PHF

Input Phase Loss

Schneider Electric · Altivar Machine ATV320 Variable Speed Drive

What does PHF mean?

Detection of a loss of one or more phases in the main input power supply to the drive. This causes unbalanced operation, potentially damaging the drive's input rectifiers or internal DC bus capacitors. The drive will trip to protect itself and upstream equipment.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Inspect upstream circuit breakers, fuses, or contactors for tripped states or damage.

  2. 4

    Ensure the mains power supply is stable and free from voltage sags or interruptions.

Source: Schneider Electric Altivar Machine ATV320 Variable Speed Drive
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