Old Hand Fault Finder

Allen-Bradley PowerFlex 525 F100: Parameter Chksum

What it means The drive's non-volatile parameter storage is corrupted.

✓ Checked against the manual (Oct 2026): meaning and actions match the official fault table. Manual page.

Likely causes

  • Memory corruption

Checks, in order

  1. Set P053 Reset To Defalts to 2 Factory Rset, then reload your parameters
  2. Call the vendor if it repeats

Source

Source (reworded, not copied): Rockwell Automation, PowerFlex 520-Series AC Drives User Manual, publication 520-UM001O-EN-E (September 2025), Chapter 4 Troubleshooting, PDF page 163. Official manual (PDF). Fault numbers and names can differ between firmware versions.