LG Electronics GR-P257/L257, GR-P227/L227 service manual Bad soldering Bad rivet contact Short

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TROUBLE DIAGNOSIS

CLAIMS.

CAUSES AND CHECK POINTS.

HOW TO CHECK

8. Faulty lamp

1) Lamp problem.

Filament blows out.

(freezer and

Glass is broken.

refrigerator

2) Bad lamp assembly.

Not inserted.

compartment).

3) Bad lamp socket.

Loosened by vibration.

Disconnection.

Bad soldering.

Bad rivet contact.

Short.

Water penetration.

Low water

level

in tray.

Bad elasticity of contact.

Bad contact(corrosion).

4) Door switch.

Its own defect.

Refrigerator and freezer switch is reversed.

Travlel distance.

Bad connection.

Bad terminal contact.

P/U liquid leak..

9. Faulty internal

1) Lead wire is damaged.

■ Connect conduction and

voltage(short).

Wire damage when assembling P.T.C. Cover.

non-conduction parts and

Outlet burr in the bottom plate.

check with tester.

Pressed by cord heater. lead wire, evaporator pipe.

Conduction: NG.

2) Exposed terminal.

Resistance∞: OK.

Compressor Compartment terminal. - Touching other

components.

Freezer compartment terminal. - Touching evaporator pipe.

3) Faulty parts.

Transformer.

Coil contacts cover.

Welded terminal parts contact cover.

Compressor.

Bad coil insulation.

Plate heater.

Melting fuse.

Sealing is broken.

Moisture penetration.

Cord heater.

Pipe damaged.

Moisture penetration.

Sheath heater.

Bad sealing.

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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 RefrigeratorBefore Installation How to Install Water PipeClass Shape and Spec Nomenclature General Type Connection of Pipe Connector a and BSingle Lever Type Faucet general Two Hands Type FaucetFilter Cleaning When customer uses bottled waterOutternal Filter Filter Fixation 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 makerMiracle Zone function Super freezingControl of variable type of freezing room fan 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 circuitOscillation circuit Reset circuitGR-P227/L227/P257/L257 Load Driving Circuit Load/dispenser operation, door opening circuitDispenser operation circuit Lever Switch sensing circuit Measuring partDoor opening sensing circuit Short Open Temperature sensing circuitOption 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 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 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 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 RepairAsia / Middle-East Africa Brazing Reference DrawingsEurope & CIS / America 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