Performed comprehensive AC maintenance on a Trane XR17 system in Piscataway, NJ. Cleaned condenser coils with Nu-Calgon Evap Pow'r-C, improving heat transfer efficiency. Replaced clogged air filter with a MERV 11 Honeywell FC100A1037 pleated filter. Checked refrigerant charge using Fieldpiece SMAN460 digital manifold, adding R-410A to manufacturer specifications. Tightened electrical connections and applied NoAlOx anti-oxidation compound to prevent corrosion. Lubricated fan motor bearings with SAE 20 non-detergent oil. Cleaned condensate drain line using CO2 cartridges. System now operating at peak performance, ensuring optimal cooling and energy efficiency.