operators_manual

distribution to maximize clearing of the
windshield. The system will remain in this
mode until the driver presses the button
again or adjusts the dials.
The air temperature in MAX defrost mode
will be set to the warmest temperature
setting. This setting helps to clear the
windshield of ice and fog more quickly.
Outside air mode and the air conditioner
compressor are also active to maximize
performance. The A/C compressor and
recirculation switches are disabled in MAX
Defrost.
Sleeper Heater and Air Conditioner
Controls (Optional)
General information about the sleeper
heater and air conditioner controls.
Unlike the cabin air temperature controls,
the sleeper temperature control will alter
the air temperature based on the knob
setting.
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1. Air Speed
2. Compressor
3. Temperature Adjustment
The temperature control is not keyed to
specific temperatures. Turning
counterclockwise means cooler than it is
now. Clockwise means warmer than it is
now. Once the desired temperature is
reached, the system will maintain it
automatically. A separate switch on the
dash HVAC unit will send power to the
"bunk" or sleeper control unit The button
on the cab HVAC unit must be pressed and
in the ON mode to use the sleeper
controls.
Power to the sleeper HVAC unit can be
toggled using the button inside the air
distribution dial. When activated, the
indicator on the button illuminates. The
sleeper HVAC unit will function to the
settings of the sleeper control.
NOTE
On the Cab Control Unit, the sleeper
enable switch must be pressed to turn
ON power to the sleeper control unit.
In addition, if air conditioning is re-
quested in the sleeper, the air condi-
tioner switch on the cab control unit
will be turned ON and fan in the cab
heater and air conditioning unit will be
turn on low (if it was OFF) automatical-
ly.
NOTE
The sensor is located on the sleeper
heater -A/C control panel and meas-
ures the sleeper air temperature at the
panel. There will be a time delay be-
tween temperature control adjustment
and sleeper air temperature change.
Also, be careful of any heat source
which could affect the air temperature
by the sensor. Avoid hanging items (eg
shirt, jacket, hats) which could block
the air flow to the sensor
CONTROLS - Heating and Air Conditioning
118 Y53-6047-2HEN (03/18)
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