Data on working ranges and substitute values.
The pressure sensor receives a 5 volt power supply from the control unit for the heating/air-conditioning system. The sensor signal is evaluated with the help of tables and forwarded to the engine electronic via the K bus. In the process, the refrigerant pressure in the air-conditioning circuit is converted to a load torque and the required fan stage.
Refrigerant pressure-fan stage conversion table
Each fan stage that is determined is transmitted via a telegram from the engine electronics. Prerequisite is a speed less than 80 km/h.
Pressure in bar |
Fan stage |
8 |
0 |
10 |
1 |
14 |
2 |
15 |
3 |
17 |
4 |
18 |
5 |
19 |
6 |
19 |
7 |
20 |
8 |
21 |
9 |
21 |
10 |
22 |
11 |
23 |
12 |
26 |
13 |
29 |
14 |
> 29 |
15 |