Komatsu PC220LC -8 Operation & Maintenance Manual page 147

DETAILED CONTROLS AND GAUGES
Auto Switch
With switch (5), the
(RECIRC/FRESH) are automatically selected according to the set
temperature.
Press switch (5), then use temperature control switch (3) to set
the temperature, and run the air conditioner under automatic
control.
When switching from automatic operation to manual operation,
it is possible to use the switches to select the vents and air
source (RECIRC/FRESH).
REMARK
When Auto Mode is selected, if the set temperature is set to 18.0
°C (64.4 °F) or 32.0 °C (89.6 °F), the air flow is always set to High,
but this is not a problem.
FRESH/RECIRC Selector Switch
Switch (6) is used to switch the air source between recirculation of
the air inside the cab and intake of fresh air from the outside.
During automatic operation, the selection of inside air (RECIRC)
and outside air (FRESH) is performed automatically.
Outside air is shut off and only air inside the cab is circulated.
RECIRC
Use this setting to perform rapid cooling of the cab or when outside air is dirty.
Outside air is taten into the cab.
FRESH
Use this setting to take in fresh air when performing demisting.
Display Monitor
Monitor (7) displays the status of temperature setting (a), air flow
(b), and vents (c).
When OFF switch (1) is pressed, the display of temperature
setting (a) and air flow (b) goes out, and operation stops.
3 - 92
air flow, vents, and air source
OPERATION