Temperature control function - GF83.57-P-2000P

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Model 203.0 /2 /7 up to 31.5.01 with CODE (581) Automatic air conditioning

Model 203.0 /2 /7 as of 1.6.01 with CODE (581) Comfort automatic air conditioning

Fig 1: Networking Of Temperature Control, Shown On Vehicle Up To 31.5.02

Networking of temperature control, shown on vehicle up to 31.5.02

Function

The electronically controlled cooling, heating and ventilation system of the comfort automatic air conditioning (C-AAC) achieves the desired interior temperature as rapidly as possible or maintains it constantly throughout:

Cooling of the air by means of the evaporator.
the heating system heat exchanger heating the air.

Heating mode
The in-car temperature sensors (N22/7b1, N70b1) measure the respective interior temperatures.

In addition the outside temperature is also determined by the outside temperature indicator temperature sensor (B14), the humidity is determined by the C-AAC multifunction sensor (B31) and the intensity and direction of the solar radiation is determined by the C-AAC sun sensor (4 sensors in total) (B32/2). The electronic control of the comfort AAC push-button control unit (N22/7) compares the various measured values with the temperature preselected at the temperature push-button.

Depending on requirements, the electronic circuit regulates the comfort automatic air conditioning (C-AAC), by altering the position of the blend air flaps using the left blending air flap actuator motor (M2/6) and right blending air flap actuator motor (M2/7) or it holds each setting at a constant value.
Cooling mode
The evaporator temperature sensor (B10/6) measures the air temperature at the evaporator's air outlet while the in-car temperature sensors (N22/7b1, N70b1) detect the respective interior temperature. In addition the outside temperature is also determined by the outside temperature indicator temperature sensor (B14), the humidity is determined by the C-AAC multifunction sensor (B31) and the intensity and direction of the solar radiation is determined by the C-AAC sun sensor (4 sensors in total) (B32/2).

The electronic control of the comfort AAC push-button control unit (N22/7) compares the various measured values with the temperature preselected at the temperature push-button. Depending on requirements, the electronic circuit alters the settings of the comfort automatic air conditioning (C-AAC) by actuating the refrigerant compressor or maintaining the particular setting constant.

The in-car temperature sensor (N70b1) is installed in vehicles up to 31.5.02 and as from 1.6.05 in the overhead control panel control unit. On vehicles between 1.6.02 up to 31.5.05, the interior temperature is determined solely by the in-car temperature sensor (N22/7b1), which is integrated into the comfort AAC control and operating unit (N22/7).

Control and operating unit comfort automatic air conditioning location/task	On vehicles up to 23.4.04	GF83.40-P-2181PP
	On vehicles as from 24.4.04 with code (581) Comfort automatic air conditioning	GF83.40-P-2181PQ
Actuator motors for comfort automatic air conditioning, location/task/function		GF83.40-P-2183P
Heating system heat exchanger, location/ purpose/function		GF83.20-P-2108P
Heater water circulation pump, location/task/ function		GF83.20-P-2109P
Evaporator location/task/design/function		GF83.40-P-2121P
Expansion valve, location/task/ design/function		GF83.40-P-2123P
Air conditioning coolant temperature sensor location/task/function		GF83.40-P-2155P
Refrigerant pressure and temperature sensor location/task/function		GF83.40-P-2171P
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 sensor, location/task/ function	On vehicles up to 23.4.04	GF83.57-P-2110P
	In vehicles as of 24.4.04	GF83.57-P-2110PP
Multifunction sensor location/task/ function		GF83.10-P-2148P
Sun sensor location/task/function		GF83.57-P-2111P
Overhead control panel control unit, location/ task/design		GF82.20-P-4110A