Check the compressor motor isn't stuck, any motor that has not run for a while might have seized up. Manually turn it and you never know it might then work under its own power.... assuming it has got power!
Found the problem called my faithful RV mechanic. A/C units draw more power as they get older. The 110 is no longer sufficient to run the unit. Keeps blowing the same fuse. Suggest running off generator, getting a new unit or putting dedicated 30 volt plug at home. If I'm going to do that I might just get that Jacuzzi we have been talking about at the same time.