Compressor Clutch: Description and Operation

A/C Schematic, Wagon:

The general process to energize the magnetic clutch is shown below
1. Ignition Switch "ON"
2. Blower Switch "ON"---> Heater Relay "ON" (Blower Motor "RUN")
3. A/C Switch "ON"---> A/C Amplifier "ON" (A/C Amp. Main Power Supply)
4. Dual Pressure Switch "ON" (Refrigerant pressure greater than 30 psi (206 kPa, 2.1 kg/cm2) and less than 384 psi (2648 kPa, 27 kg/cm2)
5. Thermistor supplies temperature of evaporator to A/C amplifier.
6. VSV "ON"---> Engine Idle Up
7. Magnetic Clutch "ON"