A/C Compressor, Refrigerant Lines and Expansion Valve

WARNING: This page is about a different variant/trim than selected.

Courtesy of AUDI OF AMERICA, LLC

A/C Compressor
- With A/C Compressor Regulator Valve -N280-
- Overview. Refer to OVERVIEW - A/C COMPRESSOR POWER UNIT .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.
Seal
- Always Replace
- There are different versions. Refer to the Parts Information.
- Coat the O-ring with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Oil Drain Plug
- Denso A/C compressor - 30 Nm
- Sanden A/C compressor - 10 Nm
- There are different versions. Refer to the Parts Information.
  CAUTION:
  Danger due to refrigerant coming out under pressure when there is a faulty 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 is without a valve. Refer to A/C SYSTEM, GENERAL INFORMATION or GENERAL DESCRIPTION - REFRIGERANT CIRCUIT COMPONENTS .
O-Ring
- Always replace. Refer to the Parts Information for the version.
- Coat with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Refrigerant Line
- To the condenser
Bolt
- 22 Nm
O-Ring
- Always replace. Refer to the Parts Information for the version.
- Coat with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Bolt
- 22 Nm
Refrigerant Line
- From the inner heat exchanger
- Additional weight on the refrigerant line. Refer to ADDITIONAL WEIGHT ON REFRIGERANT LINE .
  NOTE:
  An additional weight (balance weight, resonator in the refrigerant line to reduce noise) may be present on this refrigerant line depending on the refrigerant line version and the production period. Make sure that this component is not touching or can come in contact with other components during operation (noise). Refer to the Parts Information.
  
  To remove and install, remove the right engine mount. Refer to ENGINE MOUNT, REMOVING AND INSTALLING [CNTC, CYFB] / ENGINE MOUNT, REMOVING AND INSTALLING [DAZA] .
High Pressure Side Service Connection
CAUTION:
Danger due to refrigerant coming out under pressure when there is a faulty 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 is without a valve. Refer to A/C SYSTEM, GENERAL INFORMATION or GENERAL DESCRIPTION - REFRIGERANT CIRCUIT COMPONENTS .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to SERVICE CONNECTION DIFFERENCES, DEPENDING ON REFRIGERANT (R134A OR R1234YF) or Parts Information.
- Removing and Installing. Refer to SERVICE CONNECTIONS ON LOW AND HIGH PRESSURE SIDE, REMOVING AND INSTALLING .
Low Pressure Side Service Connection
CAUTION:
Danger due to refrigerant coming out under pressure when there is a faulty 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 is without a valve. Refer to A/C SYSTEM, GENERAL INFORMATION or GENERAL DESCRIPTION - REFRIGERANT CIRCUIT COMPONENTS .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to SERVICE CONNECTION DIFFERENCES, DEPENDING ON REFRIGERANT (R134A OR R1234YF) or Parts Information.
- Removing and Installing. Refer to SERVICE CONNECTIONS ON LOW AND HIGH PRESSURE SIDE, REMOVING AND INSTALLING .
Refrigerant Circuit Pressure Sensor -G805-
- 5 Nm
- To check, use the Vehicle Diagnostic Tester in the"Guided Fault Finding" function. Refer to the appropriate Wiring Diagram.
- Removing and Installing. Refer to Refrigerant Circuit Pressure Sensor -G805-, REMOVING AND INSTALLING .
Refrigerant Line - High Pressure Side
- To the refrigerant line with the inner heat exchanger
  NOTE:
  To remove and install, remove the right engine mount. Refer to ENGINE MOUNT, REMOVING AND INSTALLING [CNTC, CYFB] / ENGINE MOUNT, REMOVING AND INSTALLING [DAZA] .
Refrigerant Line - Low Pressure Side
- To the refrigerant line with the inner heat exchanger
  NOTE:
  To remove and install, remove the right engine mount. Refer to ENGINE MOUNT, REMOVING AND INSTALLING [CNTC, CYFB] / ENGINE MOUNT, REMOVING AND INSTALLING [DAZA] .
O-Ring
- Always Replace. Refer to the Parts Information for the version.
- Coat with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Refrigerant Line with Inner Heat Exchanger
- From the condenser and A/C compressor
- Removing and Installing. Refer to REFRIGERANT LINES WITH INNER HEAT EXCHANGER, REMOVING AND INSTALLING .
O-Ring
- Always Replace. Refer to the Parts Information for the version.
- Coat with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Nut
- 8 Nm
Nut
- 8 Nm
Refrigerant Line with Inner Heat Exchanger
- To the expansion valve
- Removing and Installing. Refer to REFRIGERANT LINES WITH INNER HEAT EXCHANGER, REMOVING AND INSTALLING .
O-Ring
- Always Replace. Refer to the Parts Information for the correct version.
- Coat with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Expansion Valve
- There are different versions. Refer to the Parts Information.
- Removing and Installing. Refer to EXPANSION VALVE, REMOVING AND INSTALLING .
  NOTE:
  There are different versions depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.
Bolt
- 8 Nm
O-Ring
- Replace. Refer to the Parts Information for the version.
- Coat with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
Bolt
- 10 Nm