(A) ON/OFF BUTTON:
Your ASU-9 unit’s ON/OFF button has two uses: The first is to turn your ASU-9 unit on and off. The second allows for you to
select temperature display in either Fahrenheit or Celsius. Temperature display can be changed to indicate either degrees (F) Fahrenheit or degrees
(C) Celsius. To change between temperature scales: While unit is plugged in and turned off, Press and hold the ON/OFF button for five seconds,
after 5 seconds the display will show “de9F” or “de9C”, release the ON/OFF button, display will continue to show “de9F” or “de9C” for three seconds
then display will go blank: Press ON/OFF button to turn your ASU-9 unit on. Display will show temperature followed by “F” or “C” to allow at glance
recognition of temperature scale. Repeat this step to change temperature scale again.
“de9F” indicates your ASU-9 unit will display temperature in Fahrenheit.
“de9C” indicates your ASU-9 unit will display temperature in Celsius.
(B) POWER INDICATOR “ON” LIGHT:
Your ASU-9 unit is equipped with an on indicator light. When illuminated the on light indicates Power is ON.
(C) CYCLING INDICATOR LIGHT:
Your ASU-9 unit is equipped with a cooling system cycle indicator light. When cycle light is “ON”, this indicates
your ASU-9 unit is cooling down to the desired temperature. When the ASU-9 refrigeration compressor is running the cycle light will come “ON” until
your ASU-9 has reached the desired temperature, and go “OFF” when your ASU-9 has reached desired temperature.
(D) TEMPERATURE DISPLAY:
Your ASU-9 unit allows you to select the temperature display in two modes, Actual temperature or Set Point
temperature. Set Point temperature is the FWE factory default. In circumstances where displaying the Actual temperature is desired the FWE ASU-9
AIR SCREEN allows you to choose this function. Actual temperature will display internal cabinet temperature acting as an internal thermometer.
To switch between Set-Point and Actual temperature display press and hold the temperature recall button. Display will flash “S” or “A” then display
“SET” for Set-Point or “ACT” for Actual. When display is “SET” or “ACT” release the temperature recall button, to accept the new setting press and
release the temperature recall button.
(E) TEMPERATURE SETTING:
Your ASU-9 units operating temperature is PRE-SET at 34°F (1.1°C) with an operating temperature range of
33°F to 38°F ( 0.56°C to 3.33°C). To change temperature press the up or down arrow temperature setting buttons.
(F) TEMP RECALL:
Your ASU-9 unit is equipped with an easy access temp recall button. The temp recall button has two uses.
First
is to momentarily display set-point or actual temperature. When your ASU-9 unit is set to display Set-Point temperature press and release the
temp recall button to see actual temperature, display will show actual temperature for 3 seconds then revert back to Set-Point display. When your
ASU-9 unit is set to display actual temperature press and release the temp recall button to see set-point temperature, display will show set-point
temperature for 3 seconds then revert back to actual temperature display.
Second,
The temp recall button is used to change temperature display
between Set-Point and Actual temperature. Item (D) above describes how to change the display.
(G) DEFROSTING THE EVAPORATOR COIL:
Your FWE ASU-9 AIR SCREEN unit offers you four defrost options.
First
is a smart auto defrosting option. Smart defrost is the factory default option and requires you to do nothing, the defrost cycle is automatic.
Sensors on the evaporator coil read coil temperature and decide how long and how often your ASU-9 unit requires defrosting.
Depending on usage and environment your ASU-9 unit will defrost in intervals of 4, 6, and 8 hours.
Second
defrost option is a user selected defrost time interval. This will allow you to select defrost time intervals that work best for your operation.
You can select ASU-9 unit defrost time intervals from every 4 hours to every 8 hours in one hour increments. To activate and set your custom defrost
option press and hold the manual defrost, up arrow and down arrow buttons for ten seconds. The controller will beep and display a flashing 4HR,
use the up and down arrow button to set your desired defrost interval time. When desired defrost interval time is reached press the temp recall button
to accept your defrost time option. To unselect your timed defrost option repeat same steps and use the up or down arrow buttons until display shows
“OFF”, press the temp recall button to accept. This will revert back to the worry free auto smart defrost option. Important note: If you do select to use
the timed interval defrost option FWE recommends setting the defrost interval at every 8 hours.
Third
defrost option is a manual forced defrost. This is simply pressing the manual defrost button at any time you need to defrost the ASU-9
evaporator coil. Pressing the manual defrost button will start a defrost cycle at any time regardless of what defrost option is selected. The light
above the manual defrost will illuminate to let you know the unit is in defrost. The manual defrost button has a second function, when your
ASU-9 unit is in a defrost cycle you can terminate the defrost by pressing the manual defrost button, allow two minutes for cooling cycle to start.
Fourth
defrost option is a hard defrost. This option will start a prolonged defrost cycle and should only be used in case of extreme evaporator ice
build up.
You should only use the hard defrost option when instructed to do so by a member of FWE’s customer service staff.
FWE customer service 815-459-7500.
During a defrost cycle the indicator light located above the manual defrost button will illuminate. The cooling system condenser/compressor and
fans are momentarily disabled. Defrost feature allows proper defrosting of accumulated ice build up on the evaporator coil. The defrost cycle can be
cancelled by pressing the manual defrost button. If a defrost cycle is cancelled in this manor there is a two minute wait period before the cooling
system starts.
During a defrost cycle the condensation from the evaporator coil will flow from the top of the unit down a drain line to the condensate vapor pan.
The condensate vapor pan will automatically evaporate all defrost condensation. There is no need to empty a defrost water pan. Vapor can
sometimes be visible and should be considered a normal operating condition. Proper attention should be given to defrost your ASU-9.
Every “Event” or time the unit is used with door open, the coil may build up ice reducing the effectiveness and overall operation of your ASU-9.
FWE ASU-9 AIR SUPREMACY AIR SCREEN
ELECTRONIC CONTROLS
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