FANUC Alarm PRIO-603 — PRIO-603
Manufacturer wording — %s
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PRIO-603 (“PRIO-603”): An internal system error has occured. First check: Consult FANUC representative.
Updated 2026-09-17 · LogrobotLM reference
Description
An internal system error has occured.
Remedy
Consult FANUC representative. Note the numeric value displayed with the error. This data will be needed to further diagnose the problem.
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 →