Add the UV-leak detection additive using the A/C service station to the refrigerant circuit.

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-- Add the UV-leak detection additive and the prescribed refrigerant amount using the A/C Service Station to the refrigerant circuit. Refer to REFRIGERANT R134A CAPACITIES .

NOTE:

Add 2.5 ± 0.5 cm³ of UV-leak detection additive for a refrigerant circuit with a refrigerant capacity of 100 to 150 cm ³ with the Leak Detection Kit - VAS6201- for the Leak Detection Kit VAS6201. 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 adding the UV-leak detection additive using the A/C service station, consult the corresponding Owner's Manual as the required amount may vary. For the relevant refrigerant oil quantities in the refrigerant circuit. Refer to APPROVED REFRIGERANT OILS AND CAPACITIES .

Special tools and workshop equipment required

A/C service station with the option for adding the UV-leak detection additive to the refrigerant circuit. (Refer to Tools; Special Tools and Equipment: A/C and Heating).
Approved leak detection additive. (Refer to Tools; Special Tools and Equipment: A/C and Heating).
Leak Detection Kit - Cleaning Solution - VAS6201/3- -3-

Fig 1: Identifying Leak Detection System VAS 6201
Courtesy of AUDI OF AMERICA, LLC
UV Leak Detection Lamp - VAS6201/4A- -4-
Leak Detection Kit - Eye Protection - VAS6201/6- -5-
Leak Detection Kit - Label - VAS6201/7- -6-

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

-- Start the A/C system.

NOTE:

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 UV-leak detection additive flows out to clearly determine 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 UV Lamp VAS6196/4 below.