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

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2-7. Sound

Problems	Causes		Checks		Measures	Remarks

"Whizz" sound	1. Loud sound of compressor	1.1 Check the level of the		1)	Maintain horizontal level.
	operation.		refrigerator.	2)	Replace rubber and seat if they
		1.2	Check the rubber seat		are sagged and aged.
			conditions (sagging and aging).	3)	Insert rubber where hand contact
					reduces noise in the pipe.
					reduces noise in the pipe.
	2. Pipes resonat sound which is	2.1 Check the level of pipes		4)	Avoid pipe interference.
	connected to the compressor.		connected to the compressor	5)	Replace defective fan and fan
			and their interference.		motor.
		2.2	Check rubber inserting	6)	Adjust fan to be in the center of
			conditions in pipes.		bell mouth of the fan guide.
		2.3	Touch pipes with hands or screw	7)	Leve a clearance between
			-driver (check the change of		interfering parts and seal gaps in
			sound).		the structures.
				8)	Reassemble the parts which make
				8)	Reassemble the parts which make
	3. Fan operation sound in the freezer	3.1 Check fan insertion depth and			sound.
	compartment.		blade damage.	9)	Leave a clearance if evaporator
		3.2	Check the interference with		pipes and suction pipe touch
			structures.		freezer shroud.
		3.3	Check fan motor.
		3.4	Check fan motor rubber insertion
			and aging conditions.

	4. Fan operation sound in the	4.1 Same as fan confirmation in the
	compressor compartment.		refrigerator.
		4.2	Check drip tray leg insertion.
		4.3	Check the screw fastening
			conditions at condenser and
			drip tray.

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 Single Lever Type Faucet general Connection of Pipe Connector a and BTwo Hands Type Faucet General TypeOutternal 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 IcemakerDisplay Power saving Mode Door Alarm Buzzer Mute ModeMicom Function Monitor PanelDescription of Function Exhibition ModeLCD Back Light Control Outside temperature display functionLock function display button lock Filter condition display functionDispenser use selection When ice maker does not operate smoothlyAutomatic ice maker Express FreezerControl of variable type of freezing room fan Super freezingMiracle Zone function Control of M/C room fan motor Door opening alarmDoors of freezing Or home barSequential 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 LCDExplation for Micom Circuit Power circuitExplanation for PWB circuit GR-P227/L227GR-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 Icemaking Mode Harvest ModeFill/Park Position Water supply amount TableDefect 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 Power FaultsProblems Causes Checks Measures Remarks 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 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 RepairWhen replacing a compressor When replacing a drierPractical Work For Heavy Repair Inserting a capillary tubeVacuum Sequence Pipe ConnectionCharging sequence Calculation of amount of refrigerant charged12-0mm Standard Regulations For Heavy RepairEurope & CIS / America Brazing Reference DrawingsAsia / Middle-East Africa Explain the principles of temperature change Problems Checks and MeasuresSound depends on the installation location Explain general principles of soundsExplain the flow of refrigerant Explain the procedure and principles of ice maker operationExplain the characteriistics of moving parts Explain the principles of water supplied to dispenserMeasures for Symptoms on Temperature Odor and Frost Check the temperature control button and set at strongExplain the basic principles of food odor Explain the basic principles of frost formationOthers 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