FANUC Alarm OS-002 — WARN System error - invalid function performed
FANUC OS-002 (“WARN System error - invalid function performed”): The function performed by the user is not supported or is invalid. First check: Consult the appropriate manual and verify the useage of the attempted operation.
Updated 2026-09-17 · LogrobotLM reference
Description
The function performed by the user is not supported or is invalid.
Remedy
Consult the appropriate manual and verify the useage of the attempted operation. Try it again, if possible. If you try again and still get this error, record the events that led to the error and contact your FRNA tech representative.
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 →