LG R410A - Liquid Back Control; Phase Detection

100 Outdoor Unit
3.4Liquidbackcontrol
■ Cooling mode
■ Heating mode
❇ The logic starts after 9 min. on heating mode and 4 min. on cooling mode from the compressor running.
Tdis < Tc + 12˚C
Discharge temperature Indoor unit ’s LEV
Normal SH control
Tdis > Tc + 16˚C
SH increasing control
SH increasing control
Tdis < Tc + 16˚C
Discharge temperature Outdoor unit’s LEV
Normal SH control
Tdis > Tc + 17˚C
Function
3.5 Phase detection
- Inverter PCB has phase fault detection circuit. If a phase is missed, error LED(red) flickers once per second
when power is on.