LG MULTI V Service Manual page 21

2.1.2 Oil return control on heating mode
Outdoor Unit
Component
Inverter compressor
Fan
Main EEV
Subcooling EEV
4way valve 1
4way valve 2
Indoor Unit
Component
Fan
Thermo on unit EEV
Thermo off unit EEV
n Oil return operation time : 3 min for running step
n Starting condition:same as cooling mode
n Oil return process ends if compressor protection control starts
Starting
30 Hz
OFF
300 pulse
Min. pulse
ON
Heat Recovery : OFF
Heat pump : OFF
Starting
Normal control
Normal control
60~100 pulse
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Running
Setting Value
Normal control
Max. pulse
Min. pulse
OFF
OFF
Running
Normal control
400~800 pulse
400~800 pulse
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Function
Ending
40 Hz
OFF
200 pulse
Min. pulse
ON
OFF
Ending
Normal control
1200 600
Normal Control
1200 600
60~100 pulse