Old Hand Fault Finder

Yaskawa GA500 LF: Output Phase Loss

Cites the manual · line-by-line check pending

What it means An output phase to the motor is open.

Likely causes

  • Loose lead
  • Open winding
  • Output contactor

Checks, in order

  1. Check terminals and winding resistance

Source

Source (reworded, not copied): Yaskawa, GA500 Drive Maintenance & Troubleshooting Manual, TOEPYAIGA5001A, Faults. Official manual (PDF). Fault numbers and names can differ between firmware versions.