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Pressure check for leaks

Please I have 3 units of r410a and before I connect the line set to de coil I put 500 psi and after I connect the coil again 500 psi but ones is connected to de coil pressure drop to 250 psi and stays there some one can tell me how to solve these issue please


    EBEBRATT-Ed Member Posts: 15,510
    Repost this in A-C heat Pumps & refrigeration, not in steam

    Also, I don't understand yor problem