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InitialPowerOn
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 BOXTEMPERATURE
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.
On multiple evaporator systems the MASTER evaporator
will display BOXTEMPERATURE and Coo. The SLAVE
evaporators will display Cooonly.
When the room thermostat setting is satised, and if
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 BOXTEMPERATURE.
Start-UpOperation
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 four minute “HOLD-OFF” can be bypassed and the
system started immediately by pressing the “RESET”
button on the Beacon II board.
OperatingModeDisplay
oFF - Off
Coo - Cooling
Pdn - Pumpdown
dEF - Defrost
drn - Draining
dLY - Delay
tSt - Test
SEr - Service