Hello Carlos, I see the error in having collected the remaining refrigerant in the system, because with the collection by the fusera of the leak, surely introduced and stored inside the condensing unit itself, an x amount of air or non-condensable gases , that by releasing them again within the entire system these gases do not have the property of changing their state from gaseous to liquid and from liquid to gaseous, at the same working pressures of the refrigerant as it passes through the condenser and the evaporator of the equipment , and that is why the great fluctuation is observed that it observes when raising and lowering sharply the internal pressures of the system reflected in the manometer, giving reasons in addition to that the equipment may cool something but it does not manage to lower the real temperature for which it is designed. You must sweep the system with nitrogen, change the filter drier and make a prolonged vacuum with vacuum pump for about 30 or 45 minutes to also properly dehydrate the system. Luck. S @ lu2 friovega63.