My old TT AC With just plastic cover/vents would rain from condensation . It was old R22 cold as check air came out of it.
Its not an excuse to never remove cover and clean coils ,leaves insects and mud from the AC. Just give it all look over.
If there is a drain hose to the ground. The AC coil drain hoses at work I put a shop vac to outlets when they are running hard . It sucks slime and gunk out . We pay for HV/AC preventive maintaince . Every company starts a downhill slide after a couple years.
95 Monaco Crown Royale
M11 400hp, 4060 trans.
Aquahot, Generac Guardian7.5k