FANUC Alarm SRVO-220 — SDI fuse blown
Error- Hardware
- fuses
- Controllers
- R-30iA (this generation only)
- FANUC class
- SERVO
- Hardware family
- FANUC brake, fuse, robot signal and position error alarms
FANUC SRVO-220 (“SDI fuse blown”): The fuse for SDI has blown. First check: Replace the fuse on the main board or main board itself. Likely part: Main board (Main CPU board) +1 more.
Updated 2026-10-22 · LogrobotLM reference
Description
The fuse for SDI has blown.
Remedy
Replace the fuse on the main board or main board itself. Refer to the Mate Controller Maintenance Manual for more information.
Field diagnosis
The fuse protecting the SDI safety inputs has blown.
What to check
- Replace the fuse on the main board, or the main board itself if the fuse is not replaceable; look for the short circuit in the safety input wiring.
- Note: R-30iA (Mate) code.
Part to check / replace
FANUC SRVO-220 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 →