[rdlamb]

Hi.
Ron has great ideas for you. Here are a couple more.
Your AC's require a "boost" of amps to start them. If your total starting amps even slightly exceed your allotted breaker amps pop goes that breaker.
First, make sure you have a full 50 amps delivered by shore power to your breaker box. Many parks advertise 50 amps, but have lines and equipment that provide a highly variable amperage to your coach. Breakers trip for many reasons, amperage being the one we focus upon. Drop the voltage to 102-5 volts and your amp demanding AC's will heat and trip your breakers.

Usually, only your AC's are on one breaker. Usually. Turn everything off and try running one AC, then add in the second.
Tripping the breaker in that case would lead me to question the circuit board in the AC.

Do you have electric appliances? Stove, refrigerator, perhaps an electric water heater, or an insta-hot?

There are excellent meters that measure how many watts are being used on each line, so you can get an idea where the trip came from.
Finally, did you install any new hangers, place any nails or screws in any area near the AC? Puncturing the insulation of your electrical line will trip breakers.
Also, do you have a generator? If so, can you run both AC's with generator power?
Rick