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ABB Error 50055 — Joint load high

Error

ABB 50055 (“Joint load high”): Joint load high: the actual torque on the joint is too high. Likely part: Motor cable / gearbox / lubrication.

Updated 2026-10-22 · LogrobotLM reference

What it means

Joint load high: the actual torque on the joint is too high. Possible causes: incorrect load data, excessive acceleration, external process forces, low temperature, or hardware fault.

What to check

  • Check the loaddata and the tool.
  • Reduce speed/acceleration for testing.
  • Check the gearbox oil level and condition (oil congealed after a prolonged stop, leak).
  • Check the motor power cable — the most frequent hardware cause found during service.
  • Check the mechanical resistance by moving the axis with the brakes released.
  • Note: Common on axis 5 (wrist). See 50056 (axis torque), already listed.

Part to check / replace

ABB 50055 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

50021Axis servo control / Feedback / Mechanics fault50052Joint speed too high50056Joint collision detected

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 →