S 420 (140.043) V8-4.2L (119.981) (1996)
Refrigerant Pressure Sensor / Switch: Description and Operation
The refrigerant pressure sensor serves for measuring the refrigerant pressure.
Switching off the A/C compressor
The refrigerant pressure sensor transfers the current value to the pushbutton control module. When the following values are present the A/C compressor
is switched off by the pushbutton control module:
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Refrigerant pressure < 2 bar = A/C compressor off
-
Refrigerant pressure > 28 bar = A/C compressor off
Switching on the auxiliary fan
The pressure measured by the refrigerant pressure sensor is also compared with a value stored in the pushbutton control module. When the following
values are present the fan is adjusted infinitely:
-
Refrigerant pressure > 16 bar = fan low speed
-
Refrigerant pressure > 20 bar = fan maximum speed