Performed precision AC tune up. Checked operating refrigerant pressures. Verified temp differential across coil within desirable range. Tested power distribution and corresponding starting components. Checked amp draw; optimal. Used alkaline treatment to reduce bacterial growth within drains / placed algae tablets. Inspected media filter which was found to be cleanly recently repalced. Washed outdoor coils thoroughly to maintain heat rejections. Coils will need to be chemically cleaned in near future to fully restore them to factory conditions. Otherwise all checks are good at this time. System currently operating within desirable specifications