Special Control; Oil Return Control - LG ARUV Series Service Manual

Function

2. Special control

2.1 Oil return control

2.1.1 Oil return 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
Oil return operation time : 3 min for running step
Starting condition:every 6 hours operate
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Only for training and service purposes
Starting
45 Hz
All off
High pressure
0 Hz
Full open
Off
min.
Suction pipe temp.
Off
control
Starting
Keep state
Oil return Oil return operation
pulse
Oil return operation
Close pulse
- 200 -
Running
60 Hz
On
High pressure
control
Full open
Off
min.
Running
Keep state
pulse base pulse
Close pulse
pulse
Ending
40 Hz
Off
control
Full open
Off
min.
Off
Ending
Keep state
Return to
LGE Internal Use Only