F8
Heatsink OvrTmp
Allen-Bradley · PowerFlex 4 Adjustable Frequency AC Drive
What does F8 mean?
This fault indicates that the drive's heatsink temperature has exceeded its safe operating limit. Common causes include obstructions to airflow, accumulated dirt on the fins, or an ambient temperature that is too high.
Additional Steps
Steps 1–2 are listed in Priority Fix.
- 3
Check the operation of the cooling fan (if present) to confirm it is running and effectively dissipating heat.
Source: Allen-Bradley PowerFlex 4 Adjustable Frequency AC Drive
Open Manual (Page 15)