2010.5 Citroen DS4 Owner's Manual

77Comfort
Recommendations for ventilation and air con ditioning
If after an extended stop in sunshine, the interior temperature is very high, first ventilate the passenger compar tment for a few moments.
Put the air flow control at a setting high enough to quickly change the air in the passenger compar tment. The air conditioning system does not contain chlorine and does not present any danger to the ozone layer.
In order for these systems to be fully effective, follow the operation and maintenance guidelines below:  To obtain an even air distribution, take care not to obstruct the exterior air intake grilles located at the base of the windscreen, the nozzles, the vents and the air outlets, as well as the air extractor located in the boot.  Do not cover the sunshine sensor, located on the d ashboard; this is used for regulation of the digital air conditioning system.  Operate the air conditioning system for at least 5 to 10 minutes, once or twice a month to keep it in per fect working order.  Ensure that the passenger compar tment filter is in g ood condition and have the filter elements replaced regularly (refer to the "Checks" secti on). We recommend the use of a combined passenger compa r tment filter. Thanks to its special active additive, it contributes to the purification of the air breathed by the occupants and the cleanliness of the passenger compar t ment (reduction of allergic symptoms, bad odours and greasy deposits).  To ensure correct operation of the air conditioning system, you are also advised to have it checked regularly as recommended in the Maintenanc e and Warranty Guide.
 If the system does not produce cold air, switch it off and contact a CITROËN dealer or a qualified workshop. When towing the maximum load on a steep gradient in high temperatures, switching off the
air conditioning increases the available engine power and so improves the towing ability.
The condensation created by the air conditioning results in a discharge of water under the vehicle which is per fectly normal.

Manual air conditioning
1. Temperature adjustment
 Turn the dial to select a
position between blue (cold) and red (hot) so as to adjust the temperature to your requirements.
2. Air fl ow adjustment
This dial is used to increase or decrease the speed of the air booster fan.
3. Air distribution adjustment
This dial is used to arrange the distribution of air in the passenger compar tment by combining several air outlets.
 If you place the air flow control in position 0 , the system is deactivated. However, a slight flow of air, due to the movement of the vehicle, can still be felt.
 Turn the dial from position 1 to position 5 to obtain a comfor table air flow.
Windscreen and side windows.
Windscreen, side windows and footwells.
Footwells.
Central and side vents.
The air distribution can be adapted by placing the dial in an intermediate position.

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4. Air intake/Air recirculation
The intake of exterior air prevents the formation of mist on the windscreen and side windows.
 Press the button to recirculate the interior air. The indicator lamp comes on to confirm this.
This function allows hot or cold air to be delivered selectively and more quickly.
5. Air conditioning On/Off
The air conditioning is designed to operate effectively in all seasons, with the windows closed.
Switching on
 Press the "A /C" button, the button's indicator lamp comes on.
The air conditioning does not operate when the air flow adjustment control 2is in position " 0 ".
The recirculation of interior air isolates the passenger compar tment from exterior odours and smoke.
Return to exterior air intake as soon as possible
to prevent deterioration of the the air quality and the formation of mist.
 Press the button again to permit the intake of exterior air. The indicator lamp goes off to confirm this.
It enables you to: - lower the temperature, in summer, - increase the effectiveness of the demisting in winter, above 3 °C.
Switching off
 Press the "A /C" button again, the button's indicator lamp goes off. Switching off may affect comfor t levels (humidity, condensation).

Dual-zone digital air conditioning The air conditioning system operates when the engine is running.
Automatic operation
1. Automatic comfort programme
We recommend the use of one of the three AUTO modes available: they provide optimised regulation of the temperature in the passenger
compar tment according to the comfor t value that you have chosen. These three modes automatically adjust the air flow, according to the desired setting, while also maintaining the desired comfor t value.
 Press the "AUTO" button repeatedly: - a first indicator lamp comes on; the "light" setting mode is selected, - a second indicator lamp comes on; the "medium" setting mode is selected, - a third indicator lamp comes on; the "intense" mode setting is selected.
When the engine is cold, the air flow will reach its optimum level
progressively, taking account of the weather and the desired comfor t level so as to avoid too great a distribution of cold air. On entering the vehicle, if the interior temperature is much colder or warmer than the comfor t value, there is no need to change the value displayed in order to obtain the comfor t required. The system corrects the difference in temperature automatically and as quickly as possible.
This system is designed to operate effectively in all seasons, with the windows closed.

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2. Driver's side adjustment 4. Automatic visibility programme
For maximum cooling or heating of the passenger compar tment, it is possible to exceed the minimum value 14 or the maximum value 28.  Turn control 2 or 3 to the left until
"LO" is displayed or to the right until "HI" is displayed.
See "Front demisting - defrosting". 3. Passenger's side adjustment
The driver and front passenger can each adjust the temperature to their requirements. The value indicated on the display corresponds to a level of comfor t and not to a temperature in degrees Celsius or Fahrenheit.
 Turn control 2 or 3 to the left or to the right respectively to decrease or increase
this value.
A setting around the value 21 provides optimum comfort. However, depending on your requirements, a setting between 18 and 24 is normal. You are advised to avoid a left/right setting difference of more than 3.
Manual operation
If you wish, you can make a different choice from that offered by the system by changing a setting. The the "AUTO" indicator lamps go off; the other functions will still be controlled automatically.  Pressing the "AUTO" button returns the system to completely automatic operation.
With Stop & Star t, when demisting has been activated, the STOP mode is not available.

5. Air conditioning On/Off
 Press this button to switch off the air conditioning.
Switching the system off could result in discomfor t (humidity, condensation).  Press this button again to return to automatic operation of the air conditioning. The indicator lamp on the "A /C" button comes on.
6. Air distribution adjustment
 Press one or more buttons to
direct the air flow towards:
- the windscreen and side windows (demisting or defrosting), - the outer and centre air vents, - the footwells. You can combine the three orientations to obtain the desired air distribution.
7. Air fl ow adjustment
 Turn this control to the left to decrease the air flow or to the right to increase the air flow.
8. Air intake/Air recirculation
 Press this button for recirculation
of the interior air. The indicator lamp in the button comes on.
The air flow indicator lamps, between the two fans, come on progressively in relation to the value requested.
9. "REST" function: ventilation with the engine off
Even with the engine is off, you can operate the ventilation for a few minutes.
Air recirculation enables the passenger compar tment to be isolated from exterior odours and smoke.  As soon as possible, press this button again to permit the intake of outside air and prevent the formation of condensation. The indicator lamp in the button goes off.
For example, while you are away from the vehicle, the passengers can still enjoy some air circulation without having the engine running. This function is available after switching on the ignition, as well as after stopping the engine. The period that the function is available depends on the state of charge of the battery. You can activate the "REST" function while the air conditioning control screens are on.

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Switching the system off
 Turn the air flow control to the left until all of the indicator lamps go off.
This switch does not operate the air conditioning, only the air fan. When the "REST" function is activated, you cannot modify the temperature, air flow and distribution settings: these are controlled automatically according to the ambient temperature. This function is not available in the STOP mode of Stop & Star t.
Avoid prolonged operation in interior air recirculation mode or driving for long periods with the system off (risk of
condensation and deterioration of air quality).
On switching on the engine - The control screens come on: the function is available. - Pressing the REST button activates the ventilation for a few minutes. Activation of the function is confirmed by the display of two dashes in the control screens and four air flow level indicator lamps. - The function can be deactivated and reactivated if the control screens are on. - The screens go off at the end of this period.
On stopping the engine - While the control screens remain on: the function is available. - Pressing the REST button activates the ventilation for a few minutes. Activation of the function is confirmed by the display of two dashes in the control screens and four air flow level indicator lamps. Locking the vehicle has no effect on this function. - The control screens go off at the end of this period. Pressing again before the end of the period interrupts off the ventilation definitively: the control screens go off and the function is no longer available.
This action switches off the air conditioning and the ventilation. Temperature related comfor t is no longer assured but a slight flow of air, due to the movement of the vehicle, can still be felt.  Modify the settings (temperature, air flow or air distribution) or press the "AUTO" button to reactivate the system with the values set before it was switched off.

Front demist - defrost
These markings on the control panel indicate the control positions for rapid demisting or defrosting of the windscreen and side windows.
With manual air
conditioning
 Put the temperature, air flow and distribution controls to the dedicated marked position.  Put the air intake control to the "Exterior air intake" position (indicator lamp on the control off).  Switch on the air conditioning by pressing the "A /C" button; the warning lamp in the button comes on.
With digital dual-zone air
conditioning
With Stop & Star t, when the demisting,
air conditioning and air flow functions are activated, STOP mode is not available.
Automatic visibility programme
 Select this programme to demist or defrost the windscreen and side windows as quickly as possible. The system automatically manages the air conditioning, air flow and air intake, and provides optimum distribution towards the windscreen and side windows.  To stop the programme, press either the "visibility" button again or "AUTO" , the warning lamp on the button goes off and the warning lamp on the "AUTO"button comes on.
The system star ts again with the values in use before it was overridden by the visibility programme.
With Stop & Star t, when demisting has been activated, the STOP mode is not available.