LG R410A Service Manual page 91

6. Function
1. Basic control ...................................................................................................................92
1.1 Normal operation .......................................................................................................92
1.2 Compressor control....................................................................................................92
1.3 Main and sub unit's LEV control.................................................................................92
1.4 Fan control .................................................................................................................92
2. Special control ................................................................................................................93
2.1 Oil return control ........................................................................................................93
2.2 Defrost control............................................................................................................95
2.3 Oil equalizing control..................................................................................................96
2.4 Stopping operation .....................................................................................................96
3. Protection control ...........................................................................................................97
3.1 Pressure protection control ........................................................................................97
3.2 Discharge temperature control...................................................................................99
3.3 Inverter protection control ..........................................................................................99
3.4 Liquid back control ...................................................................................................100
3.5 Phase detection .......................................................................................................100
4. Other control .................................................................................................................101
4.1 Initial setup ...............................................................................................................101
4.2 Instant indoor unit checking mode ...........................................................................103
4.3 Emergency operation ...............................................................................................104
Service Manual 91