FANUC Alarm PRIO-093 — Fuse blown Rack:… Slot:…
Error- Hardware
- fuses
- Controllers
- R-30iA (this generation only)
- FANUC class
- STOP
- Hardware family
- FANUC I/O Link, process I/O board, fuse and output alarms
Manufacturer wording — Fuse blown Rack:%d Slot:%d
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC PRIO-093 (“Fuse blown Rack:… Slot:…”): Fuse on process I/O board is blown. First check: Please replace the fuse. Likely part: Fuse (Fuse).
Updated 2026-10-22 · LogrobotLM reference
Description
Fuse on process I/O board is blown.
Remedy
Please replace the fuse.
Field diagnosis
A fuse on the reported process board has blown.
What to check
- Identify the short circuit on the outputs of this board, then replace the fuse.
- Note: The rack and slot in the message identify the board.
Part to check / replace
FANUC PRIO-093 points to the hardware below — start here before ordering.
Tap a part for every code that points to it — and verify the exact variant for your controller before ordering.
Related codes
Same hardware involved
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 →