Refrigerant Circuit Topology - Excerpt of Air Conditioning

Rear Operating And Air-conditioning Unit (4-zone System)







The following section lists a selection of functions from "function group A" air conditioning).

Anti-mist control ("Auto Defrost")

NOTE: The sensor was fully integrated in the mirror base and is available in the Cayenne for the first time.

An anti-mist control function is also available in automatic mode in the Cayenne for the first time. A condensation sensor measures the window temperature and the relative humidity close to the windows on all Cayenne models. As a result, the dew point on the windshield can be calculated so that the air flow can be adjusted accordingly to ensure that the windshield does not fog up.

Extended air-conditioning functions

NOTE: Auto air-recirculation mode was included in the "extended air-conditioning functions" (a button is not available on the operating and air-conditioning unit).

It is possible to use the "extended air-conditioning functions" to adapt the automatic air-conditioning control individually. On the Cayenne, this refers to the following functions:
- Automatic air-recirculation mode
- Air flow adjustment
- Extended ventilation panel

The "extended air-conditioning functions" can be accessed via the multi-function display on the instrument cluster.

NOTE:
- The functions in the multi-function display are selected using the lower lever on the right of the steering column.
- On vehicles with a multi-function steering wheel, the display can also be operated using the right rotary knob and the buttons on the steering wheel, which can be assigned individually.







NOTE: If the air-conditioning compressor is switched off manually or automatically, air-recirculation mode ends after approx. 3 minutes.

To access the "extended air-conditioning functions", select the options & "Vehicle","Settings" and then "Climate control" .... from the main menu in the multi-function display.

NOTE: If the outside temperature falls below approx. 41° F. (5° C.), air-recirculation mode is deactivated automatically to prevent the windows from fogging up.

Automatic air-recirculation mode:

There is a setting that determines whether the fresh air supply is controlled automatically in conjunction with an air quality sensor.

NOTE: Press and hold the AUTO/REAR mode button for approx. 2 seconds. In REAR mode, the word REAR appears on the front display.

Air flow adjustment:

The settings "low", 'medium' and 'high' can be selected to regulate the intensity of the air flow (air quantity).

NOTE: The child protection button in the driver's door prevents modification of the rear climate zone settings and disables the rear side windows.

Extended ventilation panel:

There is a setting that determines whether the extended ventilation panel (near the compass) on top of the dashboard is switched on or off.

AC MAX mode







In AC MAX mode, the passenger compartment is cooled at maximum power (no automatic mode) in the same way as other models regardless of the current setting:
- Air flow to the passenger vents on the dashboard
- Maximum blower speed
- Coldest possible temperature ("LO" appears on the front display)
- Air-recirculation mode

Setting and controlling the rear climate zones

The rear climate zones can be controlled using the following buttons on the front operating and air-conditioning unit:
1. AUTO/REAR mode button
2. MONO mode button
3. Child protection button (in the driver's door)

Refrigerant circuit

The function and design of the refrigerant circuit in the Cayenne from model year 2011 are largely comparable with the previous model with no significant differences.