When a re-gas is carried out, the machine will identify if there is refrigerant present, if present the gas will be recovered and the weight measured.
A vacuum test is carried out at the rate of 1 Bar for twenty minutes, this will identify any major leaks within the system.If the system passes these tests the refrigerant & a UV dye will be added as per the manufactures recommendations.
The vacuum test is not a guarantee that the system is in perfect condition. Due to high operating pressures and the properties of the refrigerant, leaks may occur after the procedure. In some instances, leaks can happen within hours in other cases weeks. The UV dye that was put in the system will help to find the leak.