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

    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 or try setting the parameter F316 to 1 or 3.

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