Komatsu ecot3 Operation And Maintenance Manual page 158

OPERATION
Use Air Conditioner with Care
NOTICE
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.
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.
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
When running the air conditioner for a long time, turn the lever to the FRESH position once 1 hour to carry out
ventilation and cooling.
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 (9 or 10.8
°F) 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
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 (PAGE 4-41), CHECK AIR CONDITIONER COMPRESSOR BELT TENSION, ADJUST (PAGE
4-52), CLEAN AIR CONDITIONER FRESH/RECIRC FILTERS (PAGE 4-62)".
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.
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.
If any abnormality is detected in any equipment or sensor used
on the air conditioner, "A/C Controller Error" is displayed on the
air conditioner monitor screen. If "A/C Controller Error" is
displayed, please ask your Komatsu distributor to carry out
inspection and repair.
DETAILED CONTROLS AND GAUGES
3 - 101