LG ARUN Series Service Manual page 25

2.1.2 Oil return control on heating mode
Outdoor Unit
Component
Inv Compressor
Constant Speed Compressor
FAN
Main EEV
Subcooling EEV
4way valve
Hot gas bypass valve
Indoor Unit
Component
Fan
Thermo on unit EEV
Thermo off unit EEV
Oil return signal
I Oil return operation time : 3 min for running step
I Starting condition:same as cooling mode
I Oil return process ends if compressor protection control starts
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Only for training and service purposes
Starting
25Hz Setting Value
OFF
Normal control Normal control
Max. pulse
Normal control
OFF
Normal control Normal control
Starting
Normal control
Normal control
Min. pulse
OFF
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Running
ON
Normal control
Max. pulse Max. pulse
Min. pulse 100 pulse
ON
Normal control
Running
OFF Normal control
1200 pulse Normal control
1200 pulse Min. pulse
ON
LGE Internal Use Only
Function
Ending
25Hz
OFF
ON
Ending
OFF