OHF

Drive Controller Overheat

Schneider Electric · ALTIVAR 28 Variable Speed Drive

What does OHF mean?

This fault indicates that the drive controller's internal temperature or its I²t thermal model has exceeded safe operating limits, leading to an overheat condition. Continuous operation in this state will cause irreversible damage to the drive's sensitive electronic components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Allow the drive controller to cool down completely before attempting to reset and restart operation.

Source: Schneider Electric ALTIVAR 28 Variable Speed Drive
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