Komatsu GD555-5 Operation & Maintenance Manual page 132

OPERATION
METHOD OF OPERATION
COOLING OPERATION
1. Press main power switch (1) of the air conditioner to turn the
power ON.
2. Press fan switch (2) and set the air flow to "Hi".
3. Press temperature control switch (3) to set the LED display to
the COOL side.
4. Press air conditioner switch (4) to turn the air conditioner
switch ON.
5. Press RECIRC/FRESH selector switch (5) to select RECIRC.
6. When the temperature inside the cab goes down, use the
temperature control switch and the fan switch to set to the
desired temperature.
REMARK
If the temperature control switch is pressed to set the LED display to the COOL side, and the air conditioner is run
for a long time with the air flow or set to "Lo", there is a slight possibility that the evaporator may freeze.
If no cold air comes out, turn air conditioner switch (4) OFF, raise the temperature setting, run for a short time with
the air flow at "Hi", then turn the air conditioner switch ON again.
HEATING OPERATION
1. Press main power switch (1) of the air conditioner to turn the
power ON.
2. Press fan switch (2) and set the air flow to "Hi".
3. Press temperature control switch (3) to set the LED display to
the HOT side.
4. Press RECIRC/FRESH selector switch (4) to select FRESH.
5. When the temperature inside the cab goes up, use the
temperature control switch and the fan switch to set to the
desired temperature.
REMARK
Heating is carried out using the engine cooling water, so it can be carried out when the cooling water temperature
is high.
DRYING-HEATING AND DEMISTING OPERATION
1. Press main power switch (1) of the air conditioner to turn the
power ON.
2. Press fan switch (2) and set the air flow to the desired setting.
3. Press temperature control switch (3) and set to the desired
temperature.
4. Press RECIRC/FRESH selector switch (4) to select FRESH.
5. Press air conditioner switch (5) to turn the air conditioner ON.
REMARK
When the outside temperature is below 0°C (32°F), the air conditioner (compressor) may not operate.
EXPLANATION OF COMPONENTS
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