Troubleshooting Guide
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28*
Master
281
Slave1
282
Slave2
283
Slave3
284
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 (R,S,T,N)
2. ODU Comp PCB damage
(DC Link voltage sensing part)
n Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Recheck power and installation condition
Check
R~S/S~T/T~R phase voltage is 380V 10%
R~N/S~N/T~N phase voltage is 220V 10%
→ Check connection condition and wiring if power is
abnormal
Is Converter PCB assembly
normal?
No
Yes
Replace Converter PCB assembly
1. Check R/S/T/N wiring conditions
2. Check Noise filter wiring conditions
→ Rewire them if abnormality found.
No
Yes
Replace Comp PCB assembly
Is Comp PCB assembly normal?
No
Yes
* Measuring input voltage
* Noise filter wiring
Are there any power wire
connections normal?
R S
T N
R
S
T
N
R S
T N
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