Responded to no cooling call on a split air conditioning system. Performed diagnostics, detected failed compressor. Following EPA protocols, recovered remaining refrigerant charge. Replaced compressor, expansion device, filter drier, and gaskets. Pulled vacuum to 500 microns, charged with R-410A per specifications. Verified proper operating pressures, temperatures, and subcooling. Cleaned indoor and outdoor coils, checked airflow. System now operating within designed parameters after compressor replacement.