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    How can I troubleshoot an Altivar Process Drive with an Output Phase Fault?

    Issue:
    How can I troubleshoot an Altivar Process Drive with an Output Phase Fault?

    Product Line:
    Altivar Process Drive (ATV630, ATV930, ATV650, ATV950, ATV660, ATV960, ATV680, ATV980)

    Environment:
    All serial numbers for Altivar Process Drive

    Cause:
    N/A

    Resolution:
    [Single Output Phase Loss] OPF1
    Principle:

    • This fault appears when one motor phase is lost at the output of the inverter
    Probable cause:
    • Loss of a phase at the output of the inverter
    Remedies:
    • Check the connections between the inverter and the motor
    • Check output current for an imbalance in one phase

    [Output Phase Loss] OPF2
    Principle:
    • This fault appears when 3 motor phases are lost at the output of the inverter.
    Probable cause:
    • Motor not connected or motor output power is too low.
    • Motor or drive output contactor is open.
    • Unstable motor currents.
    Remedies:
    • Check the connections between the inverter and motor.
    • If using a motor contactor set parameter OPL (motor phase loss) to OAC or turn off OPL and use separate motor overloads
      • To turn off OPL: [Complete settings] [Error/Warning handling] [Output phase loss]
    • Test drive with no motor. Turn off OPL and run drive open circuit and test voltage on output for balancing
    • Check motor parameters and try to apply autotuning if possible:
      • Verify and optimize the following parameters: [IR compensation] UFr, [Nom Motor Voltage] UnS and [Rated mot. current] nCr and perform [Autotuning] tUn.
    • Check or extend Output Phase Loss Time Detect [OutPhaseLoss Delay] Odt
    • If intermittent or able to run at times without faulting then check motor currents.

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