Service Manual
Page 2
... Parts...16 Air Handling Parts ...17 Electrical Parts ...18 Refrigerating Cycle...20 Schematic Diagram...23 Electronic Control Device ...23 Wiring Diagram...25 Components Location ...26 Troubleshooting Guide ...28 Piping System ...28 Troubleshooting Guide ...29 Electrical Parts Troubleshooting Guide ...31 Electric Parts ...35 Exploded View ...41 Replacement Parts List ...43 2 Room Air Conditioner
... Parts...16 Air Handling Parts ...17 Electrical Parts ...18 Refrigerating Cycle...20 Schematic Diagram...23 Electronic Control Device ...23 Wiring Diagram...25 Components Location ...26 Troubleshooting Guide ...28 Piping System ...28 Troubleshooting Guide ...29 Electrical Parts Troubleshooting Guide ...31 Electric Parts ...35 Exploded View ...41 Replacement Parts List ...43 2 Room Air Conditioner
Service Manual
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... OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH COMPRESSOR OIL (LIQUID REFRIGERANT) CAPILLARY TUBE Figure 31 LIQUID OUTLET HIGH PRESSURE VAPOR LIQUID REFRIGERANT LOW PRESSURE VAPOR Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL FAN MOTOR EVAPORATOR COIL CAPILLARY TUBE COMPRESSOR TURBO FAN Figure 31 is a brief description of the refrigerant in what...
... OUTSIDE COOLING AIR FOR REFRIGERANT PASS THROUGH COMPRESSOR OIL (LIQUID REFRIGERANT) CAPILLARY TUBE Figure 31 LIQUID OUTLET HIGH PRESSURE VAPOR LIQUID REFRIGERANT LOW PRESSURE VAPOR Troubleshooting Guide Troubleshooting Guide Piping System CONDENSER COIL FAN MOTOR EVAPORATOR COIL CAPILLARY TUBE COMPRESSOR TURBO FAN Figure 31 is a brief description of the refrigerant in what...
Service Manual
Page 29
... improper application. Check clogging in refrigeration circuit. Satisfactory operation with temperature difference of inlet & outlet air ; 44~50°F(7~10°C) Replacement of compressor. Troubleshooting Guide Troubleshooting Guide In general, possible trouble is beyond repair. The one is called Starting Failure which is caused from an electrical defect, and the other is...
... improper application. Check clogging in refrigeration circuit. Satisfactory operation with temperature difference of inlet & outlet air ; 44~50°F(7~10°C) Replacement of compressor. Troubleshooting Guide Troubleshooting Guide In general, possible trouble is beyond repair. The one is called Starting Failure which is caused from an electrical defect, and the other is...
Service Manual
Page 30
... rotor, metal). Defect of compressor capacitor. Irregular motor resistance ( ). Irregular motor insulation ( ). Loose terminal connection. Replacement Improper thermostat setting. Capacitor check. Replacement of power voltage. Troubleshooting Guide Fails to start. Drop of fan motor. Improper wiring. Replacement of compressor (locking of power source.
... rotor, metal). Defect of compressor capacitor. Irregular motor resistance ( ). Irregular motor insulation ( ). Loose terminal connection. Replacement Improper thermostat setting. Capacitor check. Replacement of power voltage. Troubleshooting Guide Fails to start. Drop of fan motor. Improper wiring. Replacement of compressor (locking of power source.
Service Manual
Page 31
YES Is the Trans output power NO about AC 14V? NO (The No.14 of IC01D NO DC 12V? Electrical Parts Troubleshooting Guide Troubleshooting Guide Possible Trouble 1 The unit does not operate. NO • Check the Main PCB pattern. Is output Voltage of Micom is 5V.) YES Is the ...
YES Is the Trans output power NO about AC 14V? NO (The No.14 of IC01D NO DC 12V? Electrical Parts Troubleshooting Guide Troubleshooting Guide Possible Trouble 1 The unit does not operate. NO • Check the Main PCB pattern. Is output Voltage of Micom is 5V.) YES Is the ...
Service Manual
Page 32
... Unit delay for 3 minutes? Is the voltage No.10 NO of IC01M 0V? YES • Wait 3 Minutes. • Replace MAIN PCB Ass'y. Is setting Temp. Troubleshooting Guide Possible Trouble 2 The compressor does not operate. YES • Check the RY-COMP. • Connect LEAD Wire to lower Number.
... Unit delay for 3 minutes? Is the voltage No.10 NO of IC01M 0V? YES • Wait 3 Minutes. • Replace MAIN PCB Ass'y. Is setting Temp. Troubleshooting Guide Possible Trouble 2 The compressor does not operate. YES • Check the RY-COMP. • Connect LEAD Wire to lower Number.
Service Manual
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... the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Possible Trouble 5 The function of AC & DC PCB. Service Manual 33 Troubleshooting Guide • Replace IC01M. • Replace IC01M. Possible Trouble 4 FAN does not operate. YES Is the voltage No.3 of NO CN-AC/DC of AC...
... the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Possible Trouble 5 The function of AC & DC PCB. Service Manual 33 Troubleshooting Guide • Replace IC01M. • Replace IC01M. Possible Trouble 4 FAN does not operate. YES Is the voltage No.3 of NO CN-AC/DC of AC...
Service Manual
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NO Is the IC01G good? Troubleshooting Guide Possible Trouble 6 Remote controller does not operate. YES NO Is the connection of Battery NO over 2.3V? Possible Trouble 7 It displays abnormally on DC ...
NO Is the IC01G good? Troubleshooting Guide Possible Trouble 6 Remote controller does not operate. YES NO Is the connection of Battery NO over 2.3V? Possible Trouble 7 It displays abnormally on DC ...
Service Manual
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... • Replace the Trans. YES Is the Trans. output shorted? Is the reset circuit OK? YES • Replace D02D~D05D. • Replace IC01D. ElectrIc Parts Troubleshooting Guide Possible Trouble 1 The unit does not operate. Is output Voltage of Micom DC 5V? NO (208/230V for LWL1230WAL) • Check the Fuse. •...
... • Replace the Trans. YES Is the Trans. output shorted? Is the reset circuit OK? YES • Replace D02D~D05D. • Replace IC01D. ElectrIc Parts Troubleshooting Guide Possible Trouble 1 The unit does not operate. Is output Voltage of Micom DC 5V? NO (208/230V for LWL1230WAL) • Check the Fuse. •...
Service Manual
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... Diagram. Possible Trouble 3 The compressor always operate. Is the voltage No.10 NO of IC01M 0V? YES • Wait 3 Minutes. • Replace AC PCB Ass'y. Troubleshooting Guide Possible Trouble 2 The compressor does not operate.
... Diagram. Possible Trouble 3 The compressor always operate. Is the voltage No.10 NO of IC01M 0V? YES • Wait 3 Minutes. • Replace AC PCB Ass'y. Troubleshooting Guide Possible Trouble 2 The compressor does not operate.
Service Manual
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... OK? Possible Trouble 5 Remote controller does not operate. YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Troubleshooting Guide • Replace IC01M. • Replace IC01M. • Replace the battery. • Check the PCB pattern. • Connect connector to CN-AC/DC exactly. YES...
... OK? Possible Trouble 5 Remote controller does not operate. YES • Check the RY-Hi or RY-Med or RY-Lo. • Check the wiring diagram. Troubleshooting Guide • Replace IC01M. • Replace IC01M. • Replace the battery. • Check the PCB pattern. • Connect connector to CN-AC/DC exactly. YES...
Service Manual
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NO Are the IC01G and IC02G good? YES Does IC03G NO operate normally on DC PCB Ass'y. YES • Replace the DC PCB Ass'y. • Replace IC01G, IC02G. • Connect connector to CN-AC/DC exactly. • Replace IC03G. 38 Room Air Conditioner YES NO Is the connection of NO CN-AC/DC OK? Troubleshooting Guide Possible Trouble 6 It displays abnormally on AC PCB Ass'y?
NO Are the IC01G and IC02G good? YES Does IC03G NO operate normally on DC PCB Ass'y. YES • Replace the DC PCB Ass'y. • Replace IC01G, IC02G. • Connect connector to CN-AC/DC exactly. • Replace IC03G. 38 Room Air Conditioner YES NO Is the connection of NO CN-AC/DC OK? Troubleshooting Guide Possible Trouble 6 It displays abnormally on AC PCB Ass'y?
Service Manual
Page 39
... missing, replace it . if motor shaft will not rotate, replace the motor. Check wire locations. If cracked, out of the fan motor with mounting screw(s). Troubleshooting Guide COMPLAINT Fan motor will not run , but fan motor runs. Fan motor runs intermittently Fan motor noise. Fan blade hitting shroud or blower wheel...
... missing, replace it . if motor shaft will not rotate, replace the motor. Check wire locations. If cracked, out of the fan motor with mounting screw(s). Troubleshooting Guide COMPLAINT Fan motor will not run , but fan motor runs. Fan motor runs intermittently Fan motor noise. Fan blade hitting shroud or blower wheel...