Upon arrival customer had showed me the upstairs media room where there was low air flow to the vents. Traced down duct work and found that the upstairs media room had been tied into the downstairs system. Therefore room would only cool when downstairs calls. Removed tap from downstairs, sealed hole and moved it over to the upstairs system. Found majority of the damper closed to upstairs, found start collars not sealed or screwed in. Sealed collars up and turned system on in maximum test mode and checked pressures. Pressures looked good system is cooling, homeowner also had a mini split for the upstairs and just quickly hooked gauge up to it and found it was low on Freon and locked out on low pressure system is an R-22. R-22 is no longer made, Recommend replacing mini split if wanting more air conditioning for room.