Climate Control Panel Operation
Climate Control Panel Operation
Climate Control Panel:
The following description of the various control panel functions is provided as a brief over-view to assist in function checking. Further information concerning the control panel to component interface may be found in the fault finding procedures (this section) or the Electronic Diagnostic Manual (EDM).
NOTE: The system may be activated by any one of four commands. a) AUTO button item 11; b) DEFROST button item 12; c) A/C button item 10; d) OFF switch item 1.
1. Combined push for OFF and rotary FAN SPEED control. The speed of the two fans is changed by clockwise (to increase) or anticlockwise rotation of the knob. Operation of the control, (push) OFF or (rotate) FAN over-rides the AUTO selection and cancels the 'AUTO' display.
2. RECIRCULATE AIR push-on/push-off button and state lamp, used to prevent outside air being drawn into the cabin. There are two modes:
a) Press and immediate release; provides timed recirculation of five (5) minutes.
b) Press and hold for two (2) seconds; 'latches' the mode until operator over-ride.
3. Temperature scale SELECTOR for Celsius or Fahrenheit.
4. FANS SPEED display bar graph.
5. TEMPERATURE numeric display for demand and exterior.
6. Selected temperature SCALE temperature numeric display.
7. EXTERIOR temperature option display.
8. AUTO selection display.
9. EXTERIOR temperature selection button. There are two modes:
a) Press and immediate release; provides timed display of four (4) seconds.
b) Press and hold for two (2) seconds; 'latches' the mode until operator over-ride.
10. A/C push-on/push-off button will either engage or disengage (as indicated by the state lamp) the refrigeration system compressor. The state lamp is also used as a compressor speed fault indicator, see System protection. Description and Operation
11. AUTO push-on button and state lamp. When selected and the state lamp lit, the A/C mode is selected and control of demand temperature, fans speed, and air distribution is automatic. AUTO is cancelled by selection of any 'distribution' button, A/C off, or manual FANS SPEED.
12. DEFROST push-on/push-off button and state lamp. When engaged, air is distributed to the screen at maximum fans speed and the heated front screen elements (where fitted) are energized. The heated front screen is automatically timed for a six (6) minute cycle but may be cancelled by pressing the HEATED FRONT SCREEN button. Automatic temperature control is retained and the fans speed may be manually reduced. Deselection will return the system to the previous state and selection of AUTO will resume automatic system control.
13. The push-on/push-off (F) button with state lamp manually controls the HEATED FRONT SCREEN (where fitted). This facility allows rapid screen de-icing using laminated electrical heating elements to supplement the hot air defrost.
14. The push-on/push-off (R) button with state lamp manually controls the HEATED REAR SCREEN and door mirror glass heating elements for a timed cycle of; screen twenty (20) minutes and mirrors eleven (11) minutes.
NOTE: The state lamp will remain lit after the mirror timer has gone through its 11 minute cycle and will not go out until either completion of the 20 minute screen cycle or manual override.
15. TEMPERATURE decrease button in 1°C or 1°F steps.
16. TEMPERATURE increase button in 1°C or 1°F steps.
NOTE: Automatic temperature control operates over the range 17°C to 31°C (61°F to 90°F). Extreme limits selected by items 15 and 16 ('Lo' and 'Hi') provide maximum cooling or heating at maximum fans speed.
17. FACE level manual distribution over-ride push-on/push-off button and state lamp.
18. Bi LEVEL (foot and face) manual distribution over-ride push-on/push-off button and state lamp.
19. FOOT level manual distribution over-ride push-on/push-off button and state lamp.
20. DEMIST (screen and foot) level manual distribution over-ride push-on/push-off button and state lamp.
NOTE: Selection of AUTO will over-ride any manual setting and deselection of any manual distribution will revert the system to AUTO distribution.
21. FACE VENT TEMPERATURE CONTROL thumb-wheel. Situated between dash centre face level vents to reduce face air outlet temperature relative to that of the foot-well.