FANUC Alarm SRVO-008 — SERVO Brake fuse blown
Error- Hardware
- motor brakes
- Controllers
- R-J3iB / R-30iA
- FANUC class
- SERVO
- Hardware family
- FANUC brake, fuse, robot signal and position error alarms
FANUC SRVO-008 (“SERVO Brake fuse blown”): The brake fuse is blown on the EMG Control PCB. First check: Replace the fuse. Likely part: Fuse (Fuse).
Updated 2026-10-22 · LogrobotLM reference
Description
The brake fuse is blown on the EMG Control PCB.
Remedy
Replace the fuse. Check the LED (FALM) on the printed circuit board for emergency stop control to determine whether the fuse has blown.
Field diagnosis
The brake circuit fuse located on the emergency stop control board has blown.
What to check
- Confirm with the fuse fault LED on the board, and find the cause (short-circuited brake cable, brake coil) before replacing the fuse.
- Note: R-J3iB/R-30iA generation; on R-30iB, the brake circuit goes through the amplifier (SRVO-018).
Part to check / replace
FANUC SRVO-008 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 →