What year is your coach? Check for a wire schematic of the control circuit if there is a relay that controls the fan. As already mentioned, if the fan will run without any help, the fan is not the problem. Normally the condenser fan will not trip the breaker, they have internal thermal protection, unless there is a dead short. How long does the AC run before the breaker trips? If it runs for several minutes the breaker is tripping because the compressor discharge pressure is getting to high causing the compressor to draw high amps. Some AC units have a high pressure cutout your's may not.
Chuck & Teri, 1999 35 ft. Dolphin 5350, F53 Chassis with tag axle, Chassis build date 1/99 in Mexico, Banks System, Trans Command, Air Lift Air Bags on rear, Koni Shocks, Blue OX TruCenter, TigerTrak track bars front and rear, Roadmaster 1-3/4" rear auxiliary sway bar, 2013 VW Passat TDI SEL Premium, 1994 36 ft. Avion 5th Wheel. FMCA #F430129