MBT Lighting RSP844 - Manual (Page 2)

If the unit does not function at all when plugged in and the “circuit breaker reset” on the Relay
Pack has been reset then it is highly likely that the fuse is blown.
Unplug the unit before attempting to replace the fuse.
To replace the fuse, unscrew the “fuseholder” on the back of the ‘Switch Panel’ to reveal the fuse.
It is important that the replacement fuse is of the correct rating (3amp). Failure to use the correct
fuse could damage the unit beyond economic repair.
Place the new fuse in the fuseholder, and screw the cap back snugly.