LG Electronics General Wall Mounted-Inverter Type manual Contents

Page 2

Air Conditioner Service Manual

CONTENTS

Part 1

General Information

 

 

1.

Safety Precautions

4

 

2.

Nomenclature

7

Part 2 Functions & Controls

 

 

1.

List of Functions & Controls

9

 

2.

Basic Mode Controls

10

 

3.

Special Mode Controls

12

 

4.

Utility Functions

13

 

5.

Protection Functions & Controls

16

Part 3

Test Run

 

 

1.

Check before Test Run

31

 

2.

Test Run Flow chart

32

 

3.

Test Run Detail

33

Part 4 Trouble Shooting Guide

 

 

1.

2-Way, 3-Way Valve

35

 

2. Pumping Down

36

 

3.

Evacuation (All amount of refrigerant leaked)

37

 

4.

Gas Charging (After Evacuation)

38

 

5.

Cycle Troubleshooting Guide

39

 

6.

Electric Parts Troubleshooting Guide

41

 

7.

Self-diagnosis Function

46

2Room Air Conditioner

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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
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