Refrigerant Pressure Sensor / Switch: Description and Operation

Pressure (Bitron) switch
Located in the discharge pipe.

Provides a signal, via the A/CCM, to the ECM, to disengage the compressor clutch should the refrigerant pressure be <2 bar or >30 bar.

Provides a hard-wired signal to the ECM, to switch the cooling fans to HIGH speed at 22 bar rising pressure and to LOW speed at 17,5 bar falling pressure.

Provides a hard-wired signal to the ECM, to switch the radiator cooling fans to LOW speed at 12 bar rising pressure and to switch the fans OFF at 8 bar falling pressure.