PREVOST X3-45 2011 Operator'S Manual Download

Page: 61 / 214

Controls and Instruments

All parameters set before turning the system
OFF will be kept in memory for the next power
ON.

The HVAC module performs a self diagnosis
every time it is turned

. Codes are shown on

displays or flashed on control buttons. Refer to
"Maintenance Manual" for more information on
the diagnostic codes.

Heating Mode Indicator

22131

This red LED illuminates when system
is heating.

Cooling Mode Indicator

22134

This green LED illuminates when the
system is cooling (when the
compressor clutch is engaged).

Fan Speed

22135

The driver’s fan has six speeds.
Increase speed by pressing on the
upper portion of the button, decrease
by pressing on the lower portion.

Recirculate

22138

Closes or opens the driver's and
passenger's section fresh air
damper.

A red LED in the top right corner of the button
illuminates when air is recirculated. Use for
faster driver’s section heating.
This feature is automatically cancelled when
defogging is activated.

Driver's section temperature setting

22303

The temperature displayed on the
driver's side HVAC control unit is the
temperature set point.

22132

To increase the temperature set
point, press on the "+" sign, to
decrease the temperature set point,
press on the "-" sign. Temperature
range is between 60°F and 82°F
(16°C to 28°C). On the driver’s side
only, asking for a temperature set
point above 82°F (28°C) will keep
the coolant valve open and “FUL”
will be displayed.
In case of interior temperature
sender unit failure, the coolant valve
will remain open and three lines “---“
will be displayed.

WARNING

Warm temperatures may cause drowsiness
and affect alertness while driving. Keep the
temperature comfortable but not too high.

Passenger's section temperature setting

22304

The temperature displayed on the
passenger's side HVAC control unit is
the actual temperature in the
passenger's area.

22132

To increase or decrease the
temperature set point in the
passenger's area, press on the "+" or
the "-" sign. Pressing these buttons
will flash the displayed set point and
the word "SET" will highlight.
Temperature range is between 60°F
and 82°F (16°C to 28°C).
In case of interior temperature
sender unit failure, the coolant valve
will remain open and three lines “---“
will be displayed.

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 permit a
temperature overshoot up to 3° over the
passenger’s 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.

Windshield Defogger

22305

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
(REC off) and the driver set point is
increased to 4°F (2°C) over the
passenger's section set point.

22139

The dashboard damper sends air only
to the lower windshield when
activated. The footwell damper is
closed also but the fan speed can be
reduced or increased.

Panel and Footwell

22137

The dashboard damper sends air to
the panel vents and footwell.