LG MULTI V IV ARNU07GTU 2 Series Service Manual page 22

Function
2.2 Defrost
Defrost operation eliminates ice accumulated on heat exchanger, recovering performance of heat exchanger.
Each cycle component operates as following table during defrost operation.
Outdoor Unit
Component
Inv Compressor
FAN
Main EEV
Subcooling EEV
4way valve
Indoor Unit
Component
Fan
Thermo on unit EEV
n Ending condition
1) All heat exchanger pipe temperature are above setting temperature for 30 sec.
2) The running time of defrost operation is over 30% of the total heating time
3) If compressor protection control starts by high discharge temperature of compressor etc.
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Only for training and service purposes
Starting
30Hz Setting Value
Stop High pressure control
Normal control
Normal control
On → OFF
Starting
OFF
Normal control 400~800 pulse
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Running
Normal control
Max. pulse Normal control
Min. pulse Normal control
OFF
Running
OFF
Normal control
LGE Internal Use Only
Ending
40Hz
ON
Ending
OFF