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Only for training and service purposes

LGE Internal Use Only

Air Conditioner Service Manual

TABLE OF CONTENTS

Part 1 General Information ..........................................................................................................2

1. Safety Precautions........................................................................................................3

2. Model Line Up................................................................................................................6

3. Nomenclature ................................................................................................................9

Part 2 Functions & Controls......................................................................................................11

1. List of Functions & Accessory ..................................................................................12

2. Air Flow .......................................................................................................................14

3. Air Purifying.................................................................................................................16

4. Installation Functions.................................................................................................17

5. Reliability .....................................................................................................................18

6. Convenience Functions & Controls .........................................................................19

7. Special Function & KIT...............................................................................................26

Part 3 Basic Control ..................................................................................................................29

1. Normal operation ........................................................................................................30

2 Compressor control ....................................................................................................30

3. EEV( Electronic Expansion Valve) control ...............................................................30

4. Oil return control ........................................................................................................31

5. Defrost control ...........................................................................................................31

6. Protection control ......................................................................................................32

Part 4 Test Run..........................................................................................................................33

1. Check before Test Run .............................................................................................34

2. Test Run Flow chart ..................................................................................................35

3. Test Runing.................................................................................................................36

Part 5 Trouble Shooting Guide ...............................................................................................38

1. Self-diagnosis Function .....................................................................................39

2. Pump Down .........................................................................................................41

3. Evacuation...........................................................................................................42

4. Gas Charging ......................................................................................................43

5. Cycle Part ............................................................................................................44

6. Electronic Parts...................................................................................................45

Part 6 Service Order.................................................................................................................110

1. PCB Service Order ...................................................................................................111

LG LMCN125HV Service Manual

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