Komatsu PC450-8 Operation & Maintenance Manual page 159

OPERATION
2. Use temperature set switch (3) to set to the desired tem-
perature. The air flow, combination of vents, and selection
of fresh or recirculated air is automatically selected accord-
ing to the set temperature, and the air conditioner is oper-
ated automatically to provide the set temperature.
REMARK
When vent display monitor (c) displays (d) or (e), and engine
coolant temperature is low, the air flow is automatically limited
to prevent cold air from blowing out.
Stopping Automatic Operation
Press OFF switch (1). Operation stops.
DETAILED CONTROLS AND GAUGES
3-93