Blower function - GF83.10-P-2102-02P

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Operation

The HEAT (N18) or AAC (N22) control and operating module sends a control voltage of 0 - 100 % over the AC bus to the blower regulator (A32n1). This regulates the operating voltage for the blower motor (A32m1) depending on the control voltage applied from 0 to 100 %.This facilitates control of the blower motor speed from 0 - 100 %.

The blower motor regulator (operating voltage) is influenced by the following factors:

blower motor output setting manual or AUTO (for automatic air conditioning only)
Operating functions:
air distribution duct

EC or AC-OFF (for automatic air conditioning only)

REST (for automatic air conditioning only, utilization of residual engine heat and taxi)
Mode status (heating, cooling)
Coolant temperature
Vehicle speed
Fresh air/recirculation flap setting
Flap positions
Circuit 15 (blower motor (A32m1) ON), starter running (blower motor (A32m1) OFF)

The blower motor output can be increased in relation to outside temperature.

in order to ensure that the windows are not fogged up when outside temperatures are low and the passenger compartment temperature level doesn't drop, the blower motor output is increased at outside temperatures of -10 °C to -15 °C by a maximum of 15 %.