Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...
Air conditioner with refrigerant R134a - Edition 11.2018
and ⇒ Electrical system; Rep. gr. 93 ; General warning in‐
structions for work on the high-voltage system .
– For test and measurement work that requires the vehicle's
drive system to be active (READY) or the ignition to be switch‐
ed on, move the selector lever to position “P”, activate the
parking brake and take care to keep well clear of the engine
when it is running. Set up any tools needed so that they cannot
come into contact with moving parts.
2.16.5
O-rings
♦ Use only seals which are resistant to refrigerant R134a and
the corresponding refrigerant oils. Colour coding of O-ring
seals is no longer employed. Black and coloured O-rings are
used.
♦ Note the correct inside diameter of the seals used ⇒ Electronic
parts catalogue , ⇒ Heating, air conditioning; Rep. gr. 87 ;
Refrigerant circuit (vehicle-specific Workshop Manual).
♦ Seals may only be used once.
♦ Before fitting, lightly lubricate seals with refrigerant oil (PAG
oil).
2.17
Before using air conditioner after system
has been re-charged
Mechanically driven air conditioner compressor
After air conditioner compressor is attached to engine (before belt
is fitted or drive shaft is installed)
⇒ “5.3.6 Starting up air conditioner after charging”, page 92 and
⇒ Heating, air conditioning; Rep. gr. 87 ; Air conditioner com‐
pressor .
– Rotate air conditioner compressor about 10 revolutions by
hand using the magnetic clutch pulley or belt pulley.
After re-charging
⇒ “5.3.6 Starting up air conditioner after charging”, page 92
– Start engine with air conditioner switched off ( air conditioning
system magnetic clutch - N25- and air conditioner compressor
regulating valve - N280- are not activated).
– When engine idling speed has stabilised, switch on air condi‐
tioner compressor and run it for at least 10 minutes at idling
speed with maximum cooling output.
Electrically driven air conditioner compressor
– After charging the refrigerant circuit, start the electrically driv‐
en air conditioner compressor first using the “Compressor run-
in” function of the basic setting
⇒ “5.3.6 Starting up air conditioner after charging”,
page 92 and ⇒ Vehicle diagnostic tester, “Guided Fault
Finding” function for air conditioner and battery regulation
2. General information on air conditioning systems
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