LG Electronics GR-P257/L257, GR-P227/L227 service manual Motor damper

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Problems	Symptom		Causes		Checks	Measures	Remarks

Bad cooling	Wrong		Defective Step Motor	Check Step Motor	Check if Step Motor damper	Reconnect lead
	Refrigerator		Damper.	damper motor and	motor and reed switch lead	wire.
	temperature.			reed switch and lead	wire are cut with a tester.

				wire are cut. Check	Refer to Step Motor damper	Replace Step Motor
				Step Motor damper	in parts repair guide.	damperor refrigerator
				part.		control box Assembly.

				Check Step Motor	Refer to Step Motor damper	Replace relay or	Refer to single
				damper Motor driving	in parts repair guide.	PCB.	motor damper
				relay in PCB.			driving circuits
							in circuit
							explanation.

				Foreign materials in Step	Check Step Motor damper	Remove foreign
				Motor damper baffles.	baffle visually.	materials.

				Ice formation on	Check if Step Motor damper	Replace Step Motor
				Step Motor damper	Heater wire is cut with a	damper or refrigerator
				baffles.	tester.	control Box Assembly.

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

				Refrigerator sensor is	Check the sensor color in the	Repair main PCB
				substituted for other	circuit. (main PCB sensor	sensor housing.
				sensor.	housing.)

				Defective refrigerator	Check if refrigerator sensor	Fix again the
				sensor assembly	is not fixed at cover sensor but	refrigerator sensor.
				condition.	inner case visually.

TROUBLE DIAGNOSIS

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Contents Refrigerator Contents Page Front View SpecificationsRef No. GR-L227 Ref No. GR-P257 Ref No. GR-L257 Freezer Refrigerator compartment compartment Parts IdentificationRef No. GR-P227/GR-P257EXTERNAL Filter Parts Identification Parts Identification How to Adjust Door Height of Refrigerator HOW to Install RefrigeratorClass Shape and Spec Nomenclature How to Install Water PipeBefore Installation General Type Connection of Pipe Connector a and BSingle Lever Type Faucet general Two Hands Type FaucetOutternal Filter Filter Fixation When customer uses bottled waterFilter Cleaning Replacement of water filter After installing water filterConfirm the amount of water supplied to the icemaker How to Control the Amount of Water Supplied to IcemakerMonitor Panel Door Alarm Buzzer Mute ModeDisplay Power saving Mode Micom FunctionDescription of Function Exhibition ModeFilter condition display function Outside temperature display functionLCD Back Light Control Lock function display button lockExpress Freezer When ice maker does not operate smoothlyDispenser use selection Automatic ice makerControl of variable type of freezing room fan Super freezingMiracle Zone function Or home bar Door opening alarmControl of M/C room fan motor Doors of freezingSequential operation of built-in product Failure Diagnosis Function Test Function Mode Operation Contents RemarksFunction of dispenser and water dispenser built-in Test Mode 1 Status LCD Test Mode 2 Status LCDGR-P227/L227 Power circuitExplation for Micom Circuit Explanation for PWB circuitGR-P227/L227/P257/L257 Reset circuitOscillation circuit Load Driving Circuit Load/dispenser operation, door opening circuitDispenser operation circuit Lever Switch sensing circuit Measuring partDoor opening sensing circuit Short Open Temperature sensing circuitSeparation 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 Water supply amount Table Harvest ModeIcemaking Mode Fill/Park PositionDefect diagnosis function Stage Items Indicator RemarksCircuit Trouble Diagnosis Trouble ShootingNot 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 FaultsPower Problems Causes Checks Measures RemarksTemperature 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 Micom Problems Symptom Causes Checks Measures RemarksDriving circuits Motor damper Replace door switch Trouble Diagnosis Items Unit Standards Purposes Remarks Cooling Cycle Heavy RepairSummary Of Heavy Repair Process Contents ToolsItems Precautions Precautions During Heavy RepairInserting a capillary tube When replacing a drierWhen replacing a compressor Practical Work For Heavy RepairCalculation of amount of refrigerant charged Pipe ConnectionVacuum Sequence Charging sequence12-0mm Standard Regulations For Heavy RepairEurope & CIS / America Brazing Reference DrawingsAsia / Middle-East Africa Explain general principles of sounds Problems Checks and MeasuresExplain the principles of temperature change Sound depends on the installation locationExplain the principles of water supplied to dispenser Explain the procedure and principles of ice maker operationExplain the flow of refrigerant Explain the characteriistics of moving partsMeasures for Symptoms on Temperature Explain the basic principles of frost formation Check the temperature control button and set at strongOdor and Frost Explain the basic principles of food odorOthers Remove a freezer door HOW to Disassemble and AssembleHandle InsertTubeLineColletClip Assembly COVER, Dispenser Exploded View Optional part Ref No. GR-P227/GR-P257Ref No. GR-L227/GR-L257 Freezer Compartment Optional part Refrigerator CompartmentMachine Compartment ICE & Water Part Dispenser Part No JD8999A