LG ARUV Series Service Manual page 208

Function
2.4.3 Stopping operation of sub units when only main unit operates
Component
Sub unit
compressor
Fan
Main EEV
way 4valve
Hot gas bypass
Subcooling EEV
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Only for training and service purposes
Operation
Off
Depends on
main unit fan frequency
Full open(cooling)
SH control(heating)
Same state to main unit
Normally Off
Subcooling control(cooling)
min. pulse(heating)
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Note
If liquid injection on :
max. pulse is 350
else : 300 pulse
LGE Internal Use Only