LG ARNU Series - Liquid Back Control

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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3.4 Liquid back control
■ Main unit on cooling mode
■ Sub unit on cooling mode
■ Main unit on heating mode
■ Sub unit on 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 EEV
Normal SH control
Tdis > Tc + 16˚C
SH increasing control
Tdis < Tc + 12˚C
Discharge temperature Indoor unit’s EEV
Normal SH control
Tdis > Tc + 16˚C
SH increasing control
SH increasing control
Tdis < Tc + 17˚C
Discharge temperature Outdoor unit’s EEV
Normal SH control
Tdis > Tc + 18˚C
Normal operation
Tdis < Tc + 17˚C
Discharge temperature Indoor unit’s EEV
Normal operation
Tdis > Tc + 18˚C
Function