Customer having problems with mini split system. Arrived to find system out of refrigerant. Replaced all flare fittings with pro-fit fittings. Pressured up to 600 psi and bubble checked. Found no leaks. Vacuumed down. Pressured up again to 600 psi and performed a leak search. Device found no leaks. Vacuumed down again to 290 microns. There is another leak I could not find. Chris has talked to the customer.