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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/cm 2, 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