Air Flow, Time Check, Vacuum

CHECKING AIR FLOW
In most programmed positions warm air is released from the floor and defroster vents, whereas cold air flows out of the panel vents and steering column vent.








Manually Controlled Positions: Bi-Level
Air flows from panel and floor vents. Small amount of air from defroster vents. AC compressor operating.








Manually Controlled Positions: Defroster
Max, fan speed. Air flows from defroster vents. Small amount of air from floor vents. AC compressor operating.

NOTE: When carrying out the following checks, make sure that full supply voltage 12V and that there is sufficient vacuum in the system. If necessary, use a separate vacuum pump. The vacuum should be 35 kPa (4.9 psi). The vacuum in the system can be checked by measuring the time it takes for the shutter to travel from one limit position to the other. Temperature should be approx. 20-25°C (68-77°F).

Time Check From Cold To Warm, Function Selector In AUTO Position:
- Move the temperature selector from max cooling to max heating 65-85°C (149-185°F). Time taken for warm air to be emitted: approx. 10 seconds.

- Move the temperature wheel from max heating to max cooling. Time of travel:
- with air recirculation at room temp. above 20°C (68°F). approx. 25 seconds
- without air recirculation at room temp. below 20°C (68°F). approx. 16 seconds.

Approximate Time Taken For Vacuum Control:
- Temperature selector set at Max cool 18°C (65°F).
- Symbol ** indicates source of released air.
- Function selector moved from the OFF position to:
- ECON **Panel vent 10-12 seconds
- B/L **Floor & panel vents 5-8 seconds
- DEF **Defroster vents 3-6 seconds
- AUTO (without air recir.) **Panel vents 15-20 seconds
- AUTO (with air recir. above 20°C (68°F) room temp) **Panel vents 15-20 seconds

Formula For Converting Fahrenheit To Centigrade: °C = 5/9.(°F - 32)