Komatsu HD325-8, Operation & Maintenance Manual

Page: 302 / 464

AUTO SWITCH
Auto switch is used to switch the operation to the automatic op-
eration.
It changes the air flow and vents, recirculated air and fresh air
automatically according to the set temperature and the ambient
environment.
This switch is also used as the main switch of the air condition-
er.
• When the auto switch is pressed, the automatic operation
symbol on the air conditioner display lights up to indicate
that the air conditioner is in the automatic mode.
• When each switches is operated, automatic operation
shifts to the manual operation, and the automatic operation
symbol on the air conditioner display goes out.
• When clearing the window mist at low temperature, use
the defroster switch.
REMARK
The automatic operation of the air conditioner is controlled au-
tomatically according to the set temperature and the ambient
environment.
If the environment changed suddenly by leaving cab door open
for a long time, etc., the control of air conditioner may change
temporarily, but this is not a failure.
Even if the control changes, it returns automatically to control
the air according to the set temperature and the ambient envi-
ronment after certain period of time elapses.
FRESH/RECIRC AIR SELECTOR SWITCH
Use the 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.
The air source is automatically switched between recirculation
of the air inside the cab and intake of fresh air from the outside
during the automatic operation.
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.
REMARK
Intake of external air (FRESH) is automatically selected when the cab door is opened. Selection by use of the
FRESH/RECIRC air selector switch is not available.
When the cab door is closed, the setting returns to the one which has been set before the cab door was
opened.
HANDLE AIR CONDITIONER OPERATION
3-242