Komatsu PC80MR-5E0, Operation & Maintenance Manual

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HANDLE AIR CONDITIONER
• When the air conditioner is not used every day, to prevent loss of the film of oil at various parts, run the air
conditioner with the engine at low speed from time to time and perform cooling or dry heating for several
minutes.
• When the temperature inside the cab is low, the air conditioner may not work. In this case, circulate recircu-
lation air to warm the inside of the cab. After that, turn on the air conditioner switch, the air conditioner will
work.
Ventilation while cooling
• When running the air conditioner for a long time, turn the lever to FRESH position once an hour to perform
ventilation and cooling.
• If you smoke when the air conditioner is on, the smoke may hurt your eyes. In such case, open the window
and turn the lever to FRESH for a while for ventilation and cooling to discharge the smoke.
Temperature control
For reasons of health, the optimum setting for cooling is considered to be that you feel slightly cool when you
enter the cab (5 to 6 °C lower than the ambient temperature).
Be careful to select the appropriate temperature.
Phenomena that are not failures
While operating or driving the machine, it takes some time that air conditioner starts working. This is due to low-
ering of hydraulic pump output, and not a failure.
EXPLANATION OF AIR CONDITIONER EQUIPMENT
RKA64040
(1) Temperature control switch
(2) Air flow selector switch
(3) Air conditioner switch (4) FRESH/RECIRC air selector lever
(5) Vent
HANDLE AIR CONDITIONER OPERATION
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