Table Of Contents - LG Single "A" Service Manual

Part 1 General Information ..........................................................................................................2
1. Safety Precautions........................................................................................................3
2. Model Line up ................................................................................................................6
3. Nomenclature ................................................................................................................8
Part 2 Functions & Controls......................................................................................................10
1. List of Functions & Controls......................................................................................11
2. Air flow .........................................................................................................................13
3. Air purifying.................................................................................................................15
4. Installation Functions .................................................................................................16
5. Reliability .....................................................................................................................19
6. Convenience Functions & Controls .........................................................................20
7. Special Function & KIT ...............................................................................................31
8. Synchro Operation......................................................................................................48
Part 3 Control logic ....................................................................................................................51
1. Compressor .................................................................................................................52
2. Step(frequency) control..............................................................................................54
3. Reversing valve operaton ..........................................................................................57
4. Discharge pipe control ...............................................................................................58
5. Input Current Control..................................................................................................59
6. Outdoor Fan Control...................................................................................................60
7. Defrost Control............................................................................................................63
8. LEV Control .................................................................................................................64
9. Oil restoration operation ............................................................................................70
10. Compressor warm-up control logic ........................................................................70
11. Heat sink control .......................................................................................................71
Part 4 Test Run ..........................................................................................................................72
1. Check before Test Run ...............................................................................................73
2. Test Run Flow chart ....................................................................................................74
Part 5 Trouble Shooting Guide ................................................................................................77
1. Self-diagnosis Function .............................................................................................78
2. Pump Down .................................................................................................................80
3. Evacuation ...................................................................................................................81
4. Gas Charging...............................................................................................................82
5. Cycle Part.....................................................................................................................83
6. Electronic Parts...........................................................................................................84
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Only for training and service purposes
Air Conditioner Service Manual
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