Komatsu WA250PT-5H, Operation & Maintenance Manual

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OPERATION
Explanation of components
Air conditioner
3-51
Method of operation 0.
When carrying out the defrosting, if the temperature control
switch is set so that all lamps are red, this will improve the per-
formance for defrosting and demisting.
Set the vent mode selector switch to the intermediate position
to give the desired condition.
With the FACE vents, it is possible to adjust the direction of the
air flow and to turn it on or off.
However, do not set to the FACE mode with the vents closed.
When not using the air conditioner regularly 0.
Run the air conditioner at cooling or dehumidifi heating for several minutes from time to time to prevent the
loss of the oil film at various parts of the compressor.
REMARK
If the temperature inside the cab is low, the air conditioner may not work. In such cases, use the recircu-
lated air to heat up the inside of the cab, then turn the air conditioner switch on to run the air conditioner.
Switchs
Condition of use
Fan switch
Air conditioner
switch
Temperature
control switch
FRESH/RECIRC
selector switch
Mode selector
switch
Cooling
Rapid HI ON All blue RECIRC FACE
Normal HI - LO ON
More than half
are blue
FRESH FACE
Dehumidifying,
heating
HI - LO ON
More than half
are red
FRESH FOOT
Heating
Rapid HI OFF All red RECIRC FOOT
Normal HI - LO OFF
More than half
are red
FRESH FOOT
Defroster HI ON
More than half
are red
FRESH DEF
Ventilation or pres-
surizing
HI - LO OFF All blue FRESH FACE