REFRIGERANT PRESSURE SWITCH CONSTRUCTION [MANUAL AIR CONDITIONER]

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• 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. 1.52 MPa {15.5 kgf/cm2, 221 psi} or more, the contact turns on, and a cooling fan control signal is sent to the PCM.

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Hi and Lo-pressure Switch

• When refrigerant pressure is abnormal, the refrigerant pressure switch turns off and cuts the signal sends to the magnetic clutch, thereby stopping the A/C compressor.

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