Technical FAQs

Ask a Question

How to troubleshoot an Altivar Process Drive with an Output Phase Fault

Issue:
How to troubleshoot an Altivar Process Drive with an Output Phase Fault (OPF1 and OPF2)

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. 
Was this helpful?
What can we do to improve the information ?