Defrost - LG Multi V Manual

Function

2.2 Defrost

Defrost operation eliminates ice attached on heat exchanger, recovering performance of heat exchanger.
Each cycle component operates as following table during defrost operation.
Outdoor Unit
Component
Inverter 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 Ending condition
1) All heat exchanger pipe temperature are above 15°C(59°F)(U3) 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
0Hz ¡ Normal control ¡ 700 RPM
Normal control
Normal control
Normal control
ON
ON
Starting
Normal control
Normal control
Min. pulse
OFF
- 20 -
Running
Setting Value
Max. pulse
Normal control
ON ¡ OFF ¡ ON
ON
Running
OFF
1200 pulse
1200 pulse
ON
Ending
30Hz
Normal control
200 pulse
Normal control
ON
ON
Ending
Normal control
Normal control
Min. pulse
OFF
LGE Internal Use Only