FANUC Alarm APSH-022 — WARN Safety fence is open
FANUC APSH-022 (“WARN Safety fence is open”): The safety fence input is LOW. First check: The safety fence input must be ON to resume normal robot operation.
Updated 2026-09-17 · LogrobotLM reference
Description
The safety fence input is LOW.
Remedy
The safety fence input must be ON to resume normal robot operation. Raise the safety fence input.
Related codes
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 →