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

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2-3. Temperature

Problems	Causes	Checks	Measures	Remarks

High	Poor cool air circulation due to faulty	- Lock –– Check resistance with a	- Replace fan motor.
temperature	fan motor.	tester.
in the freezer		0Ω: short.
compartment.		∞Ω: cut.	- Reconnect and reinsert.
		- Rotate rotor manually and check
		rotation.
		- Wire is cut.
		- Bad terminal contact: Check	- Maintain clearance and remove ice
		terminal visually.	(Repair and/or replace shroud if fan
		- Fan constraint. – Fan shroud	is constrained by shroud
		contact: Confirm	deformation).
		visually.
		– Fan icing:
		Confirm visually.

	Faulty fan motor due to faulty door	- Iced button (faulty) operation:	- Confirm icing causes and repair.
	switch operation.	Press button to check	- Replace door switch.
		- Faulty button pressure and contact:
		Press button to check operation.
		- Door cannot press door switch	- Door sag: fix door.
		button: Check visually.	- Door liner bent:replace door or
			attach sheets.

	Bad radiation conditions in	- Check the clearance between the	- Keep clearance between	- The fan may be
	compressor compartment.	refrigerator and wall (50 mm in	refrigerator and walls (minimum	broken if cleaning
		minimum).	50mm).	performs while the
		- Check dust on the grill in	- Remove dust and contaminants	refrigerator is on.
		compressor compartment.	from grill for easy heat radiation.
		- Check dust on the coils condenser.	- Remove the dust with vacuum
			cleaner from the coils condenser
			while the refrigerator is off.

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 RefrigeratorBefore Installation How to Install Water PipeClass Shape and Spec Nomenclature Two Hands Type Faucet Connection of Pipe Connector a and BSingle Lever Type Faucet general General TypeFilter Cleaning When customer uses bottled waterOutternal 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 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 FreezerMiracle Zone function Super freezingControl of variable type of freezing room fan 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/L227Oscillation circuit Reset 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 OpenOption designation circuit model separation function Switch entry circuitSeparation 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 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 Defrosting failure Problems CausesMeasures 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 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 12-0mmAsia / Middle-East Africa Brazing Reference DrawingsEurope & CIS / America 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