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Samsung AS18A9RCF Service Manual

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E DB98-15775A(1)
SERVICE
SPLIT TYPE AIR CONDITIONER
Indoor Unit
AS18A9(0)RCF
AS24A1(2)RC
Manual
Outdoor Unit
US18A9(0)RCF
US24A1(2)RC

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Summary of Contents for Samsung AS18A9RCF

  • Page 1 SERVICE Manual SPLIT TYPE AIR CONDITIONER Indoor Unit Outdoor Unit AS18A9(0)RCF US18A9(0)RCF AS24A1(2)RC US24A1(2)RC E DB98-15775A(1)
  • Page 3 Safety Precautions The following safety precautions must be taken when using your air conditioner. Risk of electric shock. • Can cause injury or death. • Disconnect all remote electric WARNING power supplies before servicing, installing or cleaning. • This must be done by the manufacturer or its service agent or a similar qualified person in order to avoid a hazard.

  • Page 4: Table Of Contents

    Contents Ι Ι ISASSEMBLE AND EASSEMBLE 1. Indoor unit 2. Outdoor unit Ι Ι Ι Ι ET UP THE OPTION CODE Ι Ι Ι Ι Ι Ι ROUBLESHOOTING 1. Items to be checked first 2. Abnormal diagnosis by symptom 3. Replace PCB module Ι...

  • Page 5: Ι Ι

    Ι Ι Disassemble and reassemble Stop operation of the air conditioner and remove the power cable before repairing the unit. 1 Indoor unit If you disassemble the heat exchanger, you must pump down at first. Part Procedure Remark Front Panel 1) Stop the operation of the air conditioner and block the main power.
  • Page 6 Procedure Remark Part Front Panel 7) Pull the upper left and right of discharge softly so that the outside cover is 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.
  • Page 7 Ι Ι Disassemble and reassemble (cont’d) Procedure Remark Part Electrical 1) Take out all the connector of PCB Parts on the upper part. (Main PCB) 2) Separate the outdoor unit connection wire from the terminal block. 3) If you pull out the main PCB up, it will be taken out.
  • Page 8 Procedure Remark Part Fan Motor and 1) Loosen two screws and separate the Cross Fan motor holder. 2) Loosen the screw of fan motor. (By use of M3 wrench) 3) Separate the fan motor from the fan. 4) Separate the fan from the left holder bearing.

  • Page 9: Outdoor Unit

    Ι Ι Disassemble and reassemble (cont’d) 2 Outdoor unit US18A9(0)RCF Part Procedure Remark Common Work 1) Loosen the fixing screws and separate the cover control. 2) Separate the connection wire from the terminal block. 3) Loosen the fixing screws and separate the upper cabinet.
  • Page 10 Part Procedure Remark Common Work 8) Loosen the fixing screws and separate the cabinet side. Fan and Motor 1) Remove the nut flange (Turn to the clockwise). 2) Separate the fan. 3) Loosen four screws to separate the motor. Heat Exchanger 1) Release the refrigerant at first.
  • Page 11 Ι Ι Disassemble and reassemble (cont’d) US24A1(2)RC Part Procedure Remark Common Work 1) Loosen the fixing screws and separate the cover control. 2) Separate the connection wire from the terminal block. 3) Loosen the fixing screws and separate the upper cabinet. 4) Loosen the fixing screws and separate the front cabinet.
  • Page 12 Part Procedure Remark Common Work 7) Loosen the fixing screws and separate the cabinet side. Fan and Motor 1) Loosen the fixing bolt and separate the fan. 2) Loosen four fixing bolts to separate the motor. Heat Exchanger 1) Release the refrigerant at first. and compressor 2) Disassemble the inlet and outlet pipe by welding.

  • Page 13: Set Up The Option Code

    Ι Ι Ι Ι Set up the option code The method for setting up the model option with the remote control It is necessary to set up option codes after replacing the main PCB with service parts. Make sure that you can set up option codes of the remote control after replacing the main PBA. Otherwise, the unit won’t be working properly and all LED lamps on display will be flickering.
  • Page 14 7) If the first number is , it is correct. Otherwise, press the button until appears. 8) When pressing the button on the display, select one of them. 9) When pressing the button on the display, select one of them. 10) When pressing the button on the display, select one of them.
  • Page 15 Ι Ι Ι Ι Set up the option code (cont’d) A table of the option code Model Option code AS18A9RCF 09000-1A0201 AS18A0RCF 08000-1A0201 AS24A1RC 09000-1A0340 AS24A2RC 08000-1A0340...

  • Page 16: Troubleshooting

    Ι Ι Ι Ι Ι Ι Troubleshooting 1 Items to be checked first 1) The input voltage should be voltage rating within ±10% range. The air conditioner may not operate properly if the voltage is out of this range. 2) Is the connection cable linking the indoor unit and the outdoor unit properly? The indoor unit and the outdoor unit shall be linked by six cables.

  • Page 17: Abnormal Diagnosis By Symptom

    Ι Ι Ι Ι Ι Ι Troubleshooting (cont’d) 2 Abnormal diagnosis by symptom 1. No Power - Initial diagnosis 1. No Power - Initial diagnosis 1) Checklist : (1) Is input voltage normal? (voltage rating within ±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 input voltage of DC regulator IC KA7805 (IC02) normal? (11VDC-12.5VDC) (5) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC)
  • Page 18 2. When the Indoor Unit Fan Does Not Operate - Initial Diagnosis 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 the indoor fan motor properly connected with the connector (CN43)? (4) Is the running capacitor properly connected with PCB board?
  • Page 19 Ι Ι Ι Ι Ι Ι Troubleshooting (cont’d) 3. When the Outdoor Unit Does Not Operate - Initial Diagnosis 3. When the Outdoor Unit Does Not Operate - Initial Diagnosis 1) Checklist : (1) Is input voltage normal? (voltage rating within ±10% range) (2) Is the set temperature of the remote control higher than room temperature in the Cool mode? (3) Is the POWER IN connector (CN78) linked correctly? (4) Is the outdoor unit properly connected with the terminal black connector(5P)?
  • Page 20 4. When the UP/DOWN Louver Motor Does Not Operate - Initial Diagnosis 4. When the UP/DOWN Louver Motor Does Not Operate - Initial Diagnosis 1) Checklist : (1) Is input voltage normal? (voltage rating within ±10% range) (2) Is the UP/DOWN louver motor properly connected with the connector (CN61)? 2) Troubleshooting procedure Remove the power cord and plug it in again in approx.
  • Page 21 Ι Ι Ι Ι Ι Ι Troubleshooting (cont’d) 5. When the remote control does not operate - lnitial Diagnosis 5. When the remote control does not operate - lnitial Diagnosis 1) Troubleshooting procedure Remove the power cord and plug it in again approx. five Seconds Does the STD lamp blink? Check as the procedure “No Power”...

  • Page 22: Replace Pcb Module

    3 Replace PCB module Remove the power cord Replace the PCB module Check the connection and plug in Does the display lamp blink or STD lamp blink? Replace another PCB module Refer to ‘set up the option code’...

  • Page 23: Ι Ι Λ Λ

    Ι Ι Λ Λ Assembly drawing and part’s list 1 Indoor unit 13-1 10-1 10-2...
  • Page 24 Part’s List Q’TY Code No. Description Specification AS18A9(0)RCF AS24A1(2)RC DB64-00127A GRILLE AIR INLET HIPS DB63-30150C GUARD AIR FILTER DB95-00287N CLEANER FILTER ASS´Y ASS’Y DB61-10164B CASE-CLEANER FILTER DB63-00436D CARBON FILTER POLYESTER/CARBON DB63-00435D CLEANER FILTER POLYESTER/COTTON DB63-00091A COVER TERMINAL ABS(V0) DB64-00130A FRONT PANEL HIPS DB93-00311C ASS´Y PCB DISPLAY...

  • Page 25: Outdoor Unit

    Ι Ι Λ Λ Assembly drawing and part’s list (cont’d) 2 Outdoor unit US18A9(0)RCF 12-4 12-3 15-2 12-2 15-1 15-3 12-1 15-5 13-1 15-6 15-4 17-1 17-2...
  • Page 26 Part’s List Code No. Description Specification Remark Q’TY DB90-00653K ASS’Y-CABI FRONT SC-90073T DB90-20160H ASS’Y-BASE OUT SC-90073T DB67-50063A FAN-PROPELLER AS+G/F20% DB60-30020A NUT-FLANGE 2C, M6, SM20C, NTR DB31-00056D MOTOR FAN OUT ASS030ZTEC DB61-20008C MOTOR B/K BASE SGCC-M DB94-00165A ASS’Y-PARTITION ASS’Y DB96-01523C ASS’Y-COND UNIT ASS’Y DB90-40176B ASS’Y COVER-CONTROL...
  • Page 27 Ι Ι Λ Λ Assembly drawing and part’s list (cont’d) US24A1(2)RC 14-1 15-6 12-2 14-2 15-4 12-1 15-5 13-1 15-3 15-1 15-2 17-1 17-2...
  • Page 28 Part’s List Code No. Description Specification Q’TY Remark DB90-00652P ASS’Y CABI FRONT ASS’Y DB90-20210A ASS’Y-BASE OUT ASS’Y DB67-50074A FAN-PROPELLER AS+G/F20% DB60-20020A BOLT SPECIAL M8 L25 DB31-00027F MOTOR FAN OUT OSME-906SRC DB95-20147A ASS’Y-MOTOR B/K SGCC-M DB94-50039C ASS’Y-PARTITION SGCC-M DB96-01917A ASS’Y-COND UNIT ASS’Y DB90-40176B ASS’Y-COVER-CONTROL...

  • Page 29: Pcb Box

    Ι Ι Λ Λ Assembly drawing and part’s list (cont’d) 3 PCB Box Part’s List Specification Description Remark Q’TY AS18A9(0)RCF / AS24A1(2)RC ASS’Y MAIN PCB DB93-01985A ASS’Y THERMISTOR 103AT / DKS-103FW ASS’Y PCB DISPLAY ASS’Y CASE CONTROL COVER DISPLAY...

  • Page 30: Λ Λ

    Λ Λ Refrigerating Cycle Block Diagram Indoor unit Outdoor unit Capillary tube 2-way valve Liquid side Heat Heat exchanger exchanger (Evaporator) (Condenser) Gas side 3-way valve Cooling Compressor Gas leak check point Refrigerating cycle temperature and pressure Piping Temp.[°F/(°C)] Use Temp. Condition [°F/(°C)] STD Pressure Model Operating Condition...

  • Page 31: Λ Λ Ι Ι

    Λ Λ Ι Ι Performance curve Data is based on condition of indoor humidity 50%. Air flow should be set at HI. AS18A9(0)RCF Total power consumption Indoor intake air WB temperature(°F) Outdoor intake air DB temperature(°F) Total capacity Indoor intake air WB temperature(°F) Outdoor intake air DB temperature(°F)
  • Page 32 High pressure Indoor DB temperature(°F) Outdoor ambient DB temperature(°F) Low pressure Indoor DB temperature(°F) Outdoor ambient DB temperature(°F)
  • Page 33 Λ Λ Ι Ι Performance curve (cont’d) Suction temperature Indoor DB temperature (°F) Outdoor ambient DB temperature (°F) Discharge temperature Indoor DB temperature(°F) Outdoor ambient DB temperature (°F)
  • Page 34 AS24A1(2)RC Total power consumption Indoor intake air WB temperature(°F) Outdoor intake air DB temperature(°F) Total capacity Indoor intake air WB temperature(°F) Outdoor intake air DB temperature(°F)
  • Page 35 Λ Λ Ι Ι Performance curve (cont’d) High pressure Indoor DB temperature(°F) Outdoor ambient DB temperature(°F) Low pressure Indoor DB temperature(°F) Outdoor ambient DB temperature(°F)
  • Page 36 Suction temperature Indoor DB temperature(°F) Outdoor ambient DB temperature (°F) Discharge temperature Indoor DB temperature (°F) Outdoor ambient DB temperature (°F)

  • Page 37: Pcb Diagram

    Λ Λ Ι Ι Ι Ι PCB Diagram 1 Main PCB...
  • Page 38 Part’s List Location No. Description Specification Q’TY C103 C-CERAMIC,DISC 2.2nF,20%,400V,Y5U,TP,12. C702 C-FILM,MPPF 100nF,10%,275V,BK,18x6x12,15 CR71 C-FILM,MPPF 2000nF,+10-5%,450V,BK,38x18x C701 C-FILM,MPEF 220NF,10%,275V,BK,26.5X8.5X1 RY71,72,74 RELAY-MINIATURE 12VDC,200MW,3000MA,1FORM SS71 12Vdc,-,2A,1mS,1mS IC04 IC MICOM S3C8469(SDIP) IC02 IC-VOLT REGU KA7805A,TO-220AB,1A,0/125C, TN11 TRANS 2UEW0.30/2UEW0.45,1.5KV,1KHz,-,7Pi FT71 CHOKE-COIL LSA-05230P,AC250V,2A,30.5x22x3 BZ61 BUZZER CBE2220BA,STICK,-,-,-,-,-,-,- F701 FUSE...

  • Page 39: Wiring Diagram

    Λ Λ Ι Ι Ι Ι Ι Ι Wiring diagram 1 Indoor unit AS18A9(0)RCF/AS24A1(2)RC This document can not be used without Samsung’s authorization.

  • Page 40: Outdoor Unit

    POWER RELAY TB1, 2 TERMINAL BLOCK FUSE(2A, 250V~) FAN MOTOR SPARK KILLER CAPACITOR US24A1(2)RC MARK NAME MARK NAME POWER RELAY TB 1, 2 TERMINAL BLOCK CAPACITOR FAN MOTOR FUSE(2A, 250V~) SPARK KILLER This document can not be used without Samsung’s authorization.

  • Page 41: Ι Ι Χ Χ

    Ι Ι Χ Χ Schematic diagram 1 Indoor unit AS18A9(0)RCF/AS24A1(2)RC This document can not be used without Samsung’s authorization.
  • Page 42 MEMO...
  • Page 43 ELECTRONICS This Service Manual is a property of Samsung Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under applicable lnternational and/or domestic law.

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