Explain the flow of refrigerant | LG Electronics GR-P227/L227

TROUBLE DIAGNOSIS

	Problems	Checks and Measures

Sounds of water flowing		■ Explain the flow of refrigerant.
		• When the refrigerator stops, the water flowing sound happens.
		This sound happens when the liquid or vapor refrigerant flows from the
		evaporator to compressor.

"Click" sounds		■ Explain the characteriistics of moving parts.
		• This noise comes from the MICOM controller's switch on the top of the
		refrigerator when it is turned on and off.

Noise of ice maker operation		■ Explain the procedure and principles of ice maker operation.
(applicable to model with ice maker).		• Automatic ice maker repeats the cycle of water supplying ➝ icemaking ➝ ice
- Noise produced by ice dropping		ejection. When water is supplied, the water supply valve in the machine room
and hitting ice bank.		makes sounds like “Whizz” and water flowing also makes sound. When water
- Noise from motor sounds “Whizz”.		freezes to ice, freezing sounds such as “click, click” are heard. When ice is
		being ejected, sounds like “Whizz” produced by a motor to rotate an ice tray
		and ice dropping and hitting ice bank sounds are also heard.

Noise when	supplying water.	■ Explain the principles of water supplied to dispenser.
		• When the water supply button in the dispenser is pressed, the water supply
		valve in the compressor compartment opens and let the water flow to the water
		tank in the lower part of the refrigerator compartment. The water is dispensed
		by this pressure. When this happens, motor sound and water flowing sound are
		heard.

Noise when	supplying ice.	■ Explain the principles of ice supply and procedure of crushed ice making in a
		dispenser.
		• When ice cube button is pressed, ice stored in the ice bank is moved by a Helix
		Pusher and dispensed. If crushed ice button is pressed, the cube ice is
		crushed. When this happens, ice crushing and hitting ice bank sounds are
		heard.

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LG Electronics GR-P227/L227, GR-P257/L257 Explain the flow of refrigerant, Explain the characteriistics of moving parts

Contents

Refrigerator Contents Page Specifications Front View Ref No. GR-L227 Ref No. GR-P257 Ref No. GR-L257 Parts Identification Freezer Refrigerator compartment compartment Ref No. GR-P227/GR-P257EXTERNAL Filter Parts Identification Parts Identification HOW to Install Refrigerator How to Adjust Door Height of Refrigerator Before Installation How to Install Water PipeClass Shape and Spec Nomenclature Two Hands Type Faucet Connection of Pipe Connector a and BSingle Lever Type Faucet general General Type Filter Cleaning When customer uses bottled waterOutternal Filter Filter Fixation After installing water filter Replacement of water filter How to Control the Amount of Water Supplied to Icemaker Confirm the amount of water supplied to the icemaker Micom Function Door Alarm Buzzer Mute ModeDisplay Power saving Mode Monitor Panel Exhibition Mode Description of Function Lock function display button lock Outside temperature display functionLCD Back Light Control Filter condition display function Automatic ice maker When ice maker does not operate smoothlyDispenser use selection Express Freezer Miracle Zone function Super freezingControl of variable type of freezing room fan Doors of freezing Door opening alarmControl of M/C room fan motor Or home bar Sequential operation of built-in product Failure Diagnosis Function Mode Operation Contents Remarks Test Function Test Mode 1 Status LCD Test Mode 2 Status LCD Function of dispenser and water dispenser built-in Explanation for PWB circuit Power circuitExplation for Micom Circuit GR-P227/L227 Oscillation circuit Reset circuitGR-P227/L227/P257/L257 Load/dispenser operation, door opening circuit Load Driving Circuit Lever Switch sensing circuit Measuring part Dispenser operation circuit Door opening sensing circuit Temperature sensing circuit Short Open Option designation circuit model separation function Switch entry circuitSeparation 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 Table Stage Items Indicator Remarks Defect diagnosis function Circuit Trouble Shooting Trouble Diagnosis Not 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 Measures Temperature Cooling Disconnected from the motor Refer to fan motor disassembly Defrosting failure Problems CausesMeasures 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 Micom Driving circuits Motor damper Replace door switch Trouble Diagnosis Cooling Cycle Heavy Repair Items Unit Standards Purposes Remarks Process Contents Tools Summary Of Heavy Repair Precautions During Heavy Repair Items Precautions Practical Work For Heavy Repair When replacing a drierWhen replacing a compressor Inserting a capillary tube Charging sequence Pipe ConnectionVacuum Sequence Calculation of amount of refrigerant charged Standard Regulations For Heavy Repair 12-0mm Asia / Middle-East Africa Brazing Reference DrawingsEurope & CIS / America Sound depends on the installation location Problems Checks and MeasuresExplain the principles of temperature change Explain general principles of sounds Explain 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 dispenser Measures 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 formation Others HOW to Disassemble and Assemble Remove a freezer door Handle InsertTubeLineColletClip Assembly COVER, Dispenser Exploded View Ref No. GR-P227/GR-P257 Optional part Ref No. GR-L227/GR-L257 Freezer Compartment Refrigerator Compartment Optional part Machine Compartment ICE & Water Part Dispenser Part No JD8999A