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System Functions
Safety, Operation and Maintenance Manual - Aug 2012
3-62
SY115C9/135C/155H Crawler Hydraulic Excavator
(5) Automatic control switch
This switch (5) can be used to set air
fl
ow, out-
lets and fresh air or circulation automatically
according to the preset temperature.
●
Pressing the automatic control switch (5),
the indicator above the switch comes on.
●
Generally, pressing this switch and setting
with the Temperature Switch (3) to a suit-
able temperature, the air conditioner will
run automatically.
●
Changing from automatic control to manual
control requires only resetting the air
fl
ow,
outlets and fresh air/recirculation mode.
The indicator above the switch goes out.
Remark:
When automatic control is selected, the air
fl
ow may remain at HIGH if the temperature is
set at 18
℃
(64.4
℉
) or 32
℃
(89.6
℉
). But
this is not a fault.
(6) Fresh air/recirculation switch
This switch (6) is used to open or close the
fresh air inlet.
●
After the switch is pressed, the indicator
above the switch is illuminated to indicate
a state of taking in fresh air.
●
Fresh air and recirculation modes toggle
automatically in automatic control.
Recirculate
The air inlet is closed. The air will recirculate in the operator cab.
It is suitable for rapid cooling or heating of the operator cab. It is also used
when the external air is contaminated.
Fresh Air Intake
Fresh air is taken into the operator cab.
It is used to take in fresh air and defog.
AUTO
CZ335-1103101
CZ135B-1103012
Fig. 3-95
Fig. 3-96