Komatsu PC308USLC-3E0 Operation & Maintenance Manual page 114

OPERATION
DETAILED CONTROLS AND GAUGES
Defroster Selector Lever
Switch (7) is used to remove the mist from the front glass during
cold or rainy weather.
(A): To defroster (open)
(B): Closed
The defroster can be used when the vent selector switch is set
to send air to the face or to the face and the feet.
Auto Air Conditioner Switch
This switch (8) is used to automatically maintain the air
temperature set by temperature control switch (3).
Sunlight Sensor
This sensor (9) automatically adjusts the flow of air from the vents
to match the strength of the sun's rays. In addition, it automatically
detects changes in the temperature inside the cab caused by
changes in the strength of the sun's rays beforehand and
automatically adjusts the temperature.
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