Komatsu PC138US-11 Operation & Maintenance Manual page 275

OPERATION
Set temperature (a) and air flow rate (b) are displayed on
"A/C Setting" screen.
2.
Use temperature control switch (3) to set to the desired
temperature.
The air flow, combination of vents, and selection of fresh or
recirculated air is automatically selected according to the
set temperature, and the air conditioner is operated auto-
matically to provide the set temperature.
REMARK
When (d) or (e) is displayed in vent (c), if the engine coolant
temperature is low, the air flow is automatically limited to pre-
vent cold air from blowing out.
METHOD FOR STOPPING AUTOMATIC OPERATION
Press OFF switch (1).
The air conditioner stops.
WENAM00111
HANDLE AIR CONDITIONER
3-205