LG Electronics General Wall Mounted-Inverter Type manual

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Part 4 Trouble Shooting

Error code	Description	Cause of error

	Heat-sink Temp. is over	• Heat-sink TH. is damaged(short or open).
	Heat-sink Temp. is over
	95°C(203°F)	°	°	F)
4		• Heat-sink Temp. is over 95 C(203		F)
4	Heat-sink TH.
	Heat-sink TH.	• Damage or defect on the sensing circuit of outdoor pcb assembly.
	is open or short
		(R01H, R02H, C01H)

Check flow

Heat-sink TH is connected to outdoor PCB assembly?

No

YES

Heat-sink TH. in INV-IC is Right ?

No

YES

Sensing circuit of outdoor pcb is right ?

No

-Connect to CN-TH2 in outdoor PCB assembly

Check heat-sink TH.

-Measure resistance of TH. (about 10kΩ at 25°C(77°F))

-Check soldering state of R01H, R02H, C01H

50Room Air Conditioner

Image 50

Contents SVC MANUALGeneral Contents Safety Precautions Nomenclature Part 1 General InformationSafety Precautions Be sure not to do Be sure to follow the instructionPart 1 General Information Inspections after Repair Code Type Code of Model Meaning NomenclatureGlobal Model Name Part 2 Functions & Controls Part 2 Functions & Controls Function DescriptionHeating Mode Basic Mode ControlsCooling Mode Automatic operation Intake air Temp Setting TempHealthy Dehumidification operation Auto changeover operationJet Cool operation Special Mode ControlsEnergy saving operation in cooling mode Jet Heat operationUtility Functions Auto cleaning operationIndoor temp Operating Mode Setting temp Forced operationChaos Swing Air volume controlNatural Air ControlAuto Wind Sleep timer operation for heating cycle Sleep mode Auto controlSleep timer operation for cooling cycle Auto restartTwo Minutes Stand-by comp Protection Functions & ControlsFive Seconds Stand-by fan Hot startAutomatic defrost 1 9,12kBtu/h ModelStarting to the defrosting operation 2 18,24,30kBtu/h ModelDefrosting Control Algorithm Control algorithm of defrost completionPower Relay Control InverterOverheating Protection Power Module Function Heat sink sensor failure errorHeat sink temperature control CT2 control Total Current Control Over Current ProtectionCT1 control Model Cooling Heating KBtu/h 18~30 11A 12A 14A DC Peak control Discharge Pipe Temp ControlInverter Compressor 18,24,30kBtu/h Model Compressor working Constant Compressor only 30kBtu/h ModelThere can be two situations 12.2 18, 24, 30kBtu/h Model Low Ambient control12.1 9,12kBtu/h Model Operating Contion Oil return control30kBtu/h ModelOil equalizing control30kBtu/h Model Operation ProcessCheck before Test Run Test Run Flow chart Test Run Detail Part 3 Test RunCheck before Test Run Test Run Flow chart StartSettlement of outdoor unit Pump Down ProcedureTest Run Detail Evaluation of the performancePart 4 Trouble Shooting Way, 3-Way Valve Way Valve Liquid SideAir purging of the charge hose ProcedurePumping Down Set the 2-way valve to the closed positionEvacuation All amount of refrigerant leaked Connect the charge hose to the charging cylinder Mount the valve stem nuts and the service port nutGas Charging After Evacuation Purge the air from the charge hoseCycle Troubleshooting Guide Trouble analysisPart 4 Trouble Shooting Electronic Parts Troubleshooting Guide Procedure Specification RemedyTrouble Compressor/Outdoor Fan dont operate 9~30kBtu/h Model Compressor/Outdoor Fan dont operate 18, 24, 30kBtu/h Model When indoor Fan does not operate.9~30kBtu/h Model 12kBtu/h Model Error IndicatorSelf-diagnosis Function Error code Descrition 18,24,30kBtu/h Model Indoor ErrorOutdoor Error Red Green StatusPart Trouble Shooting Troubleshooting Guide9,12kBtu/h Model Description Cause of error Heat-sink Temp. is over Earth port DC Peak Error Description Cause of error Over current Error Description Cause of error Indoor fan is locked Description Cause of error Pipe TH. is short or Troubleshooting CH01, CH02, CH06 Check PointPart 4 Trouble Shooting Troubleshooting CH05, CH53Copper Comp pipe Troubleshooting CH21Comp Troubleshooting CH21, CH22 Troubleshooting CH23, CH28 Troubleshooting CH24, CH25 Troubleshooting CH26, CH27 Troubleshooting CH32, CH33, CH40 Troubleshooting CH41, CH44, CH45, CH46, CH47, CH65 Troubleshooting CH51, CH60 Troubleshooting CH61, CH62 No MFL41161601 August