ABB Error 39479 — Motor axis external fault
ErrorABB 39479 (“Motor axis external fault”): Excessive temperature measured via the PTC sensor of an external axis motor. Likely part: Moteur d'axe externe (motor axis external).
Updated 2026-10-22 · LogrobotLM reference
What it means
Excessive temperature measured via the PTC sensor of an external axis motor.
What to check
- Check that there is no mechanical binding on the external axis.
- Allow to cool down.
- Note: Equivalent to drive axis motor overheating.
Part to check / replace
ABB 39479 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
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 →