A/C trips circuit Breaker

[Lew I]

I have a 2008 Salem with a Dometic roof air conditioner that trips the A/C circuit breaker when it's hot outside. My camper is 50 amp in a park with 30 amp service. I have a reducer in line with the main electrical plug. The A/C works for a while then trips the circuit breaker. Only when it is very hot outside from 1-6pm. I wait a few minutes before resetting it and turning the A/C back on. It works for a short period and then I can hear the compressor or motor laboring before it trips again. I already replaced the circuit breaker. Someone mentioned that it could be the capacitor. In reading up on it, it sounds like there are 2 types, a start and run capacitor. Are they the same, both in one housing, or are they different? Could this be whats causing the issue?

 

[John From Detroit]

Mine was doing it when it was hot out. Well I put on a new Start cap and a hard start cap as well

now it trips long about midnight at 60 something out.  Will be doing more investigation soon.

 

[Rene T]

Don't know if this has anything to do with your issue but have you checked the CG voltage at the pedestal?

How many Air Conditioners are you running?

 

[ChasA]

I think Rene got it. Low voltage coming from the pedestal, caused by everyone using the A/C.

 

[docj]

I think Rene got it. Low voltage coming from the pedestal, caused by everyone using the A/C.

That's why I use a Hughes Autoformer at the one park we frequent where this issue occurs.  On the RV side of the autoformer the voltage stays at ~115 so the A/C doesn't bog down.