LG MULTI V Service Manual page 53

2. Special Control
2.1 Oil Return/Defrost Control
Component
Inverter compressor
High pressure gas valve
Low pressure gas valve
Balancing valve
2.2 Liquid Bypass Control
2.3 Subcooling EEV Control
Target : about 25 ℃(77 ℉)
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
Starting
Stop
Keep
Keep
Open for 30s
Indoor units operating
Are whole indoor units
operating
cooling mode?
Yes
Solenoid valve open
for liquid bypass
(High pressure gas →
Low pressure gas valve)
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Running
60 Hz
Close
Open
Close
No
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Functions
Ending
40 Hz
Open or Close
Open or Close
Close