Switching on Airscarf system, function - GF91.30-P-2010SK
MODEL 171.4 with CODE (403) AIRSCARF system
Function requirements
- Circuit or circuit 1515R ON
- Interior temperature < 40°C
(with code (581b) comfort automatic air conditioning)
Function
The actuation of the left AIRSCARF switch (N72/1s21) or the right AIRSCARF switch (N72/1s22) is input by the upper control panel control unit (N72/1) and sent to the CAN-B (CAN).
| Button operation | Function indicator | Actuation |
|---|---|---|
| Once | Heating stage 3 on | 3 LEDs |
| Twice | Heating stage 2 on | 2 LEDs |
| Three times | Heating stage 1 on | 1 LED |
| Four times | Off | None |
The front HS [SIH], head area ventilation and steering wheel heater control unit (N25/7), depending on the request, actuates the following components:
- Left head area ventilation heating element (R22/5) and
- Left head area ventilation fan (M4/10)
or:
- Right head area ventilation heating element (R22/6) and
- Right head area ventilation fan (M4/11)
The left head area ventilation fan (M4/10) and right head area ventilation fan (M4/11) are switched on with a delay of approx. 10 s to prevent voltage peaks.
The selected heating stage is sent cyclically by the front HS [SIH], head area ventilation and steering wheel heater control unit (N25/7) to CAN-B (CAN).
The upper control panel control unit (N72/1) as a function of the message actuates the LEDs in the left AIRSCARF switch (N72/1s21) or right AIRSCARF switch (N72/1s22).
Actuation of heating
The 3 heating stages are implemented by a pulsed actuation of the voltage for the left head area ventilation heating element (R22/5) or right head area ventilation heating element (R22/6)
Actuation of ventilation
The left head area ventilation fan (M4/10) and the right head area ventilation fan (M4/11) are supplied with power as a function of the selected heating stage.
With the Vario roof open and as a function of the ground speed (signal from instrument cluster (A1)), the speed of the left head area ventilation fan (M4/10) or the right head area ventilation fan (M4/11) is increased in the particular heating stages by an increase in voltage.
It is possible to switch the Airscarf system on and off and to a different setting if the function prerequisites are met.
| Airscarf system switch, location/task | GF91.30-P-2102SK | |
| Airscarf system fan, location/task | GF91.30-P-2100SK | |
| Airscarf system heating element, location/ task | GF91.30-P-2101SK | |
| Seat heater/head area ventilation/ steering wheel heater control unit, location/task | GF91.30-P-3008SK | |
| Upper control panel control unit, location/task/ design/function | GF54.21-P-4105SK | |
| Electronic ignition switch control unit, location/purpose | GF80.57-P-4120SK | |
| Vario roof control unit, location/task | GF77.39-P-3310SK | |
| Control and operating module for comfort automatic air conditioning, location/purpose | On vehicles with code (581b) convenience automatic air conditioning | GF83.40-P-2181SK |