Komatsu PC490-11, Installation And Instruction Manual

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FRESH/RECIRC AIR SELECTOR SWITCH
Use FRESH/RECIRC air selector switch to switch the air
source between recirculation of the air inside the cab and in-
take of fresh air from the outside.
During automatic operation, the selection of inside air (RE-
CIRC) and outside air (FRESH) is performed automatically.
RECIRC
Outside air is shut off and only air inside the cab is circulated.
Use this setting to perform rapid cooling of the cab or when
outside air is dirty.
FRESH
Outside air is taken into the cab.
Use this setting to take in fresh air or to demist the window glass.
DISPLAY MONITOR
This monitor display indicates the status of temperature setting
(a), air flow rate (b), and vents (c).
When OFF switch (1) is pressed, the display of temperature
setting (a) and air flow rate (b) go out, and operation stops.
AIR CONDITIONER SWITCH
Use air conditioner switch for turning the air conditioner (cool-
ing, dry heating) ON or OFF.
• Press air conditioner switch when the fan is operating
(when display (b) is shown on the display monitor). The air
conditioner is switched ON and starts to work. Press the
switch again to stop the air conditioner.
• Air conditioner cannot be operated while the fan is stop-
ped.
HANDLE AIR CONDITIONER OPERATION
3-222