operators_manual

NOTE
Fan Control Dial must also be in the
ON position for A/C to be on. A/C en-
gages automatically in AUTO, defrost,
and floor/defrost.
The air conditioner defaults to Manual
mode when turned on. The fan speed, air
temperature, and air outlets are selected
using the dials on the controller.
1. To adjust the fan speed, turn the
Fan Control dial clockwise to
increase speed or
counterclockwise to decrease
speed.
2. To adjust the temperature setting,
turn the Temperature Control dial
to the desired temperature. The
system automatically adjusts the
outlet air temperature to achieve
the desired cab temperature.
3. Push the Air Conditioner button if
the air temperature needs to be
colder, this button will manually
turn on the compressor
4. To adjust the air distribution, turn
the Air Distribution dial to
distribute cab air as indicated by
the dial graphics.
5. Press the Recirculation button to
use cab air instead of outside air.
The temperature of the air from the vents
will fluctuate as the vehicle works to
achieve the chosen cab temperature.
When idling for short periods of time, keep
the fan ON and turn OFF recirculation.
For vehicles with a sleeper, the cab control
can be used to activate/deactivate the
sleeper HVAC using the button inside the
mode dial.
Auto Mode for the Air Conditioner
The Auto Mode will manipulate the air
distribution, air temperature, fan speed,
A/C compressor, and cab air recirculation
to achieve the comfort level selected on
the temperature dial. Depending on the
specific environmental conditions, the air
temperature can be slightly higher or lower
than the set point. This is a normal function
of the AUTO mode and is not to be
mistaken for a malfunctioning system. The
button that enables automatic mode is
labeled AUTO.
The system will remain in automatic mode
until the driver adjusts the dials on the
control. Adjust the temperature knob and
the system will respond to obtain the
selected comfort level as quickly as
possible.
The cab temperature is set using the
temperature control dial. The operating
range is 60°F (16°C) and 84°F (28°C).
Adjustments are made in two degree
increments.
The AUTO function uses a sun light sensor
to measure the amount of sunlight entering
the cab. This sensor is located at the base
of the windshield on the driver’s side of the
instrument panel. Do not block this sensor.
Semi-automatic Mode
During AUTO mode, the operator may
override any setting and operate in a semi-
CONTROLS - Heating and Air Conditioning
118 Y53-6126-1A1 (01/21)
3