Komatsu PC350LC-8, Operation & Maintenance Manual

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DETAILED CONTROLS AND GAUGES
OPERATION
3-108
Use Air Conditioner with Care 3
NOTICE
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When running the air conditioner, always start with the engine running at low speed. Never start the air
conditioner when the engine is running at high speed. It will cause failure of the air conditioner.
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If water gets into the control panel or sunlight sensor, it may lead to unexpected failure, be careful not
to let water get on these parts. In addition, never bring any flame near these parts.
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For the auto function of the air conditioner to work properly, always keep the sunlight sensor clean
and do not leave anything around the sunlight sensor that may interfere with its sensor function.
Ventilation
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When running the air conditioner for a long time, turn the lever to the FRESH position once an hour to carry
out ventilation and cooling.
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If you smoke when the air conditioner is on, the smoke may start to hurt your eyes, so open the window and
turn the lever to FRESH for a while to remove the smoke while continuing the cooling.
Temperature Control
When the cooler is on, set the temperature so that it feels slightly cool when entering the cab (5 or 6 °C lower than
the outside temperature). This temperature difference is considered to be the most suitable for your health, so
always be careful to adjust the temperature properly.
Inspection and maintenance of Air Conditioner Equipped Machine 3
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When carrying out inspection and maintenance on machines equipped with an air conditioner, carry out the
inspection and maintenance according to the chart. For details, see “CHECK AND MAINTENANCE AIR
CONDITIONER (4-42), CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST (4-53),
CLEAN AIR CONDITIONER FRESH/RECIRC FILTERS (4-66)“.
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When the air conditioner is not being used every day, to
prevent loss of the film of oil at various parts, run at the
engine at low speed from time to time and carry out cooling
or dehumidifying heating for several minutes.
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If the temperature inside the cab is low, the air conditioner
may not work. In this case, circulate fresh air to warm the
inside of the cab. When the air conditioner switch is turned
ON, the air conditioner will work.
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If any abnormality is detected in any equipment or sensor
used on the air conditioner, “A/C Controller Error“ is dis-
played on the air conditioner monitor screen. If “A/C Con-
troller Error“ is displayed, please ask your Komatsu
distributor to carry out inspection and repair.