Manuals / LG Electronics / Kitchen Appliance / Refrigerator

LG Electronics GR-P257/L257 Circuit, GR-P227/L227/P257/L257GR-P227/L227/P257/L257

Models: GR-P257/L257 GR-P227/L227

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CIRCUIT

(1) GR-P227/L227/P257/L257GR-P227/L227/P257/L257

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LG Electronics GR-P257/L257 service manual Circuit, GR-P227/L227/P257/L257GR-P227/L227/P257/L257

Contents

REFRIGERATOR http//eic.lgservice.comSERVICE MANUAL MODEL GR-P227/L227 GR-P257/L257SPECIFICATIONS CONTENTSWARNINGS AND PRECAUTIONS FOR SAFETY HOW TO INSTALL THE REFRIGERATORWARNINGS AND PRECAUTIONS FOR SAFETY SPECIFICATIONS SPECIFICATIONS1. Ref No. GR-P227 SPECIFICATIONSSPECIFICATIONS 2. Ref No. GR-L227SPECIFICATIONS SPECIFICATIONSSPECIFICATIONS 1. Ref No. GR-P257SPECIFICATIONS SPECIFICATIONSSPECIFICATIONS 2. Ref No. GR-L257SPECIFICATIONS SPECIFICATIONS1. Ref No. GR-P227/GR-P257 INTERNAL FILTER PARTS IDENTIFICATIONFreezer Refrigerator compartment compartment Freezer Refrigerator compartment compartment 2. Ref No. GR-P227/GR-P257 EXTERNAL FILTERPARTS IDENTIFICATION Cover PWBPARTS IDENTIFICATION 3. Ref No. GR-P227/GR-P257 INTERNAL FILTERFreezer Refrigerator compartment compartment PARTS IDENTIFICATION 4. Ref No. GR-P227/GR-P257 EXTERNAL FILTERFreezer Refrigerator compartment compartment 1. If the height of freezer door is lower than that of HOW TO INSTALL REFRIGERATOR1. How to Adjust Door Height of Refrigerator 2. If the height of freezer door is higher than that ofBefore Installation 2. How to Install Water PipeHOW TO INSTALL REFRIGERATOR 2-1. When connecting directly to the water tapHot Water HOW TO INSTALL REFRIGERATOR1. Connection of Pipe Connector A and B Cold Water2. Filter Cleaning HOW TO INSTALL REFRIGERATOR3. When customer uses bottled water Outternal Filter 1. Filter FixationBefore Installing water filter HOW TO INSTALL REFRIGERATORInstall Water Filter Applicable to some models only Installing water filter 1. Initial installation of water filter3-1. Confirm the amount of water supplied to the icemaker 3. How to Control the Amount of Water Supplied to IcemakerHOW TO INSTALL REFRIGERATOR 1-2. Display Second Function MICOM FUNCTION1. Monitor Panel 1. Door Alarm Buzzer Mute ModePower Initially On 2. Description of Function2-1-1. Funnction of Temperature Selection MICOM FUNCTION2-1-2. LCD Back Light Control 2-1-3. Outside temperature display functionMICOM FUNCTION 2-1-4. Lock function display button lock2-3. Automatic ice maker 2-4. When ice maker does not operate smoothly2-2. Dispenser use selection 2-5. Express Freezer2-9. Control of variable type of freezing room fan 2-7. Super freezing2-8. *Miracle Zone function MICOM FUNCTIONDoors of freezing 2-11. Door opening alarm2-10. Control of M/C room fan motor or home bartemperature of a 2-15. Sequential operation of built-in productIf error occurs when closing2-16. Failure Diagnosis Function MICOM FUNCTIONMICOM FUNCTION 2-17. Test FunctionContents Mode2-18. Function of dispenser and water dispenser built-in TEST MODE 1 STATUS LCD TEST MODE 2 STATUS LCDMICOM FUNCTION EXPLATION FOR MICOM CIRCUIT 1-1. Power circuit1. Explanation for PWB circuit EXPLATION FOR MICOM CIRCUIT 1-3. Reset circuit1-2. Oscillation circuit 1 GR-P227/L227/P257/L2571. LOAD DRIVING CIRCUIT 1-4. Load/dispenser operation, door opening circuitEXPLATION FOR MICOM CIRCUIT 1 GR-P227/L227/P257/L257EXPLATION FOR MICOM CIRCUIT 1-5. Dispenser operation circuit2 Lever Switch sensing circuit Measuring part 1 GR-P227/L227/P257/L2571 GR-P227/L227/P257/L257 1-6. Door opening sensing circuitEXPLATION FOR MICOM CIRCUIT Measuring part1 GR-P227/L227/P257/L257 1-7. Temperature sensing circuitEXPLATION FOR MICOM CIRCUIT SENSOREXPLATION FOR MICOM CIRCUIT 1-8. Switch entry circuit1-9. Option designation circuit model separation function 1 GR-P227/L227/P257/L257CCW Reverse rotation 1-10. Stepping motor operation circuitEXPLATION FOR MICOM CIRCUIT Positive rotation CWEXPLATION FOR MICOM CIRCUIT 1-11. Fan motor driving circuit freezer, mechanical area1 GR-P227/L227/P257/L257 EXPLATION FOR MICOM CIRCUIT 1-12. Temperature compensation and temperature compensation circuit1. Temperature compensation in freezer and refrigerator 1 GR-P227/L227/P257/L257EXPLATION FOR MICOM CIRCUIT EXPLATION FOR MICOM CIRCUIT 2. Compensation circuit for temperature at freezer1 GR-P227/L227/P257/L257 EXPLATION FOR MICOM CIRCUIT L/Wire FD/H4-wiresDC GND Transmission error status 1 GR-P227/L227/P257/L257Freezing Sensor 2 Sensor resistance characteristics tableEXPLATION FOR MICOM CIRCUIT Refrigerator sensor 1&21-14. Miracle Zone STEPPING MOTOR / Display EXPLATION FOR MICOM CIRCUIT1. Operation Principle 1-1. Operation Principle of Icemaker Power OnICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR Start Position2-3. Harvest Mode 2. ICEMAKER FUNCTIONS2-1. Start Position 2-4. Fill/Park PositionCONTENTS INDICATOR3-1. ERROR CODES shown on Icemaker water supply control panel 3. Defect diagnosis functionCIRCUIT 1 GR-P227/L227/P257/L257GR-P227/L227/P257/L257HOW TO CHECK 1. Trouble ShootingTROUBLE DIAGNOSIS CLAIMSCLAIMS HOW TO CHECKTROUBLE DIAGNOSIS CAUSES AND CHECK POINTSCLAIMS HOW TO CHECKTROUBLE DIAGNOSIS CAUSES AND CHECK POINTSDoor switch HOW TO CHECKFaulty fan motor FaultsInsufficient compressor. - Faulty compressor HOW TO CHECKBad low termperature RPM characteristics Faulty fanCLAIMS HOW TO CHECKTROUBLE DIAGNOSIS CAUSES AND CHECK POINTSCLAIMS HOW TO CHECKTROUBLE DIAGNOSIS CAUSES AND CHECK POINTSCLAIMS HOW TO CHECKTROUBLE DIAGNOSIS CAUSES AND CHECK POINTSCLAIMS HOW TO CHECKTROUBLE DIAGNOSIS CAUSES AND CHECK POINTSclosed faulty stopper HOW TO CHECKopened when freezer TROUBLE DIAGNOSIS2-2. Compressor 2. Faults2-1. Power ProblemsTROUBLE DIAGNOSIS 2-3. TemperatureProblems CausesTROUBLE DIAGNOSIS 2-4. CoolingProblems CausesCauses ProblemsTROUBLE DIAGNOSIS ChecksTROUBLE DIAGNOSIS 2-5. Defrosting failureProblems CausesCauses ProblemsTROUBLE DIAGNOSIS ChecksTROUBLE DIAGNOSIS 2-6. IcingProblems CausesCauses ProblemsTROUBLE DIAGNOSIS ChecksTROUBLE DIAGNOSIS 2-7. SoundProblems CausesCauses ProblemsTROUBLE DIAGNOSIS ChecksCauses ProblemsTROUBLE DIAGNOSIS ChecksTROUBLE DIAGNOSIS 2-8. OdorProblems CausesSymptom 2-9. MicomProblems TROUBLE DIAGNOSISTROUBLE DIAGNOSIS ProblemsSymptom CausesTROUBLE DIAGNOSIS ProblemsSymptom CausesTROUBLE DIAGNOSIS ProblemsSymptom CausesTROUBLE DIAGNOSIS ProblemsSymptom CausesItems 3. Cooling Cycle Heavy RepairTROUBLE DIAGNOSIS Unitreplacement 3-2. Summary Of Heavy RepairContents TROUBLE DIAGNOSISTROUBLE DIAGNOSIS 3-3. Precautions During Heavy RepairPrecautions ItemsWhen replacing a drier 3-4. Practical Work For Heavy RepairPrecautions When replacing a compressorItems PrecautionsTROUBLE DIAGNOSIS KEYPOINTINGTROUBLE DIAGNOSIS 3-5. Standard Regulations For Heavy RepairPrecautions 12-0 mm1 Asia / Middle-East Africa 3-6. Brazing Reference DrawingsTROUBLE DIAGNOSIS 2 Europe & CIS / AmericaProblems 4. HOW TO DEAL WITH CLAIMS4-1. Sound Explain the principles of temperature changeTROUBLE DIAGNOSIS ProblemsExplain the procedure and principles of ice maker operation Checks and MeasuresCheck temperature set in the temperature control knob 4-2. Measures for Symptoms on TemperatureProblems Explain the characteristics of ice creamCheck the temperature control button and set at “strong” 4-3. Odor and FrostProblems TROUBLE DIAGNOSISTROUBLE DIAGNOSIS 4-5. OthersProblems Checks and Measures2 Remove a freezer door HOW TO DISASSEMBLE AND ASSEMBLE1. DOOR A A B3. SHROUD, GRILLE FAN 2. HANDLEHOW TO DISASSEMBLE AND ASSEMBLE HOW TO DISASSEMBLE AND ASSEMBLE 4. WATER VALVE DISASSEMBLY METHOD5. FAN AND FAN MOTOR DISASSEMBLY METHOD InsertTubeLineColletClipSolenoidAssembly 6. DISPENSERAssembly LeverAssembly AssemblyDuctCapHOW TO DISASSEMBLE AND ASSEMBLE 7 Dispenser Related PartsFREEZER DOOR PART GR-P227/L227/P257/L257 EXPLODED VIEW#EV# Optional part Ref No. GR-P227/GR-P257REFRIGERATOR DOOR PART EXPLODED VIEWREFRIGERATOR DOOR PART Ref No. GR-L227/GR-L257EXPLODED VIEW Optional partOptional part FREEZER COMPARTMENTEXPLODED VIEW 101BOptional part REFRIGERATOR COMPARTMENTEXPLODED VIEW #EV#Optional part MACHINE COMPARTMENTEXPLODED VIEW #EV#Optional part ICE & WATER PARTEXPLODED VIEW 625A 616F 616G 627A 624BOptional part DISPENSER PARTEXPLODED VIEW #EV#P/No. 3828JD8999A FEB., 2006 Printed in Korea