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LG Electronics GR-P257/L257 service manual Explation For Micom Circuit, GR-P227/L227/P257/L257

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

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EXPLATION FOR MICOM CIRCUIT

2.Compensation circuit for temperature at freezer

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

			Temperature compensation in CUT
		JCR1	+1 °C [+1.8 °F]	+2 °C [+3.6 °F]
		JCR2	+1 °C [+1.8 °F]	+2 °C [+3.6 °F]
		JCR2	+1 °C [+1.8 °F]
		JCR3	-1 °C [-1.8 °F]	-2 °C [-3.6 °F]
		JCR4	-1 °C [-1.8 °F]	-2 °C [-3.6 °F]
		JCR4	-1 °C [-1.8 °F]
Compensation		Compensation		Temperature compensation value
for too warm			for too cold	Temperature compensation value		Remarks
for too warm			for too cold	at refrigerator		Remarks
JCR3	JCR4	JCR1	JCR2	at refrigerator
JCR3	JCR4	JCR1	JCR2
				0 °C (In shipment from factory)
CUT				-1	°C [-1.8 °F]
	CUT			-1	°C [-1.8 °F]
		CUT		+1	°C [+1.8 °F]
			CUT	+1	°C [+1.8 °F]
CUT	CUT			-2	°C [-3.6 °F]
		CUT	CUT	+2	°C [+3.6 °F]
CUT		CUT		0 °C [0 °F]
CUT			CUT	0 °C [0 °F]
	CUT	CUT		0 °C [0 °F]
	CUT		CUT	0 °C [0 °F]
CUT	CUT	CUT		-1	°C [-1.8 °F]
	CUT	CUT	CUT	+1	°C [+1.8 °F]
CUT	CUT	CUT	CUT	0 °C [0 °F]

uThis circuit allows adjustment of the set temperature for compensation by changing jumpers at locations JCR1~JCR4.

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LG Electronics GR-P257/L257, GR-P227/L227 Explation For Micom Circuit, Compensation circuit for temperature at freezer

Contents

MODEL GR-P227/L227 GR-P257/L257 http//eic.lgservice.comSERVICE MANUAL REFRIGERATORHOW TO INSTALL THE REFRIGERATOR CONTENTSWARNINGS AND PRECAUTIONS FOR SAFETY SPECIFICATIONSWARNINGS 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 SPECIFICATIONSPARTS IDENTIFICATION 1. Ref No. GR-P227/GR-P257 INTERNAL FILTERFreezer Refrigerator compartment compartment Cover PWB 2. Ref No. GR-P227/GR-P257 EXTERNAL FILTERPARTS IDENTIFICATION Freezer Refrigerator compartment compartment3. Ref No. GR-P227/GR-P257 INTERNAL FILTER PARTS IDENTIFICATIONFreezer Refrigerator compartment compartment 4. Ref No. GR-P227/GR-P257 EXTERNAL FILTER PARTS IDENTIFICATIONFreezer Refrigerator compartment compartment 2. If the height of freezer door is higher than that of HOW TO INSTALL REFRIGERATOR1. How to Adjust Door Height of Refrigerator 1. If the height of freezer door is lower than that of2-1. When connecting directly to the water tap 2. How to Install Water PipeHOW TO INSTALL REFRIGERATOR Before InstallationCold Water HOW TO INSTALL REFRIGERATOR1. Connection of Pipe Connector A and B Hot WaterOutternal Filter 1. Filter Fixation HOW TO INSTALL REFRIGERATOR3. When customer uses bottled water 2. Filter CleaningInstalling water filter 1. Initial installation of water filter HOW TO INSTALL REFRIGERATORInstall Water Filter Applicable to some models only Before Installing water filter3. How to Control the Amount of Water Supplied to Icemaker 3-1. Confirm the amount of water supplied to the icemakerHOW TO INSTALL REFRIGERATOR 1. Door Alarm Buzzer Mute Mode MICOM FUNCTION1. Monitor Panel 1-2. Display Second FunctionMICOM FUNCTION 2. Description of Function2-1-1. Funnction of Temperature Selection Power Initially On2-1-4. Lock function display button lock 2-1-3. Outside temperature display functionMICOM FUNCTION 2-1-2. LCD Back Light Control2-5. Express Freezer 2-4. When ice maker does not operate smoothly2-2. Dispenser use selection 2-3. Automatic ice makerMICOM FUNCTION 2-7. Super freezing2-8. *Miracle Zone function 2-9. Control of variable type of freezing room fanor home bar 2-11. Door opening alarm2-10. Control of M/C room fan motor Doors of freezingwhen closing 2-15. Sequential operation of built-in productIf error occurs temperature of aMICOM FUNCTION 2-16. Failure Diagnosis FunctionMode 2-17. Test FunctionContents MICOM FUNCTIONTEST MODE 1 STATUS LCD TEST MODE 2 STATUS LCD 2-18. Function of dispenser and water dispenser built-inMICOM FUNCTION 1-1. Power circuit EXPLATION FOR MICOM CIRCUIT1. Explanation for PWB circuit 1 GR-P227/L227/P257/L257 1-3. Reset circuit1-2. Oscillation circuit EXPLATION FOR MICOM CIRCUIT1 GR-P227/L227/P257/L257 1-4. Load/dispenser operation, door opening circuitEXPLATION FOR MICOM CIRCUIT 1. LOAD DRIVING CIRCUIT1 GR-P227/L227/P257/L257 1-5. Dispenser operation circuit2 Lever Switch sensing circuit Measuring part EXPLATION FOR MICOM CIRCUITMeasuring part 1-6. Door opening sensing circuitEXPLATION FOR MICOM CIRCUIT 1 GR-P227/L227/P257/L257SENSOR 1-7. Temperature sensing circuitEXPLATION FOR MICOM CIRCUIT 1 GR-P227/L227/P257/L2571 GR-P227/L227/P257/L257 1-8. Switch entry circuit1-9. Option designation circuit model separation function EXPLATION FOR MICOM CIRCUITPositive rotation CW 1-10. Stepping motor operation circuitEXPLATION FOR MICOM CIRCUIT CCW Reverse rotation1-11. Fan motor driving circuit freezer, mechanical area EXPLATION FOR MICOM CIRCUIT1 GR-P227/L227/P257/L257 1 GR-P227/L227/P257/L257 1-12. Temperature compensation and temperature compensation circuit1. Temperature compensation in freezer and refrigerator EXPLATION FOR MICOM CIRCUITEXPLATION FOR MICOM CIRCUIT 2. Compensation circuit for temperature at freezer EXPLATION FOR MICOM CIRCUIT1 GR-P227/L227/P257/L257 1 GR-P227/L227/P257/L257 L/Wire FD/H4-wiresDC GND Transmission error status EXPLATION FOR MICOM CIRCUITRefrigerator sensor 1&2 2 Sensor resistance characteristics tableEXPLATION FOR MICOM CIRCUIT Freezing SensorEXPLATION FOR MICOM CIRCUIT 1-14. Miracle Zone STEPPING MOTOR / DisplayStart Position 1-1. Operation Principle of Icemaker Power OnICEMAKER AND DISPENSER WORKING PRINCIPLES AND REPAIR 1. Operation Principle2-4. Fill/Park Position 2. ICEMAKER FUNCTIONS2-1. Start Position 2-3. Harvest Mode3. Defect diagnosis function INDICATOR3-1. ERROR CODES shown on Icemaker water supply control panel CONTENTS1 GR-P227/L227/P257/L257GR-P227/L227/P257/L257 CIRCUITCLAIMS 1. Trouble ShootingTROUBLE DIAGNOSIS HOW TO CHECKCAUSES AND CHECK POINTS HOW TO CHECKTROUBLE DIAGNOSIS CLAIMSCAUSES AND CHECK POINTS HOW TO CHECKTROUBLE DIAGNOSIS CLAIMSFaults HOW TO CHECKFaulty fan motor Door switchFaulty fan HOW TO CHECKBad low termperature RPM characteristics Insufficient compressor. - Faulty compressorCAUSES AND CHECK POINTS HOW TO CHECKTROUBLE DIAGNOSIS CLAIMSCAUSES AND CHECK POINTS HOW TO CHECKTROUBLE DIAGNOSIS CLAIMSCAUSES AND CHECK POINTS HOW TO CHECKTROUBLE DIAGNOSIS CLAIMSCAUSES AND CHECK POINTS HOW TO CHECKTROUBLE DIAGNOSIS CLAIMSTROUBLE DIAGNOSIS HOW TO CHECKopened when freezer closed faulty stopperProblems 2. Faults2-1. Power 2-2. CompressorCauses 2-3. TemperatureProblems TROUBLE DIAGNOSISCauses 2-4. CoolingProblems TROUBLE DIAGNOSISChecks ProblemsTROUBLE DIAGNOSIS CausesCauses 2-5. Defrosting failureProblems TROUBLE DIAGNOSISChecks ProblemsTROUBLE DIAGNOSIS CausesCauses 2-6. IcingProblems TROUBLE DIAGNOSISChecks ProblemsTROUBLE DIAGNOSIS CausesCauses 2-7. SoundProblems TROUBLE DIAGNOSISChecks ProblemsTROUBLE DIAGNOSIS CausesChecks ProblemsTROUBLE DIAGNOSIS CausesCauses 2-8. OdorProblems TROUBLE DIAGNOSISTROUBLE DIAGNOSIS 2-9. MicomProblems SymptomCauses ProblemsSymptom TROUBLE DIAGNOSISCauses ProblemsSymptom TROUBLE DIAGNOSISCauses ProblemsSymptom TROUBLE DIAGNOSISCauses ProblemsSymptom TROUBLE DIAGNOSISUnit 3. Cooling Cycle Heavy RepairTROUBLE DIAGNOSIS ItemsTROUBLE DIAGNOSIS 3-2. Summary Of Heavy RepairContents replacementItems 3-3. Precautions During Heavy RepairPrecautions TROUBLE DIAGNOSISWhen replacing a compressor 3-4. Practical Work For Heavy RepairPrecautions When replacing a drierKEYPOINTING PrecautionsTROUBLE DIAGNOSIS Items12-0 mm 3-5. Standard Regulations For Heavy RepairPrecautions TROUBLE DIAGNOSIS2 Europe & CIS / America 3-6. Brazing Reference DrawingsTROUBLE DIAGNOSIS 1 Asia / Middle-East AfricaExplain the principles of temperature change 4. HOW TO DEAL WITH CLAIMS4-1. Sound ProblemsChecks and Measures ProblemsExplain the procedure and principles of ice maker operation TROUBLE DIAGNOSISExplain the characteristics of ice cream 4-2. Measures for Symptoms on TemperatureProblems Check temperature set in the temperature control knobTROUBLE DIAGNOSIS 4-3. Odor and FrostProblems Check the temperature control button and set at “strong”Checks and Measures 4-5. OthersProblems TROUBLE DIAGNOSISA A B HOW TO DISASSEMBLE AND ASSEMBLE1. DOOR 2 Remove a freezer door2. HANDLE 3. SHROUD, GRILLE FANHOW TO DISASSEMBLE AND ASSEMBLE InsertTubeLineColletClip 4. WATER VALVE DISASSEMBLY METHOD5. FAN AND FAN MOTOR DISASSEMBLY METHOD HOW TO DISASSEMBLE AND ASSEMBLELeverAssembly AssemblyDuctCap 6. DISPENSERAssembly SolenoidAssembly7 Dispenser Related Parts HOW TO DISASSEMBLE AND ASSEMBLEEXPLODED VIEW FREEZER DOOR PART GR-P227/L227/P257/L257#EV# EXPLODED VIEW Ref No. GR-P227/GR-P257REFRIGERATOR DOOR PART Optional partOptional part Ref No. GR-L227/GR-L257EXPLODED VIEW REFRIGERATOR DOOR PART101B FREEZER COMPARTMENTEXPLODED VIEW Optional part#EV# REFRIGERATOR COMPARTMENTEXPLODED VIEW Optional part#EV# MACHINE COMPARTMENTEXPLODED VIEW Optional part625A 616F 616G 627A 624B ICE & WATER PARTEXPLODED VIEW Optional part#EV# DISPENSER PARTEXPLODED VIEW Optional partFEB., 2006 Printed in Korea P/No. 3828JD8999A