46
Freezestat LED
If the coolant temperature delivered to the process
drops below the Freezestat Limit (FLS) setting, the
compressor will shut off, the pump will remain
running, and the Freezestat LED will light. The
Freezestat Limit should be set 10°F above the
freezing point of the glycol solution and 10°F below
the minimum operating temperature. The Freezestat
is factory set at 38°F. In order to reset the Freezestat
fault press the Alarm Reset button after the
temperature has risen 5°F above the Freezestat Limit.
See the Program Menu section for instructions on
how to adjust FLS.
Low Reservoir Level LED
When the water level in the reservoir drops below
the lower limit of the float switch, the Low Water
Level LED is illuminated and the pump will shut off.
Compressor Recycle LED
The number of compressor startups per hour is
limited in order to maximize compressor lifetime and
ensure proper return of oil to the compressor
crankcase. This light is illuminated yellow whenever
there is a wait period before the compressor can
start.
High Refrigerant Pressure LED
If the compressor discharge refrigerant pressure
exceeds the setting on the high refrigerant pressure
safety, the compressor and pump will shut off and
the High Refrigerant Pressure LED will light. Pressing
the Alarm Reset button will reset the High
Refrigerant Pressure fault, as long as the High
Refrigerant Pressure switch located at the discharge
of the compressor has reset.
Low Refrigerant Pressure LED
If the compressor suction pressure drops below the
setting on the low refrigerant pressure safety, the
compressor will shut off, the pump will remain
running, and the Low Refrigerant Pressure LED will
light. Pressing the Alarm Reset button will reset the
Low Refrigerant Pressure fault, as long as the
refrigerant pressure has risen back up above the
safety's cutout level.
Program Mode LED
The Program Mode LED will flash yellow while in the
programming menu.
Set Point Temperature Display
The Set Point Temperature Display normally displays
the set point temperature. An indicator light in the
lower right corner of this display area shows the
temperature unit of measure that has been set in the
programming menu. When the display is set to °F
there will be a green indication light, when the
display is set to °C there will be no green indicating
light. See the Program Menu section to change the
temperature scale units of measure.
In addition to displaying the set point temperature,
the Set Point temperature display shows other alarm
and programming information.
Process Temperature Display
The Process Temperature Display displays the
selected supply or return temperature. An indicator
light in the lower right corner of the display area
show the temperature displayed. When displaying
the supply temperature there will be an orange
indicating light, when the display is displaying return
temperature there will be no orange indicating light.
To toggle the Process temperature display from
supply to return temperature, press and release the
Display/Program button. The display will return to
the default Supply temperature automatically after 5
seconds without a button press. The display will
return to the default Supply Temperature
automatically after 5 seconds. In addition to
displaying the selected temperature, the display
shows other alarm and programming information.
Program Menu
The program menu provides access to a number of
control user-adjustable parameters and feature
enable/disable control. Access the program menu is
password protected to prevent unintended
alteration to the program settings and parameters.
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