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Hello, the fan motor or compressor in the outside unit is most likely gone bad..nothing else will trip the breaker, there may be damage to the wall mounted units and printed circuit cards as well. This is nothing that you can correct yourself.
Tell me which direction you are from the center of the nearest town or city and I will see if I can locate a well rated Mitsubishi AC tech for you. We can go from there.
Hello again, good work on locating the bad fuse, however a bad fuse will not cause the breaker to trip, there is cause for both, the fuse burning, and the breaker tripping, the odds are nearly 100% that this will repeat. Stay in touch when it does. I will coach you through it
Meantime its time to locate the 'finish and rate' link. that is the only way the company pays me for my time and expense, In exchange I will hold your question open until you need me again ... all on the same dime so to speak.