Audi Q3 Owners & Service Manuals

Audi Q3: System Overview - Refrigerant Circuit

HD = High-pressure end

ND = Low-pressure end

Audi Q3. System Overview - Refrigerant Circuit

1 - A/C Compressor Regulator Valve -N280-

  • To check, refer to Vehicle Diagnostic Tester in the "Guided Fault Finding" function, → Chapter "A/C Compressor Regulator Valve -N280-, Checking Switch-On Signal" and → Wiring diagrams, Troubleshooting & Component locations.

  Note

  • Certain functions on the A/C Compressor Regulator Valve -N280- (for example, a stuck valve or a disruption in the coil) can lead to a complaint regarding the A/C compressor (A/C system doesn't cool, the evaporator ices over, etc.). If the cause is with the A/C Compressor Regulator Valve -N280- (and not the A/C compressor itself), the A/C compressor can be serviced by replacing the A/C Compressor Regulator Valve -N280-. Refer to → Refrigerant R134a Servicing; Rep. Gr.87; Refrigerant Circuit Components, Replacing (Refrigerant R134a, Servicing; Refrigerant Circuit Components, Replacing).
  • The A/C Compressor Regulator Valve -N280- is not available as a replacement part for all A/C compressors. If the A/C Compressor Regulator Valve -N280- is not available as an individual A/C compressor part (different versions), then the entire A/C compressor must be replaced. Refer to the Parts Catalog.

2 - A/C Compressor

  • Overview. Refer to → Chapter "Overview - A/C Compressor Power Unit".

3 - Pressure Relief Valve

  Caution

Danger due to refrigerant coming out under pressure when there is a defective valve.

Danger of frost bite to skin and other parts of the body.

Only remove when the refrigerant circuit is empty. The connection does not have a valve.

4 - Oil Drain Plug

5 - Sealing Cap

  • With seal
  • Always to be screwed on

6 - Low Pressure Side Service Connection

  • for measuring and emptying

  Caution

Danger due to refrigerant coming out under pressure when there is a defective valve in the refrigerant circuit.

Danger of frost bite to skin and other parts of the body.

Only remove when the refrigerant circuit is empty. The connection does not have a valve. Refer to → Refrigerant R134a Servicing; Rep. Gr.87; A/C System, General Information (Refrigerant R134a Servicing; A/C System, General Information).

7 - Evaporator

8 - Expansion Valve

  • Overview. Refer to → Chapter "Overview - Condenser, A/C Compressor, Expansion Valve, Refrigerant Line".

9 - High Pressure Sensor -G65-

  • To check, refer to Vehicle Diagnostic Tester in the "Guided Fault Finding" function, → Chapter "High Pressure Sensor -G65-, Checking Pressure Signal" and → Wiring diagrams, Troubleshooting & Component locations.
  • Removing and installing. Refer to → Chapter "High Pressure Sensor -G65-, Removing and Installing".

10 - Connection with Valve

11 - Condenser

  • Overview. Refer to → Chapter "Overview - Condenser, Dryer Cartridge".

12 - Receiver/Dryer

  • The receiver/dryer is integrated in the condenser.

13 - High Pressure Side Service Connection

  • for measuring, emptying and filling

  Caution

Danger due to refrigerant coming out under pressure when there is a defective valve in the refrigerant circuit.

Danger of frost bite to skin and other parts of the body.

Only remove when the refrigerant circuit is empty. The connection does not have a valve. Refer to → Refrigerant R134a Servicing; Rep. Gr.87; A/C System, General Information (Refrigerant R134a Servicing; A/C System, General Information).

14 - Sealing Cap

  • With seal
  • Always to be screwed on

15 - Belt Pulley

  • Replace. Refer to → Chapter "Overview - Belt Pulley".
  • Currently the belt pulley for the "Delphi" A/C compressors cannot be removed separately.

  Note

The A/C compressor on vehicles with a 5-cylinder engine (Audi RS Q3) have two ribbed belts. The A/C compressor has a belt pulley with a double belt guide.

    READ NEXT:

     Overview - Condenser

    Overview - Condenser, Dryer Cartridge   Note There are different versions of the condenser, radiator and auxiliary radiator. Observe the correct allocation of these components. Refer t

     High Pressure Sensor -G65-, Removing and Installing

      Note When the High Pressure Sensor -G65- is removed, the cooling output cannot be checked. The Climatronic Control Module -J255-/A/C Control Module -J301- control head does not switch

     Expansion Valve, Removing and Installing

    Special tools and workshop equipment required Engine Bung Set -VAS6122- Removing - Remove the refrigerant pipes from the expansion valve. Refer to → Chapter "Refrigerant Line

    SEE MORE:

     Component Location Overview - Storage Compartment/Covers

    1 - Center Console Overview. Refer to → Chapter "Overview - Center Console". 2 - Driver Side Instrument Panel Cover Overview. Refer to → Chapter "Overview - Driver Side Instrument Panel Cover". 3 - Trim Panel For the steering column

     Multi Media Interface

    Traffic safety information Audi recommends only using certain Infotainment system functions while the vehicle is stationary, such as entering a destination or pairing a mobile device. Always be prepared to stop operating the Infotainment system in the interest of your safety and the safety of other

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