LG Electronics GR-P257/L257, GR-P227/L227 service manual Trouble Diagnosis, Trouble Shooting

TROUBLE DIAGNOSIS

1. Trouble Shooting

CLAIMS.						CAUSES AND CHECK POINTS.					HOW TO CHECK
1. Faulty start	1) No power on outlet.										* Measuring instrument :
	2) No power on cord.										Multi tester
			Bad connection between adapter and outlet. (faulty adapter)								■ Check the voltage.
				The Inner diameter of adapter.							If the voltage is within ±85%
				The distance between holes.							of the rated voltage, it is OK.
				The distance between terminals.							■ Check the terminal
				The thickness of terminal.
											movement.
			Bad connection between plug					and adapter (faulty plug).
				The distance between pins.
				Pin outer diameter.
	3) Shorted start circuit.
		No power on			Disconnected copper wire.					Power cord is disconnected.	■ Check both terminals of
		power cord.								Faulty soldering.	power cord.
					Internal electrical short.						Power conducts : OK.
									Loose contact.		No power conducts : NG
					Faulty terminal contact.
									- Large distance between
									male terminal.
									- Thin female terminal.
									Terminal disconnected.
									Bad sleeve assembly.
					Disconnected.		Weak connection.
							Short inserted cord length.
							Worn out tool blade.
		O.L.P is off.			Capacity of O.L.P is small.
					Characteristics of O.L.P is bad.						■ Check both terminals of
					Bad connection.
											O.L.P.
					Power is		Inner Ni-Cr wire blows out.				If power conducts : OK.
					disconnected.						If not : NG.
							Bad internal connection.
							Faulty terminal caulking (Cu wire is cut).
							Bad soldering.
		No electric power on compressor. - Faulty compressor.
		Faulty PTC.			Power does not conduct. - Damage.						■ Check the resistance of both
					Bad characteristics. - Initial resistance is big.						terminals.
					Bad connection with			Too loose.			At normal temperature 6 :
					compressor.			Assembly is not possible.			OK.
					Bad terminal connection.						If disconnected : ∞.
	4) During defrost.
						Start automatic defrost.
						Cycle was set at defrost when the refrigerator
						was produced.

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