Defrost - LG MULTI V Service Manual

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
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 Ending condition
1) All heat exchanger pipe temperature are above setting temperature for 30 seconds.
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.
Starting
30 Hz
OFF
300 pulse
Min. pulse
OFF
OFF
Starting
Normal control
Normal control
60~100 pulse
- 22 -
Running
Setting Value
Normal control
Max. pulse
Min. pulse
OFF
OFF
Running
Normal control
400~800 pulse
400~800 pulse
Copyright © 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Ending
40 Hz
OFF
200 pulse
Min. pulse
ON
OFF
Ending
Normal control
1200 600
Normal Control
1200 600
60~100 pulse