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Samsung AS24A2RC Service Manual
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Samsung AS24A2RC Service Manual

Samsung AS24A2RC Service Manual

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SERVICE
AIR CONDITIONER
E DB81-00189A(2)
ROOM AIR CONDITIONER
INDOOR UNIT
AS24A2RC
AS18A6RC
Manual
OUTDOOR UNIT
US24A2RC
US18A6RC
CONTENTS

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Summary of Contents for Samsung AS24A2RC

  • Page 1: Table Of Contents

    ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT AS24A2RC US24A2RC AS18A6RC US18A6RC SERVICE Manual AIR CONDITIONER CONTENTS 1. Installation 2. Disassembly and Reassembly 3. Troubleshooting 4. Exploded Views and Parts List 5. Refrigerating Cycle Block Diagrams 6. PCB Diagrams 7. Wiring Diagrams 8.

  • Page 2: Installation

    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). 2. 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.
  • Page 3 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. 1. 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.

  • Page 4: Disassembly And Reassembly

    2. Disassembly and Reassembly Stop operation of the air conditioner and remove the power cord before repairing the unit. 2-1 Indoor Unit Parts Procedure Remark Front Grille 1) Stop the air conditioner operation and block the main power. 2) Seperate tape of front panel upper. 3) Contract the second finger to the left, and right handle and pull to open the inlet grille.
  • Page 5 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 (Main PCB)
  • Page 6 Parts Procedure Remark Fan Motor and 1) Do “1” “2” ”3” “4”, above. Cross Fan 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 Parts Procedure Remark 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.

  • Page 8: Troubleshooting

    3. Troubleshooting 3-1 Items to be checked first 1) The input voltage should be rating voltage 10% range. 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? The indoor unit and the outdoor unit shall be linked by 6 cables.
  • Page 9 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 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) Troubleshooting procedure...
  • Page 10 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...
  • Page 11 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 outdoor unit properly connected with the TERMINAL BLOCK connector(5P)? Troubleshooting procedure After unplugging out the power cord should be recon-...
  • Page 12 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)? Troubleshooting procedure Remove power cord and plug in again in approx. 5 seconds. Is operating lamp blinking? Check as in the procedure "No Power parts".
  • Page 13 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 8. “...
  • Page 14 3-3 Replace PCB module 3-3-1 Replace PCB module Remove power cord Replace the PCB module Check the connection and plug in Does al display lamp blink or STD lamp blink? Replace another PCB module Refer to set up the Model option...

  • Page 15: Exploded Views And Parts List

    4. Exploded Views and Parts List 4-1 Indoor Unit 13-2 13-1 13-3 10-1 10-3 10-2...
  • Page 16 Parts List (Cooling Only) Q’TY Description Specification Remark CODE NO AS24A2RC AS18A6RC DB92-00035A ASS´Y FRONT PANEL ASS’Y DB64-00127A GRILLE AIR INLET HIPS PANEL FRONT HIPS DB64-00130A DB63-30150C GUARD AIR FILTER DB74-10101C CLEANER FILTER ASS’Y ASS’Y DB61-10164B CASE CLEANER FILTER DB74-10082A...
  • Page 17 4-2 Outdoor Unit 4-2-1 24K BTU 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 18 Parts List Q’TY Description Specification Remark CODE NO US24A2RC DB90-10634A ASS’Y WELD FRONT SC-90073T DB90-20210A ASS’Y-BASE OUT SC-90073T DB67-50074A ASS’Y-FAN 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 PARTITION SGCC-M DB75-30102F ASS’Y-CONDENSER ASS’Y DB90-40176B COVER-CONTROL...
  • Page 19 4-2-2 18K BTU 12-4 14-1 12-3 15-6 15-4 12-2 12-1 15-5 15-3 13-1 15-1 15-2 17-1 17-2...
  • Page 20 Parts List Q’TY Description Specification Remark CODE NO US18A6RC DB90-00260A ASS’Y-CABI FRONT SC-90073T DB90-20210B ASS’Y-BASE OUT SC-90073T DB67-50074A ASS’Y-FAN AS+G/F20% DB60-20020A BLOT SPECIAL M8L25 DB31-10119C MOTOR FAN OUT ASS035ZTEE DB95-20147A ASS’Y-MOTOR B/K SGCC-M DB94-00080A PARTITION SGCC-M DB75-00058B ASS’Y-CONDENSER ASS’Y DB90-40176B COVER-CONTROL ABS(V5) DB64-60160B...
  • Page 21 4-2-3 PCB Box Parts List Description Q’TY Remark Specification ASS’Y MAIN PCB PD-TQ24A1R-01 ASS’Y THERMISTOR 103AT 240/240 ASS’Y PCB DISPLAY ASS’Y CASE CONTROL COVER DISPLAY...

  • Page 22: Refrigerating Cycle Block Diagrams

    Refrigerating cycle temperature and pressure STD Pressure Piping Temp(°F) Use Temp. Condition(°F) MODEL Operating Condition (psi) Indoor Outdoor 3-Way Valve Standard 57~71 46~54 46~54 AS24A2RC Cooling Max over load Low temp Standard 64~78 50~54 50~54 AS18A6RC Cooling Max over load Low temp...

  • Page 23: Pcb Diagrams

    6. PCB Diagrams 6-1 Main PCB(PD-TQ24AIR-01)
  • Page 24 Parts List Specification DESIGN LOCATION Description F701 FUSE FST 250V 3.15A F701,F101 HOLDER-FUSE FH-51H 7.5A IC-VOLT REGU KA7805A CR71 C-FILM CQS 450V 2.OuF FT71 FITER NOISE LSA05230P 250V-2A 23mH*2 R104,105 R-CARBON RD 1/4 TP 221-J R102,103 R-CARBON RD 1/4 TP 334-J R405,406 R-CARBON RD 1/8 TP 331-J...

  • Page 25: Wiring Diagrams

    7. Wiring Diagrams 7-1 Indoor Unit AS24A2RC AS18A6RC...
  • Page 26 7-2 Outdoor Unit US24A2RC DIAGRAM-OUTDOOR MARK NAME MARK NAME MAGNETIC CONTACTOR TB 1, 2 TERMINAL BLOCK CAPACITOR FAN MOTOR FUSE(2A, 250V~) SPARK KILLER US18A6RC DIAGRAM-OUTDOOR MARK NAME MARK NAME MAGNETIC CONTACTOR TB1, 2 TERMINAL BLOCK FUSE(2A, 250V~) FAN MOTOR SPARK KILLER...
  • Page 27 ME MO...

  • Page 28: Schematic Diagrams

    8. Schematic Diagrams 8-1 Indoor Unit...
  • Page 29 ELECTRONICS...

This manual is also suitable for:

As18a6rcUs24a2rcUs18a6rc