Liquid Back Control; Pressure Switch - LG ARWN038GA2 Service Manual

3.4 Liquid back control

■ Cooling mode
Discharge temperature
Tdis < Tc + 12˚C
Tdis > Tc + 16 ˚C
■ Heating mode
Discharge temperature
Tdis < Tc + 17˚C
Tdis > Tc + 18 ˚C
❇ The logic starts after 9min. on heating mode and 4min. on cooling mode from the compressor running.

3.5 Pressure switch

- The state of pressure sensing switch is normally on. It has small electric current from 220V AC. Never touch
the connecting terminal with hand nor short two wires directly.
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Only for training and service purposes
Indoor unit 's EEV
SH increasing control
Normal SH control
Outside unit 's EEV
SH increasing control
Normal SH control
- 23 -
Function
LGE Internal Use Only