Performed AC maintenance on a ductless mini-split system. Checked refrigerant levels with a manifold gauge and added R-410A as needed. Cleaned the indoor air handler filters and coils using a foaming coil cleaner to ensure efficient operation. Inspected and tightened electrical connections. Verified the condensate drain was clear and functional. Tested the outdoor unit for proper compressor operation. Ensured the system operated efficiently and provided optimal cooling throughout the serviced area.