Trouble Shooting Guide
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28
Inverter DC link high
voltage error
Display
code
Title
Cause of error
Check point & Normal condition
Inv PCB DC link voltage
supplied over 780V
1. Input voltage abnormal (L~N)
2. ODU inverter PCB damage
(DC Link voltage sensing part)
※ It is related to “AHBW**6*0” model.
n Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Recheck power and installation condition
• For single phase : check L-N phase is 220V±10%
• For triple phase : check R-N, S-N, T-N phase are
220V±10% and R-S, S-T, T-R phase are 380V±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
LN G
LNG
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