LG MULTI V IV ARNU07GTU 2 Series Service Manual page 17

Function
1. Basic control ...................................................................................................................18
1.1 Normal operation .......................................................................................................18
1.2 Compressor control....................................................................................................18
1.3 Master and slave unit's EEV control ..........................................................................19
2. Special control ................................................................................................................20
2.1 Oil return control ........................................................................................................20
2.2 Defrost control............................................................................................................22
2.3 Partial Defrost ............................................................................................................23
2.4 Stop operation............................................................................................................24
2.5 Oil equalizing control..................................................................................................24
3. Protection control ...........................................................................................................25
3.1 Pressure protection control ........................................................................................25
3.2 Discharge temperature control...................................................................................26
3.3 Inverter protection control ..........................................................................................26
3.4 Phase detection .........................................................................................................27
3.5 Pressure switch..........................................................................................................27
4. Other control ...................................................................................................................28
4.1 Initial setup .................................................................................................................28
4.2 Emergency operation .................................................................................................30
4.3 Refrigerant Auto Charging ........................................................................................32
4.4 Pump Out ...................................................................................................................33
4.5 Refrigerant amount automatic judgment ....................................................................34
4.6 ITR(Cooling)...............................................................................................................35
4.7 ITR(Heating) ..............................................................................................................36
4.8 FDD Code ..................................................................................................................38
4.9 Multi V ITR result report .............................................................................................39
4.10 Pump Down .............................................................................................................40
4.11 Pump Out .................................................................................................................42
4.12 Auto Back Up Function_Inverter compressor ..........................................................44
4.13 Night Low Noise Function ........................................................................................45
4.14 Vacuum Mode ..........................................................................................................46
4.15 Static pressure compensation mode........................................................................46
4.16 Cool & Heat selector ................................................................................................47
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