LG Electronics GR-P227/L227, GR-P257/L257 Pipe Connection, Vacuum Sequence, Charging sequence

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TROUBLE DIAGNOSIS

Items

Precautions

 

4.Vacuum degassing.

Evaporator

 

 

 

 

Suction pipe

 

 

Compressor

 

 

Drier

 

 

Condenser

 

 

3

 

 

2

1

 

Low

 

 

pressure

High

 

Blue

pressure

 

Yellow

 

 

 

Red

 

Vaccum

KEYPOINTING

 

Pump

 

 

- If power is applied

 

 

during vacuum

 

 

degassing, vacuum

 

 

degassing shall be

Pipe Connection

more effective.

- Operate compressor

Connect a red hose to the high pressure side and a blue hose to the

while charging

 

 

low pressure side.

refrigerant. (It is

Vacuum Sequence

easier and more

certain to do like

Open ,

valves and evacuate for 40 minutes. Close valve .

this.)

5.Refrigerant charging.

Charging sequence

1)Check the amount of refrigerant supplied to each model after completing vacuum degassing.

2)Evacuate bombe with a vacuum pump.

3)Measure the amount of refrigerant charged.

-Measure the weight of an evacuated bombe with an electronic scale.

-Charge refrigerant into a bombe and measure the weight. Calculate the weight of refrigerant charged into the bombe by subtracting the weight of an evacuated bombe.

 

 

 

 

 

 

Indicate the weight of

KEYPOINTING

 

 

 

 

 

 

 

 

 

 

 

 

an evacuated bombe

- Be sure to charge

 

 

 

 

 

 

 

 

 

the refrigerant at

R134a

 

 

around 25°C.

 

 

- Be sure to keep -5g in the winer and +5g in summer

Calculation of amount of refrigerant charged

the amount of refrigerant charged= a weight after charging - a weight before charging (a weight of an evacuated cylinder)

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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 Two Hands Type Faucet Connection of Pipe Connector a and BSingle Lever Type Faucet general 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 icemakerMicom Function Door Alarm Buzzer Mute ModeDisplay Power saving Mode Monitor PanelExhibition Mode Description of FunctionLock function display button lock Outside temperature display functionLCD Back Light Control Filter condition display functionAutomatic ice maker When ice maker does not operate smoothlyDispenser use selection Express FreezerSuper freezing Miracle Zone functionControl of variable type of freezing room fan Doors of freezing Door opening alarmControl of M/C room fan motor 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-inExplanation for PWB circuit Power circuitExplation for Micom 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 Fill/Park Position Harvest ModeIcemaking Mode 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 Problems Causes Checks Measures Remarks FaultsPower 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 PrecautionsPractical Work For Heavy Repair When replacing a drierWhen replacing a compressor Inserting a capillary tubeCharging sequence Pipe ConnectionVacuum Sequence Calculation of amount of refrigerant chargedStandard Regulations For Heavy Repair 12-0mmBrazing Reference Drawings Asia / Middle-East AfricaEurope & CIS / America Sound depends on the installation location Problems Checks and MeasuresExplain the principles of temperature change Explain general principles of soundsExplain the characteriistics of moving parts Explain the procedure and principles of ice maker operationExplain the flow of refrigerant Explain the principles of water supplied to dispenserMeasures for Symptoms on Temperature Explain the basic principles of food odor Check the temperature control button and set at strongOdor and Frost 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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