REFRIGERANT PRESSURE SWITCH CONSTRUCTION
B3E074061480T05
• A triple pressure type has been adopted.
• Consists of the low/high-pressure switch that protects the refrigerant cycle by cutting the A/C signal when pressure in the refrigerant cycle is abnormally high or low, and the medium-pressure switch that outputs an idling increase signal according to the A/C compressor operation load.
Medium-pressure switch
• When the refrigerant pressure is approx. 1.39 kPa {14.2 kgf·cm2, 202 psi} or more, the contact is energized and an idling increases signal is output to the PCM.
• When the A/C is on and an idling increase signal is input to the PCM, it sends an operation signal to the IAC solenoid valve.
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1
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Refrigerant pressure switch
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2
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Operation pressure
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3
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Idling increase signal
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4
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Medium-pressure switch
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