Audi Q5 2008 - Specifications; 3.1 Charging Refrigerant; 3.2 Refrigerant R134 a Capacities

Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.
Note
If pressure is to be measured after charging system on vehicles
with a service connection on one side of the refrigerant circuit
only, use valve adapter and charging hose with valve opener.
Refer to
⇒ “2.4.5 Connecting for Measuring and Testing, One Service
Connection“, page 84 .
– Switch on service station and evacuate refrigerant circuit for
at least 30 minutes. The pressure reading must indicate an
absolute pressure of less than 10 mbar (corresponding to 990
mbar vacuum).
Note
At this pressure, both green LEDs light for example on service
station V.A.G 1885 (currently available service stations, refer to
Special Tools and Equipment Catalog).
– Switch off service station and allow to stand for at least 1 hour.
• If the vacuum display (LED chain) does not change, the sys‐
tem is free of leaks and can be charged.
Note
♦ A current vacuum reading (LED) is only obtained using V.A.G
1885, for example (currently available service stations refer to
Special Tools and Equipment Catalog) after pressing the
"Evacuate" button again.
♦ If with this service station the upper (green) LEDs do not light
immediately after switching on, either the refrigerant circuit is
leaking or there is still residual moisture/refrigerant in the cir‐
cuit.
If the vacuum is not maintained or cannot generate a sufficient
vacuum, perform the following:
♦ Did the pressure in refrigerant circuit increase slowly after
evacuating, for example, through evaporation.
– If it is possible that the refrigerant circuit may have leaks,
evacuate and check the vacuum display again over several
hours Only when the vacuum is maintained can the refrigerant
circuit be charged.
– If the refrigerant circuit is sealed, it can be filled.
♦ If there is a leak that allowed enough air to enter during evac‐
uation that the A/C service station cannot generate a sufficient
vacuum or that the vacuum is lost immediately after switching
the A/C service station off:
– Determine the location of the leak in the refrigerant circuit as
follows:
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
90 Rep. Gr.00 - General, Technical Data