LG Multi V Manual page 81

Error
Error Type
No.
Inverter DC link high
28
voltage error
I Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
Yes
Is inverter PCB assembly normal?
Yes
Recheck power and installation condition
Measuring input voltage
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Error Point
Inv PCB DC link voltage
supplied over 780V
Check
L(1), L(2) phase is 208/230V ±10%
No
¡ Check connection condition and wiring if power is
abnormal
No
Replace inverter PCB assembly
Noise filter wiring
L1
L2
- 81 -
Troubleshooting Guide
Main Reasons
1. Input voltage abnormal (L(1),L(2))
2. ODU inverter PCB damage
(DC Link voltage sensing part)
L1
L2
LGE Internal Use Only