Komatsu WA470-6 2006, Operation & Maintenance Manual

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3.2 Explanation of components Operation
3-86
WA470-6H – VEAM946100
Precautions when using
To prevent putting any excessive load on the engine or compres-
sor, turn the air conditioner ON only when the engine is running.
Ventilation
!
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 period of time,
carry out ventilation process at least once every hour.
Temperature control
For reasons of health, the optimum setting for cooling is consid-
ered 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.
Precautions for inspection and maintenance
When carrying out inspection and maintenance of the air condi-
tioner, follow the table given in "Check air conditioner (4-49)".
To allow the air conditioner to show its full performance and pro-
vide a comfortable environment, have inspection and mainte-
nance carried out periodically.
When adding refrigerant or carrying out other maintenance, spe-
cial tools and instruments are needed, so ask your KOMATSU
distributor to carry out inspection and repair.