LG Electronics GR-P257/L257 Faults, Power, Compressor, Problems Causes Checks Measures Remarks

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2. Faults

2-1. Power

Problems

Causes

Checks

Measures

Remarks

No power on

- Power cord cut.

- Check the voltage with tester.

-Replace the components.

outlet.

- Faulty connector insertion.

- Check visually.

-Reconnect the connecting parts.

- Faulty connection between plug

- Check visually.

- Reconnect the connecting parts.

and adapter.

Fuse blows out.

- Short circuit by wrong connection.

- Check the fuse with tester

- Find and remove the cause of

- Replace with rated

- Low voltage products are

or visually.

problem(ex. short, high voltage,

fuse after confirming

connected to high voltage.

- Check the input volt are with tester

low voltage).

its specification.

- Short circuit by insects.

(between power cord and products).

- Replace with rated fuse.

- Electricity leakage.

- Check the resistance of power cord

■ If fuse blowns out

- High voltage.

with testerf (if it is 0Ω, it is shorted).

frequently, reconfirm

- Short circuit of components

the cause and prevent.

-

(tracking due to moisture and dust

55 -

penetration).

2-2. Compressor

Problems

Causes

Checks

Measures

Remarks

Compressor

- Faulty PTC.

- Check the resistance.

- If resistance is infinite, replace it

does not

Vlaue:∞ is defective.

with new one.

operate.

- If it is not infinite, it is normal.

- Check other parts.

- Compressor is frozen.

- If compressor assembly parts are

- During forced operation:

normal(capacitor, PTC, OLP),

- Operates: Check other parts.

apply power directly to the

- Not operate: Replace the frozen

compressor to force operation.

compressor with new one, weld,

Auxiliary winding

evacuate, and recharge refrigerant.

Main winding

Power

OLP

It starts as soon as it is

• Refer to weld repair procedures.

contacted.

TROUBLE DIAGNOSIS

Image 57

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 RefrigeratorHow to Install Water Pipe Before InstallationClass Shape and Spec Nomenclature Single Lever Type Faucet general Connection of Pipe Connector a and BTwo Hands Type Faucet General TypeWhen customer uses bottled water Filter CleaningOutternal 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 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 FreezerSuper freezing Miracle Zone functionControl of variable type of freezing room fan 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/L227Reset circuit Oscillation 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 circuitSwitch entry circuit Option designation circuit model separation functionSeparation 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 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 Problems Causes Defrosting failureMeasures 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 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 RepairBrazing Reference Drawings Asia / Middle-East AfricaEurope & CIS / America 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