display Citroen C4 PICASSO 2008 1.G Service Manual
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2 - Adjustment of temperature
The system can regulate temperature on an indepen-dent  basis  for  the  left  hand  side  and  right  hand  side as well as for the rear of the passenger compartment. Front  and  rear  passengers  can  thus  adjust  their  own temperatures.
To display the desired temperature, press button :
- – to decrease the temperature,
- + to increase the temperature.
An  adjustment  around  21  will  provide  an  agreeable temperature level. However, depending on your prefe-rence, anything between 18 and 24 is quite normal.
For  optimum  comfort,  it  is  recommended  to  avoid  an adjustment  difference  greater  than  3  between  right and left.
Note : Actual temperatures experienced in the passenger compartment  are  dependent  on  external  factors  and  for this reason might not be identical to those displayed.
On  entering  the  vehicle,  the  inside  temperature  may be much colder (or hotter) than would be comfortable. It serves no purpose to alter the temperature displayed in  an  attempt  to  attain  your  preference  more  rapidly. The system automatically does all in its power to make up the difference in temperature as soon as possible.
A U T O M A T I C   A I R   C O N D I T I O N I N G
3 - Adjustment of the air blower speed
The air blower operates only when the engine is run ning (except when the REST function is activated).
 T o   a d j u s t   t h e   fl   o w   o f   a i r ,   p r e s s   o n   t h e   b u t t o n   :
 t o   i n c r e a s e   t h e   a i r   fl   o w
 t o   d e c r e a s e   t h e   a i r   fl   o w   ( t h i s   b u t t o n   a l s o   h a s  the REST function)
 T h e   l e v e l   o f   a i r   fl   o w   i s   i n d i c a t e d   o n   t h e   d i s p l a y   b y   t h e   p r o g r e s s i v e   fi   l l i n g   o f   t h e   v e n t i l a t o r   b l a d e s .
Note  :  If  you  place  the  air  blower  on  position 0,  the system  is  deactivated.  The  air  blower  display  will  be empty, with the indication OFF.
Function for retaining ventilation with the engine switched off
The REST function is available when you switch on the ignition and when you stop the engine.
This  function  allows  you  to  retain  ventilation  in  the passenger compartment for a few minutes, even with the engine stopped.
When you leave the vehicle, any passengers present  c a n   s t i l l   h a v e   t h e   b e n e fi   t   o f   a i r   c i r c u l a t i o n ,   e v e n   t h o u g h  the engine is not running. 
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(Function  for  retaining  ventilation  with  the  engine switched off : REST function, continued…)
Engine stopped, ignition switched on :-  The  displays  will  light  up,  with  the  air  blower  shown empty as long as the function is available.-  A  press  on  the  REST  button  activates  the  function for a timing of just a few minutes. Two blades of the  b l o w e r   w i l l   fi   l l   t o   s i g n i f y   t h a t   t h e   f u n c t i o n   i s   a c t i v e .-  It can be deactivated and reactivated during the timing.-  At the end of the timing, the display will go off.
On stopping the engine :-  The displays remain lit up, the blower is shown em pty and the function can be activated for 30 seconds.-  A  press  on  the  REST  button  during  the  next  30  sec-onds  activates  the  function  for  a  timing  of  several  min-utes.  The  duration  and  availability  of  the  function   are variable  according  to  the  state  of  charge  of  the  battery (a protection to guarantee engine starting). Two blower  b l a d e s    fi   l l    u p    t o    s i g n i f y    t h a t    t h e    f u n c t i o n    i s    a c t i v e .    I t    r e -mains  active,  even  after  the  doors  have  been  locked , until the end of the timing. -    A   f u r t h e r   p r e s s   b e f o r e   t h e   e n d   o f   t h e   t i m i n g   d e fi   n i t i v e l y  stops the function.
Note : This button does not activate the air conditioning,  o n l y   t h e   a i r   b l o w e r s .   I n   t h e   R E S T   f u n c t i o n ,   t h e   a i r   fl   o w   a n d  distribution  are  controlled  automatically  and  you  c annot modify them.
4 - Adjustment of the air distribution-  Press on button 4  s o   t h a t   t h e   a i r   fl   o w s   s c r o l l   s u c c e s -sively on the display.
5 - Air recirculation
This button activates the recirculation of air within the passenger  compartment  and  also  has  an  automatic function.
The  air  distribution  you  have  chosen  is  con- fi   r m e d    b y    t h e    l i g h t i n g    o f    t h e    c o r r e s p o n d i n g  warning lamps in the display. 
There are 7 possible adjustments.
Entry of air in automatic mode (activated by default, in automatic comfort regulation)
Automatic  mode  makes  use  of  an  air  quality  sensor. This analyses the air and isolates the passenger com-partment  from  the  exterior  as  soon  as  it  detects  the presence of pollutants. Then it automatically activates recirculation of cabin air.
1
Closing of the air inlet
-  Press on button 5 to close off the entry of air from outside.2
Whilst  retaining  the  other  adjustments,  this  position enables  the  driver  at  any  time  to  exclude  any  disa-greeable  odours  or  fumes  coming  from  outside  the vehicle.
It  should  be  cancelled  as  soon  as  possible  to  permit renewal of cabin air and to prevent misting.
-  Press  once  on  button 5  to return  to  the  initial  status (entry of air in automatic mode).
Note  : The  airrecirculation  can  also  be  accessed  by means  of  a  press  on  the  control  located  low  down  to one  side  of  the  steering  wheel  (see  “Fixed  centred controls steering wheel").
Entry of air (manual mode)
-  Press on button 5 to activate entry of air from the outside. The warning lamp goes out. 3 
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6 - Adjustment mode for the rear passengers8 - Deicing / demisting of the rear screen
This can only operate when the engine is running.
-  Press  on  button 8  to  activate/deactivate  the  electric deicing of the rear screen and, according to version, of  the  exterior  rear  view  mirrors.  The  warning  lamp lights up and the symbol appears on the display.
It switches off automatically to prevent excessive con-sumption of power
9 - Rapid deicing / demisting of the front and rear windows
- Press on button 9. The warning lamp lights up.
This  button  decides  whether  or  not  the  rear  passengers may use their adjustment controls.
There are three possible statuses for this button :
Locking of the rear passenger controlsThe  driver  imposes  his  adjustment  on the rear passengers.
Authorisation of the rear passenger controls
The  rear  passengers  can  use  their  adjustment  controls  at  their  conven-ience.
 C l o s i n g   o f   t h e   a i r   fl   o w   f o r   t h e   r e a r  passengers
The supply of air is cut off.
7 - Panel display mode : black panel function
This  function  turns  the  displays  and  panel backlighting on or off.
-  Function activated, a press on any button will light up the screen temporarily.
-  A press on button 7 deactivates the function, lighting of buttons and screen is again permanent.
Note : This function optimises notably the visual com-fort for driving at night.
This  function  gives  a  rapid  deicing  /  demisting of the vehicle simultaneously with :
- front deicing at optimum temperature,
-  o p t i m u m   a i r   fl   o w ,
-  recirculation prohibition,
- deicing  of  the  rear  view  mirrors  and  heated  rear screen,
- air conditioning, if necessary.
Press  again  on  button  9 or  on " AUTO "  to  stop  the function.  Deicing  of  the  rear  view  mirrors  and  heated rear screen remains activated. 
10 - Air conditioning
-  Press on button 10 to activate the air conditioning.
The A/C warning lamp lights up.
With  additional  air  conditioning,  in  cold  weather  you are advised to close the supply of air to the rear pas-sengers  (no  hot  air  distribution  possible  via  these  air vents).   
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AUTOMATIC AIR CONDITIONINGA D D I T I O N A L   A I R   C O N D I T I O N I N GC. REAR PASSENGER CONTROL PANELS  
(RIGHT / LEFT)
1. Adjustment of temperature
The  rear  passengers  can  adjust  their  temperature  controls   independently via buttons + and -.
Note : Their preference cannot be greater than that of the driver by  more  t h a n   2 .   T h e   r e a c h i n g   o f   t h i s   m a x i m u m   p r e f e r e n c e   i s   c o n fi   r m e d   b y   t h  e   fl   a s h -ing of its display.
2. Adjustment of air blower speed
The air blower operates only when the engine is running.
 T o   a d j u s t   t h e   fl   o w   o f   a i r ,   p r e s s   o n   b u t t o n   :
 t o   i n c r e a s e   t h e   a i r   fl   o w
 t o   d e c r e a s e   t h e   a i r   fl   o w
 T h e   l e v e l   o f   a i r   fl   o w   i s   i n d i c a t e d   o n   t h e   d i s p l a y   b y   t h e   p r o g r e s s i v e   fi   l l i n g   o f  the ventilator blades.
 B y   d e c r e a s i n g   t h e   fl   o w   t o   z e r o ,   y o u   d e a c t i v a t e   t h e   a i r   c o n d i t i o  n i n g   s y s t e m  (OFF).
Note  :    y o u    c a n    a d j u s t    t h e    t e m p e r a t u r e    a n d    t h e    a i r    fl   o w    o n l y    i f    t h e    d r i v e r  enables you to (see button 6 of the driver’s control panel).
 T h i s    w a r n i n g    l a m p    s i g n i fi   e s    t h a t  the  passenger  controls  are locked ,    y o u    c a n    a d j u s t    n e i t h e r    t h e    t e m p e r a t u r e    n o r    t h e    a i r    fl   o w ,  which remain aligned on the preferences of the driver.
This warning lamp indicates that the supply of air is cut off.
Additional  air  conditioning  allows you  to  optimise  comfort  levels  in warm  weather  conditions.  It  pro-duces additional fresh air which is supplied  using  the  rear  air  vents. The supply of warm air via the rear air vents is not possible using this system.
This position is recommended in cold weather conditions, as th e air vents do not supply warm air.