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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 2026-09-17 · LogrobotLM reference

Description

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

Remedy

Perform a Controlled start to resolve this problem:

Related codes

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. How this reference is built →