Self-Contained Hvac System For Truck Sleepers • Operation; Starting Up Your New System; The Smxir Keypad/Display - Dometic Kohler 7APU Operation And Installation

Self-Contained HVAC System for Truck Sleepers • Operation

Starting Up Your New System

SMXir Quick Start
Use the COOL or HEAT button to start desired function.
Push the SET button to put the switch into temperature
programming mode. Use the UP and DOWN buttons to
adjust the temperature up or down. Use the FAN button to
put the fan on automatic mode, or use the FAN SPEED
buttons to adjust the fan manually.

The SMXir Keypad/Display

The SMX keypad/displays are arranged for logical operation.
See next page for keypad/display diagrams.
1. Data Display
Large LED readout that provides indication of current
setpoint, temperatures, programmed values and error
messages.
2. Cooling Indicator
Lights when compressor is running in cooling mode.
3. Heating Indicator
Lights when system is running in heating mode. This unit
is supplied with electric heat only.
5. SET Key
Press the SET key to display your currently selected
setpoint (the temperature you wish to maintain in the
room). The SET key also is used to dim the data display
readout.
6. UP-DOWN Keys
Press UP or DOWN to raise or lower the setpoint. Press
and hold keys for large changes. Note: if inside tempera-
ture is displayed, touching the UP or DOWN key will
cause the setpoint to be displayed.
7. TEMP Key
Press once to display inside temperature. Press TEMP
twice, and the display will alternate between inside
temperature and setpoint. Press again to return to inside
temperature only.
Hint
You can display temperature in degrees Fahrenheit or
Celsius.
8. OFF Key
Turns system off. Note that the data display remains on.
You can continue to adjust setpoint, display temperature
readings and activate the manual fan to circulate air
while the system is in the OFF mode.
L-2347K Operation
9. Cool Mode Indicator
Lights when you press the COOL key to select the
cooling mode.
10. Heat Mode Indicator
Lights when you press the HEAT key to select the
heating mode.
11. COOL Key
Turns the system on in the cooling mode.
12. HEAT Key
Turns the system on in the heating mode.
Hint
Press both HEAT and COOL at the same time, and the
system will automatically switch between cooling and heating
mode. When in the automatic switchover mode, both the
COOL and HEAT indicators are lit.
13. Manual Fan Indicator
Lights when fan is running in manual mode.
14. SLOW-FAST Keys
Control fan speed when the fan is in the manual mode.
Pressing SLOW or FAST key when in automatic fan
mode will change the system into manual mode.
15. FAN Key
Selects manual or automatic fan control mode. Press
once to select manual control. Press FAN again to select
automatic fan speed control. In this mode, the fan speed
is controlled by the microprocessor as a function of the
difference between setpoint and inside temperature.
16. Fan Speed Indicators
Row of five small LEDs below FAN key. Indicate the
current fan speed.
17. Inside Temperature Indicator (SMXir Display Only)
When illuminated, inside temperature is displayed.
When light is off, setpoint is displayed.
18. IR Receiver (SMXir Display Only)
Infrared remote receiver
19. Dehumid Key (Remote Control Only)
Changes system into the Humidity Control program.
20. Auto Switchover Key (Remote Control Only)
Places the system into automatic changeover mode, so
it will switch from cooling to heating as needed.
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