Performed precision AC tune up. Checked operating refrigerant pressures. Adjusted refrigerant charge to ensure peak performance and efficiency. Tested power distribution system and corresponding starting components. Verified proper amp draw; optimal. Media filter is due for replacement 20x20x5. Purged primary drain line to ensure no blockage or obstructions. Used alkaline treatment to reduce bacterial growth within lines. Verified temperature differential across indoor coil within desirable range. Washed outdoor coils thoroughly to maintain heat rejection. All checks are good at this time system. System is currently operating within desirable specifications