1. Power the controller down by unplugging the unit, or flipping the Primary Power ON/OFF switch in the bottom right to OFF
2. Slide the FUSE compartment door to the right to expose the fuse
3. Remove the fuse by pulling it out
4. Insert a new fuse by firmly pressing it in
5. Power the controller back on
SL4800 / SL9600 Fuses (1.5A, Slow-Blow)