Old Hand Fault Finder

Allen-Bradley PowerFlex 525 F008: Heatsink OvrTmp

Cites the manual · line-by-line check pending

What it means Drive heatsink got too hot.

Likely causes

  • Blocked fan or filters
  • High cabinet temperature
  • Dead drive fan

Checks, in order

  1. Clean filters/heatsink
  2. Check cabinet fans and AC
  3. Confirm drive fan spins

Old Hand tip

Clogged cabinet filter, almost every time.

Source

Source (reworded, not copied): Rockwell Automation, PowerFlex 520-Series AC Drives User Manual, publication 520-UM001O-EN-E (September 2025), Chapter 4 Troubleshooting. Official manual (PDF). Fault numbers and names can differ between firmware versions.