LG Electronics GR-P257/L257, GR-P227/L227 Standard Regulations For Heavy Repair, 12-0mm

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TROUBLE DIAGNOSIS

Items

Precautions

Evaporator

Compressor

Drier

Condenser

Bombe

4) Refrigerant Charging

Charge refrigerant while operating a compressor as shown above.

5)Pinch a charging pipe with a pinch-off plier after completion of charging.

6)Braze the end of a pinched charging pipe with copper brazer and take a gas leakage test on the welded parts.

6.	Gas-leakage test	* Take a leakage test on the welded or suspicious area with an electronic leakage tester.
7.	Pipe arrangement	Check each pipe is placed in its original
	in each cycle	place before closing a cover back-M/C
		after completion of work. Particularly
		control the size of Joint Drain Pipe

3-5. Standard Regulations For Heavy Repair

1) Observe the safety precautions for gas handling.

2) Use JIG (or wet towel) in order to prevent electric wires from burning during welding. (In order to prevent insulation break and accident.)

3) The inner case shall be melted and insulation material (polyurethane) shall be burnt if not cared during welding inner case parts.

4) The copper pipe shall be oxidized by overheating if not cared during welding.

5) Not allow the aluminum pipes to contact to copper pipes. (In order to prevent corrosion.)

6) Observe that the inserted length of a capillary tube into a drier should be 12 +3 mm.

-0

	Drier
Molecular	Molecular Pipe
Molecular
Sieves

+3

12-0mm

7)Make sure that the inner diameter should not be distorted while cutting a capillary tube.

8)Be sure that a suction pipe and a filling tube should not be substituted each other during welding. ( High efficiency pump.)

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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