52287
52288
Figure 10
Figure 11
The three-level pressure switch is mounted on the pipe
connecting the drier filter to the expansion valves. It has the
task of operating the electric fan for the condenser and
radiator when the vehicle is stationary or running at low
speed, so there is no air stream caused by the forward motion
of the vehicle, and it is therefore necessary to activate
refrigerant condensation by forced ventilation.
In addition, it has the task of
disconnecting the
electromagnetic coupling of the compressor pulley when the
pressure of the fluid (high pressure side), in spite of the action
of the condenser and radiator fan, reaches dangerous limits
or when the heating load conditions are not sufficient to
make the refrigerant evaporate.
This is mounted on the left-hand external rear-view mirror
in the position shown in the figure.
The system is equipped with specific devices that, by checking
the pressure and temperature, make it possible to protect the
system from possible trouble and provide optimal operation.
553235
Three-level pressure switch
553242
Outside air temperature sensor
Description
10
CAB AIR-CONDITIONING
D
AILY
CONTROL AND SAFETY DEVICES