Good afternoon . I am new here, I studied a year installation and repair of air conditioning But I have some doubts please ask them to help me. It turns out that I changed my compressor to my air conditioner, I emptied it, I loaded it, the high spout (the fine one) froze, and after a few minutes it completely shut down in the outdoor and indoor unit and when I loaded it it reached me only 20 psi down already thank you very much

Hello how are you? It is obvious that the discharge pipe will freeze because you only have 20psi and the equipment has not yet done the full expansion. You have two options to load it the first is that you remove the spout sensor from its place and put it on the outside so that it does not cease the temperature and let you load the equipment quietly and once loaded you place it again in its original place. the second option is that if the sensor persists when removing the fault, it measures both sensors, room sensor and spout sensor and verifies that both have the same ohmiaje, although I prefer the first option because personally it has happened to me greetings and comments how are you doing

Why did you change it? You might have an obstruction from what I see? Did you check capillary?