Operating an A/C system with an A/C compressor mechanically
driven
– Start engine with compressor switched off (version with A/C
clutch).
– Set compressor to minimum output, for example, "Econ" or A/
C off mode (version with no A/C clutch with regulating valve).
– Wait until idle speed has stabilized.
– Switch on compressor and operate system for at least 2 mi‐
nutes at idling speed.
– If necessary, check pressures in refrigerant circuit using A/C
service station.
– Turn engine off.
– Screw out handwheel on quick-release coupling adapter.
– Disconnect charging hoses from refrigerant circuit.
– Install the caps.
Operating an A/C system with an A/C compressor with an elec‐
trical drive
– Operate the A/C using “basic setting, compressor cut-in“ in
Guide Fault Finding using Vehicle Diagnosis, Testing & Infor‐
mation System -VAS5051B- A/C System and Battery Regu‐
lation.
– After the basic setting and If necessary, check pressures in
refrigerant circuit using A/C service station.
– Screw out handwheel on quick-release coupling adapter.
– Disconnect charging hoses from refrigerant circuit.
– Install the caps.
2.4.2 Using Service Station
Caution
♦ If it is suspected that chemicals were added to the refrig‐
erant circuit to seal leaks, chemical substances to seal
leaks in the refrigerant circuit (leak stop additive), do not
connect the A/C service station and do not extract the re‐
frigerant.
♦ Chemicals that seal leaks in the coolant circuit form de‐
posits that affect the function of the A/C system and lead
to failure of the A/C system and the A/C service station.
♦ Inform that customer that there are substances in the A/C
system that are no approved by Audi.
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
80 Rep. Gr.00 - General, Technical Data
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