F8

Heatsink Over-temperature

Allen-Bradley · PowerFlex 40 Adjustable Frequency AC Drive

What does F8 mean?

The drive's heatsink temperature has exceeded its safe operating limit, indicating insufficient cooling. This can be caused by obstructions, high ambient temperatures, or a malfunctioning cooling fan. This is an Auto-Reset/Run type fault configurable with parameters A092 and A093.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Check the cooling fan operation to ensure it is spinning and moving air effectively.

Source: Allen-Bradley PowerFlex 40 Adjustable Frequency AC Drive
Open Manual (Page 17)