Special Control; Oil Return Control; Indoor Unit - LG ARWN038GA2 Service Manual

Function

2. Special control

2.1 Oil return control

2.1.1 Oil return control on cooling mode
Oil return operation recovers oil amount in compressor by collecting oil accumulated in pipe.
Each cycle component operates as following table during oil return operation.
Outside Unit
Component
Inv Compressor
Main EEV
4way valve
Hot gas bypass valve

Indoor Unit

Component
Thermo on unit EEV
Thermo off unit EEV
Oil return signal
■ Oil return operation time : 3min for running step
■ Starting condition:every 3hours operate
■ Oil return process ends if compressor protection control starts
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Only for training and service purposes
Starting
25Hz
Max. pulse
OFF
Normal control Normal control
Starting
Normal control
Min. pulse
OFF
- 18 -
Running
Setting Value
Max. pulse Max. pulse
OFF
Normal control
Running
1200 pulse Normal control
1200 pulse Min. pulse
ON
LGE Internal Use Only
Ending
40Hz
OFF
Ending
OFF