Controller operation
In normal operation the controller displays cabinet temperatures in
°C (default) or user-selected °F. °C temperatures are displayed to 1
decimal point.
Rocker buttons to the right of the temperature display control all
programming functions.
The controller is pre-programmed with a +3.5°C (+38°F) set point
which provides a compressor cut-in at +3.5° (+38°F) and cut-out at
+5.0°C (+41°F).
All set points have a 1.5°C differential. The 1.5°C differential means
that with a +3.5°C set point, for example, the compressor will turn off
at +3.5°C (+38°F) and turn on when the cabinet temperature reaches
+5°C (+41°F).
This temperature may not reflect the temperature of the blood products in the refrigerator. The temperature of the
blood products will be reflected on the recorder chart and the recorder's digital temperature display. At times there
may be a difference between the two displayed temperatures. Adjust the controller SET value to achieve your
desired blood product temperature as displayed on your chart recorder.
5
2.5
°C
SET
prg
refrigeration
system
energized
Fig. 6
To display temperature cut-out
STEP INPUT DISPLAY
1 Press and release SET Current cut-out temperature will display for approximately 5 seconds.
Display will return to current refrigerator temperature.
To change temperature cut-out
STEP INPUT DISPLAY
1 Press and hold SET for Current cut-out temperature displayed, refrigeration system
3 seconds energized LED flashes
2 Press UP or DOWN arrows to New cut-out temperature displayed
desired cut-out temperature
3 Press and release SET New cut-out temperature blinks three times, then current refrigerator
temperature will display
Refer to the chart below for the set point for your application's required temperature range.
SET POINT °C CUT-IN °C CUT-OUT °C NORMAL DISPLAY RANGE °C
+3.5°C +5.0°C +3.5°C 1.5° to 5.0°
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