Completed annual maintenance on three mini split it indoor units and one condenser, brushed and cleaned all air filters and explained to customer how to clean them, cleaned indoor coils, inspected function and cleanliness of blower wheels which were good, delta t readings averaged 19 degrees, customer stated unit in living room occasionally makes a tiking noise, cycled system a. Few times and let run didn’t hear any noises customer will call us if noise gets worse or happens more frequently, at condenser checked standing pressures which were normal, cleaned outdoor coil and around unit, cleared condensate lines. System operational and working.