Komatsu PC118MR-8 Operation And Maintenance Manual page 182

AIR CONDITIONER
3. Press the air source selector (6) and set to "fresh air"
mode.
4. Press the temperature control button (3) until the
'maximum heating' setting is displayed on the monitor (7).
5. Adjust the vents (A), (B1) and (B2) so that the air is
directed towards the windscreen.
(vents C and D are fixed and cannot be adjusted).
In the event of rain or to demist the screen or dehumidify the
air, switch on the air conditioner with the relative button (8).
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WEAM014802
FUNCTIONING