Returned to home to correctly charge mini split with refrigerant. We removed the existing refrigerant and then proceeded to pull a vacuum on the entire system. We pulled the vacuum down below the standard 500 microns to ensure no leaks were present in the system. We reached 330 microns before we weighed in the exact refrigerant charge of 3lbs 9oz. Once the unit had refrigerant we proceeded to run the system in cooling. I measured 41° air directly at the blower wheel. Our client is aware it may take a good amount of time to reach the desired set point. The 7nit is cooling properly on departure.