FANUC Alarm ARC-008 — STOPL Power supply fault

Manufacturer wording — STOPL Power supply fault (%s^4,%d^5)
The manual prints placeholders; your controller fills them in with the real group, axis or number.

FANUC ARC-008 (“STOPL Power supply fault”): A power fault input was detected during welding. First check: Check if weld controler is functioning correctly, or powered on.

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 →