CONTROL PANEL
The automatic A/C-heater system control panel permits manual operation of system by placing blower control knob or function selector knob in any position other than AUT (automatic). see scheme 1
Blower fan may be automatically controlled by placing control knob in AUT position. Fan speed can also be manually controlled by placing control knob in any position except AUT or 0 (off) position.
Function selector knob may be placed in defrost, vent, AUT, bi-level, or floor position. In AUT position, air distribution is automatically regulated. Air distribution may also be to floor, windshield and side windows.
Temperature control knob may be used to select desired temperature. The recirculated air button may be pressed to recirculate passenger compartment air. This function, however, will not work in defrost position. Pressing A/C OFF button will turn automatic A/C system off.
Note. Operational description of other components is not available. (Scheme 5)
Scheme 5
A/C SYSTEM PERFORMANCE
- Close hood and front doors. Operate engine at 2000 RPM. Turn blower on third speed. Set temperature knob to cool setting. Select panel vent position on airflow mode control knob. Select recirculated air (button pressed).
- Open panel vents. Turn on A/C. After 8 minutes, ensure compressor cycles on and off. Place thermometer in center vent. Ensure duct temperature is 41-46°F (5-8°C) when ambient temperature is 68-86°F (20-30°C), or 46-54°F (8-12°C) when ambient temperature is 104°F (40°C).
VACUUM CIRCUITS
Using vacuum schematic and vacuum functions table, test for proper operation of vacuum circuits. (Scheme 6)
