220
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.
- Boot closed.
- Doors and windows shut.
- Ensure the vehicle is in a sheltered area (away from wind, sun, etc.).
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 ambient 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 ambient temperature in the workshop,
- the temperature of the air coming from the central vents.
Compare the two values using the table on the following page.
CHECKING TEMPERATURES
AIR
CONDITIONING
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