Add The Leak Detector Additive To The Refrigerant Circuit At An
Opened Connection
.
– Open an easily accessible connection point on refrigerant cir‐
cuit
– Cover area around connection point with foil or absorbent pa‐
per.
– Hold tube upwards.
– Tighten the toggle on the hand pump until the leak detection
additive comes out of the tube.
–
Fill 2.5
+
/
-
0.5 ml (milliliter = cm
3
) leak detection additive into
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
refrigerant oil was replaced, only top-off with a corresponding
amount of leak detection fluid as well. For example, if 100 ml of
refrigerant oil was replaced in a vehicle with 250 ml, add only 1
ml (cm
3
) of leak detection additive.
– Replace O-ring seal at open connection.
– Assemble refrigerant circuit
– Affix a sticker in the area of the service connection with the
note that leak detection fluid was added to this refrigerant cir‐
cuit.
– Evacuate and recharge refrigerant circuit according to speci‐
fication. Refer to
⇒ “2.4.11 Evacuating Refrigerant Circuit“, page 89 and
⇒ “2.4.3 Charging Refrigerant Circuit“, page 83 .
– 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 additive
flows out to determine definitely the leaking area.
– Find the leak in the refrigerant circuit with the UV lamp VAS
6196/4. Refer to ⇒ page 150 .
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
4. Diagnosis and Testing 147
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