DESCRIPTION OF AIR CONDITIONER

2.0 16V JTD, 2.2 16V JTD · MY 2005

The vehicle is equipped with a climate control system for managing the temperature, air flow rate, distribution and recirculation.

The control unit manages the operation of the system by controlling:

• air temperature at the vents;
• air distribution at the vents;
• fan speed (continuous variation);
• compressor engagement (air refrigeration circuit);
• air recirculation engagement.

The system controls are located on the outside of the container which houses the control unit: the following parameters/functions can be controlled manually:

• fan speed;
• distribution arrangement;
• compressor enablement;
• defrosting/demisting;
• recirculation.

2.0 16V JTD, 2.2 16V JTD · Automatic Air Conditioning, MY 2005

The vehicle is equipped with an automatically operated climate control system for managing the temperature, air flow rate, distribution and recirculation which is available in two versions:

• automatic system known as dual zone, with left/right different temperatures for the first and second rows of seats;
• automatic system known as multi zone with additional rear fans which can be operated from the second row to alter the air flow rate to the front vents in the second and third rows.

The control unit manages the operation of the system by controlling:

• air temperature at the vents;
• air distribution at the vents;
• fan speed (continuous variation);
• compressor engagement (air refrigeration circuit);
• air recirculation engagement;
• the MAX-DEF rapid defrosting function (which consists of a collection of measures which make it possible to demist both the windscreen and the rearscreen quickly).

The control unit sets the above parameters so that temperature of the passenger compartment is adjusted to the desired temperature. The system controls are located on the outside of the container which houses the control unit.

The following parameters/functions can be altered manually:

• fan speed;
• distribution arrangement;
• compressor disabling;
• defrosting/demisting;
• recirculation.

The control unit acquires information on the temperature and climate conditions both inside and outside the vehicle by means of special sensors:

• outside temperature sensor, located on the passenger door mirror: the sensor value is acquired by the controls on the door and is suitably "filtered"; it is then sent, via the CAN, to the climate control system control unit;
• lower mixed air temperature sensor;
• upper mixed air sensor;
• inside temperature sensors;
• solar sensor, which measures the sun rays on the windscreen.

According to the calculations made, it sets the passenger compartment air intake speed through the fan motor and the temperature by means of two mixture actuators (one for the right side of the passenger compartment and one for the left side); it also sets the distributions of the flows through another actuator and, lastly, another actuator is responsible for the inside/outside air recirculation function.