Hello I tell you my situation, I am starting to install air conditioning equipment after having completed a cooling course. Today I went to a friend's home where they told me that they wanted me to charge it with refrigerant gas (R410A) and it was the second time they had loaded it. I told them that this was not normal, that it was convenient to detect the leak and fix it. In the suction bearing I found the loose nut, I assumed that would be the place of the leak, anyway check the rest. I made the load, check the critical points before the possibility of leakage and do not detect anything, the equipment was working with the correct pressure for the temperature of that moment, it cooled well. after 15 min. I noticed that it did not cool the same, I looked again and the pressure came to low completely. This disoriented me What guidance or advice could you give me?

Apart from what the colleague mentions, the r410a always performs full charge, never partial and in liquid phase, if you did so then there is leakage, because of the speed in which you lost the refrigerant can be several critical points A desoldado pipe The distributor in the evaporator The nut you tightened if you just tightened it, you may have swept the tab. If before the pressure was not so low, I lean towards the latter regards