LG Electronics GR-P227/L227, GR-P257/L257 service manual Not performed Evaporator by heating as

Page 48

TROUBLE DIAGNOSIS

CLAIMS.

 

 

 

 

 

 

 

 

 

CAUSES AND CHECK POINTS.

HOW TO CHECK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. No cooling.

2) Refrigeration system is clogged.

 

 

 

 

 

 

 

 

 

 

 

■ Check the clogged

 

 

 

 

Moisture

 

 

 

Residual moisture

 

 

 

 

Air Blowing.

 

 

Not performed.

evaporator by heating (as

 

 

 

 

 

 

 

 

 

 

 

 

 

soon as the cracking sound

 

 

 

 

clogged.

 

 

 

in the evaporator.

 

 

 

 

 

 

 

 

Too short.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

begins, the evaporator start

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Impossible moisture

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

freezing)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

confirmation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low air pressure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Leave it in the air.

 

 

 

During rest time.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Caps are missed.

 

 

 

After work.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Residual moisture.

 

 

 

 

Not dried in the compressor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Elapsed more than 6 months after drying

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Caps are missed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Insufficient drier

 

 

 

 

 

 

No pressure when it is open.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

No electric

 

 

 

 

 

 

 

 

 

Dry drier - Drier temperature.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

power on

 

 

 

capacity.

 

 

 

 

 

 

Leave it in the air.

 

 

 

Check on package

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

therm-

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

condition.

 

 

 

 

 

ostat.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Good storage after

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

finishing.

 

 

 

 

 

 

 

 

 

Residual moisture

 

 

 

 

 

Caps are missed.

 

 

 

 

During transportation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

in pipes.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

During work.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Air blowing.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Not performed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Performed.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Too short time.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low air pressure.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Less dry air.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Moisture penetration - Leave it in the air. - Moisture penetration.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

into the refrigeration oil.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

■ The evaporator does not cool

 

 

 

 

Weld joint

 

 

 

Short pipe insert.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

from the beginnig (no evidece

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pipe gaps.

 

 

Too large.

 

 

 

 

 

 

 

 

 

 

 

of misture attached).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

clogged.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Damaged pipes.

 

 

 

 

 

 

 

 

 

 

 

The evaporator is the same

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Too much solder.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

as before even heat is

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

applied.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Drier cloggeing.

 

The capillary tube inserted depth. - Too much.

 

 

 

 

 

 

 

 

 

 

 

 

Capillary tube melts. - Over heat.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Clogged with foreign materials.

 

 

 

Desiccant powder.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Weld oxides.

Drier angle.

Reduced cross section by cutting. - Squeezed.

Foreign material clogging.

 

 

Compressor cap is disconnected.

 

 

 

Foreign materials are in the pipe.

 

 

 

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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 RefrigeratorHow to Install Water Pipe Before InstallationClass Shape and Spec Nomenclature Connection of Pipe Connector a and B Single Lever Type Faucet generalTwo Hands Type Faucet General TypeWhen customer uses bottled water Filter CleaningOutternal 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 icemakerDoor Alarm Buzzer Mute Mode Display Power saving ModeMicom Function Monitor PanelExhibition Mode Description of FunctionOutside temperature display function LCD Back Light ControlLock function display button lock Filter condition display functionWhen ice maker does not operate smoothly Dispenser use selectionAutomatic ice maker Express FreezerSuper freezing Miracle Zone functionControl of variable type of freezing room fan Door opening alarm Control of M/C room fan motorDoors of freezing 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-inPower circuit Explation for Micom CircuitExplanation for PWB circuit GR-P227/L227Reset circuit Oscillation 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 OpenSwitch 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 Harvest Mode Icemaking ModeFill/Park Position 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 Faults PowerProblems 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 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 PrecautionsWhen replacing a drier When replacing a compressorPractical Work For Heavy Repair Inserting a capillary tubePipe Connection Vacuum SequenceCharging sequence Calculation of amount of refrigerant chargedStandard Regulations For Heavy Repair 12-0mmBrazing Reference Drawings Asia / Middle-East AfricaEurope & CIS / America Problems Checks and Measures Explain the principles of temperature changeSound depends on the installation location Explain general principles of soundsExplain the procedure and principles of ice maker operation Explain the flow of refrigerantExplain the characteriistics of moving parts Explain the principles of water supplied to dispenserMeasures for Symptoms on Temperature Check the temperature control button and set at strong Odor and FrostExplain the basic principles of food odor 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
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