system was doing the same thing. The problem with mine was that the blower fan was pretty much siezed up, which required a lot of extra amps trying to turn it. I could plug
it in and turn it on, and it would run for 15 minutes or so, but when the compressor cycled off and tried to kick back on, it would throw the breaker.
I sprayed down inside the fan motor
with contact cleaner and then WD-40, spun it by hand about 1000 times each way, then tried it again. That was apparently enough to free it up and lower the amp draw to an acceptable level.