OHF

Drive Overheating

Schneider Electric · Altivar Machine ATV320 Variable Speed Drive

What does OHF mean?

The drive has detected an internal overheating condition. This occurs when the drive's internal temperature exceeds safe operating limits, often due to high ambient temperatures, blocked cooling fins, or failed cooling fans. Continued operation can lead to permanent damage to the drive's power components.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Clean drive heatsinks and ventilation openings to ensure proper airflow.

  2. 4

    Ensure sufficient clearance around the drive for cooling and avoid mounting in direct sunlight or confined spaces.

Source: Schneider Electric Altivar Machine ATV320 Variable Speed Drive
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