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FANUC Alarm VISN-001 — WARN Vision diagnostics failed

FANUC VISN-001 (“WARN Vision diagnostics failed”): The hardware diagnostics executed by the V-400i system powerup failed. First check: Replace the V-400i board set, if possible, or call your FANUC Robotics service representative.

Updated 2026-09-17 · LogrobotLM reference

Description

The hardware diagnostics executed by the V-400i system powerup failed.

Remedy

Replace the V-400i board set, if possible, or call your FANUC Robotics service representative.

Related codes

VISN-002PAUSE Offset unknown-feature missingVISN-003WARN Feature not found in the image

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 →