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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 ..........................................................................................................3

1. Safety Precautions........................................................................................................4

2. Model Line Up................................................................................................................7

3. Nomenclature ..............................................................................................................11

Part 2 Functions & Controls......................................................................................................15

1. List of Functions & Accessory ..................................................................................16

2. Air Flow .......................................................................................................................27

3. Air Purifying.................................................................................................................29

4. Installation Functions.................................................................................................30

5. Reliability .....................................................................................................................41

6. Convenience Functions & Controls .........................................................................42

7. Special Function & KIT...............................................................................................50

Part 3 Basic Control ..................................................................................................................53

1. Normal operation ........................................................................................................54

2 Compressor control ....................................................................................................54

3. EEV( Electronic Expansion Valve) control ...............................................................54

Part 4 Trouble Shooting Guide ...............................................................................................55

1. Self-diagnosis Function ............................................................................................56

2. Pump Down ................................................................................................................58

3. Evacuation (All amount of refrigerant leaked) ........................................................59

4. Gas Charging (After Evacuation)..............................................................................60

5. Cycle Part....................................................................................................................61

6. Electronic Parts..........................................................................................................62

LG CT18 NQ2 User Manual

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