ABB Error 111858 — Power supply 5V WDU fault
ErrorABB 111858 (“Power supply 5V WDU fault”): WDU welding cabinet 5V logic supply voltage too low. Likely part: Alimentation 5V WDU (power supply 5V WDU).
Updated 2026-10-22 · LogrobotLM reference
What it means
WDU welding cabinet 5V logic supply voltage too low.
What to check
- Switch off the main switch to reset the WDU.
- Check the 5V power supply.
- Note: Similar to the S2/S3 I/O board power supply faults.
Part to check / replace
ABB 111858 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 →