Add the UV-Leak Detection Additive to the Refrigerant Circuit Using the A/C Service Station.

-- Fill the UV-leak detection additive and the specified refrigerant quantity in the refrigerant circuit using the A/C service station. Refer to REFRIGERANT CIRCUIT, CHARGING and Technical Data .

NOTE:

The quantity of UV-leak detection additive which is filled on a refrigerant circuit with a refrigerant oil quantity up to 150 cm³ is 3.0 ⁺ /_- 0.5 ml (cm³ ). If the refrigerant oil capacity in the refrigerant circuit is larger, then more UV leak detection additive must be added accordingly (for example, 5.0 ± 0.5 (cm³ ) for a refrigerant circuit with a refrigerant oil capacity of 250 cm ³ . When filling the UV-leak detection additive using an A/C service station the set quantity in the A/C service station can vary for this reason pay attention to the corresponding Owner's Manual. Refer to A/C service station Owner's Manual.

The actual refrigerant oil quantity in the refrigerant circuit can be found in the vehicle-specific Service Information. Refer to Technical Data .

If UV-leak detection additive was filled already in a 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 50 ml of refrigerant oil was replaced in a vehicle with 150 ml, add only 1.0 ml (cm³ ) of UV-leak detection additive.

The leak detection system has the following components:

Fig 1: Identifying Leak Detection System VAS 6201

Courtesy of AUDI OF AMERICA, LLC

Cleaning Solution -3-
UV Leak Detection Lamp -4-
Protective Eyewear -5-
Sticker -6-
Safety Gloves -8-

NOTE:

Ignore items -1, 2 and 7- in the image.

-- Evacuate the refrigerant circuit according to the procedure and fill with UV-leak detection additive and refrigerant. Refer to REFRIGERANT CIRCUIT, EVACUATING and REFRIGERANT CIRCUIT, CHARGING .

-- Wait until the pressure in the high and low pressure side have equalized.

-- Disconnect and the A/C service station from the refrigerant circuit and turn it off. Refer to A/C SERVICE STATION, SWITCHING OFF AND DISCONNECTING FROM REFRIGERANT CIRCUIT .

-- Apply a label near the service connections stating that UV-leak detection additive was added to the refrigerant circuit.

Fig 2: Identifying Leak Detection Additive Label

Courtesy of AUDI OF AMERICA, LLC

-- Remove the residual UV-leak detection additive for example with absorbent paper from the service connection and the surrounding area and clean using Leak Detection Kit - Cleaning Solution :VAS6201/3 .

-- Seal the service connection using closure caps.

-- Start the A/C system.

-- Operate the A/C system for at least 60 minutes with the A/C compressor switched on.

-- Check for leaks on the refrigerant circuit using UV lamp. Refer to Check for Leaks on the Refrigerant Circuit Using UV Lamp. .