Diagnosed Mitsubishi mini-split system with error code P6 (inverter overload protection). Found excessive debris on outdoor coil causing high head pressure. Measured discharge temperature at 195°F (exceeding 180°F maximum). Cleaned outdoor coil, verified proper airflow, and checked refrigerant charge (subcooling at 11°F). Also discovered partially blocked condensate drain causing water damage to ceiling. Cleared drain line, installed clean-out port, and verified proper drainage. Checked all electrical connections and measured compressor amp draw at 8.6A (within specification). Advised homeowner on quarterly coil cleaning and proper filter maintenance during pollen season.