Audi TT - Page 180

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with respect to the correctness of information in this document. Copyright by AUDI AG.
Note
♦ There are different versions of the fluid reservoir and con‐
denser, ensure correct allocation. Refer to Electronic Parts
Catalog (ETKA).
♦ The reservoir may be attached to or integrated in the con‐
denser, depending on the version of the condenser. If the
condenser has an integrated reservoir, replace the dryer car‐
tridge. Refer to ⇒ “1.11 Dryer Cartridge“, page 33 .
♦ A different version condenser will be installed on 5 cylinder
engines, as opposed to vehicles with a 4 or 6 cylinder engine.
This condenser -A- has an integrated reservoir -B-. This res‐
ervoir -B- has a dryer cartridge installed in it, which currently
is not available as a replacement part. Therefore, it may be
necessary to replace the complete condenser if there is a
complaint about this vehicle. Refer to
⇒ “1.11 Dryer Cartridge“, page 33 , Electronic Parts Catalog
and to⇒ Refrigerant R134a Servicing; Rep. Gr. 00 ; Removal
and Installation .
♦ Dryer cartridge (on a condenser with an integrated fluid res‐
ervoir), removing and installing, refer to
⇒ “1.11 Dryer Cartridge“, page 33 .
♦ The removed reservoir contains refrigerant oil that must be
returned to the refrigerant circuit (with the new reservoir). Re‐
fer to ⇒ Refrigerant R134a Servicing; Rep. Gr. 00 ; Removal
and Installation . Adjustment of oil quantity depends on nature
of complaint.
– If for example the fluid reservoir was damaged due to a vehicle
accident (no refrigerant leaked out, no moisture and no dirt
penetrated into refrigerant circuit), let refrigerant oil flow out of
the removed fluid reservoir and add the drained quantity of
refrigerant oil plus 10 cm
3
of fresh refrigerant oil to the refrig‐
erant circuit (for example, condenser), this services the refrig‐
erant circuit without extensive repair work. Refer to ⇒
Refrigerant R134a Servicing; Rep. Gr. 00 ; Removal and In‐
stallation .
– If a certain amount of refrigerant oil has leaked due to an ac‐
cident or contaminants or moisture has entered the refrigerant
circuit, circuit must be flushed. Refer to ⇒ Refrigerant R134a
Servicing; Rep. Gr. 00 ; General Information (Refrigerant Cir‐
cuit and Components).
Removing
– Switch off ignition.
– Discharge refrigerant circuit. Refer to ⇒ Refrigerant R134a
Servicing; Rep. Gr. 00 ; Description and Operation (A/C Serv‐
ice Station).
– Remove the front bumper cover. Refer to ⇒ Body Exterior;
Rep. Gr. 63 ; Removal and Installation .
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
176 Rep. Gr.87 - Air Conditioning