Compressor HVAC: Description and Operation

A/C Compressor

• Depending on time period of production and on engine, compressor construction type may vary. Refer to => [ Refrigerant Circuit Components Overview ] Refrigerant Circuit Components Overview and Electronic Parts Catalog (ETKA).

• For 6 cylinders FSI engine and 8 cylinder FSI / TFSI engine, the A/C compressor can only be removed from the bracket if the refrigerant circuit has been discharged. Refer to 6 cylinder=> [ Compressor ] Compressor or 8 cylinder => [ Compressor ] Compressor.

• At the start of production, the A/C compressors manufactured by "Denso" (type "6 SEU 14") were installed. Compressors from other manufacturers may also be installed at a later time.

• These A/C compressors are available as replacement parts with different oil fill capacities, therefore note capacity on A/C compressor.

• Depending on A/C compressor type, different refrigerant oil fill capacities are designated for the refrigerant circuit. The reason for the different oil capacities in the A/C compressor for an otherwise identical refrigerant circuit lies in the design of the A/C compressor itself, note these oil capacities. Too much oil in the circuit leads to higher pressures and reduces cooling performance of the system. Too little oil may lead to lubrication problems in the compressor.

• If a new compressor has been installed or new refrigerant oil has been put into the A/C compressor (for example, after flushing refrigerant circuit), the A/C compressor must be turned by hand approximately 10 revolutions. This ensures that the A/C compressor is not damaged when activated.

• V6 TDI=> [ Compressor ] Compressor

• V6 TFSI=> [ Compressor ] Compressor

• W12 => [ A/C Compressor from Bracket ] A/C Compressor from Bracket

• V8 FSI=> [ Compressor ] Compressor

• V8 TFSI=> [ Compressor ] Compressor