Case CX490D Operator's Manual page 72

Crawler excavator
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Automatic:
This button (2) is used for automatic adjustment of the vol-
ume, the direction of flow and starting or stopping of the
air conditioning. AUTO will appear on the display screen
(9). In automatic mode, the only possible manual adjust-
ment is to the temperature (3).
If a control other than the temperature control is operated,
the automatic mode will be cancelled and AUTO will dis-
appear from the display (9). To stop the system, press
buttons (1) or (2).
To obtain hot or cold air quickly:
Cold air: Quit the automatic mode by pressing button (2)
then press button (3) down to the minimum temperature
of 18 °C (64.4 °F). Ventilation will be at maximum and cold
air flow will come from the front.
Hot air: Quit the automatic mode by pressing button (2)
then press button (3A) up to the maximum temperature
of 32 °C (89.6 °F). Ventilation will be at maximum and the
flow of hot air will come from the rear at foot level.
NOTICE: To ensure correct functioning and full effective-
ness of the air conditioning system, it must be run at least
once a week, even if only for a short time.
3 - CONTROLS AND INSTRUMENTS
3-20
10
8TWEZ7-001
11
8TWEZ7-002

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