Complete 2 system a/c repair and preventative maintenance check. Check and find upstairs system not cooling properly. Find system miss match and not size properly. Find outdoor unit 3 Ton and indoor coil only 2.5Ton. System not charge properly and can have liquid back pressure and damage compressor or over heat compressor. Need to replace upstairs evaporator coil with 3 Ton coil for proper match up per manufacturer spec. Downstairs also have to same problem. 5 Ton system and only have 4 Ton capacity coil. System not match properly. Need to replace both coil for proper cooling and match up.