freightliner PX113064S T 2016, Manual

Page: 110 / 236

operational. The delay is caused by the blower
motor performing a self-test immediately after
the vehicle starts.
The fan knob controls the fan speed. The fan can be
set to move fresh or recirculated air through the air
outlets. To increase airflow, turn the knob clockwise
to a higher number. To decrease airflow, turn the
knob counterclockwise to a lower number. The fan
knob has ten fan speed settings and an off position.
See
Fig. 8.12 .
Recirculation Mode
NOTE: If the mode control switch is in defrost
mode, recirculation mode isn’t available.
Recirculation mode limits the amount of outside air
entering the cab. Recirculation mode can also
decrease the time required to cool or heat the cab
interior when environmental temperatures are either
extremely hot or extremely cold.
Press the recirculation mode button shown in
Fig. 8.12 to prevent drawing dusty, smoky, extremely
hot, or extremely cold air into the cab. An amber
indicator on the recirculation button illuminates when
the recirculation mode is activated.
To prevent the buildup of odors and oxygen depletion
inside the cab, the system changes from full
recirculation mode to partial recirculation mode after
20 minutes. During extreme climate conditions or
when driving through dusty or smoky conditions, the
partial recirculation mode can be overridden by
pressing the recirculation button twice to switch back
to full recirculation mode for another 20 minutes.
Temperature Control Knob
The temperature control knob is used to select the
desired temperature in the cab. Turn the knob
counterclockwise for cool air, or clockwise for hot air.
See
Fig. 8.13 .
Air Conditioning Button
The air conditioner (A/C) cools and dehumidifies the
air inside the cab. Press the A/C button, located in
the center of the temperature control knob as shown
in
Fig. 8.13 , to turn the air conditioner on and off.
The A/C has three modes:
•
Off
•
Economy (ECO); green LED
•
Full A/C (maximum cooling); blue LED
The ECO mode does not cool the air temperature as
low as the full A/C mode but draws less energy.
If full A/C mode is selected, the system changes to
ECO mode after 45 minutes to increase energy
efficiency. The button LED changes from blue to
green to indicate this shift. To return to full A/C mode
for 45 minutes, push the A/C button again.
Mode Control Knob
The mode control knob allows the driver to control
the flow of air through the face outlets, the floor
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1. Recirculation Mode Button
Fig. 8.12, Fan Knob
f612022 03/21/2022
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1. Air Conditioning Button
Fig. 8.13, Temperature Control Knob
Cab Features
8.7