FANUC Alarm FILE-009 — WARN Illegal logical unit number
FANUC FILE-009 (“WARN Illegal logical unit number”): Illegal LUN is used. First check: This is an internal error.
Updated 2026-09-17 · LogrobotLM reference
Description
Illegal LUN is used.
Remedy
This is an internal error. Check the validity of the logical unit number.
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 →