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    What does an OBF fault code mean on the ATV58 drives?

    Issue:
    What does an OBF fault mean on the ATV58 drives?

    Product Line:
    Altivar ATV58

    Environment: 
    All types

    Cause:
    OBF is over braking fault

    Resolution:
    Check the DEC time setting on the drive.  If it is very low, try increasing to allow the drive a longer ramp down time.

    Check the Line voltage on L1 L2 L3 to verify that it is within specifications.  High line voltage will translate to high DC bus voltage.

    ​Would suggest to monitor the DC bus voltage. 

    If  OBF appears on power up, verify that the display is not set to show the last fault on power up.

    A dynamic brake resistor may be required if the load is overhauling.

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