LogrobotLM

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ABB Error 594 — Shunt resistor fault

Error

ABB 594 (“Shunt resistor fault”): Excessive temperature of the shunt resistor that absorbs the braking energy. Likely part: Résistance de Shunt (shunt resistor).

Updated 2026-10-22 · LogrobotLM reference

What it means

Excessive temperature of the shunt resistor that absorbs the braking energy.

What to check

  • Check the rectifier input voltage.
  • Reduce the robot accelerations.
  • Note: Will become the bleeder resistor overload error (39444) or the bleeder open circuit error (34257) on IRC5.

Part to check / replace

ABB 594 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

508Floppy disk drive fault509Axis / resolver fault510CPU / PROM 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 →