CITROEN C6 2005 Owners Manual

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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM
Tightening
Requirements for fitting the inlet and outlet brackets:
- Aircon compressor.
- Aircon condenser.
- Aircon pressure reducer valve.
IMPERATIVE: Assembly requirement: the bracket(s) «f» must be against
their interface(s) before the nut(s) are tightened.
IMPERATIVE: Respect the tightening torques.
C5HP1CWC
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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Pollen filter
The pollen filter is located on the driver's side under the dashboard to the
right of the steering column.IMPERATIVE: Respect the safety and cleanliness requirements.
Removing.
Remove the trim (1)under the dashboard (driver's side).
Release the tab at "b".
Tilt, lift and remove the cover (2).
Remove the pollen filter (3).
NOTE:If the tab "b"is damaged, position a screw for soft materials at "a".
Refitting.
Refit the various components in reverse order to removal.
C5FP0S1CC5HP1BDD
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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Compressor lubricant
ESSENTIAL: The compressor lubricant is extremely hygroscopic; always use FRESH oil.
Checking the compressor oil level
There are three specific cases:
- 1)Repairs to a system without leaks.
- 2)Slow leak.
- 3)Fast leak.
1) Repairing a system without leaks.
a) - Using draining/recovery equipment not fitted with an oil decanter.
- Drain the system as slowly as possible via the LOW PRESSUREvalve, so as not to lose any oil.
- No more oil should be added when filling the system with R 134.afluid.
b) - Using draining/filling equipment fitted with an oil decanter.
- Drain the R 134.afluid from the system in accordance with the instructions in the equipment handbook.
- Measure the amount of oil recovered.
- Add the same amount of NEWoil when filling the system with R 134.afluid.
c) - Replacing a compressor.
- Remove the old compressor, drain it and measure the oil quantity.
- Drain the new compressor (supplied full), so that the same amount of NEWoil is left in the compressor as was in the old compressor.
- No more oil should be added when filling the system with R 134.afluid.
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AIR
CONDITIONING
SPECIAL FEATURES: AIR CONDITIONING SYSTEM (R 134.a)
Checking the compressor oil level (continued)
2) Slow leak.
Slow leaks do not lead to oil loss, therefore the same procedure should be followed as if there was no leak at all.
3) Fast leak.
This type of leak causes both oil loss as well as allowing air to enter the system.
It is therefore necessary to:
- Replace the dryer.
- Drain as much oil as possible (when replacing the faulty component).
Either before or during filling of the system with R 134.afluid, introduce 80 ccof NEWoil into the system.
If changing one of the following components, add as below:
- A drying bottle : 15 ccof compressor oil.
- A condenser or an evaporator : 20 cc of compressor oil.
- A high pressure or low pressure pipe : 5 ccof compressor oil.
- A drying cartridge : 15 ccof compressor oil.
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Equipment: EXXOTest
Tooling (tools and Equipment flash).
Exxoclim : 2.4.2-1.
Method of use: See instructions.
E5AP2N5D
Equipment:VALEO
Tooling.
Clim test 2 : 4372-T.
Method of use: See instructions.
E5AP2N4D
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CONDITIONING
210
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Testing procedure.
Checking.
Position the equipment - Exxoclimor Clim test 2- (see instructions).
Preliminary operations.
Close all the front air vents.
Start the engine.
Open the front air vent.
Activate the «air conditioning»control.
Position the air distribution control to «frontal flow».
Activate the «air recirculation»control.
Positions of the air conditioning controls:
- Temperature control on maximum cold (LHand RH).
- Blower control in maximum speed position.
Let the air conditioning operate for 5 minutes.
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Reminder (for information)
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 Origins Solutions
SR < 2°C Lack of aircon fluid in the aircon condenser
Add some aircon fluid
2°C < SR <4°CLack of aircon fluid in the aircon condenser
4°C < SR < 10°C/12°CCorrect quantity
SR > 10°C/12°C
Excess aircon fluid in the aircon condenser Remove some aircon fluid
SR > 15°C
Over-heating.
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 Origins Solutions
2° < SC < 15°CCorrect quantity
SC > 15°CLack of aircon fluid in the cooling circuit Add some aircon fluid
SC < 2°CExcess aircon fluid in the cooling circuit Remove some aircon fluid
Blown air temperature.
The blown air temperature should be between 2°Cand 10°C.
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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table (for information)
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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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table (for information)
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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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table (for information)
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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