REFRIGERANT PRESSURE SWITCH CONSTRUCTION


BHE074061480T09

• A triple-pressure type has been adopted.

• The refrigerant pressure switch is composed of the high-pressure and low-pressure switches, which cut the A/C signal to protect the refrigeration cycle if pressure in the refrigeration cycle is too high or too low; and the medium-pressure switch, which sends an cooling fan control signal according to the operation load of the cooling fan.

Medium-pressure Switch

• When refrigerant pressure reaches approx. 1.44 MPa {14.7 kgf/cm2, 209 psi} or more, the contact turns on, and a cooling fan control signal is sent to the PCM.

• When the PCM receives a cooling fan control signal while the A/C is on, it sends an operation signal to the cooling fan relay.

1
Refrigerant pressure switch
2
Operating pressure
3
Cooling fan control
4
Medium pressure switch