Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...
Air conditioner with refrigerant R134a - Edition 11.2018
Vehicles with start/stop system
Risk of injury - engine may start unexpectedly
The engine can start unexpectedly if the vehicle's start/stop sys‐
tem is activated. A message in the instrument cluster indicates
whether the start/stop system is activated.
– To deactivate the start/stop system, switch off the ignition.
All vehicles
⇒ “3.1 Components of refrigerant circuit”, page 29
⇒ “3.2 Layout of components of refrigerant circuit and their influ‐
ence on high-pressure and low-pressure sides”, page 30
⇒ “3.3 Design of refrigerant circuit”, page 48
⇒ “3.5 Connections for quick-release coupling in refrigerant cir‐
cuit”, page 51
⇒ “3.6 Switches and senders in refrigerant circuit and related
connections ”, page 57
⇒ “3.7 Electrical components not installed in refrigerant circuit”,
page 65
⇒ “3.8 Pressures and temperatures in refrigerant circuit”,
page 65
⇒ “3.9 Tests and measurements performed with pressure gauge”,
page 70
⇒ “3.10 Air conditioner service and recycling units”, page 71
⇒ “3.11 Repair notes for refrigerant circuit”, page 72
3.1
Components of refrigerant circuit
Caution
Tools or materials (e.g. sealing additives) that have not been
approved can damage or impair the system.
Use only tools and materials that have been approved by the
manufacturer.
Warranty claims are not accepted if tools or materials that have
not been approved are used.
•
•
All components of the refrigerant circuit submitted for quality
analysis should always be sealed (use original sealing caps of
replacement part).
Renew damaged or leaking components of refrigerant circuit
⇒ page 272 .
Note
The following replacement parts were previously filled with nitro‐
gen gas: air conditioner compressor, reservoir, evaporator and
condenser. This charge is being gradually discontinued. There‐
fore, little or no pressure equalisation can be perceived when the
sealing plugs of the replacement part are unscrewed.
3. General information on refrigerant circuit
29
English 
