14
Initial Power On
At the initial application of power to the system, the
compressor and the evaporator fans will be in a 4 minute
hold-off cycle and will not start immediately. When
there is a call for COOLING, the expansion valve (EEV)
opens, then the compressor is started. The compressor
will then run for a minimum of 2 minutes in the “hold-
on” cycle. (This means that the compressor will run for a
minimum of 2 minutes before shutting off even if the box
temperature is met).
The LED alternately displays BOX TEMPERATURE
and MODE of operation. On a call for cooling, dLY will
show while the expansion valve is opening. After the
compressor starts, the LED will alternately display BOX
TEMPERATURE and Coo.
When the room thermostat setting is satised, and if
Figure 10. Operating Mode Display
oFF – Off
Coo – Cooling
Pdn – Pumpdown
dEF – Defrost
drn – Draining
dLY – Delay
tSt – Test
SEr – Service
the compressor ran for at least 2 minutes, the EEV will
close and the compressor will pumpdown and shut off.
The evaporator fans will continue to run. The LED will
alternately display oFF and BOX TEMPERATURE.
When the room sensor detects a rise in temperature of
approximately 2°F, and the compressor has been off for
at least 4 minutes, the EEV will open to its last position
then the compressor will start. The valve is then adjusted
as necessary to obtain the setpoint superheat setting.
During this time, the compressor will run for a minimum 2
minutes “hold-on” cycle.
The 4 minute “hold-off” can be bypassed and the system
started immediately by pressing the “Reset” button on the
Beacon II board.
Beacon II Controller
IMPORTANT NOTE:
When a board is installed and power is applied to the system, the following initialization steps should be taken for EACH
BOARD in system:
1. Press and Hold the “ENTER” button
2. While continuing to hold the “ENTER” button, press and hold the “CLEAR/TEST” button. “888” will display
on the LED display.
3. Continue to hold both “ENTER” and “CLEAR/TEST” until “EE?” displays on the LED.
4. Once “EE?” displays, immediately release and the press the “ENTER” again.
5. The board will now re-initialize and return to the normal display.
If “nch” is displayed, then the board did not properly initialize and the steps 1-5 should be re-taken.
To Next Page
Loading...
Need help?
General
