Returned to perform repairs. System was basically flat on refrigerant on arrival. Recovered remaining refrigerant from system as it was too little to be pumped down. Unwelded existing line drier, rewelded new line drier in to system. Pressurized unit with nitrogen to ensure no leak, as well as bubble tested welds. Removed nitrogen and put system on a vacuum. Vacuumed down to 560 microns. Recharged system with 10 pounds of R410A refrigerant. Refrigerant pressures are back in range and system is operating as it should. System is fully operational upon departure. Homeowner approved to charge card on file for remaining balance over the phone.