323001414 - 5040D AIR CONDITIONING CONTROLS
INTRODUCTION
The manual climate control system fitted on the vehicle allows changes in the environmental characteristics of the air taken into the passenger compartment (temperature and humidity), ensures it is filtered and guarantees the demisting of the glazed surfaces.The air conditioning system is a comfort factor that contributes to improving the physiological wellbeing of the vehicle occupants.Commands
The following functions are available to the user:- heating the passenger compartment air;
- air recirculation;
- variation of the flow rate of the air entering the passenger compartment;
- direction of the incoming air flows;
- air conditioner activation.
AUTOMATIC CLIMATE CONTROL
Introduction
The automatic climate control system is managed by a control unit (NCL) which is capable, thanks to a sophisticated operating logic, of controlling the temperature in the passenger compartment, heating or cooling the air to produce the desired level of comfort.The climate control system automatically adjusts the following parameters/functions:- Air temperature at the vents;
- Air distribution at the vents;
- Fan speed (continuous variation of the air flow);
- Compressor engagement (for cooling and dehumidifying the air).
Control panel
The keypad for the climate control system control unit is illustrated in the diagram below.
Climate control system control unit
The climate control system is managed automatically by an electronic control unit known as the Climate Control Node (NCL) which is charged with maintaining the air climate control conditions set by the user. The control unit is a node of the B-CAN.The NCL control unit is incorporated in the climate control system control panel and is fitted centrally, in the dashboard.PIN OUT
| PIN | FUNCTION |
|---|---|
| 1 | B-CAN L line |
| 2 | B-CAN H line |
| 3 | Not connected |
| 4 | Not connected |
| 5 | Fan control |
| 6 | Not connected |
| 7 | Solar sensor power supply |
| 8 | Not connected |
| 9 | Upper treated air temperature sensor |
| 10 | Solar sensor analogue input |
| 11 | Analogue earth |
| 12 | Not connected |
| 13 | Not connected |
| 14 | Not connected |
| 15 | Not connected |
| 16 | Not connected |
| 17 | Not connected |
| 18 | Not connected |
| 19 | Not connected |
| 20 | Lower treated air temperature sensor |
| 21 | REC 1 (Recirculation actuator - channel 1 stepper) |
| 22 | REC 3 (Recirculation actuator - channel 3 stepper) |
| 23 | DIST 1 (Distribution actuator - channel 1 stepper) |
| 24 | DIST 3 (Distribution actuator - channel 3 stepper) |
| 25 | MIX 1 (Mix actuator - channel 1 stepper) |
| 26 | MIX 3 (Mix actuator - channel 3 stepper) |
| 27 | Not connected |
| 28 | Not connected |
| 29 | Fan feedback |
| 30 | Power supply from battery |
| 31 | REC 4 (Recirculation actuator - channel 4 stepper) |
| 32 | REC 6 (Recirculation actuator - channel 6 stepper) |
| 33 | DIST 4 (Distribution actuator - channel 4 stepper) |
| 34 | DIST 6 (Distribution actuator - channel 6 stepper) |
| 35 | MIX 4 (Mix actuator - channel 4 stepper) |
| 36 | MIX 6 (Mix actuator - channel 6 stepper) |
| 37 | A/C request |
| 38 | Recirculation / distribution / mixing actuators power supply |
| 39 | ECU power supply (INT/A) |
| 40 | ECU earth |
Operating logic
Firstly, it is necessary to set the desired equivalent temperature; the system will act on all the variables in its control to ensure the required feeling of heat.The following parameters/functions can also be altered manually:- Temperature;
- Fan speed;
- Air distribution pattern with 5 positions;
- Engagement of compressor;
- Defrosting/demisting function;
- Recirculation engagement.
- the MAX DEF function, which is zeroed:
- the recirculation which, with the compressor OFF, is forced open;
- fan speed (continuous variation).
Operation of the automatic climate control system
When the AUTO button is pressed and the knob turned, a temperature value can be set and is automatically maintained. The system will regulate all the parameters so that the desired temperature is reached as quickly as possible in the passenger compartment.During fully automatic operation the only manual intervention required is the possible activation of the following functions:- Air recirculation (to keep the recirculation constantly on or constantly off);
- Front window, rearscreen and exterior rear view mirrors demisting/defrosting.
 | With one or more functions switched on manually, the adjustment of the intake air temperature continues to be managed automatically, except with the compressor switched off: under these circumstances, the air introduced into the passenger compartment cannot be lower in temperature than the outside air. |
Controls
Air temperature adjustment knob (I)When knob (I) is turned clockwise or anti-clockwise, the temperature of the air in the passenger compartment is increased or decreased.The temperature set is shown on the display.When the knob is turned completely to the right or the left until it is in the HI or LO section, the maximum heating or maximum cooling functions respectively are turned on:- HI function (maximum heating)
- LO function (maximum cooling)
- to the windscreen diffusers and front side windows;
- to the centre and side diffusers;
- to the front and rear floor area;
- distributed between the footwell area and the centre and side dashboard vents;
- distributed between the footwell area and the defrosting/demisting diffusers;
- distributed between the diffusers for defrosting/demisting and the centre and side dashboard vents;
- distributed between all the available diffusers.
- Maximum fan speed = all the bars lit up;
- Minimum fan speed = one bar lit up.
 | If, as a result of manual interventions on the functions, the system is no longer capable of guaranteeing that the required temperature in the passenger compartment can be reached and maintained, the temperature set will flash to signal the difficulty encountered by the system and the word AUTO will go out. |
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