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

• Vacuum test successfully completed. Refer to REFRIGERANT CIRCUIT, EVACUATING .

-- Fill the refrigerant circuit with Leak Detection Additive and refrigerant, following the instructions. Refer to REFRIGERANT CIRCUIT, CHARGING  and REFRIGERANT OIL CAPACITIES , Parts Information.

Quantities for UV leak detection additive:

• The quantity of UV leak detection additive is depending on the specified quantity of refrigerant oil required for the refrigerant circuit. Refer to REFRIGERANT OIL CAPACITIES .
• Refrigerant circuits with a specified capacity of refrigerant oil < 150cm³ : 3.0 ±0.5 ml
• Refrigerant circuits with a higher specified quantity of refrigerant oil. Example 250cm³ : 5.0 ±0.5 ml
• 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, then only 1.0 ml (cm3) of UV leak detection additive is allowed to be added.

Tip

• When filling the Leak Detection Additive using a A/C Service Station, the capacity to be set may differ. Refer to Owner's Manual.

-- After filling the Leak Detection Additive, mark the refrigerant circuit using the Sticker:VAS 6201/7  .

Fig 1: Identifying Leak Detection Additive Label

Courtesy of AUDI OF AMERICA, LLC

-- Clean the service connections and their surroundings from remains of the Leak Detection Additive. For this, use absorbent paper and Cleaning Solution -VAS 6201/3-.