Hi everyone, hard to learn something new by itself, unfortunately that is my case. I was checking an carrier RTU and i could not figure out why was keep on freezing on me. Finally I evacuate all the refrigerant and came up that the amount of refrigerant was exactly the exactly the same as the label in the unit said, 7.9 lb. So I got to the point to assume that it was getting freeze up because the inside of the building was not to hot???? because, nothing else was wrong. All tips will be greatly appreciated.