Checking The Efficiency Of The Air Conditioning System - CITROEN C5 Handbook

CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM

TOOLS
Two thermometers.
Preliminary conditions.
Position of the air conditioning controls :
- Maximum cold air.
- Air blower in maximum position.
- Air distributor in "ventilation" position, with the dashboard vents open.
- Air intake flap in "exterior air" position.
Conditions and vehicle equipment.
- Bonnet closed.
- Doors and windows shut.
- Ensure the vehicle is in a sheltered area (away from wind, sun, etc..).
CHECKING TEMPERATURES.
CHECKS.
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.
- Operate the air conditioning and set the engine speed to 2500 rpm.
NOTE : If the exterior temperature reaches 40 °C, the engine speed will
return to 2000 rpm in order to prevent the compressor from being cut off
by the High Pressure safety device (Pressostat).
After the air conditioning has been on for three minutes, measure :
- the exterior temperature in the workshop,
- the temperature of the air coming out of the central vents.
Compare the two values using the table overleaf.
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