LG ARUN Series Service Manual page 21

Function
1. Basic control ...................................................................................................................22
1.1 Normal operation .......................................................................................................22
1.2 Compressor control....................................................................................................22
1.3 Master and slave unit's EEV control...........................................................................23
2. Special control ................................................................................................................24
2.1 Oil return control ........................................................................................................24
2.2 Defrost control............................................................................................................26
2.3 Oil equalizing control..................................................................................................27
3. Protection control ...........................................................................................................28
3.1 Pressure protection control ........................................................................................28
3.2 Discharge temperature control...................................................................................29
3.3 Inverter protection control ..........................................................................................29
3.4 Liquid back control .....................................................................................................30
3.5 Phase detection .........................................................................................................30
3.6 Pressure switch..........................................................................................................30
4. Other control ...................................................................................................................31
4.1 Initial setup .................................................................................................................31
4.2 Instant indoor unit checking mode .............................................................................33
4.3 Emergency operation .................................................................................................34
4.4 Refrigerant Auto Charging .........................................................................................36
4.5 Refrigerant Checking Function...................................................................................38
4.6 Pump Down................................................................................................................40
4.7 Pump Out ...................................................................................................................41
4.8 Auto Back Up Function_Inverter compressor ............................................................43
4.9 Auto Back Up Function_constant speed compressor ................................................44
4.10 Night Low Noise Function ........................................................................................45
4.11 Vacuum Mode ..........................................................................................................47
4.13 Black Box Function ..................................................................................................48
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Function
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