LG Electronics GR-P227/L227, GR-P257/L257 service manual Contents

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CONTENTS

WARNINGS AND PRECAUTIONS FOR SAFETY	3
SPECIFICATIONS	4
PARTS IDENTIFICATION	6
HOW TO INSTALL THE REFRIGERATOR	10
HOW TO ADJUST DOOR HEIGHT OF THE REFRIGERATOR	10
HOW TO INSTALL WATER PIPE	11
HOW TO CONTROL THE AMOUNT OF WATER SUPPLIED TO THE ICEMAKER	15
MICOM FUNCTION	16
EXPLATION FOR MICOM CIRCUIT	26
EXPLANATION FOR PWB CIRCUIT	26
ICE MAKER AND DISPENSER OPERATION PRINCIPLE AND REPAIR METHOD	41
OPERATION PRINCIPLE	41
ICEMAKER FUNCTIONS	42
DEFECT DIAGNOSIS FUNCTION	43
CIRCUIT	44
TROUBLE DIAGNOSIS	45
TROUBLE SHOOTING	45
FAULTS	55
COOLING CYCLE HEAVY REPAIR	72
HOW TO DEAL WITH CLAIMS	79
HOW TO DISASSEMBLE AND ASSEMBLE	84
DOOR	84
HANDLE	85
SHROUD, GRILLE FAN	85
WATER VALVE DISASSEMBLY METHOD	86
FAN AND FAN MOTOR DISASSEMBLY METHOD	86
DISPENSER	87
EXPLODED VIEW	89

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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 RefrigeratorClass Shape and Spec Nomenclature How to Install Water PipeBefore Installation Two Hands Type Faucet Connection of Pipe Connector a and BSingle Lever Type Faucet general General TypeOutternal Filter Filter Fixation When customer uses bottled waterFilter Cleaning 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 FreezerControl of variable type of freezing room fan Super freezingMiracle Zone function 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/L227GR-P227/L227/P257/L257 Reset circuitOscillation circuit Load/dispenser operation, door opening circuit Load Driving CircuitLever Switch sensing circuit Measuring part Dispenser operation circuitDoor opening sensing circuit Temperature sensing circuit Short OpenSeparation Connection Status Application Standard Switch entry circuitOption designation circuit model separation function 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 Measures Remarks Problems CausesDefrosting failure 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 12-0mmEurope & CIS / America Brazing Reference DrawingsAsia / Middle-East Africa 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