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ABB Error 38218 — Robot axis encoder fault

Error

ABB 38218 (“Robot axis encoder fault”): Excessive temperature detected at the encoder of a robot axis. Likely part: Robot axis encoder.

Updated 2026-10-23 · LogrobotLM reference

What it means

Excessive temperature detected at the encoder of a robot axis.

What to check

  • Allow the robot to cool down.
  • Reduce the ambient temperature and the program dynamics.
  • Note: Similar to motor overheating on axis cabinets.

Part to check / replace

ABB 38218 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

20032Revolution counter not updated20033Axis not synchronized38034Axis Computer / SMB / Serial measurement cable 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 →