LG Multi V - Page 81

Troubleshooting Guide
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28
Inverter DC link high
voltage error
Error
No.
Error Type Error Point Main Reasons
Inv PCB DC link voltage
supplied over 780V
1. Input voltage abnormal (L(1),L(2))
2. ODU inverter PCB damage
(DC Link voltage sensing part)
■ Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Recheck power and installation condition
Check
L(1), L(2) phase is 208/230V ±10%
→ Check connection condition and wiring if power is
abnormal
Replace inverter PCB assembly
Is inverter PCB assembly normal?
No
Yes
Measuring input voltage
Noise filter wiring
L1
L2
L1
L2