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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 → · Le diagnostic IA qui lit la sauvegarde de votre robot, sans rien téléverser.

FANUC Alarm HOST-103 — WARN Seek error

FANUC HOST-103 (“WARN Seek error”): There is a bad sector or track on the disk. First check: Clean the disk drive, try another disk, or reformat the disk.

Updated 2026-08-29 · LogrobotLM reference

Description

There is a bad sector or track on the disk.

Remedy · Remède

Clean the disk drive, try another disk, or reformat the disk.

Frequently asked · Questions fréquentes

What does FANUC alarm HOST-103 mean?
FANUC HOST-103 (“WARN Seek error”): There is a bad sector or track on the disk.
How do you troubleshoot FANUC alarm HOST-103?
Clean the disk drive, try another disk, or reformat the disk.

Related codes / Codes liés

HOST-101WARN Directory read errorHOST-102WARN Block check errorHOST-104WARN Disk timeoutHOST-105WARN Write protection violation

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 →