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What can cause an OC3 fault on the ATV21 and ATV212 drives?

Published date: 20 February 2019

Issue:
What can cause an OC3 fault on the ATV21 and ATV212 drives?

Product Line:
Altivar ATV21 ATV212 S-Flex

Environment:
All

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. 

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