Temperature control function - GF83.57-P-2000Q
Model 209.3 /4 except CODE (581) Comfort automatic air conditioning
Networking of temperature control
Shown on vehicle (up to 31.5.04)
Function
The electronically controlled cooling, heating and ventilation system of the automatic air conditioning achieves the desired interior temperature as rapidly as possible or maintains it constantly by:
- the evaporator cooling the air
- the heating system heat exchanger heating the air
- Heating mode
The in-car temperature sensor (N22b1) in the AAC [KLA] control and operating unit (N22) and the in-car temperature sensor (N70b1) (as of 1.6.05) in the overhead control panel control unit (N70) measure the particular interior temperature. The outside temperature is additionally determined by the outside temperature indicator sensor (B14).
The electronic control of the AAC control and operating module (N22) compares the various measured values with the temperature preselected at the temperature selector wheels.
As required, the electronics readjust the settings of the automatic air conditioning by altering the position of the blend air flaps by means of the left blending air flap actuator motor (M2/6) and the right blending air flap actuator (M2/7), or maintain the respective setting constant.
- Cooling mode
The evaporator temperature sensor (B10/6) measures the air temperature at the air outlet of the evaporator, while the in-car temperature sensor (N22b1) in the AAC [KLA] control and operating unit (N22) and the in-car temperature sensor (N70b1) (as of 1.6.05) in the overhead control panel control unit (N70) determine the respective interior temperature.
In addition, the outside temperature is also detected by the outside temperature indicator sensor (B14) and the air humidity by the air humidity sensor (B31/2).
The electronic control of the AAC control and operating module (N22) compares the various measured values with the temperature preselected at the temperature selector wheels.
Depending on requirements, the electronics controls the automatic air conditioning by actuating the refrigerant compressor or keeping the setting constant.
On model 209.4, while driving with an open soft top, the value of the in-car temperature sensor (N22b1) and the value of the in-car temperature sensor (N70b1) (as of 1.6.05) are ignored. The temperature control is controlled in this case with the aid of a fixed characteristic.
The substitute value in the event of a failure of the in-car temperature sensor (N22b1) and the in-car temperature sensor (N70b1) (as of 1.6.05) is 24°C.
| Heating system heat exchanger, location/purpose/function | GF83.20-P-2108P | ||
| Heater water circulation pump, location/task/ function | On vehicles with code (670) Residual engine heat utilization system (REST [MRA]) | GF83.20-P-2109P | |
| Air humidity sensor, location/task/design/ function | GF83.30-P-2125Q | ||
| Control and operating unit for automatic air conditioning, location/task | Model 209.3 | GF83.40-P-2180Q | |
| Model 209.4 | GF83.40-P-2180QA | ||
| Actuator motors for automatic air conditioning, location/task/function | GF83.40-P-2182Q | ||
| Evaporator location/task/design/function | GF83.40-P-2121P | ||
| Expansion valve, location/task/design/ function | GF83.40-P-2123P | ||
| Coolant temperature sensor location/task/ function | GF83.40-P-2184Q | ||
| Refrigerant pressure and temperature sensor location/task/function | GF83.40-P-2171Q | ||
| Refrigerant compressor, location/task/design/ function | GF83.55-P-2100P | ||
| Refrigerant compressor control valve location/ task/function | GF83.55-P-2102P | ||
| Evaporator core temperature sensor, location/ task/function | GF83.57-P-2109P | ||
| Outside temperature display temperature sensor, location/task/function | GF83.57-P-2119Q | ||
| Overhead control panel control unit, location/ task/design | Model 209.3 | GF82.20-P-4110Q | |
| Model 209.4 | GF82.20-P-4110QA | ||
| Heater booster control unit, location/task/ design | Model 209.3 with engine 612 or 646 | GF83.70-P-4059Q |