Frequently asked questions
What can cause an OC3 fault on the ATV21 and ATV212 drives?
FA272103
28 July 2022
Issue:Why does OC3 trips on the ATV21/ATV212 drives?
Product Line:
Altivar ATV21 ATV212 S-Flex
Environment:
All models
Cause:
The drive is running and intermittently trips on the OC3 fault.
Resolution:
OC3 means overcurrent during constant speed operation.
Possible causes:
Abrupt fluctuations in the load or abnormal load conditions.
Remedies:
Reduce the load fluctuations
Check your load
Set parameter F316 to 1 or 3
OC3 can be cleared by Auto Restart as long as the condition that causes the fault is resolved.
To turn on Auto Restart set F303 to any value between 1 and 10. This value is the number attempts to clear the fault.