FANUC Alarm APSH-052 — WARN Critical UOP inputs are LOW

FANUC APSH-052 (“WARN Critical UOP inputs are LOW”): UOP inputs #1 (IMSTP), #2 (HOLD), #3(SFTYFNC), #8 (ENBL) are all LOW. First check: See for APSH-051, Connect or deassign UOP inputs.

Updated 2026-09-17 · LogrobotLM reference

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 →