Heating and Air Conditioning: Description and Operation
GENERAL DESCRIPTIONThe heater system uses a two-way-flow full-air-mix system that features high performance and low operating noise. It includes an independent face air blowing function. In addition, an air purifier has been included. GRS is equipped with a heater. GSR is equipped with an air conditioner.
OPERATION
CONDENSER FAN AND RADIATOR FAN CONTROL
For the operation of each fan, refer to GROUP 14 Diagnosis - Symptom Chart
COMPRESSOR CONTROL
A/C Compressor Clutch Relay On Conditions:
When operating the air conditioning switch
- The air thermo sensor, which senses the temperature of the air flowing out of the evaporator, deactivates the compressor at 3.2 °C (37.7 °F) or below.
- The dual pressure switch turns OFF when the refrigerant pressure becomes excessively high or low, thus protecting the compressor circuit.
- When the air thermo sensor is activated, the dual pressure switch is ON, and the ignition switch, blower switch, and air conditioning switch are ON, the A/C compressor clutch relay is energized.
When operating the air outlet selection control knob
- When the air outlet selection control knob is moved to DEFROSTER or DEFROSTER/FOOT position, the defroster switch, which is connected in series to the air conditioning switch, is turned on. Compressor controls other than the above are the same as when operating the air conditioning switch.