Ruud Problems

Question

Hey Need help, I replaced the capacitor last night and it worked air was fine all night, but this morning it triped again. so I replaced the breaker switch and it started up again and the fan was running outside with air comming out of the vents inside. but breaker popped after about 30 seconds and cant get it back on!!! Only a buzzing noise comming from the system outside even with power off!!!! Any clue???