ABB Error 34318 — Drive Unit / motor / DC-link fault
ErrorABB 34318 (“Drive Unit / motor / DC-link fault”): The Drive Unit reaches its maximum output voltage: inverter saturation. Likely part: Drive Unit / Moteur / DC-Link (Drive Unit / motor / DC-link).
Updated 2026-10-22 · LogrobotLM reference
What it means
The Drive Unit reaches its maximum output voltage: inverter saturation.
What to check
- Check motor connection, motor parameters, DC link voltage, phase/ground short circuits and mains voltage; measure cable and motor with power off.
- Note: Fault often correlated with a motor/cable, DC link or configuration problem. Also observed during service work on additional axes.
Part to check / replace
ABB 34318 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 →