LG LRTN22310 - Manual (Page 24)

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7-4 TROUBLESHOOTING
COMPLAINT
Electronic Display not operating correctly Not Cooling Not cold enough Not defrosting
1. No Display at all 2. Partial or
abnormal display
1. Display on but
compressor not operating
2. Display on
compressor is operating
1. Frosted up in
Freeer
1. Supply voltage not within specifications 2. Open in wiring harness from PWB board 3. Open in door monitor switch circuit 1. Supply voltage not within specifications 2. Open in wiring harness from PWB board 1. Compressor not operating 2. Open in compressor circuit 1. Condenser fan motor not operating 2. Condenser coils blocked 3. Evaporator fan motor not operating 4. Damper not opening or internal air flow blocked 5. Sensor not operating properly 6. Door not sealing 7. Evaporator Frosted up 8. Sealed System related problem 1. Open in defrost circuit 2. Defrost sensor not operating correctly 3. Defrost drain clogged
1. Check supply voltage to refrigerator 2. Check wiring and connectors to PWB board 3. Check door monitor circuit 1. Check supply voltage to refrigerator 2. Check wiring and connectors to and from PWB
board
1. Check for compressor operation by using the test
key on main circuit board
2. Check for open on OLP, PTC, compressor,
wiring, etc.
1. Check condenser fan motor and wiring circuit 2. Check air flow across condenser 3. Check evaporator fan motor and wiring circuit 4. Check damper motor circuit 5. Check refrigerator and freezer sensors 6. Check for proper door esal 7. Check defrost circuit components 1. Check defrost heater and circuit using Test Key 2. Check sensor 3. Check drain
SYMPTOM
POSSIBLE CAUSES
SOLUTION