Acura NSX 1991 Manual page 682

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A/C Triple Pressure Switch
Construction
The A/C triple pressure switch consists of a High-Low pressure switch (A/C pressure switch A) and a Middle pressure
switch (A/C pressure switch B).
• High-Low pressure switch
If the refrigerant pressure becomes too high (due to blockage), or too low (due to leakage), the A/C triple pressure
switch sends a signal to the fan control unit to prevent the compressor from operating.
Middle pressure switch
If the refrigerant pressure goes above or below 1 550 kPa (15.5 kg/cm
a signal to the ECM, then the ECM operates the idle control.
Table of Contents
2
, 220 psi), the A/C triple pressure switch sends