2005 Citroen XSARA PICASSO temperature

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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Pollen filter
XSARA
Removing-refitting.
Remove:
- The interior trim (1).
- The cover (4).
- The pollen filter (3).
Concerns vehicles equipped with aircon without temperature regulation.
Fitting of a new pollen filter necessitates the following operations:
- Engage the pollen filter upwards
(following arrow «c»).- Slide the pollen filter towards the rear (following arrow «d»).- Position the index(4)on the cover forward of the pollen filter ((4)Index on
the cover).
C5HP07JC
C5FP075D
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CONDITIONING
437
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Outillage EXXOTest
Outillage
(flash équipement & matériel).Exxoclim : 2.4.2-1
Mode d’emploi : Voir notice constructeur
Procédure de l’essai.
Contrôle.
Mettre en place l'outillage
(selon notice du constructeur).
Opérations préliminaires.
Fermer tous les aérateurs frontaux.
Démarrer le moteur.
Ouvrir l'aérateur frontal gauche.
Positionner la commande du répartiteur d'air sur«débit frontal».
Activer la commande«recirculation d'air».
Activer la commande"AIR
CONDITIONING ".
Position des commandes de AIR
CONDITIONING :
- Commande de température sur froid maxi.
- Commande de pulseur en position vitesse maximum.
Laisser la AIR
E5AP2N5D
Outillage VALEO
Outillage.
Clim test 2 : 4372-T
E5AP2N4D
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Checking.
Position the toolCLIM TEST II
(according to the manufacturer's instructions).
Preliminary operations.
Close all the front air vents.
Start the engine.
Open the front LH air vent.
Position the air distribution control to«frontal flow».
Activate the«air recirculation» control.
Activate the«air conditioning» control.
Positions of the air conditioning controls:
- Temperature control on maximum cold.
- Blower control in maximum speed position.
Let the air conditioning operate for5 minutes.
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
E5AP2FAC
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Interpretation of the measurements.
«m»:High pressure.«s»:Over-heating (SC).
«n»:High temperature.«t»:Ambient air temperature.
«p»:Under-cooling (SR).«u»:Blown air temperature.
«q»:Low pressure.«v»: Humidity.
«r»:Low temperature.«w»: Temperature T3.
Under-cooling.
The under-cooling represents the difference between the condensation temperature and the aircon
fluid temperature at the aircon condenser outlet.
The under-cooling gives the quantity of aircon fluid
(in the liquid state)in the air conditioning circuit.
Values for under-cooling (SR).
Values «p» Origins Solutions
SR < 2°CLack of aircon fluid in the aircon condenser
(should be more than 150grammes)
Add some
2°C < SR <4°CLack of aircon fluid in the aircon condenser aircon fluid
(should be around 100to 150grammes)
4°C < SR < 10°C/12°CCorrect quantity
SR > 10°C/12°CRemove some
Excess aircon fluid in the aircon condenser aircon fluid
SR > 15°C
Blown air temperature «u».
The blown air temperature should be between 2°Cand 10°C.
E5AP2FBC
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Interpretation of the measurements.
«m»:High pressure.«s»: Over-heating (SC).
«n»:High temperature.«t»:Ambient air temperature.
«p»:Under-cooling (SR).«u»:Blown air temperature.
«q»:Low pressure.«v»:Humidity.
«r»: Low temperature.«w»: Temperature T3.
Over-heating (SC).
The over-heating represents the difference between the aircon fluid temperature at the evaporator outlet
and the evaporation temperature.
The over-heating gives the quantity of aircon fluid (in the liquid state) in the air conditioning circuit
Values for over-heating (SC).
Values «s» Origins Solutions
2° < SC < 15°CCorrect quantity
SC > 15°CLack of aircon fluid in the cooling circuitAdd some
aircon fluid
SC < 2°CExcess aircon fluid in the cooling circuitRemove some
aircon fluid
Blown air temperature «u».
The blown air temperature should be between 2°Cand 10°C.
E5AP2FBC
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table
Principal problem Symptom Possible causes
Low pressure normal and high pressure too high Presence of air in the aircon circuit
Low pressure normal and high pressure too lowAircon pressostat defective
Evaporator sensor defective
Abnormal levels of pressure Low pressure too high and high pressure normal Aircon pressure reducer jammed open
Filtering and drying cartridge saturated or
Low pressure too low and high pressure normal clogged
Aircon pressure reducer iced up
Under cooling too weak Lack of aircon fluid
Air conditioning operating inExcess aircon fluid
back-up mode
Under cooling excessive Presence of air in the aircon circuit
Filtering and drying cartridge clogged
NOTE: In all cases, measure the excessive heating (SC)and the blow air temperature.
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