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    What is a TJF fault on the ATV61 and ATV71 drives?

    Issue:
    What is an TJF fault on the ATV61 and ATV71 drives?

    Product Line:
    Altivar ATV61 and ATV71

    Environment:
    All

    Cause:
    TJF means IGBT overheating caused by drive overheating

    Resolution:
    This fault appears when the estimated temperature of an IGBT is too high.  It is a calculated measurement based on the switching frequency, drive output frequency, and motor current.
    Check the size of the load, motor, and drive.
    Reduce the switching frequency in menu 1.4
    Wait for the motor to cool before trying to restart the drive.

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