Audi TT - Page 47

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
♦ Note the information regarding operating the A/C system after
filling. Refer to ⇒ Refrigerant R134a Servicing; Rep. Gr. 00 ;
Description and Operation (A/C Service Station).
♦ Depending on time period of production and on engine, com‐
pressor construction type may vary. Refer to Electronic Parts
Catalog (ETKA).
♦ The R134a capacity will be different depending on the con‐
denser version. A condenser on a 4 cylinder has a slightly
lower capacity than a 6 cylinder. Refer to⇒ Refrigerant R134a
Servicing; Rep. Gr. 00 ; Specifications .
♦ At start of production, A/C compressors manufactured by
“Denso“ (type “6 SEU 14“) were installed. At a later point in
time A/C compressors from other manufacturers (for example
“Sanden“, type “PXE 16“ or “ZJX“) can be installed. Refer to
the Electronic Parts Catalog (ETKA) and to ⇒ Refrigerant
R134a Servicing; Rep. Gr. 00 ; Specifications .
♦ Depending on the type of A/C compressor, different refrigerant
oil capacities are intended for the refrigerant circuit. Refer to
Electronic Parts Catalog (ETKA) and ⇒ Refrigerant R134a
Servicing; Rep. Gr. 00 ; Specifications .
♦ Compressor as replacement part has different oil fill capaci‐
ties, therefore note the exact part number. Refer to Electronic
Parts Catalog (ETKA) and ⇒ Refrigerant R134a Servicing;
Rep. Gr. 00 ; Specifications . The reason for the different oil
capacities in the compressor is the design of the compressor
itself, note these oil capacities. Too much oil in the circuit leads
to higher pressures and reduces cooling performance of the
system. Too little oil may lead to lubrication problems in the
compressor.
♦ Always fill refrigerant circuit as far as upper tolerance limit
(some refrigerant remains in filler hoses).
♦ The refrigerant circuit may only be filled with approved refrig‐
erant oils. Refer to Electronic Parts Catalog (ETKA)
♦ Different refrigerant oils are required for A/C compressors
made by Denso, Sanden and Zexel/Valeo. Refer to⇒ Refrig‐
erant R134a Servicing; Rep. Gr. 00 ; Specifications and to
Electronic Parts Catalog (ETKA).
♦ Use only the specified oil from a sealed container and always
reseal oil container immediately after use (PAG oil absorbs
moisture). Do not use oil if it is contaminated with moisture or
if oil container has been left open.
♦ Additional information, refer to⇒ Refrigerant R134a Servicing;
Rep. Gr. 00 ; Specifications .
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
1. General Information 43