Ventilation system, function - GF83.10-P-2000GB
MODEL 463.306 /336 /346 as of model year 2011 /YoM 10
MODEL 463.202 /222 /236 /237 as of model year 2009 /YoM 08
MODEL 463.247 /248 /249 /254 /270 /271 /303 /340 /341 as of model year 2007
Illustration of the air outlets in the front
Illustration of the air outlets in the rear
Illustration of the air outlets in the rear (with code (HH7) Additional air conditioning in rear)
Function requirements:
- Circuit 15 On
The EZS control unit (N73) transmits the circuit status via interior CAN.
Function
The ventilation system prevents windows from fogging up, supplies air to the vehicle occupants, and ensures that uniform and pleasant temperatures in the vehicle interior are reached quickly.
General function sequence
Ventilation is provided with the aid of the blower motor (A32m1). When the fresh air/air recirculation flap is adjusted correspondingly, fresh air is supplied to the air conditioner housing via the air inlet. The AAC [KLA] control and operating unit (N22) forwards the request via AC bus to the blower regulator (A32n1), which then actuates the blower motor.
Depending on the current settings on the control and operating unit, the air is directed into the vehicle interior through air ducts and air outlets.
The control and operating unit actuates the following components for adjustment of the air ducting flaps via the AC bus:
- Fresh air/air recirculation flaps actuator motor (M2/5)
- Left blend air flap actuator motor (M2/6)
- Right blend air flap actuator motor (M2/7)
- Footwell flap actuator motors left and right (M2/15)
- Defroster vent flap actuator motors left and right (M2/16)
- Fresh air flaps actuator motor (M2/21)
The ventilation function allows the following operating modes:
- Fresh air mode
- Recirculated air mode
- Defrost mode
- Rear air conditioning system ventilation
Fresh air mode function sequence
The fresh air/recirculated air flap is open and fresh air is delivered into the vehicle interior through the air conditioner housing.
Air recirculation mode function sequence
Briefly pressing the air recirculation mode button (N22s2) on the control and operating unit closes the fresh air/recirculated air flap and thus prevents the supply of outside air. The air only circulates in the vehicle interior and unpleasant odors and harmful gases are kept out. The function indicator in the air recirculation mode button comes on.
Defrost mode function sequence
When the defroster button on the control and operating unit is pressed, all air flaps are closed with the exception of the defroster flaps and the air recirculation flap. These are fully opened. The blend air flaps are set to full warm air supply. The blower motor is actuated by the control and operating unit via the blower regulator to ensure the best possible defrost mode dependent on the temperature of the air flowing out.
The refrigerant compressor (A9) is activated in order to ensure that the air flowing out is dried.
Function sequence rear air conditioning ventilation system (with code (HH7) Additional air conditioning in rear)
Upon actuation of the air volume button (3) integrated in the rear air conditioning control unit (N22/4), the blower motor (M2/1) is actuated via the electronic rear air conditioning blower regulator (N29/2) by means of a direct line corresponding to the selected air volume. The ventilation system ensures that the air is circulated in the rear section of the vehicle interior. The air is sucked in by the rear blower motor and led to the blend air vents via air ducts from where it is distributed in the rear section of the vehicle interior. Using the sliding handles of the blend air vents it is possible to adjust the air flow to the rear passengers' preferences.
The ventilation function of the rear air conditioning circulates the ambient air. Fresh air supply is not possible.
| Component description of refrigerant compressor | A9 | GF83.55-P-2108G | |
| Blower, component description | A32m1, A32n1 | GF83.10-P-2050G | |
| Automatic air conditioning actuator motors, component description | M2/5, M2/6, M2/7, M2/15, M2/16 and M2/21 | GF83.40-P-2197G | |
| Component description for automatic air conditioning control and operating unit | N22 | GF83.40-P-3000G | |
| Electronic ignition/starter switch control unit (EZS), component description | N73 | GF80.57-P-6000G |