AIR CONDITIONER - DESCRIPTION

1.8, 2.2, 1.9 JTD 8v, 1.9 JTD 16v

The air conditioning is the electrified manual type with the distribution featuring the possibility of shuttering and directing the flows in many ways, thereby guaranteeing an even effect throughout the passenger compartment.

An electronic control unit manages the climate control in the passenger comaprtment regulating the air distribution and mixture by means of special actuators.

The control for different fan speeds is via a resistance partitioner protected against temperature surges by a thermal contact and two relays.

All versions are equipped with a pollen filter and air distribution to the rear passengers.

The manual climate control layout features three rotary controls and 4 buttons.

- the left knob allows the adjustment of the distribution;

- the middlet knob allows the adjustment of the tempreature;

- the right knob allows the adjustment of the fan speed.

The panel contains the buttons for switching on the compressor, recirculation, MAX DEF defrosting/demisting function and the heated rear windscreen.

The following parameters/functions can be altered manually:

- temperature;

- air distribution in 5 positions;

- fan speed;

- compressor enablement;

- defrosting/demisting function;

- recirculation.

The right centre area of the console houses the air recirculation and air conditioning compressor engagement buttons.

See E6021 COMPRESSOR ENGAGEMENT

The left centre area houses the controls for engaging the heated rear windscreen and demisting the windscreen.

See E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING

The manual climate control system control unit has two supply lines, one direct and one ignition-controlled, protected by two fuses in the junction unit under the dashboard.

The passenger compartment air fan receives a power supply from a line protected by a special fuse and operated by a specific relay in the engine compartment junction unit.

1.8, 2.2, 1.9 JTD 8v, 1.9 JTD 16v · RIGHT HAND DRIVE

The air conditioning is electric manual type with the distribution featuring the possibility of adjusting and directing the flows in many ways, thereby guaranteeing an even effect throughout the passenger compartment.

An electronic control unit manages the passenger compartment climate control and adjusts air distiribution and mixing by means of actuators.

The control for different fan speeds is via a resistance partitioner protected against temperature surges by a thermal fuse and two relays.

All versions are equipped with a pollen filter and air distribution to the rear passengers.

The manual climate control layout features three rotary controls and 4 buttons.

- the left button adjusts distribution;

- the central button adjusts temperature;

- the right button adjusts fan speed;

The panel contains the buttons for switching on the compressor, recirculation, MAX DEF and the heated rear windscreen.

The following parameters/functions can be altered manually:

- temperature;

- distribution in 5 positions;

- fan speed;

- compressor enablement;

- defrosting/demisting function;

- recirculation.

The right central area of the panel houses the air recirculation buttons and the air conditioner compressor activation button.

See E6021 COMPRESSOR ENGAGEMENT

The left central part houses the heated rear window and windscreen demist controls.

See E3030 HEATED REAR WINDSCREEN AND DOOR MIRROR DEFROSTING

The manual climate control ECU is supplied by two lines, one direct and the other ignition-operated. These are protected by two fuses in the under-dashboard junction unit.

The fan receives a power supply from a line protected by a special fuse and operated by a specific relay in the engine compartment junction unit.

AUTOMATIC AIR CONDITIONING

An automatic system manages the passenger compartment climate control, in other words the temperature and the ventilation, with recirculation and direction of the air flows, with separate management for the left and right sides of the passenger compartment.

A special control unit manages the operation of the system by controlling:

- air temperature at the vents (driver''s/passenger side);

- air distribution to 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);

- additional engine heating function (JTD versions).

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.

Manual selections always take priority over automatic ones and are memorized until the user cancels the command by returning to automatic operation.

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 driver''s door mirror: the sensor value is acquired by the door control unit (NPG) and is suitably "filtered"; it is then sent via the CAN, to the climate control system control unit;

- lower mixed air temperature sensors (left and right);

- upper mixed air sensors (left and right);

- solar sensor, which measures the sun rays on the windscreen;

- pollution control sensor (AQS) which measure the pollutionrate of the outside air, determining the opening/closing of the recirculation flap for the air distribution unit.

According to the calculations made, the control unit 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.

If the conditions require, the control unit also switches on the air cooling and dehumidification circuit, activating the air conditioning compressor

See E6021 COMPRESSOR ENGAGEMENT

For more details,

See descriptions 5040 AIR CONDITIONING CASING AND COMPONENTS

The vehicle speed signal arrives via the CAN and is used by the climate control system control unit to filter the outside temperature and compensate for the ventilation and dynamic air intake depending on the speed of the vehicle.

When the outside temperature measured is less than or equal to 3°C the message "Danger, Ice" is shown on the instrument panel display with the snow symbol; this situation is also signalled by a buzzer.

The control unit has three supply lines, on direct battery and two ignition operated, protected by fuses in the junction unit under the dashboard; the fan receives a power supply from a line protected by a specific fuse in the engine compartment junction unit.

AUTOMATIC AIR CONDITIONING, RIGHT HAND DRIVE

An automatic system manages the passenger compartment climate control, in other words the temperature and the ventilation, with recirculation and direction of the air flows, with separate management for the left and right sides of the passenger compartment.

A special control unit manages the operation of the system by controlling:

- air temperature at the vents (driver''s/passenger side);

- air distribution to the vents;

- fan speed (continuous variation);

- compressor engagement (air cooling 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);

- engine additional heating function (JTD versions)

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.

Manual selections always take priority over automatic ones and are memorized until the user deliberately cancels the command by returning to automatic operation.

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 driver''s door mirror: the sensor value is acquired by the controls on the door control unit (NPG) and is appropriately "filtered"; it is then sent, via the CAN, to the climate control system control unit;

- lower mixed air temperature sensors (left and right);

- upper mixed air sensors (left and right);

- solar sensor, which measures the sun''s rays on the windscreen;

- pollution sensor (AQS), which measures the outside air pollution index to bring about opening/closure of the air distribution unit recirculation flap.

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.

If the conditions require, the control unit also switches on the air cooling and dehumidification circuit, activating the air conditioning compressor

See E6021 COMPRESSOR ENGAGEMENT

For more details,

See descriptions 5040 AIR CONDITIONING CASING AND COMPONENTS

The vehicle speed signal arrives via the CAN and is used by the climate control system control unit to filter the outside temperature and compensate for the ventilation and dynamic air intake depending on the speed of the vehicle.

When the outside temperature measured is less than or equal to 3°C the message "Danger, Ice" is shown on the instrument panel display with the snow symbol; this situation is also signalled by a buzzer.

The control unit is supplied by three lines, one direct from the battery and two ignition-operated, protected by the under-dashboard junction unit fuses. The fan is supplied by a line protected by a special fuse in the engine compartment junction unit.