Controls and Instruments 4-21
PA-1652 Operator's Manual H3-45 Coach
area.
3) Passenger section display
Displays the actual temperature in
the passenger area.
4) Passenger temperature set point
adjustment
Increases or decreases the
temperature set point for the
passenger area.
5) Driver HVAC power button
Turns on/off the driver HVAC unit.
6) Fan speed
Increases or decreases the fan speed.
7) Auto-defrost
Upon pressing this button, the
dashboard damper sends air only
to the lower windshield. The fan is
turned on to maximum speed, the
fresh air damper opens completely
(recirculate off) and the driver set
point is increased to 4 °F (2 °C)
over the passenger section set
point.
8) Air selection
Changes the air outlets used.
9) Recirculate
Switches between outside air and
recirculated air for the driver and
passenger area. This feature is
automatically canceled when the
windshield defrost is activated.
10) Passenger HVAC power button
Turns on/off the passenger HVAC unit.
Temperature Unit Selection °F / °C
To switch the temperature units, press
simultaneously both fan speed buttons for 3
seconds.
Driver Section Temperature Setting In Case Of
Temperature Sender Failure
On the driver section of the control unit only,
asking for a temperature set point above 82 °F
(28 °C) will keep the coolant valve open .
In case of interior temperature sender unit failure,
the coolant valve will remain open.
Passenger Section Temperature Setting In
Case Of Temperature Sender Failure
In case of interior temperature sender unit failure,
the coolant valve will remain open. The driver can
nevertheless control the temperature by adjusting
the temperature set point above 72 °F (22 °C) to
heat and below 72 °F (22 °C) to cool.
NOTE
To operate the air conditioning system when
stationary, run the engine at fast idle. When the
system is running, keep windows and door
closed.
To prevent battery run-down, the central A/C
and heating systems will not operate if the
charging system is not working properly.
When the A/C system is running, park at least 4
feet (1,5 m) from other vehicles or buildings to
allow sufficient air flow through the condenser
core.
Upon starting, if the outside temperature is
above 32 °F (0 °C) and then drops below 32 °F
(0 °C), the compressor will keep running up to a
temperature of 15 °F (-9 °C) to prevent fogging.
WARNING
Warm temperatures may cause drowsiness
and affect alertness while driving. Keep the
temperature comfortable but not too high.
NOTE
Upon starting of the vehicle, when the ambient
temperature is very cold and so is the inside of
the vehicle, the HVAC control unit will allow a
temperature overshoot up to 3° over the
passenger area set point to help warming up of
the area because some parts of the vehicle like
the seats and the overhead compartments
accumulate cold.
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