222
14.5 ± 2 17.6 ± 2 20 ± 2 21.4 ± 2 23.6 ± 2 25.2 ± 2
2.4 ± 0.2 2.5 ± 0.2 2.8 ± 0.2 3 ± .02 3.5 ± .02
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
CHECKING PRESSURES
TOOLS - 1 Charging station.
- 2 Thermometers.
Once the preliminary conditions, vehicle equipment and checks have
been fulfilled (see table) : After the air conditioning has been on for three
minutes, record the following parameters :
CHECK
- The temperature of the air coming from the central vents (see table).
- The High Pressure.
- The Low Pressure.
Compare the values recorded with the table below, or the graphs.
Ambient temperature in °C
40 35 30 25 20 15
Vehicle
Engine types
C3 All types
High pressure (Bars)
Low pressure (Bars)
Vehicle using R134.a fluid (Compressor with variable capacity)
Note : For vehicles with RFTA (1), disconnect the connector of the air inlet motor, ensuring that it is in the outside air position.
Reminder: The above results are expressed in absolute bars. If using equipment for measuring relative pressure
(e.g. manifold), the value can be increased in order to bring it up to absolute bars.
(1) RFTA = Fully automatic air conditioning.
AIR
CONDITIONING
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