ABB Error 34255 — Rectifier / cooling fault
ErrorABB 34255 (“Rectifier / cooling fault”): Excessive rectifier temperature. Likely part: Redresseur / Ventilation (rectifier / cooling).
Updated 2026-10-22 · LogrobotLM reference
What it means
Excessive rectifier temperature.
What to check
- Check the fans, air circulation, ambient temperature and prolonged torque/load; clean the heat sinks and look for thermal overload.
- Note: Applicable to IRC5 architectures that have the module/rectifier concerned.
Part to check / replace
ABB 34255 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →