Leak Detection Additive With Filled Refrigerant Circuit, Filling

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.

A small quantity of leak detection additive remains in the service connection. Carefully remove this residual amount so a leaking area is not detected erroneously upon a later leak detection.

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

Fig 1: Identifying Cartridge & One Unit

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-- Switch off ignition.

Fig 2: Identifying Hand Pump & Cartridge

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-- Remove sealing cap from service connection of low pressure side in refrigerant circuit.

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

NOTE:

Make sure the hand pump hose is completely filled with leak detection additive.

-- Place the quick-release coupling on the low pressure side service connection and tighten the hand wheel to open the service coupling. Hold the hose upward and tighten the handle of the hand pump just enough until the leak detection additive starts to emerge from the tube.

-- Cover area around service connection on vehicle with foil or absorbent paper.

Fig 3: Adding Leak Detection Additive To Refrigerant Circuit

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-- Tighten the toggle on the hand pump to add 2.5 +/- 0.5 ml (milliliter = cm³ ) of leak detection additive to the refrigerant circuit.

-- Close the service coupling and remove it from the service connection.

Fig 4: Identifying Leak Detection Additive Label

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-- Remove the rest of the leak detection additive from the service connection, for example with absorbent paper.

-- Seal service connection with sealing cap.

-- If necessary, clean area around service connection using cleaning agents.

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

-- 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 .