Komatsu PC290LC-6K Operation & Maintenance Manual page 77

Hydraulic excavator
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6.
Defroster selector lever
This lever is used to remove condensation or ice from the lower part of
front window during winter or rainy season.
Selector lever forward: defrost
Selector lever backwards: warms operator's feet
Defroster is available when air outlet slider is in the position shown by
decal:
Defroster
Feet
11.12.2 PRECAUTION WHEN USING AIR
CONDITIONER
During cooling, ventilate the air from time to time.
If operator is smoking during cooling, eyes may occasionally smart. In
this case, temporarily change the switch to ventilation/cooling to ex-
haust the smoke.
When cooling for a long time period, select ventilation/cooling once an
hour.
Avoiding excessive cooling.
If the operator feels somewhat cool when entering a cooled cab, the
temperature (temperature difference between external temperature is
o
o
o
o
5
to 6
C(9
F to 11
Adjust the cooling temperature carefully.
F)) is at the optimum lever from a health viewpoint.
11. EXPLANATION OF COMPONENTS
2-33

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