Tempmatic air conditioning pushbutton control module position/function

P83.30-2040-11

1 Temperature selection wheels

2 Blower switch

3 Air distribution switch

 Recirculated air pushbutton

 EC push button

 Rest pushbutton

 Reheat pushbutton

N19/1 Tempmatic (Tempmatic A/C) control and operating module

Function

The control and operating module (N19/1) of the Tempmatic (Tempmatic A/C) permits performance of adjustments required by the driver, such as:

 Temperature by using the temperature selection wheels (1)

 Air quantity by using the blower switch (2)

 Air distribution by using the air distribution switch (3)

 Recirculated air by pressing the recirculated air pushbutton
(  )

 Activation of residual engine heat recirculation, with ignition off, by pressing the Rest pushbutton

(  )

 Switching off the cooling by pressing the EC pushbutton ()

 Air drying operation by pressing the reheat pushbutton

(  )

Furthermore the control module integrated into the control and operating (N19/1) module takes over regulation and control of systems, such as:

 comparison of the preselected / actual temperatures and adjustment of the air output temperature to the air outlets

 automatic switching from fresh air to recirculated air

 electrical actuation of the refrigerant compressor

 actuation of the auxiliary ventilator

The control and operation module (N19/1) can be diagnosed so that faults arising are stored in a fault memory, which can be read out with the aid of the HHT.

When changing the control and operating module (N19/1) a variant coding should be performed with the aid of the Hand-Held Tester or DMNL air conditioning.

 In the new control and operating module an outside temperature of < 15 °C can be stored, so that when the air conditioning system is switched on (  does not light up) no cooling takes place. The air conditioning only functions following a test drive, because then with a speed signal of > 20 km/h the stored outside temperature value < 15 °C is overwritten by the actual value.