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    What causes a OP3 fault on the ATV212 drive?

    Issue:
    What causes a OP3 fault on the ATV212 drive?

    Product Line:
    ATV21 ATV212 Altivar 212, Altivar 21 drives

    Environment:
    All models, All serial numbers

    Cause:
    OP3 fault is caused by overvoltage during constant speed operation.  This could be caused by abnormal fluctuation of the input voltage, Power networks greater than 200kVA, Power factor correction switching, SCR's switching on the Power network, the load regenerating into the drive or intermittent output phase loss. 

    Resolution:
    Confirm the motor nameplate information matches settings in the drive.  Confirm that the drive is sized correctly for the load and application.

    tYP = 2 (60Hz)
    tHr = motor FLA
    uLu = motor voltage
    F415 = motor FLA
    F417 = motor RPM

    Set F626 = 150% (increases the DC bus overvoltage threshold)
    Set AU1 = 0 (disables Auto ramp)

    Check the setting of Pt parameter (type of control) matches the application. 

    Check to make sure that the load is not spinning without drive's input (such as fan applications). If the load is spinning too fast in the wrong direction, the drive won't be able to catch it. If this is the case, try installing a mechanical brake to prevent this issue. 

    Check the setting of F301 Catch on the fly and try setting it to 4 (Each start)
     

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