Oil Equalizing Control - LG ARUV Series Service Manual

Function
Indoor unit
Fan
Thermo on unit
EEV
Thermo off unit
EEV
Ending condition
1) All Heat exchanger pipe temperature are above 15˚C for 30 sec.
2) The running time of defrost operation is over 30% of the total heating time
3) If liquid injection begins.

2.3 Oil equalizing control

2.3.1 Oil equalizing control on cooling mode
Component
Inv Compressor
Sub unit
compressor
Fan
Main EEV
4 way valve
Subcooling EEV
Hot gas bypass
valve
Indoor unit
Fan
Thermo on unit
EEV
Thermo off unit
EEV
Ending condition
1) About 4min after control begins
Starting condition:every 2hours operation with constant compressors.
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Only for training and service purposes
Starting
Off
Oil return
pulse
Heating close pulse
Starting
Equalizing control Equalizing control
Equalizing control Equalizing control
High pressure
control
Full open
Off
Subcooling control Subcooling control
Off
Starting
Normal
Normal
min. pulse
- 204 -
Running
Off
Oil return operation
pulse
Oil return operation
pulse
Running
Equalizing control
Equalizing control
High pressure High pressure
control
Full open
Off
Subcooling control
Off
Running
Normal
Normal
min. pulse
Ending
Off
Return to
base pulse
Heating close pulse
Ending
control
Full open
Off
Off
Ending
Normal
Normal
min. pulse
LGE Internal Use Only