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Samsung AS18A2QC Service Manual

Other manuals for AS18A2QC: Owner's Instructions & Installation Manual
Manual is about: Dustless

Summary of AS18A2QC

  • Page 1

    Service manual contents air conditioner 1. Installation 2. Disassembly and reassembly 3. Troubleshooting 4. Exploded views and parts list 5. Refrigerating cycle block diagrams 6. Wiring diagrams 7. Schematic diagrams room air conditioner indoor unit as24a2qc as18a2qc outdoor unit us24a2qc us18a2qc e...

  • Page 2: 1. Installation

    1 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). 3. Connect the tank to refill with refrigerant 4. Set the unit to cool operation mode. 7. Stop operation of...

  • Page 3

    2 1-2 “pump down” procedure relocation of the air conditioner • refer to this procedure when the unit is relocated. 1. Carry out the pump down procedure (refer to the details of 'pump down'). 2. Remove the power cord. 3. Disconnect the assembly cable from the indoor and outdoor units. 4. Remove the ...

  • Page 4: 2-1 Indoor Unit

    3 2. Disassembly and reassembly 2-1 indoor unit stop operation of the air conditioner and remove the power cord before repairing the 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 the s...

  • Page 5

    4 no parts procedure remark ass’y tray drain. Electrical parts (main pcb) heat exchanger 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 bo...

  • Page 6

    5 no parts procedure remark fan motor and cross fan 1) do “1” “2” ”3” “4”, 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. ...

  • Page 7: 2-2 Outdoor Unit

    6 2-2 outdoor unit no parts procedure remark cabinet fan motor & propeller fan 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 ...

  • Page 8: 3. Troubleshooting

    7 3. Troubleshooting 3-1 items to be checked first 1) is the voltage of the power correct? The input voltage shall be rating voltage ±10% the airconditioner may not operate properly if the voltage is out of this range. 2) is the link cable linking the indoor unit and the outdoor unit linked properly...

  • Page 9

    8 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) (2) is ac power linked correctly? (3) are connections between primary side, secondary side of the power transformer and pcb good. (4) is output v...

  • Page 10

    3-2-2 when the indoor unit fan does not operate. (initial diagnosis) 9 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 capa...

  • Page 11

    10 3-2-3 when the outdoor unit does not operate. (initial diagnosis) 1) checklist : (1) is input voltage normal?(rating voltage ±10% range) (2) is the set temperature of the remote control higher than room temperature in cool mode? (3) is the power in connector (cn78) linked correctly? (4) is the ou...

  • Page 12

    11 3-2-4 when the up/down louver 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 appro...

  • Page 13

    12 3-2-5 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? Check as in the procedure “no power parts”. Refer to page 5-2. Normal replace battery. Lcd is faulty. Replace...

  • Page 14

    13 memo 1- 5/14/01 8:44 pm page 13.

  • Page 15: 4-1 Indoor Unit

    14 4. Exploded views and parts list 4-1 indoor unit 10 14-2 14-1 20 19 18 17 12 13 15 16 8-1 8-2 6 5 3 1 2 8 9 4 4-1 4-2 4-3 7 14 14-3 11 11-1 11-3 11-2 21 1- 5/14/01 8:44 pm page 14.

  • Page 16

    15 ■ parts list no. 1 2 3 4 4-1 4-2 4-3 5 6 7 8 8-1 8-2 9 10 11 11-1 11-2 11-3 12 13 14 14-1 14-2 14-3 15 16 17 18 19 20 21 code no db64-10173a db64-70108a db63-30150a db74-10101c db61-10164b db74-10082a db74-10081a db63-10466a db92-70095c db93-10599c db94-10083h db31-10153b db66-30181a db75-40087e ...

  • Page 17: 4-2 Outdoor Unit

    8 16 17 7 6 11 1 4 3 2 5 10 12 13-1 15 15-4 15-5 15-3 15-2 15-1 14 14-1 13 19 14-2 16 4-2 outdoor unit 4-2-1 us18a2qc 18-2 18-3 18-1 18 9 12-3 12-4 12-2 12-1 12 1- 5/14/01 8:44 pm page 16.

  • Page 18

    17 ■ parts list no. Code no ass’y-weld front ass’y-base out ass’y-fan net flange motor fan out base-motor partition ass’y-condenser cover-control ass’y-cabi back top cover compressor grommet isolator nut washer nut flange cover terminal ass’y-suction packed v/v 1/2” ass’y-tube capi tube capi packed ...

  • Page 19

    18 4-2-2 us24a2qc 8 16 17 7 6 11 1 4 3 2 5 10 12 13-1 15 15-4 15-5 15-3 15-2 15-1 14 14-1 13 19 14-2 18-2 18-3 18-1 18 9 1- 5/14/01 8:44 pm page 18.

  • Page 20

    19 ■ parts list no. Code no ass’y-cabi front ass’y-base out ass’y-fan bolt special motor fan out ass’y-motor b/k partition ass’y-condenser cover-control cabi side out top cover compressor ass’y-suction packed v/v5/8” ass’y-tube capi tube capi(c) packed v/v 1/4” ass’y control out switch magnet capaci...

  • Page 21

    20 4-2-3 pcb box ■ parts list 1 2 4 3 5 no 1 2 3 4 5 code no db61-10163a db93-10553c db32-10008e db93-10599b db26-10065b description case-control ass'y main pcb ass'y thermistor ass’y pcb display transformer specification pd-s18b1q-02 103at 240/240 ass’y ac230v/dc17 q’ty as24a2qc as18a2qc 1 1 1 1 1 ...

  • Page 22

    21 5. Refrigerating cycle block diagram indoor unit outdoor unit heat exchanger (evaporator) gas side 3-way valve 2-way valve liquid side capillary tube gas leak check point cross fan heat exchanger (condenser) propeller fan compressor t 1 t 2 cooling refrigerating cycle temperature and pressure std...

  • Page 23: 6. Pcb Diagrams

    22 6. Pcb diagrams 6-1 main pcb(db93-10553c) : as24a2qc, as18a2qc 1- 5/14/01 8:44 pm page 22.

  • Page 24

    23 ■ parts list no. Part code no design location de32-10037a de47-40024a de13-20008a de62-30032a de60-10100a de13-10016a 2001-000776 2001-000588 2001-000065 2001-000036 2001-000042 2001-000855 2001-001088 2001-000890 a1000-0244 2004-001137 0402-000137 b4190-0016 de30-20016a 2202-000783 2202-000796 2...

  • Page 25: 7. Wiring Diagrams

    24 7. Wiring diagrams 7-1 indoor unit 1- 5/14/01 8:44 pm page 24.

  • Page 26: 7-2 Outdoor Unit

    25 7-2 outdoor unit mark name mark name 52c magnetic contactor tb 1,2 terminal block c1 capacitor fm fan motor f fuse(2a,250v~) s spark killer mark name mark name 52c magnetic contactor tb 1,2 terminal block c1 capacitor fm fan motor f fuse(2a,250v~) s spark killer ■ us24a2qc ■ us18a2qc 1- 5/14/01 8...

  • Page 27

    27 26 8. Schematic diagrams 8-1 indoor unit.

  • Page 28

    Electronics cover 5/14/01 8:39 pm page 2.