 VALVE 4S PMRAC 50NH4 VALVE 2S PMRAC 80YHA THERMISTOR OH PMRAC 25NH4 OVERHEAT THERMISTOR SUPPORT PMRAC 25NH4 OVERLOAD RELAY COVER PMRAC 70YHA THERMISTOR DEFROST PMRAC 60YHA1 COIL REVERSING VALVE 185 4 REACTOR PMRAD 50DH7 P W B MAIN PMRAC 80YHA SYSTEM POWER MODULE N PMRAC 25NH4 TERMINAL BOARD 4P PMRAM 65QH4 THERMISTOR OUTSIDE TEMPERATURE PMRAC 70YHA PROPELLER FAN PMRAC 70YHA SUPPORT FAN MOTOR PMRAC 70YHA FAN MOTOR PMRAC 70YHA CABINET PMRAC 70YHA NET PMRAC 24CP5 TOP COVER PMRAC 70YHA SIDE
52. UH 2HN ueduondo 1 PRO YENI zNOj 90521 T S LOLENO J0HINOJ 3lON3H 1V3H AUS 20 ES m LINN 5 P di X8 ONTA TASA 1941460 DENO wr 1 am O Jaa on G 07 5 NYE 9 VN ad vog TYNINUAL o dnd ang 387 146 INT LIINNGI 73A 3 NYO 73A 9 MU YOLEN NY g Es 4 3514 e LIHM 0460 98112384892 IHN 18M ne WD pu E One 272 ong euis i uyed iM 1HM dv og a387 210 EE E THM L 13 rw WAISAS 2 30010 _ nx N 118 7109 71109 ISNA AIE 1 HOL9V3H cx C C 5 H3MOd LINN YOOGLNO LINN HOOQNI LATOIA OIA ANd 0 1 NYO AVHO JLIHM MOTI3A TAA anid ZHQ0Z OVH HQ09 OVH 4HQd0S OVH VA4HG0Z QVH V4Hd09 QVH V4 HQ0S QVH I3GQOlN INVH9VIG SNIBIM 28 CIRCUIT DIAGRA
53. a conductive container for carrying and storing of parts Even rejected goods should be handled in the same way A conductive polyvinyl bag IC Conductive sponge Fig 1 Conductive Container 2 When any part is handled uncovered 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 1MQ grounding wire Fig 2 Body Earth 6 Use a three wire type soldering iron including a grounding wire Metal plate of aluminium stainless steel etc Working table Resistor of 1 MQ 1 2W Earth wire Bare copper wire for body earth 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 soldering iron Use high insulation mode 100V 10MQ or higher when ordinary iron is to be used 7 In checking circuits for maintenance inspection or some others be careful
54. good 92 CHECKING THE OUTDOOR UNIT ELECTRICAL PARTS eui dwel sisouDeip jjes pip iti yun aui ejeJedo ejejedo Buys sisouBeip jjes y ees eq osje 219 91 9 Z JOISUeA 14 seu OU uid 154 61 NO 0 UMOJA ESTE ve Sul SEH 4 AG sl sped Aue eoejdeu YMO eui S SOA Uonoeuuoo gt eui 109100 J e qeo pue 2 JeujeuM ees 0 9 10 UO uonduosep eui 995 Jewsou S sued Aue Jamod sioyboedeo 5 esnj aeui S epoip z eq osje syed 1eujo seu y JI SOK peioeuuoo y pue N 7 Jeulwa eJns N pue 1 peiddns 0 2 0220 SI uon
55. heat exchanger temperature zl heat exchange emer heat exchanger temperature 10sec heat exchanger temperature heat exchanger temperature 6 66 4465 min cL 7 4635 7 33 4800 Operation amp 7 66 4965 8 5135 WMAX 8 33 5300 8 66 5465 2 Rating 9 5635 min wid 9 33 5800 8 3000 in i WMIN 9 66 5965 min 10 6135 min 0 10 33 6300 ultra Hi Outdoor fan al 10 66 6465 Reversing valve heating model 1 1 6635 min 150sec Delay 150sec Delay 150sec Delay Notes 1 See the data in Table 1 on Notes page 47 for each constant in Condition for entering into Hot Dashed mode When fan set to Hi or Auto mode and i Indoor temperature is lower than 18 C and ii outdoor temperature is lower than 10 C capital letters in the diagrams and iii Temperature difference between indoor temperature and set temperature has a corresponding compressor rpm calculated value in Table 3 larger than WMAX Hot Dashed will release when i Room temperature has achieved the set temperature SFTDSW ii Thermo off During Hot Dashed operation thermo off temperature is set temperature with shift value 3 C After thermo off operation continue in Fuzzy control mode Compressor minimum time and OFF time is minutes During normal heating mode compressor maximum rpm WMAX will maintain for 120 minutes if indoor t
56. noise interference please place the indoor ane unit and its remote controller at least 1m away from electrical products place at least 1m away 1 V 27 20 WARNING Before cleaning stop unit operation with the remote controller and turn off the circuit breaker A CAUTION Do not expose the unit to water as it may cause an electric shock For cleaning inside the air conditioner consult your sales agent Avoid using detergent when cleaning the heat exchanger of the indoor unit Unit failure may result When cleaning the heat exchanger with a vacuum cleaner make sure to wear gloves so as not to injure your hands on the heat exchanger fins 1 AIR FILTER Clean the air filter as it removes dust inside the room Be sure to clean the filter once every two weeks so as not to consume electricity unnecessarily PROCEDURE 1 Loose screw and release the filter holders Pull the filter toward center to take it out from indoor unit refer to diagram Te Holders 4 2 Remove dust from the filter using a vacuum cleaner If there is ox M too much dust use neutral detergent After using neutral Screws detergent wash with clean water and dry in the shade 3 Install the filters Slightly lift the suction grille and close as original state Indoor Unit
57. output pin 69 of the microcomputer 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 Metal diaphragm Pizoelectric element the buzzer oscillates to generate the 7 buzzer s sound 2227722 A N Li ao o 2 V m V Sound wave M 0 Fig 2 2 Buzzer Operation 55 3 Initial Setting Circuit 401 When power is supplied the microcomputer reads the data in 401 and sets the preheating activation value and the rating and maximum speed of the compressor etc to their initial values Data of self diagnosis mode is stored in 401 data will be erased even when power is turned off 5V 5V 5V C401 5 3 Microcomputer SGL External 26 SDA 401 OV Fig 3 1 4 Room Temperature Thermistor Circuit e Fig 4 1 shows the room temperature thermistor circuit 5V L301 Room temperature thermistor R305 Room temp input Voltage at e The voltage at depends on the room temperature as shown in Fig 5 2 30 40 20 0 10 Room temperature C Fig 4 2 56 5 exchanger temperature thermistor circuit 5V Heat exchanger temperature thermistor Micro computer R307 Heat exchanger temperature 1 input Fig 5 1 5 PEUPLE
58. 0 0 90 8 00 B T U h 17 070 3 073 20 490 20 490 3 073 23 901 24 240 3 073 27 310 TOTAL INPUT W 1 590 200 2 200 2 130 200 2 600 2 340 200 3 100 HEATING TOTAL AMPERES A 7 30 6 70 9 75 9 00 10 70 9 80 kW 6 00 0 90 7 00 7 30 0 90 8 00 8 00 0 90 9 00 B T U h 20 490 3 073 23 901 24 920 3 073 27 315 27 310 3 073 30 730 DIMENSIONS mm 900 850 900 850 900 850 270 800 270 800 270 800 720 298 720 298 720 298 NET WEIGHT 35 55 35 55 35 55 After installation SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT APRIL 2008 Refrigeration amp Air Conditioning Division 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 manufacturers during maintenance and handling thereof They apply the same to handling of abnormal goods such as rejected goods being returned Object parts Micro computer Integrated circuits IC Field effect transistors FET P C boards or the like on which the parts mentioned in 1 and 2 of this paragraph are equipped 2 YS wa 1 2 3 4 Items to be observed in handling 1 Use
59. 0 360V approx 155 170V approx 155 170V DANGER Don t install the ground DISCHARGE PROCEDURE AND POWER SHUT OFF METHOD FOR POWER CIRCUIT Caution AN e Voltage of about 300 330V is charged between both ends of smoothing capacitors WARNING e During continuity check for each part of circuit in indoor unit electrical parts disconnect red gray lead wire connected from diode stack to system power module 2 to prevent secondary trouble Be sure to discharge smoothing capacitor 1 Turn OFF the Power supply to the outdoor unit 2 After power is turned off wait for 10 minutes or more Then remove electrical parts cover and apply soldering iron of 30 to 75W for 15 seconds or more to P2 and N1 terminals on system power module in order to discharge voltage in smoothing capacitor 3 Remove receptable of red gray lead wire connected to system power module from diode stack before performing operation chech of each circuit on hes As shown above apply soldering iron to metal Soldering parts receptable inside the sleeve iron corresponding to P1 1 terminals of system power module Do this with smoothing capacitors kept connected By removing red gray lead wire from diode stack power supply can be shut off corresponding to and System power module terminals of system power module Do not use a soldering iron with transformer If one is used thermal fuse inside transformer will be blown SMOOTHING CAPAC
60. 1 operates as follows 1 Shifting from OFF to ON DC about 330V is applied from smoothing capacitors C020 and in the control power circuit With this power current flows to pin 2 of IC1 via R701 and IC1 starts to turn ON Since voltage in the direction of arrow generates at point c at the same time current passing through R708 and D702 is positive fed back to IC1 2 During ON e The drain current at IC1 increases linearly During this period the gate voltage and current become constant because of the saturation characteristics of the transformer Shifting from ON to OFF e This circuit applies a negative feedback signal from the 12V output When the voltage across C708 reaches the specified value REG2 turns on and current flows to 7 2 This turns the secondary circuits on sets 1 to and turns off 69 4 During OFF While is on the following energy charges the primary windings of the transformer Energy Ll 2 Here L Primary inductance Current when is off This energy discharges to the secondary windings during power off That is C707 C710 C718 is charged according to the turn ratio of each winding e At the start an overcurrent flows to IC1 because of the charged current at C707 C710 C718 The drain current 1 generates a voltage across R716 If it exceeds the IC1 base voltage it sets the IC gate voltage to R716 limits the
61. 25A FUSE TERMINAL BLK 50861 ABSORBER VARISTORI 5 variston 10 8 10 8 KD 038 BEN 12V A 18161 V8 4PA34 STEE 1 8 00 4 BEN 12V B VATI VE 8 Patt 098 1 P 35V 8 1 e 0V 8 CO 8 8 REVERSING VALVE 983 3 T VB case TBRNINAL Gy INDOOR1 RED VHT Patt laen ov 00101 VARISTORZ 1 SW TRANS1 8103 0102 RTOS 8122 0915 8124 ena THT RRPACE D TTI 0955 BEN 12Y NP COIL 0812 802 INTERFACE RELAY2 0813 0815 BEN I2V Ne CUIGE 0813 603 INTERPACE RELAYS 0823 1824 vast WHT var ena 088 _ BEN I2V Ne 0814 5004 INTERFACE RELAYE 5833 2 09257 2 01 POWER RELAY el E 1002 RUSH CURRENT RELAY m ang 20118 4118 otio feror nw 0108 0 3EN OY IN ROSH CORRENT RELAY COIL NF BEN 12V A MERO REACTOR YH 28 1 8 H 0 of d
62. 30 8010 SNIMS INO 4015 LAdNI A3 JON3H3HHH NOILVOIJdIO3dS ONILVYAdO 401941430 NOlILVH3dO NOILVH43dO NOILIGNOO 1N3S3Hd NOILONN4A S9NIMS OLNV IVNDIS 53 DESCRIPTION OF MAIN CIRCUIT OPERATION MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A 1 Reset Circuit NORMAL HI RESET LO 7 RES 2 Microcomputer R522 d w 8 59 3 521 OV Fig 1 1 Power OFF gt Power ON y Voltage 5 0V Voltage supply to pin 2 of IC521 Reset release at 4 4V Reset enter at 4 2V voltage Voltage at pin 7 5 0 of microcomputer Fig 1 2 The reset circuit initializes the microcomputer program when power is ON or OFF Low voltage at pin 7 resets the microcomputer and Hi activates the microcomputer When power 5V voltage rises and reaches 4 4V pin 1 of IC521 is set to At this time the microcomputer starts operation e When power OFF voltage drops and reaches 4 2V pin 1 of 12521 is set to Low This will RESET the microcomputer 54 2 Buzzer Circuit Microcomputer 1 Buzzer output 30 gt 1 AW 0722 Fig 2 1 Buzzer Circuit e When the buzzer sounds an approx 3 9kHz square signal is output from buzzer
63. 4 Switching incomplete LD301 times SYSTEM POWER LD301 POWER PWB MODULE SPM2 LD302 LD304 From results of power module simple inspection inspection mode when operated with compressor lead disconnected LD310 blinks four times about 2 seconds later Unit has not entered the normal operation 68 4 Power Supply Circuit e Fig 4 1 shows the power circuit SW TRANSFORMER 1 0113 170118 ini Oov 4 718 0710 uz T OFM 15V a mST ju 5 C135 T Q 12V 49 d REGI 5 9 0105 1 Te DIODE STACK rd 0702 R708 TT i A t 0706 oi 1 19 8123 4 5 cat Sy sg a 5 5 8122 _ 0175 8124 0701 te zc 10733 Q1 C820 RTO 4 RTI p 1 R7253 Fi g 4 1 Power circuit for P W B There are two switching power supply in Power PWB Switching power supply 1 is generating the secondary power for control circuits and DC35V indoor unit Switching power supply performs voltage conversion effectively by switching transistor 1 to convert DC330V to high frequency of approximately 20kHz to 200kHz Transistor IC
64. 5 2 between cathode and 01 and C701 may be mode of D701 defective Is DC 12V being supplied There is a defective between Is DC 12V being output accross the control side the 12V output of switching coil terminal of interface relay power supply and interface relay Replace the interface relay Is DC 5V being output CY Replace IC101 Perform final operation check 91 CHECKING THE REMOTE CONTROLLER Is battery polarity correct Install the battery in the correct polarity Yes Y Yes 15 the battery check sign flashing Replace the battery No V Turn on an AM radio bring the remote control switch within 15 cm of the radio and press the ON OFF button V Does the radio buzz noisily No gt Check the LED D1 with a multimeter Yes V Check the indoor unit signal receiving P W B If it is good check the main P W B AM radio You can check the remote control switch by other methods as explained below Using the test card Ultra redray test card a Sensible area Check functions again If it does not work replace Within 2 cm the remote controller The sensible area should flash in orange when you operate the remote control unit if it is
65. 5 4 PMRAC 70DH7 P W B MAIN SYSTEM POWER MODULE N PMRAC 25NH4 TERMINAL BOARD 4P PMRAM 65QH4 THERMISTOR OUTSIDE TEMPERATURE PMRAC 70YHA PROPELLER FAN PMRAC 70YHA SUPPORT FAN MOTOR PMRAC 70YHA FAN MOTOR PMRAC 70YHA CABINET PMRAC 70YHA NET PMRAC 24CP5 TOP COVER PMRAC 70YHA SIDE PLATE R n2 PMRAC 70YHA STRAINER COND d PMRAC 70YHA STRAINER PIPE PMRAC 70YHA SIDE PLATE L PMRAC 70YHA GRILL EXPANSION VALVE PMRAC 70YHA SV COVER PMRAC 70YHA NET COVER Co PMRAC 63CA1 TERMINAL BOARD 2P PMRAC 70YHA NOISE FILTER BOARD PMRAC 50DH7 POWER BOARD 110 RAD 50DH7A RAC 50DH7 RAD 60DH7A RAC 60DH7 PM NO 0411E RAD 70DH7A RAC 70DH7 Printed in Malaysia
66. 50V OUTPUT 56 80W CONNECTION BLU BLUE GRY GRAY BLK BLACK Control circuit built in YEL YELLOW BRN BROWN WHT WHITE ORN ORANGE GRN GREEN RED RED PNK PINK VIOLET 06 COMPRESSOR MOTOR Compressor Motor Specifications MODEL RAC 50DH7 RAC 60DH7 RAC 70DH7 COMPRESSOR MODEL JU1015D4 PHASE SINGLE RATED VOLTAGE AC 220 240 V RATED FREQUENCY 50 Hz POLE NUMBER 4 WHITE CONNECTION YELLOW RESISTANCE VALUE Q 2M 1 268 W S RED V R YELLOW U C WHITE A CAUTION When the Air Conditioner has been operated for a long time with the capillary tubes clogged or crushed or with too little coolant check the color of the refrigerant oil inside the compressor If the color has been changed conspicuously replace the compressor 07 AN WA NOISNVdX3 31419313 HM ROSH HOLSTWYSHL GNO 1V3HH3A0 m 78 HOLSIWH3HL REN ONO 1509330 M quss AA LNO HOOOLNO 1HM 1HM 1HM
67. 7 tur W T TA mns 7 10k s life c ios isos 1 7 en 101 we w sk isos 1 7 en A N 100 4 ut eno 0 047 5t pmo F L a 100 s 100 a 41 7 un ees Tm Wilde i 7 100 A 100 sk 1 N Cut 01 25 fists un n 7 it 8407 100 sk 7 TIT iH 7 100 ios REDS iu mw isos is isos en um WU 5 1 i 7 Read tk a ue w sore isos x ens 1 ios 7 ae inr t 8245 sak A TIT 4021 Wu Cre 4700p 51 3 A 1404 3 T 1 7 101 we ater eur
68. 70DH7 340 22 298 20 gt lt 74 168 lt gt JC a Handle JI T JC JC IC JC 3 JC JC 1 SS ft Ji Air suction grille Handle lt Air outlet Holes for anchor bolt 2 012 Fixing hole Notch for anchor 2 012 Notchs 25 gt More than 700 gt 100 gt Service space PARTS COMPONENT THERMOSTAT Room Temperature Thermistor Thermostat Specifications MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A THERMOSTAT MODEL OPERATION MODE HEAT TEMPERATURE C F FAN MOTOR INDICATION 15 6 60 1 20 0 68 0 16 15 3 59 5 20 7 69 3 INDICATION 24 23 3 73 9 28 7 83 7 INDICATION 31 6 88 9 36 0 96 8 32 Fan Motor Specifications MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A 60 1 59 5 23 6 74 5 28 0 82 4 73 9 88 9 88 3 31 3 88 3 36 7 98 1 RAC 50DH7 RAC 60DH7 RAC 70DH7 POWER SOURCE DC 280V DC3
69. 9 50 C By C sr 0 FREQ FOR ous m 2 ve 1 5 C711 0 1 25 C 1105 10008 50 B C ES 1 CSTLS10MHZ 10NHq_R de 5y IC501 t T ROT R 5 FRESE ID SET 442 WT 7 C C le C C d BN PN ls 5 oL 723 GE g c201 100450 D H TIT id TIE C ZENER DIODE 7D FAN POWER 5 9 O B RC pm ii 3 8 R657 1103 M E B 202 0 100 C803 0 25 C1109 biu PART NO FORM EEPROM spA Di N du gt V E 203 10 16 p 0 zpooiRpisviN3 c 1 gt H 5 gt 1 PM 1 40 E 2 ENT sail gd 5 2 4 R16 R743 1743 XT 204 0 150 C C 082110 01 50 F R TRANSISTOR INDUCTANCE 51 Wv ANN Vout 905 5 B m T Le 208 0 50 822 1000 50 08 C gt ON GND 1000r 50 c 823 0 041 25 gt a E N 2 5 RAS RIAL 10 4 0403 odd SU FEEDBACK 5 RT A 1G 1G 207 1000 50 C C c824 0 01 solem C 5 5 T O O 208 0 125 C 825 0 125 C aa 0V 1401 P35 MAIN SU
70. A CAUTION Do not wash with hot water at more than 40 C The filter may shrink When washing it shake off moisture completely and dry it in the shade do not expose it directly to the sun The filter may shrink Do not operate the air conditioner with the filter removed Dust may enter the air conditioner and cause trouble 21 REGULAR INSPECTION PLEASE CHECK THE FOLLOWING POINTS BY QUALIFIED SERVICE PERSONAL EITHER EVERY HALF YEARLY OR YEARLY CONTACT YOUR SALES AGENT OR SERVICE SHOP 2 UN 1 Is the earth line disconnected or broken Is the mounting frame seriously affected by rust and is the 2 outdoor unit tilted or unstable 3 Is the plug of power line firmly plugged into the socket Please ensure no loose contact between them J AFTER SALE SERVICE AND WARRANTY WHEN ASKING FOR SERVICE CHECK THE FOLLOWING POINTS CONDITION CHECK THE FOLLOWING POINTS 5 fuse all right When it does not operate 5 the voltage extremely high or low e ls the circuit breaker e Was the air filter cleaned e Does sunlight fall directly on the outdoor unit When it does not cool well e ls the air flow of the outdoor unit obstructed When it does not hot well e Are the doors or windows opened or is there any source of heat in the room e 15 the set temperature suitable NS S N Notes e
71. DH7A RAD 60DH7A RAD 70DH7A 900 270 720 C RAC 50DH7 RAC 60DH7 RAC 70DH7 850 800 298 J 6 On switching on the equipment particularly when the room light is dimmed a slight brightness fluctuation may occur This is of no consequence The conditions of the local Power Supply Companies are to be observed Note e Avoid to use the room air conditioner for cooling operation when the outside temperature is below 21 C 70 F The recommended maximum and minimum operating temperatures of the hot and cold sides should be as below Cooling Heating Minimum Maximum Minimum Maximum Dry bulb C 21 32 20 27 Indoor Wet bulb C 15 23 12 19 Dry bulb C 21 43 2 21 Outd Wet bulb C 15 26 1 15 SAFETY PRECAUTION Please read the Safety Precaution carefully before operating the unit to ensure correct usage of the unit Pay special attention to signs of Warning Caution The Warning section contains matters which if not observed strictly may cause death or serious injury The Caution section contains matters which may result in serious consequences if not observed properly Please observe all instructions strictly to ensure safety The sign indicate the following meanings e Make sure to connect earth line The sign in the figure indicates prohibition Q Indicates the inst
72. EHI 7 TE 7 hu T R302 we ens 41 7 i bw u 2303 we TIT 5 8 1 fa f enf ini por Li s 8 xu gt LEN UA B Annan a cus BIZE Diss TE c a wan eur was CA ep HT Baye en 2 PF the TIT W ens 5 081 TIT TEE 5 ene 1 so e nu cect prat an i i tu m a ne x we x n CST YI IUS D IH a wan Bn Britt SERE ent 1 ve 4 ak Prud uua ena 1 5t F ani rm 1 5K 1 1 A 0725 NICON 9 4 i 8318 RASI 200 5 A 2125 en 25 2 EEPRON S24CILBEJ T8 5 4 Tw 6319 10 5K 1 8 A en 470p 161 318 P6523 B
73. F indoor fan will be OFF for 5 minutes and ON for 1 minute The compressor is operated forcedly for 3 minutes after operation is started 2 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 S The minimum ON time and OFF time of the compressor are 3 minutes 45 Table 3 ATWMAX Basic Heating Operation Atd gt Temperature Calculated difference compressor rpm 1 66 1965 2 2135 2 33 2300 2 66 2465 3 2635 3 33 2800 3 66 2965 4 3135 4 33 3300 4 66 3465 5 3635 5 33 3800 Heating set temperature remote control set temperature Dash period ATWMAX Fan speed set to auto Start Start stop switch Start Thermo judgment Thermo z ST OFF 5 66 3965 min reheating judgment Ultra Hi 0 0 _ 30sec 30sec 3 0 6 4135 min Indoor fan Hi 30sec 6 33 4300 Control by H Control by 5 Control by Control by LH Control by Lo m
74. IFY depending on the current room temperature The selected mode of operation will change when the room temperature varies Press the FUNCTION selector so that the display indicates the AUTO mode of operation 1 When AUTO has been selected the device will automatically determine the mode of operation HEAT COOL or DEHUMIDIFY depending on the current room temperature However the mode of operation will not change when indoor unit connected to multi type outdoor unit the mode automatically selected by the unit is not satisfactory manually change the mode setting heat HITACHI dehumidify cool or fan START Press the 0 START STOP button Operation starts with a beep STOP Press the button again to stop operation y As the settings are stored in memory in the remote controller you only have to press the START STOP button next time SPEED AUTO When the AUTO fan speed mode is set the cooling heating operation 7 ex The fan speed will automatically change according to the temperature of discharged air For the heating operation When the difference of room temperature and setting temperature is large fan starts to run at HI speed When the room temperature reaches setting temperature fan speed changes to LOW automatically When the difference of room temperatur
75. ITORS LI SYSTEM POWER MODULE SPM2 84 xd TROUBLESHOOTING WHEN TIMER LAMP BLINKS Model RAD 50DH7A RAD 60DH7A RAD 70DH7A Perform troubleshooting according to the number of times the indoor timer lamp and outdoor LD301 blink SELF DIAGNOSIS LIGHTING MODE Model RAD 50DH7A RAD 60DH7A RAD 70DH7A Remark If using wired remote controller electrical cover have to be opened so that timer lamp at indoor p w b can be seen as Fig 1 If using wireless remote controller optional part no need to open electrical cover Refer the timer lamp at panel as Fig 2 TIMER LAMP LED6 GREEN PANEL AS UE m ooo 9 ej MEE as m TIMER LAMP Fig 1 Fig 2 No Timer indicator flashing mode Reason for display Section of estimated fault Four way valve faulty A 1 Four way
76. M Wired Remote Control LCD 20109 Xe X7 XeXS X4 X3X2X EEX o O 12V RED R1 For Wired SEG15 46 P20 SEG16 P23 SEG19 OV BLACK For Wired M3455268HFP OTPMICON M34552M4H 116FP MASKMICON IC Specification Form LCD Specification IC LCD 53WA Diode 425D 01 RB4250 Zenner diode Symbol Form 201 HZK3BTR 3 Capacitor stl F 1004F 6 3V F Transistor 25013285 Size of Resistor and C Capacitor 5 5216 Size 2 2125 Size 1 1608 Size Resonators Symbol Specification C ROO2RX 32 768kHz CSTCC3 64MG0H6 3 64MHz Resistor Symbol Specification Re 1 C R8 10 1 C R9 1 1 16 1 C jumper mbol moe 1uF 16V 22 50 22pF 50V S F 16V Table1 Key matrix table MPOO PO1 PO2 29 CIRCUIT DIAGRAM MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A
77. Micro compute Buzzer r Static pressure switch Normal Normal High Low Static pressure sw Test Drain pump test drive sw When set to High the revolution per minute will increase 100 and when set to Low the revolution per minute will decrease 200 60 1 Power Circuit RAC 50DH7 RAC 60DH7 RAC 70DH7 REACTOR EE 5 lt lt TERMINAL Power P W B DIODE 5 BOARD STACK 1 25A FUSE POWER RELAY CO T ES E ES a 1 4 1 8 42 1995 S B R002 ns INRUSH CURRENT RELAY ht of ABSORBER F SERI TT 2 y 5 d b of Wa Ls 38 pee ds BE EE 1 5 ar 4 m 4 1007 VARISTOR2 05 GRN1 1103 58 1 8 88 1005 2 P1 GRN2 09 4 wW Hi FT LE 1006 ole GRN3 EIE 5 1515 Fig 1 1 This circuit full wave 220 240 AC applied between terminals L and boosts it to required voltage with the active module
78. PLATE R PMRAC 70YHA STRAINER COND N PMRAC 70YHA STRAINER PIPE PMRAC 70YHA SIDE PLATE L PMRAC 70YHA GRILL PMRAC 80YHA EXPANSION VALVE PMRAC 70YHA SV COVER PMRAC 70YHA NET COVER PMRAC 63CA1 TERMINAL BOARD 2P CAPACITOR BOARD PMRAC 70YHA NOISE FILTER BOARD PMRAD 50DH7 POWER BOARD 108 MODEL RAC 60DH7 z o PART NO Q TY UNIT PARTS NAME PMRAC 50YHA1 COMPRESSOR KPNT1 PUSH NUT RAC 2226HV COMPRESSOR RUBBER PMRAC 70YHA CONDENSER PMRAC 50YHA1 REVERSING VALVE PMRAC 25NH4 ELECTRICAL EXPANSION COIL PMRAC 50NH4 VALVE 4S PMRAC 50NH4 VALVE 25 PMRAC 80YHA THERMISTOR OH PMRAC 25NH4 OVERHEAT THERMISTOR SUPPORT PMRAC 25NH4 OVERLOAD RELAY COVER PMRAC 70YHA THERMISTOR DEFROST k PMRAC 60YHA1 COIL REVERSING VALVE AB 185 4 REACTOR k PMRAC 60DH7 P W B MAIN SYSTEM POWER MODULE TM PMRAC 25NH4 TERMINAL BOARD 4P PMRAM 65QH4 THERMISTOR OUTSIDE TEMPERATURE k PMRAC 70YHA P
79. RICAL PARTS 1 Power does not come on no operation No Is DC 35V being generated between Is 220 240 being generated Check AC outlet and breaker and repair any defective part between terminals L and N on the outdoor unit terminal board terminals C and D on the terminal board Is DC 35V being generated between YeS Check the indoor outdoor unit terminals C and D on the outdoor connection cable and correct any defective section wrong connection incomplete insertion reversed unit terminal board No Check the outdoor unit power circuit and repair the defective section No Are control voltages 12V 5V Check according to the proper method being generated normally for checking the power circuit Yes Do the air deflectors perform initial Yes Check the indication P W B operation when the power supply is LM connection cord and light receiving turned on and off unit No Is the microcomputer reset input Check the reset circuit and repair pin 7 Hi any defective section Is the microcomputer clock signal No Replace the microcomputer and 10MHz at pin 9 3 being generated normally Yes Replace the control P W B Perform final operation check 88 2 Outdoor unit does not operate but receives remote infrared signal Set to room temperature 16 C in the cooling mode or to 32 C in the heating mode and press the s
80. ROPELLER FAN PMRAC 70YHA SUPPORT FAN MOTOR PMRAC 70YHA FAN MOTOR PMRAC 70YHA CABINET PMRAC 70YHA NET 24 5 TOP COVER PMRAC 70YHA SIDE PLATE R PMRAC 70YHA STRAINER COND N PMRAC 70YHA STRAINER PIPE PMRAC 70YHA SIDE PLATE L n2 PMRAC 70YHA GRILL EXPANSION VALVE PMRAC 70YHA SV COVER PMRAC 70YHA NET COVER PMRAC 63CA1 TERMINAL BOARD 2P CAPACITOR BOARD PMRAC 70YHA NOISE FILTER BOARD PMRAC 50DH7 109 POWER BOARD MODEL RAC 70DH7 z 9 PART Q TY UNIT PARTS NAME PMRAC 50YHA1 COMPRESSOR KPNT1 PUSH NUT RAC 2226HV COMPRESSOR RUBBER PMRAC 70YHA CONDENSER PMRAC 50YHA1 REVERSING VALVE PMRAC 25NH4 ELECTRICAL EXPANSION COIL PMRAC 80YHA VALVE 58 PMRAC 50NH4 VALVE 25 PMRAC 80YHA THERMISTOR OH PMRAC 25NH4 OVERHEAT THERMISTOR SUPPORT k PMRAC 25NH4 OVERLOAD RELAY COVER k PMRAC 70YHA THERMISTOR DEFROST Sk PMRAC 60YHA1 COIL REVERSING VALVE 18
81. TING 0 LEAK OF REFRIGERANT COMPRESSOR THERMSTOR CIRC DURING OPERATION 6 TIMES TEMP RISE FAN MOTOR FAN MOTOR CIRCUIT NORMAL COMPRESSOR 2 NO ACCELERATION ABOVE THE LEAK OF REFRIGERANT eio NOT MALFUNCTION E ON LOWER LMT OF THE ROTATION D COMPRESSOR OVERLOAD 1 2 E 5 BN 5 POWER SUPPLY d VOLTAGE S 5 ReCePraCle OF WRE AT SYSTEM EN POWER NODULE 5 NOT PROPERLY EG 0 TIMES VOLTAGE ERROR med Ed THIS SHOWS AN EX aun TIME d FAN IRCU OVERLOAD UNER OVERLOAD CONDITION 2 TIMES ERROR EERU 5o Vx EEPROM READNG JOHAN PB PROTECT THE COMPRESSOR TIMES ERROR 349 EXAMPLE OF Bre LIGHTS FOR 025 SEC ACTIVE CONVERTER OVER VOLTAGE 5 DETECTED o SYSTEM POWER MODULE BLINKNG 5 TIMES BR INTERVAL OF 025 SEC TIMES DEFECTIVE BY SYSTEM POWER MODULE THERMISTOR IS OPENED OR THERMSTOR CORRESPONDENCE TABLE FOR ABNORMAL THERMISTOR LIE ABNORMAL BLINK G ABNORMAL THERMISTOR LIT 1 3 TIMES THERMISTOR CORRESPONDENCE TABLE THERMISTOR CIRCUIT 1 TME OVERHEAT THERMISTOR COMMUNICATION ERROR WHEN INDOOR UNIT IS NOT CABLE IS WRONG CONNECTED E CONNECTED IT BLINKS CABLE IS OPEN 2 TIMES DEFROST THERMISTOR 1 TIMES d m AND SMLARLY NOT MULEUNTION INTERFACE CRCUT BETWEEN INDOOR TIMES OUTDOOR TEMPERATURE THERMISTOR AND OUTDOOR UNIT BLK BLACK GRY GRAY
82. UNIT 1 Turn off the power supply to outdoor unit and then turn on again 2 Remove the electrical box cover LD303 red will light and the unit will operate in the forced cooling mode at this time Never operate the unit for 7 ES more than 5 minutes Service switch forced cooling mode is set by pressing for 1 second or more and stopped by pressing again Electrical Box Cover Self diagnosis lamps LD303 302 301 Se Cautions 1 If interface signal DC 35V terminals and D not connected when the outdoor unit is in forced cool mode the outdoor unit defect indicator LD301 will blink 9 times during operation to indicate communication 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 push the service switch again to stop the forced cool operation 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 prepared Outdoor unit Connect the small diameter Compressor service value and the large
83. V Normally Hi 4 5V e This is a float type switch that monitors the drain level of drain pan The switch will be activated and will stop operation if the drain pump is faulty or drain hose is stopped up disabling drainage causing the drain level to rise abnormally e When the float switch is activated the timer indicator will flash six times Note that the float switch will also be activated disabling operation if the connector of float switch has defective contact or is connected incompletely 9 Drain pump drive circuit Micro computer 11 12V Drain pump 69 5 2 gt 042 DRAIN PUMP RELLAY 3 15A FUSE 230 Drain pump motor GRN1 Drain pump drive circuit is using drain pump relay that control by micro computer pin no 58 to drive the drain pump 58 10 Indoor Fan Motor Feedback Circuit JOINT CONNECTOR VDC RPM FEED BACK SIGNAL MICON PIN 2 tT OUTPUT SIGNAL _ MICON PIN 9 9 2 N A ha oly Y ov Y Fig 10 1 e lt Exp of circuit wave gt FAN MOTOR VS VOLTAGE CN2 BETWEEN PIN MICON 9 PIN VOLTAGE VOLTAGE FG FAN MOTOR RELATION BETWEEN JOINT BETWEEN 69 BETWEEN PINO Low speed 700min High speed 1200
84. aker Overloads are judged by comparing the DC current level and set value Fig 8 1 shows the overload control system configuration and Fig 8 2 is a characteristic diagram of overload judgement values There are two judgement methods external judgement which compares the externally set value with the DC current value regardless of the rotation speed and internal judgement which compares the set value that varies according to the rotation speed programmed in the microcomputer software with the DC current value Translation To power module AX 6V01 micro computer Motor control Rotation speed data 5 negative terminal 8 9 Judgement OVL oy with respect to externally set process R503 value Detection resistor Judgement OVL Voltage gt ms ter m according to the rotation circui speed Internal judgement Primary mme AID Selects data according LJ DC voltage gt converter to the rotation speed and lt CT m gt DC voltage AD OVL start t dat o RC filter circuit converter SIMI OV OV Fig 8 1 Overload Control System Configuration External judgement value a Judgement value according to the rotation speed internal judgement value Rotation speed Fig 8 2 E
85. and R702 and IC1 pin 5 to be measured at R216 lead may be between 11 and 16V This is because the protection circuit of IC is operating 70 6 Rotor magnetic pole position detection circuit Inverter DC brushless motor for compressor 412V ZR505 ZR504 8503 Microcomputer of outdoor unit Fig 6 1 Rotor magnetic pole position detection circuit When the DC brushless motor is rotated it also operates as power generator generating reverse electromotive force according to number of rotations This reverse electromotive force is voltage divided by R503 R505 and R608 R610 and appears as point voltage IC3 compares and digitalizes point voltage with point voltage in which DC voltage Vd is voltage divided by R501 R502 and R61 1 and inputs this to microcomputer as position detection signals for points D and Microcomputer switches inverter using optimum timing based on position detection signals in order to control the rotation of the brushless motor ee 7 Peripheral circuit of microcomputer e Fig 7 1 shows the microcomputer and its peripheral circuits Table 7 1 the basic operations of each circuit block and Fig 7 2 the system configuration 12V La 5V N o 8 Outdoor e 0205 Microcomputer 0212
86. and the compressor may not operate at all Also be aware that the 5A fuse might have blown 3 Smoothing capacitor C501 C502 C503 This smoothes averages the voltage rectified by the diode stacks Smoothing Capacitors SPM2 Fig 1 2 Vd DC voltage approx 260 360V during operation Fig 1 3 4 Smoothing capacitor C020 This smoothes averages the voltage rectified by the diode stack2 A DC voltage is generated in the same way as in Fig 1 3 Voltage between side of C020 is about 330V b C001 to C012 to C015 C007 C008 NF COIL1 COIL C22 C25 absorb electrical noise generated during operation of compressor and also absorb external noise entering from power line to protect electronic parts 6 Surge absorber Varistor 1 2 3 absorbs external power surge 7 Inrush protective resistor R002 R003 This works to protect from overcurrent when power is turned on 62 e Be 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 The circuit board could be damaged lt Reference gt When inrush protective resistor is defective diode stack may malfunction As a resul DC voltage is not generated and no operation can be done 2 Indoor Outdoor Interface Circuit e The interface circuit superimposes an interface signal on the DC 35V line su
87. ation Room temperature ATCMAX Fan speed set to auto Thermo judgment Ultra Hi Indoor fan Ultra Lo Engaged in the set fan speed in cases other than auto fan speed Operation lamp 5 5 a a a 5 Outdoor fan Reversing valve heating on mode Rating _ 1 min NOTE 9 Notes Condition for entering into Cool Dashed mode When fan set to Hi or Auto mode and temperature difference between indoor temperature and set temperature has a corresponding compressor rpm calculated value in Table 2 larger than WMAX Cool Dashed will release when i a maximum 25 minutes is lapsed and ii room temperature is lower than set temperature 3 C thermo off and iii when room temperature has achieved setting temperature 1 C then maximum Cool Dashed time will be revised to 20 minutes And iv indoor fan is set to Lo and Med fan mode v change operation mode During Cool Dashed operation thermo off temperature is set temperature with shift value 3 C 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 tim
88. correspondence between the thermistor s resistance and the temperature They should be used as reference values The value which you measure may be slightly difference from that in the table It depends on the instrument When you measure the resistance pull out the connector after turning off the power supply Pulling out the connector while the power supply is turned on will cause troubles Indoor unit WIDE PIPE The thermistors detect the temperatures of the piping to the indoor units The temperatures are used to decide how much the expansion valve is opened Table 10 2 Correspondence between each thermistor s resistance and temperature reference value Electric expansion valve thermistor DEF thermistor Microcomputer Temperature Resistance bir potential 12 6kQ 1 0V 6 1kQ 1 7V 2 2kQ 3 0V 860Q 3 9V 4000 44 Outdoor temperature thermistor Temperature Resistance Potential 12 6kQ 1 0V 6 1kQ 1 7V 3 2kQ 2 4V 2k 3 1V OH thermistor 76 Potential Temperature Resistance 0 5V 33 9kQ 1 3V 10 8kQ 2 4V 4 1kQ 1 7kQ 3 4V 3 6V 1 5kQ 1kQ 3 9V When the connectors of the thermistors are disconnected the thermistors is open or short LD301 red lights and LD302 red blinks so that they indicate troubled parts Combinations of LD301 and LD302 are set up for
89. ct them securely Is the DC voltage at least 350V Yes Is the OVL lamp lit If the lamp is lit it does not If abnormality continues replace the system power module indicate fault but the unit is overload status Overvoltage defect system power module faulty 15 times blinking 98 CHECKING THE REFRIGERATING CYCLE UUDGING BETWEEN GAS LEAKAGE AND COMPRESSOR DEFECTIVE 1 Troubleshooting procedure No operation No heating No cooling Lighting mode D Ser um 2 times 4 times 5 mes 6 times times power module again and operate the air conditioner LD301 YH 4 2 4 Within 10 seconds 10 Approx 10 seconds seconds seconds Possible malfunctioning Compressor Compressor part leakage Blinking Is the self diagnosis lamp mode as shown on the right YES Normal 0 39 0 98 MPaG 4 10 kg cm G Stop to operate and check the gas Checking the system power module pressure in balancing mode Gas leaking less than 4kg cm G When the less than 0 39 MPaG 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
90. ctor is controlled by almost 100 Effective use of power With IC in ACT module control is performed so that input current waveform will be similar to waveform of input voltage input current TES V input voltage Effective voltage area Effective voltage area Invalid power area Even if voltage is applied current does not flow Assuming the same current capacity 20A power can be used about 10 effective comparing with curent use power factor of 90 and maximum capacity is thereby improved SERVICE CALL amp A COOLING MODE The compressor has stopped suddenly during cooling operation Check if the indoor heat exchanger is frosted Wait for 3 4 minutes until it is defrosted Sound of running water is heard from indoor unit during dehumidifying If the air conditioner operates in cooling mode when it is cold the evaporator may get frosted Normal sound when refrigerant flows in pipe Compressor occasionally does not operate during dehumidifying The circulation stops occasionally during Heating mode When the fan speed is set at HIGH or MED the flow is actually Weak Heating operation stops while the temperature is preset at 30 Compressor may not operate when room temperature is 10 C or less It also stops when the humidity is preset humidity or less It occurs during defrost ing Wait for 5 10 minutes until the condenser i
91. d to receiving input of the indoor microcomputer Fig 2 2 shows the voltages at each component when data is transferred from the outdoor microcomputer to the indoor microcomputer e Indoor microcomputer to outdoor microcomputer The communications from the indoor microcomputer to the outdoor micro computer are the same Fig 2 3 shows the voltages and waveforms at each circuit 63 Fig 2 1 shows the interface circuit used for the indoor and outdoor microcomputers to communicate with each other HIC 5V 5V 5V 5V R813 C802 R812 Q803 R810 oe lt IF transmit C804 R811 j output SDO Y 0 V OV Micro ov 5V 5V 5V 9 computer cai ita IF receive OV T input SDI C822 010 5 OV t OV OV OV ov Pee OE NE 0 0 Terminal board Indoor P W B Outdoor P W B D OO Teminaboard T Q201 85V Ae mener 1 1 1 1 1 73 5001 OV 5V 14 AAA 1801 R801 R802 0801 2 R255 Interface 5V 5V 6 iss R262 R259 8258 R254 88 a R257 1 oV 1 C804 C802 8261 NS FE Q206 C216 R260 9 803 2 oV Y OV cios coiL2 ov L811 3 VF OV LLL
92. ditions 4 Press 0 START STOP button Heating operation starts 4 STOP with beep Press the button again to stop operation J 1 As settings are stored in memory the remote controller you only have to press the D START STOP button next time HITACHI DEHUMIDIFYING OPERATION Use the device for dehumidifying when the room temperature is over 16 C When it is under 15 C the dehumidifying function will not work S Press the FUNCTION selector so that the display indicates DEHUMIDIFY The FAN SPEED is set at LOW or SILENT Set the desired room temperature with the TEMPERATURE button the display indicates the setting 2 I The range of 20 26 is recommended as Te E the room temperature for dehumidifying 0000 START Press the 0 START STOP button Dehumidifying operation STOP starts with a beep Press the button again to stop operation A As the settings are stored in memory in the remote controller you only have to press the D START STOP button next time 53503 A CD Dehumidifying Funct
93. e and setting temperature is large fan starts to run at HI speed For the cooling operation After room temperature reaches the preset temperature the cooling operation which changes the fan speed and room temperature to obtain optimum conditions for natural healthful cooling will be performed 11 HEATING OPERATION e Use the device for heating when the outdoor temperature is under 21 C When it is too warm over 21 C the heating function may not work in order to protect the device to keep reliability of the device please use this device above 15 C of the outdoor temperature Press the FUNCTION selector so that the display indicates HEAT Set the desired FAN SPEED with the FAN SPEED button 1 the display indicates the setting AUTO The fan speed is HI at first and varies 6 to MED automatically when preset 2 temperature has been reached E HI Economical as the room will become warm quickly But you may feel a chill at the beginning MED Fan speed slow LOW Fan speed slower Oo 6 6 HITACHI SILENT Fan speed ultra slower Set the desired room temperature with the TEMPERATURE buttons the display indicates the setting 3 The temperature setting and the actual room temperature may vary somewhat depending on con
94. e constrain if indoor temperature is higher than CLMXTP 6 During Cool Dashed when room temperature reaches set temperature 1 C compressor rpm is actual rom x DWNRATEC Temperature difference Table 2 ATCMAX Calculated compressor rpm 1 66 2265 2 2435 2 33 2600 2 66 2765 min 3 2935 min 3 33 3100 3 66 3265 4 3435 4 33 3600 4 66 3765 min 5 3935 5 33 4100 5 66 4265 6 4435 6 33 4600 6 66 4765 7 4935 min 7 33 5100 7 66 5265 8 5435 8 33 5600 8 66 5765 9 5935 min 9 33 6100 9 66 6265 10 6435 10 33 6600 10 66 6765 11 6935 min 41 Cooling Sleep Operation 1 Set to 7 hours Sleep key Operation lamp Timer lamp Indoor fan Med See basic operation Lo sleep Outdoor fan Lo 1 1 Compressor speed Notes 1 The sleep operation starts when the sleep key is pressed 2 When the sleep key is set the maximum compressor speed is limited and the indoor fan is set to sleep Lo
95. ed 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 SPECIFICATIONS MODEL RAD 50DH7A RAD 60DH7A RAD 70DH7A RAC 50DH7 RAC 60DH7 RAC 70DH7 FAN MOTOR 56 W 80 W FAN MOTOR CAPACITOR NO NO FAN MOTOR PROTECTOR NO NO COMPRESSOR JU1015D4 COMPRESSOR MOTOR CAPACITOR NO OVERLOAD PROTECTOR NO OVERHEAT PROTECTOR FUSE MICRO COMPUTER CIRCUIT POWER RELAY POWER SWITCH TEMPORARY SWITCH SERVICE SWITCH TRANSFORMER VARISTOR NOISE SUPPRESSOR THERMOSTAT REMOTE CONTROL SWITCH LIQUID CRYSTAL NO 30 A TIME DELAY FUSE UNIT 18009 REFRIGERANT CHARGING VOLUME Refrigerant R410A PIPES MAX 30m MIN 5m Figure showing installation of Indoor and Outdoor unit CAUTION Install the indoor unit with a proper clearance around it for operation and maintenance working space case that the ceiling board can not be detected for servicing prepare a service access door below the indoor unit for removing the indoor unit The indoor piping should be insulated with the enclosed insulation pipe If the insulator is insufficient please use commercial products Be sure to completely seal any gap with pu
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97. emperature is higher than 18 C No time limit constrain if indoor temperature is lower than 18 C and outdoor temperature is lower than 2 C During Hotkeep or Defrost mode indoor operation lamp will blink at interval of 3 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 In Ultra Lo 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 Ultra Lo mode 9 During Hot Dashed or outdoor temperature is lower than 5 C compressor rpm is WMAX2 10 During Hot Dashed when room temperature reaches set temperature SFTDSW compressor rpm is actual x DWNRATEW 22472 Reversing Valve Defrosting Heating Sleep Operation 15 or more Auto fresh defrosting Over defrosting inhibit period Ix 20sec Set to 7 hours Sleep key Fan speed Stop Start Stop Switch Set to Hi Operation lamp Defrost signal m Preheating judgment Lu Indoor fan Indoor fan Hi o Med See basic operation Ultra Lo Lo sleep See basic Hi Outdoor fan operation Outdoor fan
98. ep button ON Performs only fan operation at the Set speed regardless of the room temperature switch onic _ g 55 158 _Med Hi Enters sleep operation after set as on the left Action during sleep operation Lo sleep operation See page 49 Same as at left See page 51 See page 53 Same as at left See page 53 See page 55 Same as at left See page 57 Judging by room temperature and outdoor temperature Outdoor temperature 225 C or 21 C outdoor temperature lt 25 C room temperature gt 27 C restricted to cooling Outdoor temperature lt 18 C or 18 C outdoor temperature lt 21 C room temperature 323 C restricted to heating 21 C outdoor temperature lt 25 C room temperature 279 or 18 C outdoor temperature lt 21 C room temperature gt 23 C restricted to dehumidifying Room temperature C 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Outdoor temperature C Below setting temperature can be corrected by remote controller 3 C 27 C Cooling 23 C Heating Current room temperature Dehumidifying 25 C lt room temperature lt 27 C Same as at left Performs the sleep operation of each operation mode 39 Temperature set for cooling and dehumiditying value set by remote control Start stop switch Basic Cooling Oper
99. et room temperature cannot be achieved This appliance is not intended for use by young children or infirm persons unless they have been adequately supervised by a responsible person to ensure that they can use the appliance safely e Young children should be supervised to ensure that they do not play with the appliance NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT This controls the operation function and timer setting of the room air conditioner START STOP Button Press this button to start operation Press it again to stop operation FUNCTION Button Use this button to select the operating mode Every time you press it the mode will change from 6 AUTO to HEAT DEHUMIDIFY and to COOL cyclically SLEEP Button Use this button to set the sleep timer gt 16 Reserve Button Timer setting reservation OFF TIMER Button Select the turn OFF time ON TIMER Button Select the turn ON time Transmission Sign The transmission sign blinks when a signal has been send TEMPERATURE Button Room temperuture setting Value will change quicker when keep pressing FAN SPEED Button This determines the fan speed Every time you press this button the intensity of circulation will change from AUTO amp HI to MED to amp LOW to amp SILENT This button allows selecting the optimal or preferred fa
100. g sleep operation the set temperature when stopped as well as the time continue 3 The defrosting period is 12 minutes maximum to be counted 4 When operation is stopped during defrosting it is switched to auto refresh defrosting If the set time is changed during sleep operation all data including set temperature time etc is cleared and 5 Auto refresh defrosting cannot be engaged within 15 minutes after operation is started or defrosting is finished restarted If sleep operation is canceled by the cancel key or sleep key all data is cleared Setting Defrosting Inhibit Period Time cR M E ie DFTIM1 i 5 Outdoor temperature Notes 1 The time is set according to the outdoor temperature when it is between 0 C and 5 C 2 DFTIM is used when the outdoor temperature 2 0 C 3 DFTIM2 is used when the outdoor temperature S 5 C 49 REFRIGERATING CYCLE DIAGRAM MODEL RAD 50DH7A RAC 50DH7 RAD 60DH7A RAC 60DH7 COOLING DEHUMIDIFYING DEFROSTING OUTDOOR UNIT S TANK COMP REVERSING VALVE INDOOR UNIT
101. gate voltage to prevent excessive collector current from flowing to IC1 This SW power circuit uses a frequency as low 20 2 especially at a low load when both the indoor and outdoor units stop This reduces power loss in standby status lt Reference gt If the power circuit for P W B seems to be faulty 1 Make sure that 5V 12V 15V 17V and 5V on the control P W B power voltage are the specified values 2 When only the 5V output is low REG 1 regulator faulty 5V OV shorted output is too high or REG 1 is abnormal 3 When 12V and 5V are abnormal The following defects can be considered Fan operation power rush prevention relay shorting in relay etc 2 REG 1 regulator is abnormal etc Shorting on primary circuits When shorting occurs in the secondary circuits there is no abnormality in the primary circuits because of overcurrent protection The voltage rises when an opening occurs in the primary circuits or the feedback system is abnormal 4 When 15V and 17V power supply are abnormal D710 D713 or Drive circuit is abnormal 5 When all voltage are abnormal IC1 R716 may possibly be defective Also D cable may possibly be reverse connected If IC1 is abnormal be aware that other components such as the power module REG regulator etc are possibly defective When the switching power supply seems to be abnormal the voltage between IC1 pin 4 to be measured at the leads of R701
102. indicating troubled thermistors The correspondences between the number of blink time and troubled parts are shown as Table 10 3 Look in the table 10301 and LD302 blink for troubled parts and if the disconnections of them are checked out they are replaced If you can see two or more troubled thermistors a small number of blink takes precedence of others The electric expansions valve thermistor is put togrther with 3 pieces when replacing the thermistor replace one set of 3 pieces as taking care of positioning If you don t do so the unit may not operate normally and its cooling performance may drop Be ware that only an open circuit for OH thermistor has to be checked in 5 minutes after the compressor starts If the unit operates abnormally after replacing the thermistor replace the control P W B because it malfunctions S77 11 Electric expansion valve j LE G5 VALVE SELECT 1 CNIS WHT EN 12V RgO RU XA 6P 91 11 1900 ELECTRIC EXPANSION 2 4 d 65 VALVE SELECT 2 VALVE 3 Q 2 0902 1918 VALVE SELECT 2 6 0 i i C901 1 a 6 VALVE SELECT 3 QU nom se E oO 2 g S WA DODE 3 2 2 9 lt 49 8 2 lt E q 0 9 OT
103. ion When the room temperature is higher than the temperature setting The device will dehumidify the room reducing the room temperature to the preset level When the room temperature is lower than the temperature setting Dehumidifying will be performed at the temperature setting slightly lower than the current room temperature regardless of the temperature setting The function will stop the indoor unit will stop emitting air as soon as the room temperature becomes lower than the setting temperature 13 COOLING OPERATION Use the device for cooling when the outdoor temperature is 10 43 C If indoor humidity is very high 80 some dew may form on the air outlet grille of the indoor unit Press the FUNCTION selector so that the display indicates COOL Set the desired FAN SPEED with the FAN SPEED button the display indicates the setting A AUTO The FAN SPEED is HI at first and varies to MED automatically when the preset 2 temperature has been reached Economical as the room will become cool quickly MED Fan speed slow LOW Fan speed slower 6 HITACHI SILENT Fan speed ultra slower Set the desired room temperature with the TEMPERATURE 8 button display indicates the setting The temperature setting and the actual room temperature may vary so
104. ircuit Replace 801 Check outdoor electrical parts and repair any defective parts around the outdoor interface transmitting circuit Check outdoor electrical parts and repair any defective parts 15 Perform final operation check 89 3 Only indoor fan does not operate other is normal Yes Yes Can the fan be EP by The EM fan PWM Replace the microcomputer remote control ee output pin is Hi Replace the indoor fan motor Replace the microcomputer Perform final operation check 4 All systems stop from several seconds to several minutes 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 joint connector at indoor fan motor and set to the fan mode again see if shorting has occurred The operation The operation lamps lights once and goes out in 5 10 seconds once and goes out 5 10 seconds oan amo te ak acre in the P W B pattern 9 the indoor fan turned by hand SS add Check to see if the indoor fan is Switch of main power before check the chassis etc If it does repair Yes Replace the indoor fan motor 90 5 Check the main P W B power circuit Is 35V being output D701 701 b
105. is may cause short circuit can adhere on heat exchanger fin and blocked the evaporation water flow Do not use any aerosol or hair sprays near the indoor unit This chemical to drain pan The water will drop on tangential and cause water splashing us T out from indoor unit e 8 e Please switch off the unit and turn off the circuit breaker during cleaning the high speed fan inside the unit may cause danger e Turn off the circuit breaker if the unit is not to be operated for a long period 69 8 e Do not climb on the outdoor unit or put objects on it gt lt Do not put water container like vase the indoor unit to avoid water dripping into the unit Dripping water will damage the insulator inside the unit iii il and causes short circuit lt SI Do not place plants directly under the air flow as it is bad for the plants When operating the unit with the door and windows opened the room humidity is always above 80 and with the air deflector facing down or moving automatically for a long period of time water will condense on the air deflector and drips down occasionally This will wet your furniture Therefore do not operate under such condition for a long time f the amount of heat the room is above the cooling or heating capability of the unit for example more people entering the room using heating equipments and etc the pres
106. me how depending on conditions Press the START STOP button Cooling operation starts with a beep Press the button again to stop operation The START function does not start if the temperature setting is higher than the current room temperature even though the 9 OPERATION lamp lights The cooling function will start as 9 soon as you set the temperature below the current room temperature As the settings are stored in memory in the remote controller you only have to press the 0 START STOP button next time 14 TIMER RESERVATION ON Timer and OFF Timer are available OFF TIME setting Select the OFF TIME by pressing the OFF Button Setting time will change according to the below sequence when you press the button 0 5 hour interval 1 hour interval 0 5 41 01 52 9 5 10 711712 The value change quicker if you keep pressing the button Press the 1 Reserve button OFF TIMER reserved with a signal received sound 0 OFF Mark starts lighting instead of blinking ON TIME setting Select the ON TIMER by pressing the ON Button At the beginning of setting time hours was set Setting time will change according to the below sequence 0 5 hour interval 1 hour interval Te 0 5 11
107. n speed for each operation mode CANCEL Button Cancel timer reservation Precautions for Use Do not put the remote controller in the following places e Under direct sunlight e n the vicinity of a heater e Handle the remote controller carefully Do not drop it on the floor and protect it from water the outdoor unit stops it will not restart for about minutes unless you turn the power switch off and on or unplug the power cord and plug it in again This is to protect the device and does not indicate a failure f you press the FUNCTION selector button during operation the device may stop for about 3 minutes for protection 10 VARIOUS FUNCTIONS HL Auto Restart Control lf there is a power failure operation will be automatically restarted when the power is resumed with previous operation mode As the operation is not stopped by remote controller If you intend not to continue the operation when the power is resumed switch off the power supply When you switch on the circuit breaker the operation will be automatically restarted with previous operation mode Note 1 If you do not require Auto Restart Control please consult your sales agent or OFF by remote control 2 Auto Restart Control is not available when Timer or Sleep Timer mode is set AUTOMATIC OPERATION The device will automatically determine the mode of operation HEAT COOL or DEHUMID
108. ndows 27 Effective Usage Of Timer At night please use the OFF or ON timer operation mode together with your wake up time in the morning This will enable you to enjoy a comfortable room temperature Please use the timer effectively Please Adjust Suitable Temperature For Baby And Children Please pay attention to the room temperature and air flow direction when operating the unit for baby children and old folks who have difficulty in movement FOR USER S INFORMATION The Air Conditioner And The Heat Source The Room Caution If the amount of heat in the room is above the cooling capability of the air conditioner for example more people entering the room using heating equipments and etc the preset room temperature cannot be achieved Not Operating For Long Time When the indoor unit is not to be used for a long ge period of time please switch off the power from the 4 mains If power from mains remains the indoor unit still consumes about 8W the operation gt control circuit even if it is in OFF mode A When Lightning Occurs Warning To protect the whole unit during lightning please A stop operating the unit and remove the plug from the socket 55 Interference From Electrical Products A Caution spe To avoid
109. ng room D as well as to make more effective use of electricity I 2 At intervals the doors and windows should be opened to let fresh air in A CAUTION sure the room is ventilated when operating the air conditioner at the same time as other heating appliances 3 Using the timer is recommended before going to sleep or going out 4 The following must never be used for cleaning the indoor and outdoor units Benzine thinner and scrub can damage plastic surfaces or coating Hot water above 40 C can shrink the filter and deform plastic parts 5 Do not block the air intake and air outlet Do not block the air outlets and intakes of the indoor and outdoor units with curtains or other obstacles which could degrade air conditioner performance and cause unit failure 18 THE IDEAL WAYS OF OPERATION Suitable Room Temperature A Warning Freezing temperature is bad for health and a waste of electric power 7 A Caution Do not close the room for a long period of time Occasionally open the door and windows to allow the entrance of fresh air P K A Dusty air filter will reduce the air volume and the cooling efficiency To prevent from wasting electric energy please clean the filter every 2 weeks 19 Install curtain or blinds It is possible to reduce heat entering the room through wi
110. not to have the test probes of the measuring instrument shortcircuit a load circuit or the like A CAUTION 1 In quiet or stopping operation slight flowing noise of refrigerant in the refrigerating cycle is heard occasionally but this noise is not abnormal for the operation 2 When it thunders near by it is recommended to stop the operation and to disconnect the power cord plug from the power outlet for safety 3 n the event of power failure the airconditioner will restart automatically in the previously selected mode once the power is restored In the event of power failure during TIMER operation the timer will be reset and the unit will begin or stop operating under a new timer setting 4 the room air conditioner is stopped by adjusting thermostat 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 50 F 6 This room air conditioner the reverse cycle should not be used when the outside temperature is below 15 5 F If the reverse cycle is used under this condition the outside heat exchanger is frost
111. pplied from the outdoor unit to perform communications between indoor and outdoor units This circuit consists of a transmiting circuit which superimposes an interface signal transmit from the microcomputer on the DC 35V line and a transmiting circuit which detects the interface signal on the DC 35V line and outputs it to the microcomputer e Communications are performed by mutually transmiting and receiving the 4 frame outdoor request signal one frame of which consists of a leader of approx 100 ms start bit 8 bit data and stop bit and the command signal with the same format transmit from the indoor unit e From outdoor microcomputer to indoor microcomputer The request signal output from microcomputer pin 3 2 9 is input to the transmitting circuit The transmitting circuit modulates this signal by approx 38kHz high frequency This high frequency signal is amplified by a transistor superimposed on the DC 35V line via C801 or C811 C821 and 1801 1802 L803 and supplied to the indoor unit To prevent erroneous reception the outdoor microcomputer is designed so that it cannot receive a signal while is is outputting a request signal The receiving circuit in the indoor unit consists of a comparator and transistor The interface signal from the outdoor unit on the DC 35V line is supplied to C821 where DC components are eliminated and is then shaped by the comparator The shaped signal is detected by diode amplified by amp and supplie
112. r Changes from Hi to Med or Lo depending on room Start stop switch Reserve switch Cancel switch Operation lamp Timer lamp Timer memory Off gt On timer Changes between Lo and Med depending on the room temperature On gt Off timer On gt Off timer during operation Off gt On timer during stop Set to ultra Lo Lo Med 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 temperature Temperature division Fan speed ultra Lo mode other than during preheating cooling is recovered at 18 33 Auto Division 1 Lo When the compressor is running at maximum speed In modes other than Tigers set Division 2 Lo during hot dash or when recovered from defrosting left Division 3 4888 3 HERE 37 66 Division 4 32 29 66 Compressor stopped 1 The indoor fan also stops when the forcibly for 3 minutes compressor is in stop status Hi or ultra HI m fan speed set 1 Runs at Hi until first thermo to 2 off after operation is started Med 5 2 Runs Lo when thermo is Lo 5 off 8 Hi Operates regardless the Set to ultra Hi when the Set to Hi in modes other than when the Set to ultra Lo Lo Med
113. ructions that must be followed Please keep this manual after reading PRECAUTIONS DURING INSTALLATION Do not reconstruct the unit Water leakage fault short circuit or fire may occur if you reconstruct the unit by yourself Please ask your sales agent or qualified technician for the installation of your unit Water leakage short circuit or fire may occur if you install the unit WARNING by yourself Please use earth line Do not place the earth line near water or gas pipes lightning conductor or the earth line of telephone Improper installation of earth line may cause electric shock e A circuit breaker should be installed depending on the mounting site of the A unit Without a circuit breaker the danger of electric shock exists e Do not install near location where there is flammable gas The outdoor unit CAUTION may catch fire if flammable gas leaks around it e Please ensure smooth flow of water when installing the drain hose Should abnormal situation arises like burning smell please stop operating the unit and turn off the circuit breaker Contact your agent Fault short circuit or fire may occur if you continue to operate the unit under abnormal situation e Please contact your agent for maintenance Improper self maintenance may cause electric shock and fire Please contact your agent if you need to remove and reinstall the unit Electric shock or fire may occur if
114. s defrosted At the beginning of heating the fan speed remains LOW for 30 seconds If HIGH is selected it switches to LOW and again to MED after additional 30 seconds If temperature is high in the outdoor heating operation may stop to protect internal devices 80 AUTO FRESH DEFROSTING After the ON OFF button is pressed Auto Fresh Defrosting is carried out the to stop heating the outdoor unit is system checks the outdoor heat exchanger still working with the OPERATION and defrosts it as necessary before stopping lamp lighting operation Fan speed does not change when fan speed selector is changed At this point fan speed is automatic during auto operation 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 When on timer has been programmed operation starts before the preset time has been reached Does Nice temperature reservation It does not work It works only during cooling function operate during dehumidifying 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 Even if the same time is preset the operation star
115. spt 9 4035 1 5 C R620 _ 1 5 114 C 8074 5 1 1 _ C D 4 ey em VI 3P 4045 1 5 1 10 C 621 10 5 1 1 C 810 680 5 1 0 C T NE L801 0v 641 10 5 1 1 C 811 2 5 1 C 4 85 00 1 1 419 475 1 6 RECEIVERIR6 4 2 10 5 1 10 C 812 39 5 1 8 C Ol 1 10 i 35 VARS 3 Smm E 643 1065 1 10 C 813 39 5 1 8 C 02 5 1 10 C EN DRAIN PUMP 500 10 5 1 10 644 10 5 110 821 15 C 03 2 RN zE MOTOR 501 5 1 646 1 5 1 1 C 822 1 C 04 UE 5V 4 1 0V ov z 647 1850 1 1 C 823 C 52 c m 510 10 5 11 4 C 651 1850 1 1 8248 25 1 1 10 06 5 1 6 R511 5 1 10 C 8654 10059 1 19 C 825 10 19 1 C 07 620 5 C R512 10 5 10 C 656 3905 18 C 826 1 59 1 1 C 08 c MIO 513 10 5 1 1 651 10 59 1 10 C 827 _3 5 C 09 5 1 10 E 515 10 5 C 658 10K 5 1 10 828 10 5 1 0 C 10 6201561 C 2 51615 1 59 11 4 660 5 1 10 82915 1K 5 1 2 5 07 CAPACITOR 12 560 5 1 19 C LAT E a F TIPE FORI SM TYPE SE F V TIPE ET VITE ov
116. t time varies Has the clock been set Timer cannot be set unless the clock has been set The current time display The current time disappears When the current time is disappears soon in approx 10 seconds The set the display flashes for time set display has priority approx 3 minutes The timer has been programmed Is the current time past the preset time but the preset time disappears When the preset time reaches the current time it disappears spi The indoor fan varies among high air flow low air flow and breeze in the auto fan speed mode Heating operation Loud noise from the outdoor unit is heard when operation is started Noise from the outdoor unit occasionally changes There is a difference between the set temperature and room temperature Air does not flow immediately after operation is started 82 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 speed mode When the temperature is low the fan speed varies among high air flow low air flow and breeze 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 The compressor rotation speed changes according to the difference between the thermostat set temperature and room temperature
117. tart stop button Remove the outdoor unit cover and electrical parts cover and check self diagnosis lamp LD301 E d Self diagnosis lamps LD303 302 301 Does LD301 blink one time Repeats 0 25 second on and 2 second off 1 Check the room temperature thermistor if it is defective replace it lt Normal values gt 10 C approx 20k2 25 C approx 10kQ 30 C approx 8kQ Check the heat exchanger thermistor if it is defective replace it lt Normal values gt 10 gt approx 20 25 C approx 10kQ 30 C approx 8 Yes Does outdoor electrical part LD301 blink nine times Is the indoor outdoor unit communication signal superimposed on 35V DC of connection wires C and D 38kHz Approx 2Vp p Approx d 35V ov Is the indoor transmitting signal being generated at Q801 s collector 38kHz Approx 2Vp p Transmission waveform Approx y 35V ov Yes Yes Does LD303 switch off several second after it lights Check outdoor electrical parts and repair any defective parts around the outdoor interface transmitting circuit Check the indoor interface transmitting c
118. to create a DC voltage The voltage becomes 260 360V when the compressor is operated Reference 1 Active module The active filter consisting of a reactor and switching element eliminates higher harmonic components contained in the current generated when the compressor is operated and improves the power factor Diode stacks These rectify the 220 240V AC from terminals L and N to a DC power supply 2364 In case of malfunction or defective connection Immediately after the compressor starts it may stop due to abnormally low speed active error etc The compressor may continue to operate normally but the power factor will decrease the operation current will increase and the overcurrent breaker of the household power board will probably activate In case of active module faulty or defective connection Although the compressor continues to operate normally the power factor will decrease the operation current will increase and the overcurrent breaker of the household power board will probably activate lt Reference gt If diode stack 1 is faulty the compressor may stop due to Ip anbormally low speed etc immediately after it starts or it may not operate at all because no DC voltage is generated between the positive and negative terminals If diode stack 1 is faulty be aware that the 25A fuse might also have blown If diode stack 2 is faulty DC voltage may not be generated
119. tty Drain pipe Must be installed separately Insulate indoor part of pipe to prevent condensation The difference in height between the indoor and outdoor unit should be kept below 20m The connecting pipe no matter big or small should Maximum pipe length 30m Minimum pipe length 5m all be insulated with insulation pipe and then wrapped with vinyl tape insulator will deteriorate if it is not wrapped with tape 3 above 100mm give clearance as wide as possible quias above 200mm 50mm installed on the of balcon 7 N CAUTION Always install the indoor unit level Units not installed level may leak j vos above 100mm an N 2 CAUTION x Discharge grille and suction grille shall be cover by insulation above 200mm material to prevent water drop NAMES AND FUNCTIONS OF EACH PART INDOOR UNIT FULL DUCT Suction grille SEMI DUCT NON DUCT Air deflector Remote controller Discharge grille Discharge grille OUTDOOR UNIT DRAIN PIPE Condensed water drain to outside CONNECTING CORD AIR INLET BACK LEFT SIDE AIR OUTLET MODEL NAME AND DIMENSIONS MODEL WIDTH mm HEIGHT mm DEPTH mm b RAD 50
120. ture measuring points are shown as Table 10 1 V CN5 THERMISTOR 01 CN6 2 6 DEF THERMISTOR 91 THERMISTOR 9900 TEMP CNT OUTDOOR THERMISTOR Ort 0v EF MICROCOMPUTER La S 8 aye SPTHERMISTOR IN D ADS2 ADS 050 2 320 sss 1 m Q3MULTIPLEXER 6 2 E ELTE Fig 10 1 Temperature Detection Circuit S75 Table 10 1 Name and Role of each thermistor Connector No Measuring Point Role OH thermistor 5 Compressor head If the temperature of the compressor rises abnormally 118 C the compressor will be stopped The temperature is used to decide the operation of the valve DEF thermistor Heat exchanger The thermistors decide the defrost operation during heating combined the data of the outside temperature and its data Outdoor temperature thermistor Outside temperature Outdoor temperature is used to decide the various operations of the air conditioner Electric expansion valve thermistor NARROW PIPE Indoor unit NARROW PIPE Electric expansion valve thermistor WIDE PIPE e Table 10 2 shows the
121. valve faulty 1 7 2 7 ow 2 Disconnection in heat exchange thermistor only during heating Outdoor unit forced operation Service SW in outdoor electrical parts 2 i BE The outdoor unit is forced operation or turned ON undergoing balancing after forced operation Indoor outdoor interface faulty 1 Indoor interface circuit 3 Be sec 3 times The interface signal from the outdoor unit has 2 Outdoor interface circuit been interrupted Outdoor electrical assembly defective Please check at the outdoor electrical __ led lamp blinking 10301 and refer to 4 4 times self diagnosis lighting mode for outdoor unit Abnormal water level detection 1 Drain stopped up 5 226 times All stop when the float switch has been activated 2 Drain pump 3 Float switch Drain pump forced operation 1 Indoor PW B Main 6 i i 2 sec 7 times When the knob of drain pump test switch at Indoor main slide to test position Room thermistor or heat exchanger 1 Room thermistor 7 thermistor is faulty 2 Heat exchanger thermistor i i 9 times When room thermistor or heat exchanger thermistor is opened circuit or short circuit DC fan motor overcurrent detection 1 Indoor fan locked 8 i i 2 sec 10 times Overcurrent in indoor DC fan motor has been 2 Indoor fan motor detected 3 Indoor P W B Main 1 401 data reading fault 1
122. waveform at each point e When power is supplied Ut U7 because of that Ut is chopped current flows as shown below 1 When Ut transistor is U transistor U coil coil transistor DC current detection resistor Point 8 Fig 3 1 2 When U transistor is OFF by inductance of motor coil U coil coil transistor Return diode Point Fig 3 4 n87 DC compressor motor DC current Id detection resistor Fig 3 4 System Power module circuit U is OFF V is ON e Since current flows at point B only when U transistor and transistor is ON the current waveform at point becomes intermittent waveform as shown in Fig 3 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 14 detection resistor Reference If power module is detective self diagnosis lamps on the control P W B may indicate as shown below SMOOTHING CAPACITORS MAIN P W B SERVICE SWITCH Table 3 1 Self diagnosis lamp Self diagnosis and mode Blinks 2 times Ip peak current cut LD301 Abnormal low speed Blinks 3 rotation LD301 times Blinks
123. you remove and reinstall the unit yourself improperly e If the supply cord is damaged it must be replaced by the special cord obtainable at authorized service parts centers PRECAUTIONS DURING OPERATION e Avoid an extended period of direct air flow for your health e Do not insert a finger a rod or other objects into the air outlet or inlet As the fan is rotating at a high speed it will cause injury Before cleaning be sure to stop the operation and turn the breaker OFF e Do not use any conductor as fuse wire this could cause fatal accident 0 gt gt e F During thunder storm disconnect and turn off the circuit breaker PRECAUTIONS DURING OPERATION The product shall be operated under the manufacturer specification and not for any other intended use e Do not attempt to operate the unit with wet hands this could cause fatal accident 2702 When operating the unit with burning equipments regularly ventilate the room to avoid oxygen insufficiency Do not direct the cool air coming out from the air conditioner panel to face household heating apparatus as this may affect the working of apparatus such as the electric kettle oven etc e Please ensure that outdoor mounting frame is always stable firm and without defect If not the outdoor unit may collapse and cause danger e Do not splash or direct water to the body of the unit when cleaning it as th

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