Performed a/c membership visit. Found condensing unit to be getting slightly restricted with cotton. Cleaned condenser coils. Turned unit on. Checked refrigerant levels, found system a little low on refrigerant. Added 1 lb R410A refrigerant to system. Checked electrical components, checked amp draw of fan motor and compressor, checked air temp entering and leaving condenser. Everything checked out good. Recommend keeping air filter clean.