Citroen BERLINGO 2005 1.G Workshop Manual

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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Changing the filtering/drying cartridge
Tools.
[1]Charge station:
(according to workshop equipment)[2]TORX adaptor: TORX 70 FACOM
Removing.
Depressurise the aircon circuit, using tool [1].
Uncouple the hose (2).
Remove:
- The air filter assembly (3).
- The nuts (1).
Protect the radiator harness with strong cardboard cut to the dimensions of the radiator.
Move aside the cooling fan.
Remove:
- The screws (4).
- The brackets (5).
B1BP23FCB1BP23GC
XSARA PICASSO
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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Changing the filtering/drying cartridge
Move aside the radiator/condenser assembly.
Remove the plug (6), using tool [2].
Support the radiator/condenser assembly thus moved aside.
Remove the filtering/drying cartridge (7), using pliers.
Refitting.
Refit the filtering/drying cartridge (7).
Clean the threads of the plug (6).
It is essntial to change the O-ring seals (8).
Lubricate the O-ring seals (8)with aircon compressor oil.
Refit:
- The plug (6), using tool [2], tighten to 1,4 ± 0,2 m.daN.
- The brackets (5).
- The screws (4).
- The cardboard from the radiator harness.
- The nuts (1).
- The air filter assembly (3).
Couple the hose (2).
Recharge the circuit (R134.a)
(according to equipment) (see corresponding
operation).
Check the operation of the air conditioning.
C5HP14NCC5HP14PCC5HP14QC
XSARA PICASSO
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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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CONDITIONING
438
Tools.
[1] Clim test 2 VALEO: 4372-T
Checks.
Position the tool [1]
(depending on manufacturer's instructions).
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
E5AP2ECC
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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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CONDITIONING
442
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Interpretation of the diagnosis
«x»Check satisfactory
«y»Lack of aircon fluid in the aircon circuit
«z» Excess aircon fluid in the aircon circuit
«aa» Filtering and drying cartridge clogged
«ab»Other problems
(see table on previous page)
E5AP2FCD
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CONDITIONING
443
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table
Principal problem Symptom Possible causes
Aircon compressor clutch
Lack of aircon fluid in the aircon circuit
The clutch of the aircon compressor does not Aircon pressostat
engage, or disengages suddenly Aircon evaporator sensor
The aircon compressor does not turn Electrical circuit
(wiring, fuses, etc.)
or stops suddenly
Auxiliaries drive belt
Aircon compressor
The clutch of the aircon compressor remains Filtering and drying cartridge
engaged and stops suddenly
Aircon pressure reducer
Leak of aircon fluid
Aircon compressor clutch
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CONDITIONING
444
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table
Principal problem Symptom Possible causes
Incorrect adjustment of the aircon compressor
clutch
The clutch of the aircon compressor Aircon fluid quantity
remains engaged
Aircon compressor defective
The aircon compressor makes an abnormal Lack of aircon fluid in the aircon circuit
noiseAircon compressor valves defective
The clutch of the aircon compressor Aircon compressor clutch
remains engaged and slips
Auxiliaries drive belt
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