trouble with a/c

[machunt]

i have a 2011 5th wheel purchased new. been camping for 13 days and now all of a sudden iam blowing the 50 amp breaker on the pole. nothing else on in the unit but a circulating fan in the unit.
Why wouldnt the breaker inside not trip? also i ahd the unit serviced in March. i cleaned the filter inside the coach also. any ideas?

[newman_fulltime]

try it on the 30 amp plug sounds like a bad plug on the pole