LG MULTI V M ARNU07GTU 4 Series Svc Manual page 74

Troubleshooting Guide
Error
Error Type
No.
ODU 3phase power
501
omission error
n Error Diagnosis and Countermeasure Flow Chart
Are there any power wire
connections normal?
Yes
Is input voltage normal?
Yes
Is Inv. PCB
normal?
Yes
INV. PCB LED display error
Yes
Recheck power and installation condition
* Measuring input voltage
Error Point
Omitting one or more of
R,S,T input power
No
1. Check R/S/T/N wiring conditions
→ Rewire them if abnormality found.
Check
R~S/S~T/T~R phase voltage is 380V±10%
R~N/S~N/T~N phase voltage is 220V±10%
No
→ Check connection condition and wiring if power is
abnormal
1. Check R~N/S~N/T~N phase voltage is
220V±10%
No
2. Check Inv. PCB assemblywire
disconnection and wiring
→ Reassemble if abnormality found
No
Replace Inv. PCB assembly.
* Noise filter wiring
R S T
R S T
- 74 -
Main Reasons
1. Input Voltage abnormal (R,S,T,N)
2. Check power Line connection condition
3. Inv. PCB damage
4. Inv. PCB input current sensor fault
* Field Fault Case
N
Copyright © 2018 LG Electronics Inc. All rights reserved.
Only training and service purposes.
* R-Phase Terminal
Changed Color.