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Copyright ©2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Functions
2.1 Oil Return/Defrost Control
2.2 Liquid Bypass Control
2.3 Subcooling EEV Control
Target : about 25°C
Subcooling EEV works with Fuzzy rules to keep the degree of subcooling at the outlet of subcooler during
simultaneous operation
The degree of subcooler = T outlet of subcooler – T inlet of subcooler
Open or CloseCloseKeepHigh pressure gas valve
Close
Open
60 Hz
Running EndingStartingComponent
40 HzStopInverter compressor
Open or CloseKeepLow pressure gas valve
CloseOpen for 30sBalancing valve
Are whole indoor units
operating
cooling mode?
Solenoid valve open
for liquid bypass
(High pressure gas →
Low pressure gas valve)
Indoor units operating
Yes
No
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