Something is causing a draw in excess of 30 amps. If the circuit board is protected at 30 amps surely the equipment is designed to operate at 22 to 26 amps maximum. Besides the board itself it is just the motor so my inclination is to reinspect the wiring and connections but most likely replace the motor. A motor can seem to run fine and still have some internal short. For all know the board itself could be drawing the extra power and should be replaced.
Continuing to just replace fuses on the board is insanity. Adding circuit protection to save the fuse will be fruitless.
