Eureka!! I found it!!
After a hot, sleepless night, I began to check for a solution–within my limited ability. (I’m not going to climb up on the roof of the 5th-wheel trailer.) Changed the batteries on the remote AGAIN. Checked the breaker box and found the A/C needed to be clicked on AGAIN. Just so the reader gets the full “picture” (lol), I laid on the floor for the picture of air-conditioner grill, etc., mounted in the ceiling. For the record, the indoor and outdoor temperatures. ~~ Eventually, my air-conditioner will need a professional analysis. Hopefully that can wait until A/C professionals aren’t booked with service calls?!?! ~~ 
It is 81 degrees inside my trailer home as I type this (9:40 AM) but air is moving and I’m reasonably comfortable. (Kudos to SSSSS?!) When all else fails, I have a reliable three-speed fan.
Furthermore: Plants have been watered and bird feeders filled. Especially important: Fresh water in the fountain for the birds. It is a delight to see them splashing in the top.
So something is making the breaker kick off? Do you have an electric water heater? If you do, you could try turning it off an seeing if that made a difference. Check your connection at the power pole; where your cord from the RV is plugged into power, and make sure it hasn’t come loose, or even dirty or corroded.