Ac tune up x3. Cleared all drain lines. Replaced all filters with customer supplied filters. Tested all blower motors and capacitors. Took delta t readings, all units are between 16-18 degree split. Pressures for all 3 units are good, superheat is in the low 20’s for all 3. Capacitors all tested normal and no signs of pitted or burnt capacitors. All 3 systems take r22, customer purchased cans of Freon if systems ever needed to be charged. All systems running.