LG Electronics GR-P227/L227, GR-P257/L257 service manual Replace door switch

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	Problems	Symptom		Causes	Checks	Measures	Remarks

	Bad defrost.	Defrost is not		Defrost lead wire is cut.	Check if defrost lead wire is cut with a	Reconnect Lead
		working.			tester.	Wire.

				Defective defrost driving relay.	Check the voltage of CON2 (1 and 7)	Replace relay (RY 7	Refer to load
					with a tester after pressing main	and RY 3) or PCB.	driving conditions
					PCB test switch twice.		check in circuit
					If the voltage is normal then it is OK.		explanation.

				Defective defrost sensor parts.	Check the resistance of defrost sensor	Replace defrost	Refer to sensor
					with a tester.	sensor.	resistance
							characteristic
							table of circuit
							explanation.

	Defective	Buzzer		Defective connecting lead wire from	Check lead wire related to door	Repair lead wire.
-	buzzer	continuously		main PCB to door switch.	switch with a tester.
70
70		rings or door		Defective door switch parts.	Refer to door switch in parts repair	Replace door switch.
-		rings or door		Defective door switch parts.	Refer to door switch in parts repair	Replace door switch.
-
		opening alarm			guide.
		does not work.

	Defective	Buzzer does		Key input wire is cut or bad connector	Check input wire with a tester.	Reconnect lead	Refer to display
	display button	not ring and		terminal contact in main PCB and		wire and replace or	circuit in circuit
		key does not		display PCB connecting lead wire.		directly connect bad	explanation.
		sense even				contact terminal to
		button is				lead wire.
		pressed.

				Key is continuously depressed due to	Disassemble frame display and confirm	Adjust or replace
				structural interference.	visually.	interfering
						structures.

TROUBLE DIAGNOSIS

Image 72

Contents Refrigerator Contents Page Specifications Front ViewRef No. GR-L227 Ref No. GR-P257 Ref No. GR-L257 Parts Identification Freezer Refrigerator compartment compartmentRef No. GR-P227/GR-P257EXTERNAL Filter Parts Identification Parts Identification HOW to Install Refrigerator How to Adjust Door Height of RefrigeratorHow to Install Water Pipe Before InstallationClass Shape and Spec Nomenclature Connection of Pipe Connector a and B Single Lever Type Faucet generalTwo Hands Type Faucet General TypeWhen customer uses bottled water Filter CleaningOutternal Filter Filter Fixation After installing water filter Replacement of water filterHow to Control the Amount of Water Supplied to Icemaker Confirm the amount of water supplied to the icemakerDoor Alarm Buzzer Mute Mode Display Power saving ModeMicom Function Monitor PanelExhibition Mode Description of FunctionOutside temperature display function LCD Back Light ControlLock function display button lock Filter condition display functionWhen ice maker does not operate smoothly Dispenser use selectionAutomatic ice maker Express FreezerSuper freezing Miracle Zone functionControl of variable type of freezing room fan Door opening alarm Control of M/C room fan motorDoors of freezing Or home barSequential operation of built-in product Failure Diagnosis Function Mode Operation Contents Remarks Test FunctionTest Mode 1 Status LCD Test Mode 2 Status LCD Function of dispenser and water dispenser built-inPower circuit Explation for Micom CircuitExplanation for PWB circuit GR-P227/L227Reset circuit Oscillation circuitGR-P227/L227/P257/L257 Load/dispenser operation, door opening circuit Load Driving CircuitLever Switch sensing circuit Measuring part Dispenser operation circuitDoor opening sensing circuit Temperature sensing circuit Short OpenSwitch entry circuit Option designation circuit model separation functionSeparation Connection Status Application Standard Stepping motor operation circuit Fan motor driving circuit freezer, mechanical area +5 C +9F 33 k Ω 56 k Ω JCR1 Main PCB Sensor resistance characteristics table Miracle Zone Stepping Motor / Display Operation Principle Harvest Mode Icemaking ModeFill/Park Position Water supply amount TableStage Items Indicator Remarks Defect diagnosis functionCircuit Trouble Shooting Trouble DiagnosisNot performed Evaporator by heating as Refrigeration Refrigeration Residual Refrigeration No cooling air circulation Is weak Fan does not work Recess Sounds Compressor compartment operating sounds Bad soldering Bad rivet contact Short Structure Door foam Appearance Sag Faults PowerProblems Causes Checks Measures Remarks Problems Causes Checks MeasuresTemperature Cooling Disconnected from the motor Refer to fan motor disassembly Problems Causes Defrosting failureMeasures Remarks Remove the parts and replace it Icing Discharging port of cooling air Sound Click Contraction of evaporator Sources Sound Burping It happens when refrigerant expands Odor Problems Symptom Causes Checks Measures Remarks MicomDriving circuits Motor damper Replace door switch Trouble Diagnosis Cooling Cycle Heavy Repair Items Unit Standards Purposes RemarksProcess Contents Tools Summary Of Heavy RepairPrecautions During Heavy Repair Items PrecautionsWhen replacing a drier When replacing a compressorPractical Work For Heavy Repair Inserting a capillary tubePipe Connection Vacuum SequenceCharging sequence Calculation of amount of refrigerant chargedStandard Regulations For Heavy Repair 12-0mmBrazing Reference Drawings Asia / Middle-East AfricaEurope & CIS / America Problems Checks and Measures Explain the principles of temperature changeSound depends on the installation location Explain general principles of soundsExplain the procedure and principles of ice maker operation Explain the flow of refrigerantExplain the characteriistics of moving parts Explain the principles of water supplied to dispenserMeasures for Symptoms on Temperature Check the temperature control button and set at strong Odor and FrostExplain the basic principles of food odor Explain the basic principles of frost formationOthers HOW to Disassemble and Assemble Remove a freezer doorHandle InsertTubeLineColletClip Assembly COVER, Dispenser Exploded View Ref No. GR-P227/GR-P257 Optional partRef No. GR-L227/GR-L257 Freezer Compartment Refrigerator Compartment Optional partMachine Compartment ICE & Water Part Dispenser Part No JD8999A