Compressor Control System - Subaru LEGACY 2002 Quick Reference Index

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COMPRESSOR CONTROL SYSTEM

HVAC System (Heater, Ventilator and A/C)

17.Compressor Control System

1) When the A/C switch and fan switch are turned ON, the A/C relay is activated. The compressor

starts operating, and then the main and sub fans also operate.

2) The thermo control amplifier, when activated, disengages the compressor clutch and the main

and sub fans.

3) When the pressure switch turns on, the compressor clutch is disengaged and the main and

sub fans also stop.

B: THERMO CONTROL AMPLIFIER

The thermo control amplifier disconnects the magnet clutch circuit to prevent the evaporator from

becoming frosted when the temperature of the evaporator fin drops close to 3°C (37°F). When the

limit temperature is reached, the thermistor (located on the evaporator fin) interrupts the base cur-

rent of the amplifier. This deactivates the A/C relay, which in turn disconnects the magnet clutch

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