General

PREAMBLE

Manual air conditioning

The manual air conditioning system allows the user to request compressor engagement to produce cold air by simply pressing a dedicated button.

Temperature, airflow and air distribution are adjusted manually by the user.

Automatic air conditioning

The automatic air conditioning system automatically maintains the set point selected by the user.

Automatic climate control acts on the following:

• airflow,
• cabin air temperature, measured by 2 sensors (left and right),
• air distribution in the cabin (air outlet distribution),
• air recirculation.

The desired temperature is obtained by mixing cold and hot air through the correct positioning of the blend flap, driven by a stepper motor.

• Heating is provided by the heater matrix of the engine cooling circuit.
• Cooling is produced by a conventional refrigeration system through an evaporator.
• Airflow is produced by a DC motor (blower).
• Air distribution and air intake are controlled by flaps driven by stepper motors.

Note: The control panel also includes control of the heated rear window, which is completely independent of the other air conditioning functions.

BLOCK DIAGRAMS

Manual air conditioning

Simple cooling

Key:

• single arrow: wired link,
• triple arrow: multiplexed link.

(*): on HDi engines, depending on version and country

LINKS
LINK NO.	SIGNAL	SIGNAL TYPE
1	Gear change information	CAN
2	Engine coolant temperature information	ANALOGUE
3	Auxiliary electric heater control (*)	ON / OFF
4	Auxiliary burner control (*)	ON / OFF
5	Refrigerant compressor control	ON / OFF
6	Refrigerant compressor engagement request	VAN CONFORT
7	Refrigerant compressor engagement request	ON / OFF
8	Control panel indicator light control	ON / OFF
9	Evaporator temperature information	ANALOGUE
10	Outside air temperature information	ANALOGUE
11	Outside air temperature information	VAN CAR 2
12	Fan unit medium speed control	ON / OFF
13	Refrigerant pressure information	ANALOGUE
14	Fan unit speed information	ANALOGUE
15	Fan unit low speed control	ON / OFF
16	Fan unit high speed control	ON / OFF
17	Refrigerant compressor engagement authorisation request	CAN
18	Refrigerant compressor engagement authorisation	CAN
	Refrigerant compressor state change inhibition
	Engine running information
	Engine coolant temperature information
	Refrigerant liquid pressure information
	Fan unit speed information

Automatic air conditioning

Automatic climate control

Key:

• single arrow: wired link,
• triple arrow: multiplexed link.

(*): on HDi engines, depending on version and country

(*): on HDi engines, depending on version and country

SCHEMATIC DIAGRAM

Manual air conditioning

Simple cooling

Key:

• A: Cold air circuit
• B: Warm air circuit
• 20: Expansion valve
• 21: Air conditioning evaporator
• 22: Refrigerant condenser
• 23: Refrigerant compressor
• 24: Auxiliary electric heater (*)
• 25: Motor
• 26: Heater matrix
• 27: Auxiliary burner (*)

(*): on HDi engines, depending on version and country

Automatic air conditioning

Automatic climate control

Key:

• A: Cold air circuit
• B: Warm air circuit
• 20: Expansion valve
• 21: Air conditioning evaporator
• 22: Refrigerant condenser
• 23: Refrigerant compressor
• 24: Auxiliary electric heater (*)
• 25: Motor
• 26: Heater matrix
• 27: Auxiliary burner (*)
• 28: Air distribution in the cabin
• 29: Air temperature adjustment
• 8080: Climate control computer

(*): on HDi engines, depending on version and country

DESCRIPTION OF USER CONTROLS AND DISPLAY

Manual air conditioning

Simple cooling

Key:

• 30: Cabin air temperature control
• 31: Blower speed selection control
• 32: Air distribution mode selection control
• 33: Heated rear window and heated mirrors defrost control
• 34: Refrigerant compressor engagement control
• 35: Air recirculation control

Automatic air conditioning

Automatic climate control

Key:

• 31: Blower speed selection control
• 32: Air distribution mode selection control
• 33: Heated rear window and heated mirrors defrost control
• 34: Refrigerant compressor engagement control
• 35: Air recirculation control
• 36: Backlit liquid crystal display
• 37: Automatic control activation button
• 38: Set temperature adjustment control, right side
• 39: Cabin air temperature sensor
• 40: Windscreen demisting control
• 41: Set temperature adjustment control, left side

Display

Simple cooling

The simple cooling function has no dedicated display.

Automatic climate control

The display is provided by a screen integrated into the climate control panel.

The display provides the following functions:

• showing the user's selections and the system status,
• providing feedback to the user on the actions performed,
• indicating any system faults.

Control panel lighting

Simple cooling

The lighting logic of the automatic climate control panel is as follows:

Note: The indicator lights for cooling, recirculation and defrost functions come on when the respective functions are activated, regardless of other conditions.

Automatic climate control

The lighting logic of the automatic climate control panel is as follows:

Other lighting management features:

• in "night driving" mode, the display does not turn off while the defrost function and/or the visibility function is active,
• the display lights up for 16 seconds for any action on the control panel.