Komatsu D475A-5E0 Operation & Maintenance Manual page 125

EXPLANATION OF COMPONENTS
RECIRC/FRESH Selector Switch
Switch (6) is used to switch the air source between recirculation of
the air inside the cab and intake of fresh air from the outside.
When switch (6) is pressed, the lamp above the selector switch
lights up to show that air is being blown out.
During automatic operation, the selection of inside air (RECIRC)
and outside air (FRESH) is performed automatically.
Outside air is shut off and only air inside the cab is circulated.
RECIRC
Use this setting to perform rapid cooling of the cab or when outside air is dirty.
Outside air is taken into the cab.
FRESH
Use this setting to take in fresh air when performing demisting.
Display Monitor
Monitor (7) displays the state of temperature setting (a), air flow (b),
and vents (c).
When OFF switch (1) is pressed, the display of temperature
setting (a) and air flow (b) goes out, and operation stops.
Air Conditioner Switch
Switch (8) is used to turn the air conditioner (cooling,
dehumidifying, heating) ON or OFF.
When the fan is actuated (display (b) is shown) and air
conditioner switch (8) is pressed, the air conditioner is switched
ON, lamp above the air conditioner switch lights up, and the air
conditioner starts.
When switch (8) is pressed again, the air conditioner is switched
OFF, lamp above the air conditioner switch goes out, and the air
conditioner stops.
Air conditioner cannot be operated while the fan is off.
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OPERATION