Subaru XT 1988 Service Manual page 1024

4-7
AIR CONDITIONING SYSTEM
MECHANISM AND FUNCTION
ELECTRICAL SYSTEM
1) When the mode control switch is set at "A/C. MAX",
"A/C", or "DEF", the air conditioner switch (microswitch)
will be turned on. In this condition, when the blower switch
is turned on, the blower relay and air conditioner relay will
activate. This in turn causes the blower motor, fast idle sole-
noid (FICO) and compressor clutch to activate.
2) In addition, activating the pressure switch (main fan
control) or the thermo switch will cause the main fan to
activate.
3) When either the triple switch or the thermostat acti-
vates, all air conditioner circuits except the blower motor
wilt deactivate. In this condition, however, when the tem-
perature of the coolant in the radiator is high enough and
the thermo switch turns on, the radiator fan (main fan) will
activate.
4) When refrigerant pressure exceeds the specified value with
the A/C switch to ON, the main fan will activate to help cool
the condenser.
5) Electrical system is also used to open or close the mode
selector shutter and internal/external air selector shutter by
utilizing the electrical motor.
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