Audi Q5 2008 - Page 102

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Note
♦ Exclusive use was made at the start of production of Sanden
A/C compressors. As of model year 1999, use was also made
of Zexel compressors. Refer to ⇒ Heating, Ventilation and Air
Conditioning; Rep. Gr. 87 ; Description and Operation and
Electronic Parts Catalog (ETKA).
♦ As of calendar year 2006, the Zexel / Valeo identification was
changed to Valeo.
♦ There was a change in production for Audi TT as of 10.03 (from
vehicle identification number (VIN) 8N41015239) from con‐
denser with part number “1J0 820 411 J“ (flat pipe width of
20 mm) to condenser with part number “ 8N0 820 411 A“ (flat
pipe width of 16 mm) ⇒ page 98 . From 06.04 to 08.04, a
certain number of vehicles not specified were equipped again
with condensers having a flat pipe width of 20 mm.
♦ Condensers with a flat pipe width of 16 mm require 120 g less
of refrigerant than condensers with flat pipe width of 20 mm.
Refer to Electronic Parts Catalog.
♦ On the Audi TT, from 10.2003 (from VIN 8N41015239) through
06.04, a condensator with a 16 mm flat pipe width (part number
“ 8N0 820 411 A“) was installed filled with 750 + 50 grams of
refrigerant, and in addition to this, these vehicles have label
with the incorrect filling quantity: 750 grams (or 700 grams in
06.04) instead of 650 grams ⇒ page 98 . Due to overfilling
of the system, the A/C compressor may be switched off under
certain circumstances (e.g. high ambient temperatures) since
the pressure in the refrigerant circuit is too high; in addition,
drivers may complain about the engine performance (for ex‐
ample, rumbling and buzzing sounds, the engine is heavier
loaded as the A/C compressor is working steadily against the
excessive pressure). Solution: drain refrigerant circuit, then
refill correct capacity and replace sticker with one indicating
correct capacity specification, or cross out wrong capacity
specification on sticker and note correct capacity e.g. using a
waterproof marker.
♦ If condenser is replaced, observe flat pipe dimensions. If a
condenser with another flat pipe dimension is installed, the
sticker specifying the capacity for refrigerant R134a is also to
be replaced, or the old capacity specification is to be removed
and the new capacity is to be noted, for example, using a wa‐
terproof marker. Refer to Electronic Parts Catalog.
Determining Dimensions Of Flat Pipes From Condenser
♦ Flat pipes of condenser -A-
♦ Width of flat pipes -B-
Sticker For Capacity Of Refrigerant R134a
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
98 Rep. Gr.00 - General, Technical Data