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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 SYST-174 — SYSTEM Invalid SYST - CTRL start Req

FANUC SYST-174 (“SYSTEM Invalid SYST - CTRL start Req”): S/W Registration is in effect and a system update is pending. First check: Perform a Controlled start to resolve this problem:

Updated 2026-08-29 · LogrobotLM reference

Description

S/W Registration is in effect and a system update is pending.

Remedy · Remède

Perform a Controlled start to resolve this problem:

Frequently asked · Questions fréquentes

What does FANUC alarm SYST-174 mean?
FANUC SYST-174 (“SYSTEM Invalid SYST - CTRL start Req”): S/W Registration is in effect and a system update is pending.
How do you troubleshoot FANUC alarm SYST-174?
Perform a Controlled start to resolve this problem:

Related codes / Codes liés

SYST-172PAUSE S/W Registration has expiredSYST-173WARN See S/W Reg Screen (STATUS)SYST-175WARN System was updatedSYST-176Software was updated

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 →