The fuse box should be in the roadside rear overhead cabinet. Not at all unusual to pop a breaker in hot weather, especially if AC voltage is a bit low and either the microwave or the electric rod in the water heater happens to be on when the A/C starts up.
You might need to reset the Comfort Control. Hold down the top and bottom buttons while you turn the CC on. Keep holding the buttons down for a few seconds and then release them. This action resynchronizes the A/C and the CC.
There is a substantial delay between selecting A/C on the CC and the A/C actually starting up. This delay is to protect the compressor, but it can really get frustrating when you first hook up and want to get the trailer cooled down in a hurry.
John W. Irwin
2005 Classic 28 "Sabre-Dog III"
2013 Silverado 2500HD Duramax/Allison LTZ
WBCCI #9632, TAC TX-10