Audi Q7: A/C System Repair Information
- Air conditioning systems designed for refrigerant R12 are
only to be filled with refrigerant R134a if certain requirements
are fulfilled. Refer to
→ Chapter "Refrigerant Circuit, Converting R12 to R134a and
Servicing" and Repair manual: Air Conditioner with
R12 Parts 2 and 3. This repair manual is only available in hard
copy.
- The refrigerant oils specifically developed for R134a and
R12 refrigerant circuits are never to be mixed.
- Service stations which come in contact with the refrigerant
are only to be used for the intended refrigerant.
- Components of R134a refrigerant circuits can be identified
by their markings, green labels or design (such as different
threads) to prevent interchanging with components designed for
refrigerant R12.
- A label indicating the refrigerant used is provided in the
engine compartment on the lock carrier or in the plenum chamber.
- Different refrigerants are never to be mixed.
Note
When working on the refrigerant circuit, always heed the
information given in the sections on "Safety measures". Refer to
→ Chapter "A/C System and Refrigerant R134a Safety Precautions"
and "Basic rules for working on refrigerant circuit"
→ Chapter "Refrigerant Circuit, General Precautions".
Refrigerant Circuit, Converting R12 to R134a
CFC refrigerants are no longer used in the automotive
industry.
Converting refrigerant circuits from R12 refrigerant to
R134a refrigerant and servicing converted circuits
Refer to Repair Manual: Air Conditioner with Refrigerant R12
Parts 2 and 3 (This repair manual is only available in printed
form).
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General Information
Vehicles with a high-voltage system (hybrid vehicles)
Extremely Dangerous Due to High-Voltage
The high-voltage system is under high-voltage. Death or serious
bodily injury by elec
Work procedure may vary depending on the type of tools
selected (the tool-specific operating instructions should
therefore be followed).
The refrigerant circuit is to be discharged if parts of th
Note
The entire refrigerant charge can be added to either the
high or low pressure side. Refer to
→ Chapter "Refrigerant R134a Capacities, Refrigerant Oil and
Approved Refrigerant Oi
SEE MORE:
Special tools and workshop equipment
required
Roller -3356-
Wiring Harness Repair Set - Hot Air Blower -VAS1978/14A-
Wedge Set -T10383-
Cleaning Solution -D 009 401 04-
Applicator -D 009 500 25-
Bonding Agent -D 355 205 A2-
Plastic Primer -D 366 PR A1-
Door Cover, Removing and Installing,
Transfer Fuel Pump -G6-, Checking
Special tools and workshop equipment
required
Pressure Tester Kit -VAS6550- with Pressure Tester Kit -
Hose 2 -VAS6550/2-
Pressure Regulator Valve -VAS6550/4-
Vehicle Diagnostic Tester
Fuel-Resistant Measuring Container
A - Checking Fuel Delivery Rate
-