900 L4-1985cc 2.0L DOHC Turbo EFI (1985)
Auxiliary Blower Motor: Description and Operation
OPERATION
NOTE: This section does not cover the 1986 models for markets in which the unit is equipped with a time delay relay, such as the U.S.A. market. For
particulars of this unit, see the section entitled Air Conditioner (AC) - 1986 models with time delay relay.
Compressor And Radiator Fan Motor 37
The AC can be switched on and off by means of AC switch 169, which is supplied from fuse 6, via the 29-pole black connector 152C. When the switch
is depressed, the lamp built into the button will be supplied directly (not via the resistor), so it will light up with full intensity. (The pin numbers in
parentheses refer to the 1985 models.)
Compressor 170 and ordinary radiator fan 37 are connected via relay 156, which is supplied from fuse 25. The relay will be energised when the
following conditions are satisfied:
-
Pressure switch 166 is closed, i.e. the refrigerant pressure is at least 2.8 bar.
-
Anti-freeze thermostat (cycling clutch contact) 171 is closed, i.e. the ambient temperature is at least about +6 °C.
-
Throttle switch 167 is closed, i.e. the butterfly valve is not open more than 7O° (if the jumper is cut).
-
Temperature switch 168 is closed. (The switch will open if the engine temperature exceeds around +115 °C.)
Diode 173, which is connected in parallel with the compressor, reduces the voltage transients at the instant when the compressor is switched off.
