FANUC Alarm ARC-049 — WARN Process … switch to … failed
Manufacturer wording — WARN Process %d switch to %d failed
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC ARC-049 (“WARN Process … switch to … failed”): ArcTool failed to switch weld processes. First check: The weld power supply may be OFF, unconnected, or data in the second process may be incorrect.
Updated 2026-09-17 · LogrobotLM reference
Description
ArcTool failed to switch weld processes.
Remedy
The weld power supply may be OFF, unconnected, or data in the second process may be incorrect.
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 →