
Troubleshooting Guide
- 93 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
5) Troubleshooting CH21
U-V
V-W
W-U
U-GND
V-GND
W-GND
2MΩ
2MΩ
2MΩ
1.843
1.893
1.812
1.08
1.12
1.09
Terminal 5KD240XBA 5JD420XBB
Resistance(Ω) at 20°C
Inverter Comp.Terminal
Resistance(Ω) at 20°C
Ω
Comp
Copper
pipe
V
U
W
Ω
Comp
21
DC PEAK
(IPM Fault)
• Instant over current
• Over Rated current
• Poor insulation of IPM
• An instant over current in the U,V,W phase
- Comp lock
- The abnormal connection of U,V,W
• Over load condition
- Overcharging of refrigerant
Pipe length.
Outdoor Fan is stop
• Poor insulation of compressor
Display
code
Title Cause of error Check point & Normal condition
Check Point
1. Check the wire connection. (U,V,W)
2. Check the load condition. (Refrigerant, Pipe length, ...) Adjust the load condition
3. Check the electricity leakage of the compressor. Normal : Over 2MΩ.
4. Check the resistance of compressor.
5. Check the IPM circuit.(Continue next page)
Kommentare zu diesen Handbüchern