LogrobotLM — AI fault diagnosis for ABB · KUKA · FANUC robots. It reads your robot backup in your browser (never uploaded) and pinpoints the fault. Try it free →

FANUC Alarm GUID-100 — WARN Unknown error

FANUC GUID-100 (“WARN Unknown error”): An internal error has occured. First check: Cold start the controller

Updated 2026-09-17 · LogrobotLM reference

Description

An internal error has occured.

Remedy

Cold start the controller

Related codes

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 →