LG LRSC26980TT Service Manual - Page 86

TROUBLE DIAGNOSIS - 86 - Problems Symptom Causes Checks Measures Remarks Bad cooling. Freezer temperature is high. Compressor does not start. Compressor Lead Wire is cut. Defective compressor driving relay. Check compressor Lead Wire Reconnect Lead with a tester. Wire. Measure voltage at PCB CON2 Replace relay RY1 (3&9) after pressing main PCB and RY2 or PCB. test switch once. It is OK if voltage is normal. Refer to load driving circuit in circuit explanation. Defective freezer sensor. Defective Freezer sensor parts. Check resistance of freezer sensor with a tester. Replace freezer sensor. The wrong sensor Confirm the color of sensor in has been installed. circuits (main PCB sensor Order by model number housing). and part number. Repair main PCB sensor housing Refer to resistance characteristics table of sensor in circuit. Refer to tables on pages 40, 41, and 43. explanation. Defective freezer fan motor. Fan motor lead wire is cut. • Defective door switch (freezer, refrigerator, home bar). • Defective fan motor. • Defective fan motor driving relay. Check fan motor lead wire Reconnect lead with a tester. wire. Measure the voltage between • Replace door Refer to load PCB power blue line and fan switch (freezer, driving circuits in motor after pressing test switch refrigerator, and circuit of Main PCB. If the voltage is home bar). explanation. normal, it is OK. • Replace fan motor. • Replace relay RY5 & RY6 or PCB. Faulty defrost. Refer to faulty defrost items in trouble diagnosis functions. Refer to trouble diagnosis function.