Method For Operating To Prevent Dust From Entering Into Cab; Method For Checking During Off Season - Komatsu D37EX-24 Operation & Maintenance Manual

HANDLE AIR CONDITIONER
BLOWER CHANGEOVER SWITCH
Blower selector switch is used to control the air flow at cooling
and heating, and also used as a main switch.
• It changes the air flow in 4 levels of 1 (low) → 2 → 3 → 4
(high).
• If this switch is turned to OFF position, power supply is
turned off and air conditioner function stops.
TEMPERATURE CONTROL SWITCH
Temperature control switch is used to adjust the temperature of
cooling and heating.
• When turning the dial counterclockwise (direction to C),
the vent temperature lowers.
• When turning the dial clockwise (direction to H), the vent
temperature rises.
METHOD FOR OPERATING TO PREVENT DUST FROM ENTERING INTO
CAB
Raise the pressure inside of cab to a little higher than the ambient pressure in order to prevent dust from enter-
ing.
Use this method at dusty jobsite or when you want to prevent the entry of dust into the cab.
1.
Close the windows and doors.
2.
Set the blower selector switch to any position of 1 to 4.
Set the air conditioner mode selector switch and tempera-
ture control switch to your desired position.

METHOD FOR CHECKING DURING OFF SEASON

Even during the off-season, operate the air conditioner for 3 to 5 minutes once a month to maintain the oil film at
all parts of the compressor.
(Perform it in the condition that the engine is running at low idle and the temperature control switch is at center
position.)
REMARK
When the outside air temperature is low, if compressor runs at high speed suddenly, it may lead the failure of
compressor, so be careful. When the outside air temperature is 4.2 °C and below, even if the air conditioner is
turned on, compressor does not turn.
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OPERATION