Komatsu GALEO HM350-2 Operation & Maintenance Manual page 119

EXPLANATION OF COMPONENTS
PRECAUTIONS WHEN USING AIR CONDITIONER
To prevent putting any excessive load on the engine or compressor, turn the air conditioner ON only when the
engine is running.
Carry out ventilation from time to time when using the cooling.
When turning the cooling on, if the temperature inside the cab is high, open the doors and windows to bring in
fresh air before starting the air conditioner.
If you smoke when using the cooling, your eyes may sting. If this happens, switch temporarily to cooling and
ventilation to remove the smoke.
When using the air conditioner for a long time, carry out ventilation and cooling once every hour.
Be careful not to cool the cab too much.
For reasons of health, the optimum setting for cooling is considered to be when it feels slightly cool (5 or 6°C (9 or
10.8°F) lower than the ambient temperature) when you enter the cab. Do not make the temperature inside the cab
too low or direct the air flow directly onto your skin.
Be extremely careful to select the appropriate temperature.
When cooling is not being used (off-season)
To prevent leakage of the refrigerant from the air conditioner cooling circuit, operate the air conditioner for several
minutes 2 or 3 times a month during the off-season. If the air conditioner is left for a long time when the refrigerant
is leaking, it may cause internal rust.
INSPECTION AND MAINTENANCE
Even when not using the air conditioner, run the compressor at low speed for several minutes once a week to
prevent the loss of the oil film at various parts of the compressor. (Run the engine at low speed and set the
temperature control lever to the central position.)
Clean the air filter and check the refrigerant. For details, see "CLEAN AIR CONDITIONER AIR FILTER (PAGE
4-30)" and "CHECK REFRIGERANT (GAS) LEVEL (PAGE 4-31)".
To enable the air conditioner to perform to the full and to maintain a pleasant working environment, always contact
your Komatsu distributor to have the air conditioner refilled with refrigerant and to carry out other checks.
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OPERATION