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

Published date: 23 September 2019

Troubleshoot an Altivar Process Drive with an Input Phase Fault (PHF)

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

All serial numbers for Altivar Process Drive


  • Loss of one phase on the input side of the drive

Probable cause:
  • Drive incorrectly supplied or a tripped fused.
  • One phase missing.
  • 3-phase drive used on a single-phase supply mains.
  • Unbalanced load.
  • Check the power connection and the fuses.
  • Use a 3-phase supply mains.
  • Disable the detected error by [Input phase loss] IPL = [No] nO if single phase supply mains or DC
    bus supply is used for programming only

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