By AC-1 Do you mean Air Conditioner 1?
THere is a common issue with A/Cs that many folks do not know.. I figured it out but then I've had a bit of ..er.. training... OF sorts. (I did not know it the first time but that was a Window unit not an RV)
THey need to be cleaned.
If the condenser is clogged then as the thing tries to cool you off the pressure in the system (As well as the Temperature) Goes up and up. The compressor works harder and harder and pulls more and more power cause it is that type of motor. And finally CLICK of Silence ensues (The breaker trips) Has happened to me 3 times.
I go Topside (As the song is titled "Up on the roof) with the needed tools and
Coleman (or Advent air with coleman condenser fan)
Remove the cover (Coleman 4 bolts, Advent 10 screws) And clean the condenser....REplace cover and all is good with the world
Advent Air with OEM fan, Carrier, Dometic and most all other save COLEMAN.
Remove outer cover Remove condenser cover (Method varies Carrier used screws, Advent tape and bent metal tabs) And if your hands are as big as mine remove concenser fan.. Then clean and re-assemble.
I like my Modified Advent better and the Coleman best.