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Brief description

Brief description

MCC is a system for manual climate control. The MCC unit consists of a panel with four knobs: two for temperature, one for air distribution and one for fan speed. The electrically heated rear window, air recirculation and A/C (if fitted) are controlled with push-buttons.

The following functions can be controlled manually from the panel:

Temperature, separate for passengers and driver

The control module feeds current to a stepping motor which turns the mixed-air flap for the driver's zone. Another stepping motor turns the mixed-air flap for the front seat passenger zone, and through a link arm, also the mixed-air flap for the rear seat passengers. The mixed-air flap mixes cold air that has passed the evaporator, with warm air that has passed both the evaporator and the heat exchanger. The link to the rear seat passengers mixed-air flap adheres to the temperature for the front seat passenger.

Certain engine types are equipped with a circulation pump to improve the flow of coolant through the heat exchanger. The pump is supplied with +54 current and therefore runs continuously while the car is being driven.

Air distribution

The control module feeds current to a stepping motor which turns the air distribution flap for the driver's zone and front seat passenger as well as for the air distribution flap for the rear seat passengers. The air distribution is also common to the passenger and driver zones. The air is distributed to defrost, floor/rear door windows or dashboard vents/centre vent.

Fan speed

The control module regulates a control unit that supplies the fan motor with current.

Air recirculation

The control module supplies current to a DC motor that turns the air recirculation flap. An LED indicates that air recirculation is engaged.

A/C

The button supplies B+ to DICE if the fan is engaged. An LED indicates that B+ is being supplied. DICE requests A/C engagement.

Electrically heated rear window and door mirrors

This button switches the heated rear window on and off. When switched on, the control module sends a B+ pulse to DICE to request the rear window heating be switched on. An LED indicates that DICE has operated the relay for the electrically heated rear window.