Oil Return Control On Heating Mode - LG multi V PLUS Service Manual

Function
Indoor unit
Fan
Thermo on unit
LEV
Thermo off unit
LEV
Oil return operation time : 3 min for running step
Oil return operation skip condition : if liquid injection begins, Oil return operation goes to ending operation

2.1.2 Oil return control on heating mode

Component
Inv Compressor
Sub unit 's
compressor
Fan
Main LEV
4 way valve
Subcooling LEV
Hot gas bypass
valve
Indoor unit
Fan
Thermo on unit
LEV
Thermo off unit
LEV
Oil return operation time : 3 min for running step
Oil return operation skip condition : if liquid injection begins, Oil return operation goes to ending operation
206 Outdoor Unit
Starting
Keep state
Oil return
pulse
Close pulse
Starting
30 Hz
All off
0 Hz
Full open
On off
min.
On
Starting
Off
Oil return
pulse
Heating close pulse
Running
Keep state
Oil return operation
pulse
Oil return operation
pulse
Running
60 Hz
On
High pressure
control
Full open
Off
min.
On
Running
Off
Oil return operation
pulse
Oil return operation
pulse
Ending
Keep state
Return to
base pulse
Close pulse
Ending
30 Hz
Off
High pressure
control
Base pulse
On
min.
On
Ending
Off
Return to
base pulse
Heating close pulse