LG Multi V 5 - Page 51

100 101
_TROUBLE SHOOTING GUIDE BOOK _
- 117 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
* Measuring resistance
between each terminal of
compressor
* Compressor wire connection
- 116 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
26*
Master
261
Slave1
262
Slave2
263
Slave3
264
Inverter compressor starting
failure Error
Error
No.
Error Type Error Point Main Reasons
Starting failure because of
compressor abnormality
1. Overload operation
(Pipe clogging/Covering/EEV defect/Ref.
overcharge)
2. Compressor damage
(Insulation damage/Motor damage)
3. Compressor wiring fault
4. ODU Comp PCB damage (CT)
n Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal?
No
Yes
Yes
Recheck power and installation condition
1. Check Pipe clogging/distortion
2. Check Covering (Indoor/Outdoor Unit)
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
2. Check insulation resistance between compressor
terminal and pipe (over 50M )
→ Replace compressor if abnormality found
Are the resistance
Between each phase and
insulation resistance of Inverter
compressor normal?
No
Yes
No
Yes
1. Check Comp PCB assembly U,V,W connector
connection condition
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition
(bad contact)
→ Reassemble if abnormality found
Is compressor
Wire connection
condition normal?
No
Yes
Check Inverter PCB assembly IPM normality
→ Replace Inverter PCB assembly
Is Inverter PCB assembly normal?
No
Are there any power wire
connections normal?
1. Check R/S/T/N wiring conditions
→ Rewire them if abnormality found.
Compressor JQC068MA* JQC048MA*
Temp. 25℃ 75℃ 25℃ 75℃
U-V 0.216 ± 7% Ω 0.258 ± 7% Ω 0.302 ± 7% Ω 0.360 ± 7% Ω
V-W 0.216 ± 7% Ω 0.258 ± 7% Ω 0.302 ± 7% Ω 0.360 ± 7% Ω
W-U 0.216 ± 7% Ω 0.258 ± 7% Ω 0.302 ± 7% Ω 0.360 ± 7% Ω
Error No. Error Type Error Point Main Reasons
26*
Inverter compressor
starting failure Error
Starting failure because
of compressor abnor
-
mality
1. Overload operation
(Pipe clogging/Covering/EEV defect/
Ref. overcharge)
2. Compressor damage
(Insulation damage/Motor damage)
3. Compressor wiring fault
4. ODU Comp PCB damage (CT)
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Multi V 5
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