Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A1 Sportback 2 ...
Air conditioner with refrigerant R134a - Edition 11.2018
⇒ “1 Warning instructions when working on vehicles with high-
voltage system”, page 1 .
♦ If work is necessary in the vicinity of high-voltage system com‐
ponents, perform a visual inspection of the high-voltage com‐
ponents and wiring to check for damage ⇒ page 2 and note ⇒
Rep. gr. 00 ; Safety precautions or ⇒ Electrical system; Rep.
gr. 93 ; General warning instructions for work on the high-
voltage system .
♦ For further information on the high-voltage system, refer to ⇒
Rep. gr. 00 ; Safety precautions or ⇒ Electrical system; Rep.
gr. 93 ; General warning instructions for work on the high-
voltage system .
♦ If work on high-voltage system components is necessary, de-
energise high-voltage system ⇒ Rep. gr. 00 ; Safety precau‐
tions or ⇒ Electrical system; Rep. gr. 93 ; General warning
instructions for work on the high-voltage system .
•
The engine should only be started after the refrigerant circuit
has been assembled completely.
•
On vehicles with battery cooling, hybrid operation is only pos‐
sible with the air conditioner charged and with no air condi‐
tioner faults stored ⇒ Vehicle diagnostic tester in “Guided
Fault Finding” mode for air conditioner and battery regulation
•
After installing the electrically driven air conditioner compres‐
sor and then charging the refrigerant circuit, first start up the
compressor via the “Compressor run-in” function of the basic
setting routine. Otherwise, the air conditioner compressor may
be damaged if refrigerant oil has accumulated in the compres‐
sion chamber of the air conditioner compressor due to inap‐
propriate storage prior to installation. ⇒ Vehicle diagnostic
tester, “Guided Fault Finding” function for air conditioner and
battery regulation
•
•
An electrically driven air conditioner compressor may only be
activated when the refrigerant circuit is charged. Running the
air conditioner compressor with the refrigerant circuit empty
could lead to compressor damage ⇒ Vehicle diagnostic tester
(“Guided Fault Finding” mode for air conditioner and battery
regulation) .
Before the refrigerant circuit can be discharged, evacuated
and charged, specific electrically operated valves (may vary
depending on the refrigerant circuit layout) must be opened
(e.g. on the Audi Q7 e-tron) ⇒ Heating, air conditioning; Rep.
gr. 87 ; Refrigerant circuit and ⇒ Vehicle diagnostic tester in
“Guided Fault Finding” mode.
•
•
To check whether the air conditioner is functioning properly,
specific electrically operated valves must be opened or closed
(e.g. on the Audi Q7 e-tron) ⇒ Heating, air conditioning; Rep.
gr. 87 ; Refrigerant circuit and ⇒ Vehicle diagnostic tester in
“Guided Fault Finding” mode.
Depending on the vehicle, high pressure may not be available
at the service connection on the high-pressure side in all air
conditioner operating modes (e.g. on the Audi Q7 e-tron). The
senders installed in the refrigerant circuit must therefore be
used to check that the air conditioner in these vehicles is func‐
tioning properly ⇒ Heating, air conditioning; Rep. gr. 87 ;
Refrigerant circuit and ⇒ Vehicle diagnostic tester in “Guided
Fault Finding” mode.
– To minimise the number of automatic engine starts when the
vehicle's drive system is active during test and measurement
work, charge the vehicle batteries e.g. with the battery
charger 60A - VAS 5904- in battery standby mode ⇒ Electrical
system; General information; Rep. gr. 27 ; Charging battery
26
Rep. gr.87 - Air conditioning system
English 
