Komatsu WA380-6 Operation & Maintenance Manual page 145

EXPLANATION OF COMPONENTS
RECIRC/FRESH SELECTOR SWITCH
Use this switch (6) to switch between recirculation of the air inside
the cab and intake of fresh air from outside.
When this switch is pressed, recirculation of inside air is selected
and (A) lights up on the display monitor.
If the switch is pressed again, intake of fresh air is selected and (B)
lights up on the display monitor.
Recirculation of air inside cab
Only the air inside the cab is circulated. Use this setting when
carrying out quick cooling or heating of the cab or when the outside
air is dirty.
Intake of fresh air from outside
Air from the outside is taken into the cab. Use this setting when
taking in fresh air from outside or when removing the mist from the
windows.
CONTROL METHOD
COOLING OPERATION
1. Press main power switch (1) of the air conditioner to turn the
power ON.
2. Press fan switch (2) and set the air flow to "Hi".
3. Press temperature control switch (3) to set to the desired
temperature.
4. Press air conditioner switch (4) to turn the air conditioner
switch ON.
5. Press RECIRC/FRESH selector switch (5) to select RECIRC.
6. Press mode selector switch (6) to set the vents to FACE.
7. When the temperature inside the cab goes down, use the
temperature control switch and the fan switch to set to the
desired temperature.
8. When the AUTO switch is pressed, the temperature and
location of the vents are automatically selected.
REMARK
Note that if the temperature control switch is pressed to set the temperature to the lowest position, and the air
conditioner is run for a long time with the air flow at "Lo", in rare cases, the evaporator may freeze.
If it freezes and no cold air comes out, turn the air conditioner switch OFF, raise the temperature setting, run for a
short time with the air flow at "Hi", then turn the air conditioner switch ON again.
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OPERATION