Issue:
What can cause an CbF or circuit breaker error on the ATV630 and ATV930 Process drives?

Product Line:
Altvar Machines, Altivar Process Drives

Environment:
All models and serial numbers

Cause:
Inop motor circuit breaker
No mains voltage present
When running if the VBUS is less than USFH after the LCT monitor mains time out.
When stopped  if the ULN is greater than 20vac the error will occur after the LCT Mains time out.

Resolution:
Check the mains voltage
Check the main circuit breaker to see if its tripped.

Released for: Schneider Electric Singapore