Hitachi ZX27U-2, Operator'S Manual

Page: 64 / 230

OPERATOR’S STATION
1-14
TIPS FOR AIR CONDITIONER USAGE
Rapid Cooling
Temperature in the cab may rise over 80
°
C when the
machine is exposed to direct sunlight with the cab win-
dows closed. Under this condition, in case temperature
in the cab is required to be rapidly cooled, ventilate air
from the cab first by opening the windows. After starting
the engine, set the temperature control toward the far left
end using temperature control switch (8). Select the right
front vent mode. Run the blower at the slow speed posi-
tion. Turn air conditioner switch (6) ON. After keep the
engine running at slightly faster speed (over 1000
min
-1
[rpm]) for a few minutes, increase the blower speed.
When the air temperature in the cab is decreased to the
atmosphere temperature, close the windows.
If Windows Become Clouded
The windows will become cloudy if the humidity in the
cab become high. Operate the air conditioner to keep the
windows clear. When the atmosphere is very damp, the
outside of the windows may become clouded if the air
conditioner is operated for long periods. In this case,
stop the air conditioner and/or adjust the air temperature
in the cab.
When the air conditioner is not used
When the air conditioner is not used, to protect each part
of the compressor from a lack of lubricant, operate the
air conditioner at least once a month for several minutes
with the engine running at a slow speed. When the cab
temperature is lower than 15
°
C (59
°
F), the air condi-
tioner may not operate. In this case, warm the cab inside
using the heater first to increase the cab temperature.
IMPORTANT:
•
Do not suddenly increase the engine speed,
failure to do so possibly result in damage to the
compressor.
•
Keep fire hazards away from the control panel.
•
Refer to the descriptions in Clean/Replace Air
Conditioner Filter in the Maintenance Section
for the maintenance of the air conditioner fil-
ters.
M1M7-01-039
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