Get Air Conditioning -> Checking Efficiency Guide for Citroen Xsara SUV Second Generation (1997-2006)

SPECIAL FEATURES : AIR CONDITIONING SYSTEM (R 134.a)

XSARA PICASSO

BEHR condenser with integral reservoir (16 Ti)

The condenser is equpped with a cylinder (1) that acts as the fluid reservoir which

in turn incorporates a filter cartridge.

NOTE : As soon as the air conditioning loop has been open for more than 5 minutes,

the filter/dryer cartridge assembly should be replaced (no set interval).

Instruction for replacing the filter/dryer cartridge.

- After undoing the cap (TORX 70), the cold loop must be depressurised.

- Unscrew the cap and clean the cap's thread.

- Take out the filter/dryer cartridge.

- Clean the threaded zone of the condenser reservoir.

- Fit the new filter/dryer cartridge.

- Lubricate the cap's O-ring seals with compresser oil.(New seals).

- Screw the cap back on, tighten to 1.4 ± 0.2 m.daN.

C5HP07BC

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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 PRESSURE valve, so as not to lose any oil.

- No more oil should be added when filling the system with R 134.a fluid.

b) Using draining/filling equipment fitted with an oil decanter.

- Drain the R 134.a fluid from the system in accordance with the instructions in the equipment handbook.

- Measure the amount of oil recovered.

- Add the same amount of NEW oil when filling the system with R 134.a fluid.

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 NEW oil is left in the compressor as was in the old compressor.

- No more oil should be added when filling the system with R 134.a fluid.

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SPECIAL FEATURES : AIR CONDITIONING SYSTEM (R 134.a)

ALL TYPES

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 dehydrator.

- Drain as much oil as possible (when replacing the faulty component).

Either before or during filling of the system with R 134.a fluid, introduce 80 cc of NEW oil into the system.

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CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM

CHECKING TEMPERATURES

TOOLS

Checks

Two thermometers

If all these conditions are met, take the following action :

- Start the engine, with the air conditioning off, and wait for the cooling fan

first speed to cut in.

Preliminary conditions.

- Operate the air conditioning and set the engine speed to 2500 rpm.

Position of the air conditioning controls :

- Maximum cold air.

- Air blower in maximum position.

NOTE : If the ambient temperature reaches 40 °C, the engine speed will

return to 2000 rpm in order to prevent the compressor from being cut off

- Air distributor in "ventilation" position, with the dashboard vents open.

- Air intake flap in "exterior air" position.

by the High Pressure safety device (Pressostat).

After the air conditioning has been on for three minutes, measure :

- the ambient temperature in the workshop,

- the temperature of the air coming from the central vents.

Conditions and vehicle equipment.

- Boot closed.

Compare the two values using the table overleaf.

- Doors and windows shut.

- Ensure the vehicle is in a sheltered area (away from wind, sun, etc..).

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Air Conditioning -> Checking Efficiency for Your Citroen Xsara SUV Second Generation (1997-2006)

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