Table Of Contents - LG Multi-Inverter Type Service Manual

Part 1 General Information.........................................................................................................2
1. Safety Precautions........................................................................................................3
2. Model Line Up................................................................................................................6
3. Nomenclature ................................................................................................................7
Part 2 Functions & Controls ......................................................................................................8
1. List of Functions & Controls........................................................................................9
2. Air Flow .......................................................................................................................12
3. Air Purifying.................................................................................................................14
4. Installation Functions .................................................................................................15
5. Reliability .....................................................................................................................18
6. Convenience Functions & Controls .........................................................................19
Part 3 Control logic....................................................................................................................24
1. Compressor .................................................................................................................25
2. Step(frequency) control..............................................................................................26
3. Reversing valve operaton ..........................................................................................27
4. Discharge pipe control ...............................................................................................28
5. Input Current Control..................................................................................................29
6. Outdoor Fan Control...................................................................................................30
7. Defrost Control............................................................................................................31
8. LEV Control .................................................................................................................32
9. Oil restoration operation ............................................................................................34
10. Compressor warm-up control logic ........................................................................34
11. Heat sink control .......................................................................................................35
Part 4 Test Run ..........................................................................................................................36
1. Check before Test Run ..............................................................................................37
2. Test Run Flow chart ...................................................................................................38
3. Test Runing..................................................................................................................39
Part 5 Trouble Shooting Guide ...............................................................................................40
1. Self-diagnosis Function ......................................................................................41
2. Pump Down ..........................................................................................................43
3. Evacuation............................................................................................................44
4. Gas Charging .......................................................................................................45
5. Cycle Part .............................................................................................................46
6. Electronic Parts....................................................................................................47
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Air Conditioner Service Manual
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