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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Outdoor Unit
Indoor Unit
OFF
Min. pulse
Normal control
Normal control
Ending
ON
1200 pulse
1200 pulse
OFF
Running
OFF
Min. pulse
Normal control
Normal control
Starting
Hot gas bypass valve
4way valve
Subcooling EEV
Main EEV
Fan
Inverter compressor
Component
ON
ON
Normal control
Normal control
Normal control
30Hz
Starting
ON
Normal control
Max. pulse
Setting Value
Running
ON
ON
200 pulse
Normal control
Normal control
30Hz
Ending
Oil return signal
Thermo off unit EEV
Thermo on unit EEV
Fan
Component
0Hz → Normal control → 700 RPM
ON → OFF →
ON
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.
■ 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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