Mine have done that as well. both of them at one time or another.
EVERY TIME. (Save one and that is a special case) the problem was a dirty condenser.
Two sets of instructions
Coleman: Remove outer shroud (4 bolts in the top) set aside and brush it off.. See option below but I just brushed and pealed the "Cotton" off the thing.
Replace shroud job done.
Most other makes TURN OFF Remove the outer shroud (many screws around the lower edge) remove inner cover (How depends on make) If your hands are as big as mine remove Fan. now you can clean the condenser by whatever method. Then re-assemble and turn it back on.
Options: They make some "Coil Cleaner" products you can use for an even better (in theory if the product claims are to be believed) clean.
Also both a water wash or a Compressed air wash (After initial brush off) may help.
Clean everything else while you have the cover off.
Since my last cleaning (Last Week) I have had the breaker trip once. I think that was Sunday.. As I was putting the groceries in the RV the power went off for a couple seconds and when it came back on the breaker tripped. This is understandable as you should keep it off 3 minutes.. Worked fine once I reset.
