Carrier central A/C outside fan not working
My 1st floor central A/C not having any cool air, the indoor fan is working but the outdoor fan is not working. I turned on the 1st floor A/C by mistake without removing the outdoor unit's cover I put on over the winter. I realized the problem after 1st floor A/C run about 1~2 hours. Would that do any damage to the outdoor condenser? Or is that the reason why the outdoor fan is not working? I had similar problem with my 2nd floor A/C (in attic) about 2 years ago. There was no cool air made and outdoor fan was not working. I had repairman came in and added 4 lbs freon to the 2nd floor unit and 1 lb. the 1st floor unit. How often is it to add more freon? Would low freon be the reason to my 1st floor A/C outdoor fan not working?
Thank you in advance for your help!