Control System Description Manual A/C (Type 1)

MANUAL AIR CONDITIONER SYSTEM


Control System Description


CONTROL OPERATION
Front air control






TEMPERATURE CONTROL DIAL (TEMPERATURE CONTROL)
Increases or decreases the set temperature.





RECIRCULATION ( ) SWITCH
- When REC switch is ON, REC switch indicator turns ON, and air inlet is set to REC.
- When REC switch is turned OFF, or when compressor is turned from ON to OFF, REC switch is automatically turned OFF. REC mode can be re-entered by pressing REC switch again.
- REC switch is not operated when DEF switch is turned ON, or at the D/F or FOOT position.





DEFROSTER ( ) SWITCH
Positions the air outlet doors to the defrost position. Also positions the intake doors to the outside air position.

REAR WINDOW DEFOGGER SWITCH
When switch is ON, rear window is defogged.

OFF SWITCH (BLOWER SPEED DIAL)
The compressor and blower are OFF.

A/C SWITCH
The compressor is ON or OFF.
(Pressing the A/C switch will turn off the A/C switch and compressor.)

MODE SWITCHES
Controls the air discharge outlets.

FRONT BLOWER CONTROL DIAL
Manually controls the blower speed.

MAGNET CLUTCH CONTROL





When the A/C switch is pressed, or the mode switch is pressed to the DEF or D/F position, the front air control outputs a compressor ON signal to BCM.
The BCM then sends a compressor ON signal to ECM, via CAN communication line.
ECM judges whether compressor can be turned ON, based on each sensor status (refrigerant pressure sensor signal, throttle angle sensor, etc.). If it judges compressor can be turned ON, it sends compressor ON signal to IPDM E/R, via CAN communication line.
Upon receipt of compressor ON signal from ECM, IPDM E/R turns air conditioner relay ON to operate compressor.