Komatsu PC138USLC Operation & Maintenance Manual page 152

OPERATION OPERATION
3. Press temperature setting switch (3) and adjust temperature
inside the cab.
4. Press vent selector switch (4) and select the desired vents.
When this is done, the display for vent (c) of the display monitor
changes according to the selection.
5. Press RECIRC/FRESH selector switch (6) and select
recirculation of the air inside the cab (RECIRC) or intake of
fresh air from outside (FRESH).
DETAILED CONTROLS AND GAUGES DETAILED CONTROLS AND GAUGES
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