Without a clamp on amp meter about the only thing you can do is to make certain all wiring connections are tight, the coils (especially the condenser) are clean and if you want to inspect the control board area, you may find that the compressor start and/or run capacitors are blown out. If you do have a clamp on amp meter what readings do you find. If only 11 - 12 amps and the circuit breaker trips; you have a weak circuit breaker and /or bad wire connections. Good luck and keep us posted.
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