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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).
♦
Rotating will prevent damage to the A/C compressor when
starting the engine for the first from refrigerant oil that may be
located in the compression chamber.
♦
Only start engine after refrigerant circuit has been assembled.
♦
If possible start engine only with a filled refrigerant circuit.
♦
Different A/C compressors, depending on production time pe‐
riod and on engine. Refer to
⇒ “2.3 Refrigerant Circuit Components Overview“, page 49
and Electronic Parts Catalog (ETKA).
♦
The A/C compressor is always driven by pulley (there is no
magnetic clutch). To prevent damage when the compressor is
idling, it is lubricated by an internal oil circuit.
♦
The compressor has an internal oil circuit to ensure the A/C
compressor is not damaged when refrigerant circuit is empty.
Prerequisite for the internal lubrication is residual refrigerant
oil in A/C compressor.
♦
The engine may only be started when the refrigerant circuit is
installed correctly. For example; if the refrigerant lines are not
connected to A/C compressor, when the engine is running the
A/C compressor may heat up (via internal heat generation) so
much that the A/C compressor will be damaged.
♦
A/C Compressor Regulator Valve -N280- is not activated
when the refrigerant circuit is empty and the A/C compressor
idles with the engine. As there is no refrigerant in the circuit
the oil required to lubricate is not fed to the A/C compressor.
5.18.3
Condenser
Note
♦
The radiator and condenser may have small indentations on
the fins even when installed correctly. It is not damage. Do not
replace the radiator or condenser because of those small in‐
dentations.
♦
Condenser is available in different versions, depending on
version of vehicle. Refer to Electronic Parts Catalog (ETKA).
♦
Note
The following describes removal and installation on a 2.0L TFSI
vehicle. The procedure may be different on other 4 cylinder ve‐
hicles.
Removing
– Switch off ignition.
– Discharge refrigerant circuit. Refer to ⇒ Refrigerant R134a
Servicing; Rep. Gr. 00 ; Description and Operation (A/C Serv‐
ice Station).
Audi TT 2007 ➤
Heating, Ventilation and Air Conditioning - Edition 01.2011
5. Removal and Installation
159