LG Electronics GR-P227/L227, GR-P257/L257 Test Function, Mode Operation Contents Remarks

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MICOM FUNCTION

2-17. Test Function

1.The purpose of test function is to check function of the PWB and product and to search for the failure part at the failure status.

2.Test button is placed on the main PCB of refrigerator (test switch), and the test mode will be finished after maximum 2 hours irrespective of test mode and then is reset to the normal status.

3.Function adjustment button is not perceived during performance of test mode.

4.In finishing test mode, always pull the power cord out and then plug-in it again for the normal state.

5.If nonconforming contents such as sensor failure are found during performance of test mode, release the test mode and display the failure code.

6.Even if pressing the test button during failure code display, test mode will not be performed.

Mode	Operation		Contents	Remarks

Test 1	Press test button once	1. Continuous operation of compressor		Freezing fan turns off in
	(strong cold mode)	2. Continuous operation of freezing bldc motor		door opening
			(high-speed RPM) and cooling bldc motor
		3.	Defrost heater turns off
		4.	Stepping motor damper is completely
			opened (open of baffle)
		5.	Miracle zone stepping motor damper is
			completely closed.
		6.	All display LCD graphics turns on.

Test 2	Press test button once at	1. Compressor OFF		Return to the normal mode
	the test mode 1 status	2. Freezing bldc motor and cooling bldc motor		when the defrost sensor is
	(forced defrost mode)		turn off	above +5°C
		3.	Defrost heater turns on
		4.	Stepping motor damper is completely
			closed (closing of baffle)
		5.	Miracle zone stepping motor damper is
			completely closed.
		6.	All display LCD graphics turns off (only LCD
			turns on for(A) “MIDIUM” status, (B)
			“MIDIUM” status)

Normal	Press test button once at	Return to the initial status.		Compressor will operate
Status	the test mode 2 status			after delay for 7 minutes

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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