Refrigerant pressure sensor

The refrigerant pressure sensor is electrically connected to the Body Domain Controller (BDC). The Body Domain Controller (BDC) reads the sensor signals of the refrigerant pressure sensor. The Body Domain Controller (BDC) converts the sensor signals into a message on the local interconnect network bus.

The refrigerant pressure sensor for the heating and air conditioning system is fitted in the high pressure line between the capacitor and the evaporator. When cooling, the refrigerant pressure is monitored by the refrigerant pressure sensor and evaluated in the IHKA control unit.

Depending on the sensor signal, the air conditioning compressor (electrical) is regulated and/or switched off by the IHKA control unit in the event of excessively high refrigerant pressure. Depending on the refrigerant pressure, a fan setting is determined through the IHKA control unit and transferred to the control electronics of the air conditioning compressor via the local interconnect network bus.

The refrigerant pressure sensor is supplied with 5 V and ground by the front Body Domain Controller (BDC).