Add the UV-Leak Detection Additive to the Refrigerant Circuit via an Opened Connection
Courtesy of AUDI OF AMERICA, LLC-- Open an easily accessible connection point on the refrigerant circuit
-- Cover the area around connection point with foil or absorbent paper.
-- Hold the tube upwards.
-- Tighten the hand pump handle just enough until the UV-leak detection additive comes out of the tube.
-- Add 2.5 ± 0.5 ml (Milliliter = cm3 ) of UV-leak detection additive to the refrigerant circuit (for a refrigerant circuit with a refrigerant oil capacity from 100 to 150 cm3 ).
If UV-leak detection additive was already added to the refrigerant circuit for an earlier repair, note the following: Only add new UV-leak detection additive if the refrigerant oil will be replaced. If only a portion of the refrigerant oil was replaced, only add a proportionate amount of the UV-leak detection additive. For example, if 100 ml of refrigerant oil was replaced in a vehicle with 250 ml, add only 2 ml (cm3 ) of UV-leak detection additive.
-- Replace the O-ring seal at the opened connection point.
-- Assemble the refrigerant circuit.
-- Apply a label near the service connection stating that leak detection fluid was added to the refrigerant circuit.
-- Evacuate and recharge the refrigerant circuit according to specification. Refer to REFRIGERANT CIRCUIT, EVACUATING WITH A/C SERVICE STATION and REFRIGERANT CIRCUIT, CHARGING WITH A/C SERVICE STATION .
-- Start the A/C system.
A/C system must be operated for a minimum of 60 minutes so that the additive distributes itself in the entire refrigerant circuit (compressor must be running). Depending on the size of the leak, it may become visible under UV light within that time.
Depending on the size and location of the leak, it can now last up to several days until enough refrigerant oil with additive flows out to determine definitely the leaking area.
-- Find the leak in the refrigerant circuit with the UV Lamp :VAS6196/4 . Refer to Detecting Leaks on the Refrigerant Circuit using .