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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 2026-08-29 · LogrobotLM reference

Description

Illegal LUN is used.

Remedy · Remède

This is an internal error. Check the validity of the logical unit number.

Frequently asked · Questions fréquentes

What does FANUC alarm FILE-009 mean?
FANUC FILE-009 (“WARN Illegal logical unit number”): Illegal LUN is used.
How do you troubleshoot FANUC alarm FILE-009?
This is an internal error. Check the validity of the logical unit number.

Related codes / Codes liés

FILE-007WARN Illegal device numberFILE-008WARN Illegal device nameFILE-010WARN Directory not foundFILE-011WARN Directory full

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. · Informations indicatives issues du terrain — le manuel du constructeur et ses procédures de sécurité font foi. Ne shuntez jamais un organe de sécurité ; consignez (LOTO) avant toute intervention physique. How this reference is built →