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ABB Error 34203 — Motor / Drive Unit fault

Error

ABB 34203 (“Motor / Drive Unit fault”): Motor current too high on a joint. Likely part: Moteur / Drive Unit (motor / Drive Unit).

Updated 2026-10-22 · LogrobotLM reference

What it means

Motor current too high on a joint.

What to check

  • Check the motor configuration, load/mechanical binding or collision, motor-drive sizing, phase-to-phase/phase-to-earth short circuit and the motor/cable resistance with the power off.
  • Note: To be distinguished from 34316: 34203 indicates excessive motor current; 34316 concerns a torque current deviation.

Part to check / replace

ABB 34203 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

Same hardware involved

34317Moteur / Drive Unit

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 →