LG ABNW85GB9A0 Svc Manual page 72

6.6 Troubleshooting Outdoor Error
CH 29 (Compressor Over Current)
Flow of trouble diagnosis
Is installation
condition normal?
Yes
Are the resistance
Between each phase and
insulation resistance of Inverter
compressor normal?
Yes
Is compressor
Wire connection
condition normal?
Yes
Is input voltage normal?
Yes
Is Inv. PCB normal?
Yes
Recheck power and installation condition
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1. Check Pipe clogging/distortion
2. Check Covering (Indoor/Outdoor Unit)
No
3. Check EEV connector assemble
condition/normal operation
4. Check refrigerant pressure
→ Reassemble or manage if abnormality found
1. Check resistance between each terminal of
compressor (Refer to the right side tables.)
No
2. Check insulation resistance between compressor
terminal and pipe (over 50m)
→ Replace compressor if abnormality found
1. Check Inv. PCB U,V,W connector
connection condition
No
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition
(bad contact)
→ Reassemble if abnormality found
Check
R~S/S~T/T~R phase voltage is 380V 10%
No
R~N/S~N/T~N phase voltage is 220V 10%
→ Check connection condition and wiring if power
is abnormal
No Check Inv. PCB IGBTM normality
→ Replace Inv. PCB
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Part 4 Trouble Shooting
JBA068MAF
Temp 25°C 75°C
U-V 0.163 ± 7% Ω 0.195 ± 7% Ω
V-W 0.163 ± 7% Ω 0.195 ± 7% Ω
W-U 0.163 ± 7% Ω 0.195 ± 7% Ω
LGE Internal Use Only