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ABB Error 34423 — Drive units fault

Error

ABB 34423 (“Drive units fault”): The axis drive cabinet contains incompatible drive unit models (e.g. Likely part: DSQC462 (drive unit).

Updated 2026-10-22 · LogrobotLM reference

What it means

The axis drive cabinet contains incompatible drive unit models (e.g. DSQC462).

What to check

  • Check the software configuration and make sure that compatible cabinet drive units are inserted.
  • Note: Equivalent to drive unit incompatibilities.

Part to check / replace

ABB 34423 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

34100Drive system fault34200Axis Computer / Drive Units fault34201Drive Unit fault

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 →