aircon Citroen C4 2005 2.G User Guide

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ENGINE
B1EP1FUD
B1EP1FVC
AUXILIARY EQUIPMENT DRIVE BELT
Engine: RFJ
Tool.
[1]«Junior» T extension: (-).1608.E
Removing.
Engage tool [1]in the notch «a».
Exert on the roller (1)an effort upwards to hold it at maximum.
Remove the auxiliaries drive belt.
Carefully release the tensioner roller (1)to reach its minimum.
Remove tool[1].
IMPERATIVE: Check that the roller (1) turns freely
(without play and without tight spots).
Refitting.
If removing the auxiliaries drive belt tensioner roller, tighten the screws 2 ± 0,2 m.daN.
Engage tool [1]in the notch at «a».
Exert on the roller (1)an effort upwards to hold it at maximum.
Position the
(new)auxiliaries drive belt, in the following sequence:
- Auxiliaries drive pulley (4), aircon compressor pulley (3), tensioner roller (1)and alternator pulley (2).
IMPERATIVE: Make sure that the auxiliaries drive belt is correctly positioned in the grooves of
the various pulleys.
Release the tensioner roller (1).
Remove tool [1].
Checking the tension of the auxiliaries drive belt.
Check the tension of the auxiliaries drive belt:
- Mark «b»at the level of mark «c», new belt.
- Mark «b»at the level of mark «d», belt to be changed.
C4
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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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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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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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CONDITIONING
445
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table
Principal problem Symptom Possible causes
Low pressure and high pressure too highAircon pressure reducer defective
Duct clogged
Low pressure too high and high pressure too low Aircon compressor seal defective
Aircon evaporator sensor defective
Low pressure too low and high pressure too high Aircon pressure reducer jammed
Abnormal levels of pressuretoo high
Filtering and drying cartridge obstructed
Duct clogged
Duct clogged
Aircon pressure reducer jammed
Low pressure and high pressure too low
Lack of aircon fluid in the aircon circuit
Aircon compressor defective
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