FANUC Alarm OPTN-000 — WARN Unknown error (OPTN)
FANUC OPTN-000 (“WARN Unknown error (OPTN)”): System internal error. First check: Perform a cold start: 1.
Updated 2026-08-29 · LogrobotLM reference
Description
System internal error.
Remedy · Remède
Perform a cold start: 1. Turn off the robot. 2. On the teach pendant, press and hold the SHIFT and RESET keys. 3. While still pressing the SHIFT and RESET keys, turn on the robot. If the error is not cleared, document the events that led to the error and call your FANUC Robotics technical representative.
Frequently asked · Questions fréquentes
- What does FANUC alarm OPTN-000 mean?
- FANUC OPTN-000 (“WARN Unknown error (OPTN)”): System internal error.
- How do you troubleshoot FANUC alarm OPTN-000?
- Perform a cold start: 1. Turn off the robot. 2. On the teach pendant, press and hold the SHIFT and RESET keys. 3. While still pressing the SHIFT and RESET keys, turn on the robot. If the error is not cleared, document the events that led to the error and call your FANUC Robotics technical representative.
Related codes / Codes liés
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 →