Komatsu PC290LC-6K Operation & Maintenance Manual page 76

11. EXPLANATION OF COMPONENTS
2. Outlet air distribution slider.
Outlet air can be distributed through various vents in the operators cab.
Purpose
Sending air to lower area of
operator's seat and defrosting
lower part of front window.
Lever
position
Air outlets
For complete defrosting of the front window, set the slider to the mid-point of its stroke.
3. Inlet air control slider
Changes between internal air recirculation & external fresh air intake.
Internal air circulation.
This is used when wishing to
Purpose
quickly cool or warm the cab.
Lever
position.
4. AIR FLOW SELECTOR SWITCH.
This switch adjust air flow in three steps.
5. AIR CONDITIONER ON/OFF
This switch functions as an ON / OFF switch for the air con-
ditioner system.
Notice
The fan selector switch
or 3 before air condition can be operated.
2-32
Sending air to upper area
of operator's seat and defrosting
upper part of front window.
External air intake.
This is used for fresh air
intake or to remove
condensation or ice on
windows or when the air
inside the cab is stale.
must be selected to position 1,2