LG Electronics GR-P227/L227, GR-P257/L257 service manual Remove the parts and replace it

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Problems	Causes	Checks	Measures	Remarks

No defrosting	Melting fuse blows out.	- Check melting fuse with tester. -	Faullty parts: parts replacement.
	1) Lead wire is cut.	If 0Ω: OK.	- Check wire color when maeasuring
	2) Bad soldering.	If ∞Ω: wire is cut.	resistance with a tester.

	Ice in the Sucking duct.	1. Check the inner duct with mirror.	1) Turn power off.
	1) Icing by foreign materials in the		2) Raise the front side(door side),
	duct.		support the front side legs, and let
	2) Icing by cool air inflow through		the ice melt naturally. (If power is
	the gap of heater plate.		on, melt the frost by forced
	3) Icing by the gap of heater plate.		defrosting.)
		2. Check by inserting soft copper	3) Reassemble the heater plate.
		wire into the duct (soft and thin
		copper not to impair heating wire).

	Bad cool air inflow and discharge,	1. Turn on power, open or close the	1) Check the faulty connector of
	and bad defrosting due to faulty	door, check that motor fan	housing and reassemble wrongly
	contact and insertion (bad connector	operates (If it operates, motor fan	assembled parts.
	insertion into housing of heater,	is OK).	2) If the parts are very damaged,
	melting, fuse and motor fan).	2. Disconnect parts in the refrigerator	remove the parts and replace it
		compartment, check the connection	with a new one.
		around the housing visually,
		defrost, and confirm heat generation
		on the heater. Do not put hands on
		the sheath heater.
		3. Check the parts which have faults
		described in 1, 2 (mechanical
		model: disconnect thermostat
		from the assembly).

TROUBLE DIAGNOSIS

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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 RefrigeratorClass Shape and Spec Nomenclature How to Install Water PipeBefore Installation Two Hands Type Faucet Connection of Pipe Connector a and BSingle Lever Type Faucet general General TypeOutternal Filter Filter Fixation When customer uses bottled waterFilter Cleaning 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 icemakerMicom Function Door Alarm Buzzer Mute ModeDisplay Power saving Mode Monitor PanelExhibition Mode Description of FunctionLock function display button lock Outside temperature display functionLCD Back Light Control Filter condition display functionAutomatic ice maker When ice maker does not operate smoothlyDispenser use selection Express FreezerControl of variable type of freezing room fan Super freezingMiracle Zone function Doors of freezing Door opening alarmControl of M/C room fan motor 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-inExplanation for PWB circuit Power circuitExplation for Micom Circuit GR-P227/L227GR-P227/L227/P257/L257 Reset circuitOscillation circuit Load/dispenser operation, door opening circuit Load Driving CircuitLever Switch sensing circuit Measuring part Dispenser operation circuitDoor opening sensing circuit Temperature sensing circuit Short OpenSeparation Connection Status Application Standard Switch entry circuitOption designation circuit model separation function 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 Fill/Park Position Harvest ModeIcemaking Mode 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 Problems Causes Checks Measures Remarks FaultsPower Problems Causes Checks MeasuresTemperature Cooling Disconnected from the motor Refer to fan motor disassembly Measures Remarks Problems CausesDefrosting failure 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 PrecautionsPractical Work For Heavy Repair When replacing a drierWhen replacing a compressor Inserting a capillary tubeCharging sequence Pipe ConnectionVacuum Sequence Calculation of amount of refrigerant chargedStandard Regulations For Heavy Repair 12-0mmEurope & CIS / America Brazing Reference DrawingsAsia / Middle-East Africa Sound depends on the installation location Problems Checks and MeasuresExplain the principles of temperature change Explain general principles of soundsExplain the characteriistics of moving parts Explain the procedure and principles of ice maker operationExplain the flow of refrigerant Explain the principles of water supplied to dispenserMeasures for Symptoms on Temperature Explain the basic principles of food odor Check the temperature control button and set at strongOdor and Frost 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