Originally Posted by Kevin and Beth
Yep...our bedroom ac unit does occasionally trip, but I'm sure it's power issues in our campground. I've checked the incoming power and it fluctuates when the campground is full.
This is fairly common. The closer you are to the transformers, the better the voltage will be. But it may end up being too much for the transformers they have in the system. If that is the case, the voltage in all the sites supplied by that transformer will likely be low. I had this happen in 110 degree heat at the Colorado River about 15 years ago, and it wasn't pretty. The only solution is to avoid camping there when it's crowded, or try a different part of the campground. If you have a meter, you can test voltage at different areas of the campground to see if it's better in some parts. Essentially, the lower your voltage drops, the greater the current the motors will draw, and the hotter your motors will run. At some point, it trips the breaker. But what you don't always see is the damage it's doing long-term to your motors.
As previously mentioned, the easy things are the ones to check first. Voltage, wiring connections. If that's not it, try a new breaker. They aren't expensive. If that doesn't solve it, you may have something wrong with the motor or compressor. They sometimes do die a slow death.