Heatcraft Refrigeration Products BEACON II H-IM-79E, Installation And Operation Manual

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11
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
.
On multiple evaporator systems the MASTER evaporator
will display
BOX TEMPERATURE
and
Coo
. The SLAVE
evaporators will display
Coo
only.
When the room thermostat setting is satisfied, 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
BOX TEMPERATURE
.
Start-Up Operation
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.
Operating Mode Display
oFF
- Off
Coo
- Cooling
Pdn
- Pumpdown
dEF
- Defrost
drn
- Draining
dLY -
Delay
tSt
- Test
SEr
- Service