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ABB Error 34257 — Bleeder resistor fault

Error

ABB 34257 (“Bleeder resistor fault”): Infinite resistance (open circuit) detected on the bleeder connected to the power rectifier. Likely part: Résistance de Bleeder (bleeder resistor).

Updated 2026-10-22 · LogrobotLM reference

What it means

Infinite resistance (open circuit) detected on the bleeder connected to the power rectifier.

What to check

  • Check the bleeder resistor and its wiring.
  • DANGER: The DC bus will remain charged at high voltage!
  • Note: Equivalent to the S2/S3 shunt overheating faults 594.

Part to check / replace

ABB 34257 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 →