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Best and quickest remedy would be to call Tiffin customer support. Do you have and know how to use a multimeter? There are going to be multiple over current protection devices. Also make certain you have a good ground to the system. Does the control pad light up? If not start at the battery control center for a blown fuse. If the control pad does light up by no response; check for a circuit breaker closer to the battery bank.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7