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

MODEL 215 

Fig 1: Identifying Temperature Control Interlinkage Components

Function 

The electronically controlled refrigeration, heating and ventilation system for automatic air conditioning reaches the desired passenger compartment temperature as quickly as possible or holds it constant by:

• Cooling the air in the evaporator
• Heating the air in the heater core

• Heating mode 

  The heat exchanger temperature sensors (B10/2 and B10/3) measure the air temperature at the heater core while the in-car temperature sensors (N22b1 and N70b1) measure the associated temperature in the passenger compartment.

  In addition the outdoor temperature is measured by the outdoor temperature sensor (B14) and the intensity and direction of the sun radiation by the sun sensor (B32/2).

  The electronic circuitry in the automatic A/C pushbutton control module (N22) compares the various values with the temperature set with the temperature buttons.

  The electronic circuitry regulates the automatic air conditioning as required by actuating the duovalves or maintaining the present setting.

• Air conditioning mode 

  The evaporator temperature sensor (B10/6) measures the air temperature at the evaporator air outlet while the in-car temperature sensors (N22b1 and N70b1) measure the associated temperature in the passenger compartment.

  In addition the outdoor temperature is measured by the outdoor temperature sensor (B14) and the intensity and direction of the sun radiation by the sun sensor (B32/2).

  The electronic circuitry in the automatic A/C pushbutton control module (N22) compares the various values with the temperature set with the temperature buttons.

  The electronic circuitry regulates the automatic air conditioning as required by actuating the A/C compressor or maintaining the present setting.