6
803877 Rev. 00
On/Off Key
Each press of the key toggles the unit from an OFF
state to an ON state or from an ON state to an OFF
state. Heating and cooling functions, as well as the
display, and all indicating LEDs except for the fan
indicators, are enabled or disabled with this key. When
toggled OFF, the control preserves only two modes
active; fan-only, and room freeze protection.
Fan Key
Each press of the Fan Key cycles the fan through three
modes of operation; Low Speed, High Speed and Auto.
Small green LEDs will indicate the mode. The On/Off
key need not be ON to operate the fan and set fan
speeds. Auto Mode will cycle the fan on and off, and
determine the fan speed, in conjunction with the
heating or cooling demand.
Warmer Key
Pressing the Warmer Key will cause the display to
show the set point temperature for 3 seconds, and then
increases room temperature by 1 degree for every
subsequent press of the key.
Cooler Key
Pressing the Cooler Key will cause the display to show
set point temperature for 3 seconds, and then decreases
room temperature by 1 degree for every subsequent
press of the key
°F/°C Key
This key toggles the display between Fahrenheit and
Celsius temperature modes, and affects all displayed
temperatures.
Heat Key
The Heat Key toggles the unit in and out of heating
mode for every press of the key, provided the On/Off
Key is ON.
Cool Key
The Cool Key toggles the unit in and out of cooling
mode for every press of the key, provided the On/Off
Key is ON.
Figure 1
OPERATION USING KEYPAD
When the unit is first plugged in, or when recovering
from a power outage, there will be a random 5 to 15
second delay before the electronic control powers up.
This minimizes the large electrical surge that would
otherwise occur if all units in a building started up at
the same time.
To Initiate Heating or Cooling Mode
Press On/Off Key to turn on the LED display and
commence full functionality. Push the °F/°C Key to
obtain the desired temperature scale. Press the Heat or
Cool key as applicable, and the current indoor
temperature will be shown on the display.
Set Desired Temperature
Press Cooler or Warmer key as applicable. Each push
of the key increases or decreases the set point
temperature by 1 degree, as applicable.
