Add the UV leak detection additive to the refrigerant circuit using the

WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.

-- Add the UV-leak detection additive and the specified refrigerant quantity into the refrigerant circuit using the A/C Service Station. Refer to REFRIGERANT CIRCUIT, CHARGING and Technical Data (vehicle-specific service information).

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 relative refrigerant oil quantity in the refrigerant circuit can be found in the vehicle-specific service information. Refer to Technical Data (vehicle-specific service information).

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-
UV-Absorbing Protective Eyewear -- -5-
Sticker -- -6-
Safety Gloves -8-

NOTE:

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

Special tools and workshop equipment required

Leak Detection System. Refer to the Parts Information.
A/C Service Station with the ability to add UV leak detection additive in the refrigerant circuit. Refer to the Parts Information.
Approved leak detection additive. Refer to the Parts Information.

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

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

-- Disconnect 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 -VAS 6201/3-.

-- 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 .