SRVO-228: RI/O fuse blown (FUSE4)
FUSE4 - protecting the +24V feeding the end-effector interface - has blown.
What it means
FUSE4 - protecting the +24V feeding the end-effector interface - has blown. Prime suspect: a short in the robot connection or end-effector cabling, i.e., out at the tooling where cables take abuse.
Common causes
Ranked by what technicians most often find, most likely first.
- RI/O or 24VR shorted to 0V in the robot connection cable or end-effector cable - gripper wiring damage is the classic.
- Main board fault (after image backup).
- Interface unit.
How to fix it
- With the controller de-energized and locked out, inspect the robot connection and end-effector cables end to end, flex points and the dress-out near the wrist first, and replace any damaged cable.
- Take an image backup with the controller powered, then de-energize and apply lockout/tagout again before replacing the main board.
- With the controller de-energized and locked out, replace the interface unit last.