Filling Leak Detection Additive When The Refrigerant Circuit Is Empty

Fig 1: Identifying Cartridge & One Unit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

The cartridge -A- contains 15.4 ml leak detection additive (one unit -B- corresponds to 2.5 ml).

-- Assemble hand pump -VAS 6201- item -1- with cartridge item -2- -VAS 6201/2-.

Fig 2: Identifying Hand Pump & Cartridge

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Insert the filler tube VAS 6201/8 (COMMERCIALLY AVAILABLE TOOLS AND MATERIALS => VAS 6201/8 item -7-) in the hand pump.

-- Open hand pump service valve.

Leak detection additive is best added to empty refrigerant circuit via opened connection.

Fig 3: Identifying Adding Leak Detection Additive To Refrigerant Circuit

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

-- Open an easily accessible connection point on refrigerant circuit

-- Cover area around connection point with foil or absorbent paper.

-- Hold tube upwards.

-- Tighten the toggle on the hand pump until the leak detection additive comes out of the tube.

-- Add 2.5 +/- 0.5 ml (milliliter = cm³ ) of leak detection additive to the refrigerant circuit.

NOTE:

If leak detection fluid was filled already in a refrigerant circuit for an earlier repair, note the following: only add new 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 leak detection additive. For example, if 100 ml of refrigerant oil was replaced in a vehicle with 250 ml, add only 1 ml (cm³ ) of leak detection additive.

-- Replace the O-rings on opened connection point.

-- Assemble refrigerant circuit.

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

-- Evacuate and recharge refrigerant circuit according to specification. Refer to REFRIGERANT CIRCUIT, DISCHARGING WITH SERVICE STATION and REFRIGERANT CIRCUIT, CHARGING WITH SERVICE STATION .

-- Start the A/C system.

NOTE:

The A/C system must run for at least 60 minutes so the additive distributes itself through the entire refrigerant circuit. The compressor must be running. Depending on the size of the leak, it may become visible within that time.

-- Find the leak in the refrigerant circuit with the UV lamp VAS 6196/4. Refer to DETECTING LEAKS IN THE REFRIGERANT CIRCUIT USING THE UV LAMP VAS 6196/4 .