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Samsung AS30C2BC Service Manual

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SERVICE
AIR CONDITIONER
E DB98-05388A(1)
ROOM AIR CONDITIONER
INDOOR UNIT
AS30C2BC
Manual
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. Schematic Diagrams
OUTDOOR UNIT
US30C2BC
CONTENTS

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Summary of Contents for Samsung AS30C2BC

  • Page 1 ROOM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT US30C2BC AS30C2BC 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. Schematic Diagrams...
  • Page 2 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 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. (Right of indoor unit) 3) Pull tray drain out from the back body. Electrical Parts 1) Do “1”, “2”, above.
  • Page 6 Parts Procedure Remark Fan Motor 1) Do “1” “2” ”3” “4”, above. Cross Fan 2) Loosen the fixing five screws and separate the holder motor. 3) Loosen the fixing screw of fan motor. 4) Separate the fan motor from the right fan.(A) 5) Loosen the fixing screw of the left fan.(B) 6) Seperate the both fan from the back body.
  • Page 7 2-2 Outdoor Unit Parts Procedure Remark COVER TOP 1) Loosen the screws on the cover top, and remove the cover top. BACK CABI 1) Loosen the screws on the side cabinet, and remove the side cabinet. CONTROL BOX 1) Loosen the screw on the control box, and remove the control box.
  • Page 8 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? The rating voltage ±10% range. (2) Is AC power linked correctly? (3) Is input voltage of DC regulator IC KA7805 (IC02) normal? (11.5VDC-12.5VDC) (4) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC) 2) Troubleshooting procedure Remove power cord and plug in again...
  • 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(8P)? 2) Troubleshooting procedure After unplugging out the power cord should be...
  • Page 12 3-2-4 When the UP/DOWN Louver Motor Does Not Operate. (Initial Diagnosis) 1) Checklist : (1) Is input voltage normal? (input 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. 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 Replace another PCB module Does al display lamp blink or STD lamp blink? Refer to set up the Model option...
  • Page 15 4. Exploded Views and Parts List 4-1 Indoor Unit...
  • Page 16 Parts List Q’TY Description Specification Remark CODE NO AS30C2BC DB92-00206D ASSY-PANEL ASSY DB64-00339A GRILLE AIR INLET DB63-00268A GUARD-AIR FILTER DB63-00290A FILTER-CLEANER ASSY ASSY DB61-00035A CASE CLEANER-FILTER DB63-00285A FILTER-CARBON 405 x 82 DB63-00286A FILTER-CLEANER 405 x 82 DB63-00270A COVER-TEMINAL DB60-00017A SPACER-EVAP...
  • Page 17 4-2 Outdoor Unit...
  • Page 18 Parts List Q’TY Description Specification Remark CODE NO US30C2BC DB90-00533B ASSY CABI FRONT ASSY DB63-00320A GUARD FAN MSWR DB90-20157R ASSY-BASE OUT ASSY DB67-00140A FAN-PROPELLER AS+G/F20% DB60-20020A BOLT-SPECIAL M8,L25 DB31-00103B MOTOR FAN OUT OSM-946SRC DB61-00653A BRACKET-MOTOR SGCC-M DB94-00120B ASSY PARTITION ASSY DB95-00297B ASSY COMP H29B35UABCA...
  • Page 19 4-3 PCB Box Indoor Unit Parts List Description Specification CODE-No Q’TY ASSY-TERMINAL BLOCK DB65-00073D ASSY-MODULE PCB B-PJT DB93-00830A ASS’Y C/W STEP MOTOR 6P, 1007 AWG #28 DB93-00877A C/W EARTH 1P, AWG#16, 1015 DB39-00148A HOLDER-CONTROL HIPS, BLK, V0 DB61-00632B HOLDER-CLAMP IN SGCC-M DB61-00495A BRACKET-EARTH...
  • Page 20 Outdoor Unit...

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