Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...
Air conditioner with refrigerant R134a - Edition 11.2018
⇒ “7.1 Connecting air conditioner service station - vehicles with a
connection on the low-pressure and high-pressure side of the re‐
frigerant circuit”, page 189
⇒ “7.2 Connecting air conditioner service station - vehicles with
no connection on the low-pressure side of the refrigerant circuit”,
page 190
7.1
Connecting air conditioner service sta‐
tion - vehicles with a connection on the
low-pressure and high-pressure side of
the refrigerant circuit
Connecting air conditioner service station for measuring and test‐
ing
– Switch off ignition.
– Connect air conditioner service station to power supply.
– Connect quick-release coupling adapter to filler hoses of air
conditioner service station (handwheels not screwed in/hand
shut-off valve not open).
– Switch on the air conditioner service station and evacuate the
filler hoses (only necessary if there is air in the filler hoses).
– Switch on air conditioner service station.
– Unscrew sealing caps from service connections (with valve).
– Connect air conditioner service station to vehicle refrigerant
circuit via service connections with quick-release coupling
adapters.
– Only screw in the handwheel of the quick-release coupling
adapters to the extent required to reliably open the valves at
the refrigerant circuit connection (observe pressure gauge, do
not open valves further than necessary).
On vehicles with high-voltage system and additional air condi‐
tioner functions (e.g. on the Audi Q7 e-tron):
Note
On vehicles with the “heat pump” and/or “high-voltage battery
cooling” function, high pressure is not available at the service
connection on the high-pressure side in all air conditioner oper‐
ating modes. On these vehicles, the pressure in the refrigerant
circuit on the high-pressure side can only be measured via the
pressure/temperature senders installed in the refrigerant circuit
(depending on the air conditioner operating mode) ⇒ Heating, air
conditioning; Rep. gr. 87 ; Refrigerant circuit (vehicle-specific
Workshop Manual) and ⇒ Vehicle diagnostic tester (“Guided Fault
Finding”).
To check the various functions of these air conditioners:
– On the vehicle diagnostic tester, select the corresponding
function (“passenger compartment cooling”, “heat pump op‐
eration” or “high-voltage battery cooling”) and perform the
function according to requirements ⇒ Vehicle diagnostic tester
in “Guided Fault Finding” mode.
– On the vehicle diagnostic tester, select and read out the meas‐
urements from the various pressure/temperature senders in‐
stalled in the refrigerant circuit ⇒ Vehicle diagnostic tester in
“Guided Fault Finding” mode.
7. Connecting air conditioner service station
189
English 
