SERVICE Manual
Contents
1. CN72 i 396 08 RED 0 BLOCK fetes C701 6702 vari l I 250V 1 6A I TOUR TID 4A 18400744 pios 1601 R201 I 0101 0103 14007 ony 100 1602 1503 ik J c Y i AC INPUT gt 7812 4 zT 0102 X A nio 2 Y P C102 LSA05230P 1600uF T 1047 25005 T fos 1 2904 Sa 230v 50H 77 35v 25 25V L 2 23mH 500mA 73 7 4 WAY l 1 1 04 1604 OUT SEAN 12 3 vee T I P7I INTI C501 I I T 1047 I OUT GND DOOR UNIT 21 t ut 571 20 1 MB202PL avr 1 Avec 1007 0502 1 1065003 1042 6 R910 w 3K J 1 83 59 P36 CN73 out 2 n2 58 27 2 1W396 05AV WHT w2. 14 Parts List No CODE NO Description Specification s Remark AQ24A2QC AQ18A2QC 1 DB64 10173A GRILLE AIR INLET HIPS 1 1 2 DB64 70108A PANEL CENTER DISPLAY PC 1 1 3 DB63 30150A GUARD AIR FILTER PP 2 2 4 DB74 10101A CLEANER FILTER ASS Y ASS Y 1 1 4 1 DB61 10164C CASE CLEANER FILTER PP 2 2 4 2 DB74 10082B CARBON FILTER POLYESTER CARBON 1 1 4 3 DB74 10081A CLEANER FILTER POLY ESTER COTTON 1 1 5 DB63 10466A COVER TERM INAL ABS V0 1 1 6 DB92 70095C ASS Y FRONT PANEL HIPS 1 1 7 DB93 10599C ASS Y PCB DISPLAY AS24A1QE B 1 1 8 DB94 10083H ASS Y TRAY DRAIN ASS Y 1 1 8 1 DB31 10153B ASS Y STEPING M OTOR M SFCC20A03 1 1 8 2 DB66 30181A BLADE H HIPS 1 1 9 DB75 40087G ASS Y EVAP 2 5 8 1 DB75 40087H ASS Y EVAP SLiT1 5 1 2 1 10 DB67 00058A SPACER EVAP PVC 1 1 11 DB90 40162E ASS Y HOLDER MOTOR ASS Y 1 1 11 1 DB61 40264A HOLDER MOTOR PP Vo 1 1 11 2 DB65 10108A CLIP EARTH WIRE SECC 1 1 11 3 DB65 40063A TERM INAL BLOCK ASS Y 5P 25A 1 1 12 DB31 10151B M OTOR FAN IN IC 9430SKF6A 1 1 13 DB94 30162A ASS Y C F FAN 895 xL 1 1 14 DB90 40135B 55 HOLDER BEARING ASS Y 1 1 14 1 DB94 40003A
3. 5 Loosen the two fixing screws of left side 6 Lifting the heat exchanger up a little to push the up side for separation from the indoor unit Parts Procedure Remark Fan otor and Cross Fan 1 Do cal un 3 A above 2 Loosen the fixing three screws and separate the motor holder 3 Loosen the fixing screw of fan motor By use of M3 wrench 4 Separate the fan motor from the fan 5 Separate the fan from the left holder bearing 2 2 Outdoor Unit No Parts Procedure Remark 1 Cabinet 1 Turn off the unit and remove the power cable 2 Remove the top cover 3 Remove the control box cover 4 Unplug the ass y cable 5 Remove the cabi side 6 Remove the cabi front When you assemble the parts check if the each parts and electric connectors are fixed firmly 2 Fan Motor amp 1 Do Procedure 1 above Propeller Fan 2 Remove the nut flange Turn to the right to remove as it is a left turned screw 3 Disassemble the propeller fan 3 Troubleshooting 3 1 Items to be checked first 1 Is the voltage of the power correct The input voltage shall be the rating voltage 10 The airconditioner may not operate properly if the voltage is out of this range Is the link cable linking the indoor unit and the outdoor unit linked properly The indoor unit and the outdoor unit shall
4. E SIUE s J 250 Parts List No CODE NO Description Specification Specification 1 F701 DE32 10037A FUSE FST 250V 3 15A 2 F701 F101 DE47 40024A HOLDER FUSE FH 51H 7 5A 3 01 DE13 20008A IC VOLT REGU KA7812A 4 DE62 30032A HEAT SINK AL H25 5 1601 DE60 10100A SCREW PH M 3 6 FeFzY 6 1602 DE13 10016A IC VOLT REGU KA7805A 7 71 C FILM CQS 450V 1 2uF 8 FILTER NOISE LSAO5230P 250V 2A 23mH 2 9 R903 904 905 906 2001 000776 R CARBON RD 1 2 T S 621 10 R203 2001 000588 R CARBON RD 1 4 TP 332 J 11 R202 301 409 501 509 513 519 525 601 604 606 902 2001 000065 R CARBON RD 1 4 TP 103 J 12 R405 407 2001 000036 R CARBON RD 1 4 TP 331 13 R201 204 405 401 402 404 603 606 608 2001 000042 R CARBON RD 1 4 TP 102 14 R607 2001 000855 R CARBON RD 1 4 TP 560 15 R602 2001 001088 R CARBON RD 1 2 T S 102 16 R403 2001 000890 R CARBON RD 1 4 TP 682 17 R910 912 913 A1000 0244 R CARBON RD 1 8 TP 332 18 R406 408 2004 001137 R M ETAL FILM RD 1 4 TP 682 F 19 D101 105 0402 000137 DIODE RECT 1N4007 20 19511 B4190 0016 THYRISTOR G3M B 202PL 21 BZ61 DE30 20016A BUZZER CBE 2220BA STICK 22 C202 402 2202 000783 C CERAM IC CA OA 50 1037 23 C301 401 2202 000796 C CERAM IC CA OA 50V 1027 24 C102 104 201 203 403 404 501 502 902 2202 000780 C CERAM IC CA OA 50V 1047 25 C103 2401 000710 C ELEC CE04 25V 222 M 26 C105 2401 001397 C ELEC CE 04 25V 471 M 27 C101 2401 000180 C ELE
5. umm ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT AQ24A2QC UQ24A2QC AQ18A2QC UQ18A2QC S ERVICE Manual AIR CONDITIONER CONTENTS 1 Installation 2 Disassembly and Reassembly 3 Troubleshooting 4 Exploded Views and Parts List 5 Refrigerating Cycle Block Diagrams 6 Wiring Diagrams i a i 7 Schematic Diagrams DB68 00276A 5 1 Installation 1 1 Refrigerant Refill Procedure Refill an air conditioner with refrigerant when refrigerant has been leaked at installing or using 1 Purge air for new installation only Turn the 3 way valve clockwise to close connect the pressure gauge low pressure side to the service valve and open the 3 way valve again Connect the tank to refill with Refrigerant Set the unit to cool operation mode Check the pressure indicated by the pressure gauge low pressure side Standard pressure is should be 4 5 5 5kg cm in a reqular high operation mode Open the refrigerant tank and fill with refrigerant until the rated pressure is reached It is recommended not to pour the refrigerant in too quickly but gradually while operating a pressure valve Stop operation of the air conditioner Close the 3 way valve disconnect the pressure gauge and open the 3 way valve again 9
6. 2 Is the set temperature of the remote control higher than room temperature in COOL mode 3 Is the set temperature of the remote control lower than room temperature in HEAT mode 4 Is the POWER IN connector CN78 linked correctly 5 Is the outdoor unit properly connected with the TERMINAL BLOCK connector 7P 2 Troubleshooting procedure After unplugging out the power cord should be reconnected within five seconds Y i i o Check as in the dure procedure No Power parts Does the operating lamp blink Refer to page 5 2 YES CB should be checked YES PCB should be checked Room temperature sensor is Does the timer lamp blink during operation Room temperature sensor should be checked out of order NO 1 I 2 Is the power relay 71 operated by adjusting the room 15 temperature 3 out of order Test rod location Normal Condition Voltage rd IC1 Pin No 63 GND RY73 ON DC 4 8V NO Is the rating voltage 10 range applied relay between CN78 NO Power relay is Power relay should be NO 1 AND 3 out of order replaced n Outd it i utdoor unit is D MEN Is the room sensor normal register 25 10KQ 10 20 30 17 96k Q 12 09k Q 83k Q 10 3 2 4 When the UP DOWN Louver
7. 4 way valve should be replaced or Connecting Cable Check Normal Abnormal M icom 2 Abnormal IC07 Abnormal RY73 PCB should be replaced JI 11 3 2 6 If Operation By Remote Control Unit Is Impossible Initial Diagnosis 1 Troubleshooting procedure Remove power cord and plug in again approx 5 Seconds Is operation lamp blinking IY Check as in the procedure NO Power parts Refer to page 5 2 JJ sound heard from the indoor unit when ON OFF button on the remote control unit pushed Normal N Y Voltage of battery less than 2 5V Remote Control Unit Replace battery N Y LCD display status of REM OCON normal LCD is faulty Y Y Transmission display lamp blinking when Replace button ON OFF button on the remote control unit pushed Y Y Voltage at PIN 30 of Remocon M icom change Micom is faulty Y Y Voltage at collecter of Q601 or Q602 change Q601 C4375Y or Q602 C1623Y is faulty ii IR LED CL 1L5EU is faulty Y Voltage at pin 26 of micom IC04 change INDOOR UNIT Receiver module is faulty Y Y M icom 1604 is faulty 12 4 Exploded Views and Parts List 4 1 Indoor Unit 14 2
8. on the display panel NO Display Self Diagnosis Operating LED blinking 1Hz Restore from power failure input initial power TIM ER LED blinking 1Hz Indoor unit Room sensor Error open or short OPERATING and TIM ER LED blinking 1Hz Indoor unit heat exchanger temperature sensor Error open or short WIN FAN LED blinking 1Hz Indoor fan malfunctioning for spead is Below 380rpm 3 2 Fault Diagnosis by Symptom 3 2 1 No Power completely dead Initial diagnosis 1 Checklist 1 Is input voltage normal rating voltage 10 range 3 4 2 Troubleshooting procedure 2 Is AC power linked correctly Are connections between primary side secondary side of the power transformer and PCB good Is output voltage of DC regulator IC KA7812 IC01 normal 11VDC 12 5VDC 5 Is output voltage of DC regulator IC KA7805 1 02 normal 4 5VDC 5 5VDC Remove power cord and plug in again approx 5 seconds 15 operation lamp blinking Y YES YES Is DC voltage of PCB Does operation start when i run stop button on the remote display normal conte unit pushed y NO NO Is the rating voltage 10 Is transmission EU of the remote Replace PCB range applied to the controller unit blinking display primary side of the power transformer y YES Is bee
9. Close the cap of each valve Compound gauge For mounting other and of hose when not in use p N 1 f Y 7 Suspension hook High pressure gauge V Hand po wheel E Finger tight fittings Connected to high pressure side Charging line CeS 1 2 Pump down Procedure Pump down shall be carried out when an evaporator is replaced or when the unit is relocated in another area l Remove the caps from the 2 way valve and the 3 way valve 2 Turn the 3 way valve clockwise to close and connect a pressure gauge low pressure side to the service valve and open the 3 way valve again Y 2 Way Valve 3 Setthe unit to cool operation mode Check if the compressor is operating Y 4 Turn the 2 way valve clockwise to close Y 3 Way Valve 5 When the pressure gauge indicates 0 turn the 3 way valve clockwise to close Y 6 Stop operation of the air conditioner Y 7 Close the cap of each valve 2 Disassembly and Reassembly Stop operation of the air conditioner and remove the power cable before repairing the unit 2 1 Indoor Unit No Parts Procedure Remark 1 Front Grille 1 Stop the air conditioner operation and block the main power 2 Seperate tape of front panel upper 3 Contract
10. ASS Y M OTOR B K SGCC M 1 7 DB94 50039A PARTITION SGCC M 1 8 DB75 30102E ASS Y CON DENSER ASS Y 1 9 DB90 40176B COVER CONTROL ABS V5 1 10 DB64 60160B CABI SIDE OUT 5C 90073T 1 11 DB90 10616A TOP COVER 5C 90073T 1 12 DB95 10339C COM PRESSOR H25B26QABCA 1 13 DB99 10149B ASS Y AW AY V V ASS Y 1 13 1 DB62 40055F PACKED V V5 8 20LT M IN 1 13 2 DB62 40036A AWAY V V CHV 0201 1 14 DB99 10138E ASS Y CHECK V V ASS Y 1 14 1 DB62 31798E TUBE CAPI C C1220T 0 1 14 2 DB62 40039C PACKED V V 1 4 1 4 INCH 1 14 3 DB62 31802B TUBE CAPI H 12207 0 1 15 DB93 40735D ASS Y CONTROL OUT ASS Y 1 15 1 DB34 90054B SWITCH MAGNET 41NB21AL 1 15 2 2501 001152 CAPACITOR DUAL 3 0 35uFx450VAC 1 15 3 DB65 40022D TERM INAL BLOCK 7P 1 15 4 DB95 90026B SPARK KILLER i 15 5 3601 000236 FUSE 2A 250V 1 16 DB72 50615A CLOTH SOUND COMP 1 17 DB72 50614A CLOTH SOUND UP 1 18 1 DB93 00113A CONNECTOR WIRE 5P 1 18 2 DB67 20011A DRAIN PLUG OUT PP 1 18 3 DB60 30010A NUT FLANGE 1 4 C3771BD 1 18 4 DB60 30010D NUT FLANGE 5 8 C3771BD 1 19 4 3 PCB Box Parts List Q TY No CODE NO Description Specification Remark AQ24A2QC AQ18A2QC 1 DB61 10151A CASE CONTROL PP 1 1 2 DB93 10545C ASS Y MAIN PCB PD Q24B1Q 02 1 DB93 10555C ASS Y MAIN PCB PD Q24B1Q 05 1 3 DB32 10008E ASS Y THERMISTOR 103AT 1 1 4 DB93 10599B ASS Y PCB DISPLAY ASS Y edge 1 1 5 DB26 10065B TRANSFORM ER AC230V DC17 1 1 20 5 Refri
11. Motor Does Not Operate Initial Diagnosis 1 Checklist 1 Is input voltage normal rating voltage 10 range 2 Is the UP DOWN louver motor properly connected with the connector CN61 2 Troubleshooting procedure Remove power cord and plug in again in approx 5 seconds 15 operating lamp blinking Does operation start when swing button of the remote control unit pushed N Voltage at pin 433 436 of micom ICO4 change S quarew ave n Volatge at pin 10 11 12 13 of IC05 KID65003 change Squarewave ly UP DOWN louver motor is faulty Check as in the procedure No Power parts Refer to page 5 2 Normal M icom IC04 is faulty Driver IC05 KID65003 is faulty Y 3 2 5 In the mode When there is no warm air current Check this first 1 Is the set temperature of Remote Control lower than room temperature in Heat mode 2 Is the Indoor PCB properly connected with the CN71 and CN78 connector After training on the heating operation should start in five minutes YES Y NO 0 Is the munber 48 of M icom IC04 DC 4 8 V Y YES Is the munber 12 of IC07 KID65003 LOW Y YES Is the voltage between CN 71 1 and RY78 1 the 0 rating voltage 10 range YES Y Abnormal 4way valve of Outdoor Unit or connecting Cable
12. normal MND YES OK Replace IN4007 3 2 2 When the Indoor Unit Fan Does Not Operate Initial Diagnosis 1 Checklist 1 Is the indoor unit fan motor properly connected with the connector CN73 2 Is the AC voltage correct 3 Is HALL IC in indoor fan motor properly connected with the connector CN43 4 Is the running capacitor properly connected with the solder part of the PCB 2 Troubleshooting procedure After unplugging out the power cord should be reconnected within five seconds YES Does the operating lamp Green blink YES Does the Solid State Relay SS71 work properly Test rod location Normal Voltage 5571 5571 129 YES Is the supply voltage of the fan motor sufficient Test rod location Normal voltage PCB CN73 Condition pin3 pind Fan operate 180V NO Check as in the procedur NO power parts Refer tp 8 gt Microcomputer is out of order PCB is out of order PCB should be replaced MF C is out of order Replace Fan motor is out of order Fan motor should be replaced 3 2 3 When the Outdoor Unit Does Not Operate Initial Diagnosis 1 Checklist 1 Is input voltage normal rating voltage 10 range
13. 4 4 WAY VALVE 5 0UT FAN STEPPING MOTOR 24 7 2 Outdoor Unit UQ18A2QC UQ24A20C DIAGRAM OUTDOOR NFB OUTDOOR UNIT INDOOR UNIT 182 oN RED sane SOL mm H GREEN 5 MEL EARTH WHT O L P RED COMPRESSOR WHT MARK NAME MARK NAME 52C MAGNETIC CONTACTOR 1 2 TERM INAL BLOCK 205 SOLENOID COIL FM 1 FAN MOTOR F FUSE 2A 250V 5 SPARK KILLER CAPACITOR 2 5 40M F X 450VAC DIAGRAM OUTDOOR L SOURCE 5 1 OUTDOOR UNIT INDOOR UNIT EARTH N F B TBI i N POWER 6 GREEN YEL 82 x gt So GREEN YEL 529 E EARTH COMPRESSOR MARK NAME MARK NAME 52C M AGNETIC CONTACTOR TB12 TERM INAL BLOCK 205 SOLENOID COIL CH CRANK CASE HEATER 1 CAPACITOR FM1 FAN MOTOR F FUSE 2A 250V 5 SPARK KILLER CAPACITOR 3 0 35M F X 450VAC 25 amp Scherratic Diagrans 8 1 Indoor Unit lt I 1 1 1 1 I I I I I I I 1 1 I 1 I E
14. C CE 04 35V 102 M 28 C601 2401 001573 C ELEC 47 50V 29 1C04 0 09 10149 IC M CU M B89635R 466 30 IC03 DE13 20009A IC 75337 31 X501 2802 000103 RSONATOR CERAM IC 10M Hz 32 1C05 1C06 1C07 DE13 20024A IC DRIVE KID65003AP 33 Q201 401 601 602 A4050 0168 TR GENERAL KSC945Y 34 10603 0501 000292 TRANSISTOR AT08Y 35 0902 0901 0504 000144 TRANSISTOR R2002 36 SW91 3404 001013 SWITCH TACT KPT 1115V 37 CN73 3711 000262 CONNECTOR WAFER YW 396 05AV WHT 38 CN43 3711 000879 CONNECTOR WAFER SM W 250 03 BLU 39 CN41 3711 000940 CONNECTOR WAFER SM W 250 04 WHT 40 CN61 3711 001038 CONNECTOR WAFER SM W 250 06 WHT 41 CN62 3711 001036 CONNECTOR WAFER SM W 250 06 BLUE 42 CN71 CONNECTOR WAFER YW 396 03AV BLK 43 CN92 3711 001154 CONNECTOR WAFER SM W 250 09 WHT 44 RY72 RY72 RY71 B3068 0092 RELAY J Qla 12V 45 14 35 HRO1 HR04 01 1 04 DE39 60001A WIRE SO COPER PI0 6 SN T 52MM OPJ 1 2 OP 3 46 CN72 CONNECTOR WAFER YW 396 03AV WHT 47 CN11 SM W 250 03 RED 48 F101 DB47 90053A FUSE FST 250V 2A 49 1C08 EEORIM 93C5L 50 8903 R CARBON RD 1 2T S 471 J 51 701 2305 001027 C FILM M PEF 224K 52 702 d 104K 23 7 Wiring Diagrams 7 1 Indoor Unit NDOOR PIPE TH DU BIN N2 KO JOO GRN YEL SKY BLUE Je TERMINAL BLOCK 1 POWER 2 POWER L 3 COMPRESSOR
15. DB60 30018A NUT FLANGE 10 8 1 12 4 DB63 10165D COVER TERM INAL NORYL 1 13 DB99 00018A ASS Y 4WAY V V ASS Y 1 13 1 DB62 40074C PACKED V V 1 2 10LT M IN 1 13 2 DB62 40036A AWAY V V CHV 0201 1 14 DB99 10136A ASS Y CHECK V V ASS Y 1 14 1 DB62 31800B TUBE CAPI C C1220T 0 1 14 2 DB62 40039B PACKED V V 1 4 1 4 INCH 1 14 3 DB62 31802B TUBE CAPI H C1220T 0 1 15 DB93 00110A ASS Y CONTROL OUT ASS Y 1 15 1 DB34 90057A SWITCH MAGNET 45CG20ALB 1 15 2 2501 001139 CAPACITOR DUAL 40 2 5 450V 1 15 3 DB65 40022D TERM INAL BLOCK 7P 20A 1 15 4 DB95 90026B SPARK KILLER 1 15 5 3601 000236 FUSE 2A 250V 1 16 DB72 50537A CLOTH SOUND 1 17 DB72 50544A CLOTH SOUND UP 1 18 1 DB93 00113A CONNECTOR WIRE 5P 1 18 2 DB67 20011A DRAIN PLUG OUT PP i 18 3 DB60 30010A NUT FLANGE 1 4 C3771BD 1 18 4 DB60 30010C NUT FLANGE 1 2 C3771BD 1 17 4 2 2 UQ24A2QC 13 1 5 En 18 2 18 3 Ty 184 ul 18 Parts List No CODE NO Description Specification es ME Remark UQ24A2QC 1 DB90 10634A ASS Y CABI FRONT SC 90073T 1 2 DB90 20210A ASS Y BASE OUT 5C 90073T 1 3 DB67 50074A ASS Y FAN AS 6 F20 1 4 DB60 20020A BOLT SPECIAL 8 125 1 5 DB31 10110E MOTOR FAN OUT OSM E 716SRC 1 6 DB95 20147A
16. P37 RST 1 ETEN 48 P10 l CR71 P31 l PCB DISPLAY amp MODULE 450V 1 2uF REMOCON PNA4612MDOXD 1 cuz I 220 1 88 1N4148 1 R901 wit 10 ES 1 1 AW vec 1 l R301 10K J 3 E I E 42 12 a GND I 5 1027 I E 0301 sw91 0901 OUT 1022 AUTO 1042 220 1 88 1 R403 6 8K 1 4W Jo rh 1 YEL A ed js SELECT ROO W su ORG 0401 W P22 1NT2 470 3 1 2W 8192 2 945 R404 DEICE 1 H P70 INTO LEDI B AW I R903 1 R402 I eM Red FAN MOTOR SMW250 03 BLU rh I 1 I 02 1 I 45Y 106 4 200257 AN lt P52 2598945942 R605 sr H 1 0801 1 47uF 50V TR ee i 751 I r3 CBF22208A 1006 1 AN 4 P53 KID65003A I R603 960 Rega piz 48 2 r 15 R305 nn Mu 15 43 4 13 R904 1 P 1608 AW 1 l I 93655 1 p13 44 3 14 R306 4 I I legs 8 est 53 532 16142 5 12 620 993 1 2W S 5 1 C503 d I P33 y p17 4L 6 P YELLOW I I 1047 DI SD 40 7 10 BH LETS 734 p20 a LSTEP MOTOR RIGHT LEFT 1 I 6 8 2 10K J48 T P35 EC A Q na I 5 MEE IEEE GL p EENES E lt G L en 1 2 3 ASS Y THERMISTOR 2 Iz fe fa Je fe fa ls ES Ao je ROOM TH penal Je z JE Je Es 10341 SMW250 04 WHT 8509 10K J NS WHT AWN El
17. RUBBER BEARING CR 1 1 14 2 DB61 40244A HOLDER BEARING PP 1 1 14 3 DB94 40007A BEARING PG5 1 1 15 PD Q24B1Q 02 ASS Y MAIN PCB PD Q24B1Q 02 1 PD Q24B1Q 05 ASS Y MAIN PCB PD Q24B1Q 05 1 16 DB32 10008E ASS Y TERM ISTOR 103AT 1 1 17 DB61 10163A CASE CONTROL ABS VO 1 1 18 DB94 20037C ASS Y BACK BODY HIPS 1 1 19 DB90 00163A HOLDER PIPE PP 1 1 20 DB70 10663A PLATE HANGER SGCC M 1 1 21 DB26 10065B TRANSFORM ER AC230V DC17V 1 1 15 4 2 Outdoor Unit 4 2 1 UQ18A2QC 18 4 18 3 16 Parts List 18K No CODE NO Description Specification 2 Remark 0018 20 1 DB90 00033A ASS Y WELD FRONT 5 90073 1 2 DB90 20160D ASS Y BASE OUT 5C 90073T 1 3 DB67 50063A ASS Y FAN 5 6 20 1 4 DB60 30020A NET FLANGE M6LF 1 9 DB31 10119H MOTOR FAN OUT 550357 1 6 0861 20008 BASE M OTOR SGCC M 1 7 DB94 50034A PARTITION SGCC M 1 8 DB75 30103E ASS Y CONDENSER ASS Y 1 9 DB90 40176B COVER CONTROL ABS 10 DB64 60172B ASS Y CABi BACK SC 90073T 1 11 DB90 40124A TOP COVER SC 90073T 1 12 48B190IV1EH COM PRESSOR 48B190IV2E7 if 12 1 DB73 10004A GROM ISOLATOR EPDM 3 12 2 DB60 30028A NUT WASHER M8 3 12 3
18. be linked by 6 cables Check the terminals if the indoor unit and outdoor unit are properly linked by the same number of cables Otherwise the airconditioner may not operate properly 3 When a problem occurs due to the contents illustrated in the table below it is a symptom not related to the malfunction of the airconditioner Operation of air conditioner Explanation The COOL operation indication LED Green blinks when a power plug of the indoor unit is plugged in for the first time It indicates power is on The LED stops blinking if the operation ON OFF button on the remote control unit is pushed mode and fan speed of the indoor unit decreases 2 COOL operation mode the compressor does not operate In happens after a delay of 3 minutes when the compressor is at a room temperature higher than the setting temperature reoperated The same phenomenon occurs when a power is on that the INDOOR FAN should operate As a phenomenon that the compressor is reoperated after a delay In a HEAT operation mode the compressor does not operate of 3 minutes the indoor fan is adjusted automatically with at a room temperature lower than the setting temperature reference to a temperature of the air blew that indoor fan should operate 3 Fan speed setting is not allowed in AUTO or DRY mode The speed of the indoor fan is set to LL in DRY mode Ge Fan speed is 5 steps is selected automatically
19. gerating Cycle block Diagram INDOOR UNIT Heat exchanger Evaporator Cross fan Liquid side Gas side OUTDOOR UNIT 2 way valve valve Capillary tube Check valve Heat exchanger Condenser Propeller fan 4 way valve 4 Cooling Compressor Gas leak check point Refrigerating cycle temperature and pressure STD Pressure Piping Use Temp Condition F Model Operating Condition psi Indoor Outdoor 3 WAY Valve ls L DB WB DB WB Standard 57 71 46 54 46 54 80 67 95 75 Cooling Max over load 80 67 115 75 Low temp 67 57 67 57 Standard 312 340 97 117 154 169 70 60 47 43 Heating Max over load 80 75 65 Deice 70 60 35 33 Standard 64 78 50 54 50 54 80 67 95 75 Cooling Max over load 80 67 115 75 Low temp 67 57 67 57 Standard 270 299 100 107 149 158 70 60 47 43 Heating Max over load 80 75 65 Deice 70 60 35 33 21 6 PCB Diagrams DB 93 10555C AQ18A 2QC 6 1 Main PCB DB 93 10545C AQ24A2QC _ 3 MTA BLU B al H ae kn le Sh x F xls za us LTS HE jz Ak AE RN am 3 Ele p DSN m n AH a y H i um dao
20. in AUTO mode 4 Compressor stops operation intermittently in DRY mode Compressor operation is controlled automatically in DRY mode 4 depending on the room temperature and humidity 5 Compressor of the outdoor unit is operating although it is When the unit is turned off while de ice is activated the turned off in a HEAT mode compressor continues operation for up to 9 minutes maximum until the deice is completed 6 Timer LED only of the indoor unit lights up and the Timer is being activated and the unit is in ready mode air conditioner does not operate The unit operates normally if the timer operation is cancelled 7 The compressor and indoor fan stop intermittently in HEAT The compressor and indoor fan stop intermittently if room mode temperature exceeds a setting temperature in order to protect the compressor from overheated air in a HEAT mode 8 Indoor fan and outdoor fan stop operation intermittently in The compressor operates in a reverse cycle to remove exterior ice a HEAT mode in a HEAT mode and indoor fan and outdoor fan do not operate intermittently for within 20 of the total heater operation 9 The compressor stops intermittently in a COOL mode or DRY The compressor stops intermittently or the fan speed of the indoor unit decreases to prevent inside outside air frozen depending on the inside outside air temperature 4 Indoor unit observes operation condition of the air conditioner and displays self diagnosis details
21. p sound heard from the main NO unit NO YES Check linkage between Y Boer a And Is DC voltage of the PCB module terminal tap normal Check fuse Y YES Are voltages of 59 compressor 48 4 way valve and 58 outdoor fan 7 of the micom normal 5VDC 15 14 18VAC appear in Is voltage of 1 indoor fan of the the secondary side of the micom normal power transformer DC5V ht NO YES 10ms Replace power transformer C Replace resonator X501 Y puo Is voltage at 32 terminal of the M icom normal ls voltage at 64 terminal of the M icom normal Y YES YES IEC mi NO Refer to remote control unit fault diagnosis NO Replace PCB module Are voltages at RY71 Compressor RY73 4 way valve and SY72 outdoor fan normal DC12V 15 voltage at SS71 indoor fan a YES Is voltage at 25 terminal of the micom normal 10ms YES Are voltage at 30 and 31 of the Is operation normal YES NO micom normal o 100ns y Yes NO gt Replace micom y YES y NO Check connections Replace compressor 4 Way RY71 RY73 valve outdoor fan and RY72 and indoor fan 5571 output voltage of ICO2 normal DC5V pe IET Check PCB pattern Replace main PCB Replace ICQ NO Is voltage output terminal of D101 D105 IN 4007
22. p45 53 1 REU A 1 R405 yy 330 442 En I 3 BROWN R407 N 12 2 m PSANI 3 Pink u 4 BLUE INDOOR PIPE TH 18 557 AN7 5 ORANGE I P65 ANS z 6 ELLOS 1 P64 AN4 P63 AN3 1005 suw2so 06 wil STEP MOTOR UP DOWN KID65003A I I P73 INT3 1 I 13 28 29 I I 1 1 2 x SA10 0MT I MB8962 89635 A I bannen ee ee ee _ ELECTRONICS
23. the second finger to the left and right handle and pull to open the inlet grille 4 Take the left and right filter out Take the Deadorizing and Electrostatic filter out ONLY 1 and 5 Series models 5 Loosen one of the right fixing screw and seperate the terminal cover 6 Loosen two fixing screws of front grille 7 Pull the upper left and right of discharge soft ly for the outside cover to be pulled out 8 Pull softly the lower part of discharge and push it up Caution Assemble the front panel and fix the hooks of left and right Parts Procedure Remark Ass y Tray Drain 1 Do 1 above Separate the drain hose from the extension drain hose 2 Take the display PCB out Center of indoor unit 3 Loosen two fixing screws of left and right 4 Pull tray drain out from the back body Electrical Parts 1 Do 1 2 above 2 Take all the connector of PCB upper side out Inclusion Power cord 3 Separate the outdoor unit connection wire from the terminal block 4 If pulling the M ain PCB up it will be taken out Separate the TRANS hook it before Heat Exchanger 1 Do 1 and 2 3 above 2 Loosen two fixing earth screws of right side 3 Separate the connection pipe 4 Separate the bush body at the upper side and holder at the rearside
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