Fault diagnosis and Trouble shooting guide
Title
Display
code
Cause of errorMeaning
Is the voltage of DC
link normal?
Check and replace IPM and
capacitor
No
Yes
Is the starting relay
normal?
Yes
Check and replace the PCB
Is the connection of
R,S,T input power
normal?
Yes
Repair the connection
No
Check and replace PCB and
starting relay
No
DC link
23
• Poor connection on DC link terminal
• Malfunction of starting relay
• Malfunction of capacitor
• Abnormal in R,S,T connection
• Malfunction of IPM
• Malfunction of detection PCB
DC charging is not
performed for 45 sec. after
starting relay turn on (initial
charging is under 320VDC)
Trouble shooting Flow
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