Follett FZR Series - Manual (Page 6)

Controller operation
In normal operation the controller displays cabinet temperatures
in degrees C (default) or user-selected degrees F. Degrees 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 -25 C (-13 F) set point
which provides a compressor cut-in at -23 C (-9 F) and cut-out at
-25 C (-13 F). The controller set point can be raised to -15 C (+5 F)
for nourishment applications where a lower temperature is not
desired (i.e. ice cream). Follow instructions for changing temperature
cut-out below.
All set points have a 2 C differential. The 2 C differential means that with a -25 C set point, for example, the
compressor will turn off at -25 C (-13 F) and turn on when it reaches -23 C (-9 F).
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 and °C (°F) will fl ash
3 seconds
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
To change temperature display from degrees C to degrees F
Follett includes a programming key (part# 00193375) that changes the display and temperature settings from
degrees C to degrees F.
Programming freezer from a degree F key (download)
1. TURN OFF freezer.
2. Remove 6 screws from panel holding controller to access back of controller.
3. Insert degree F programmed key into 5 PIN receptacle on controller back.
4. TURN ON freezer.
5. Values from key automatically download to freezer (“dol” message blinks followed by “end”).
6. After 10 seconds display returns to current freezer temperature and controller will restart with new values.
7. TURN OFF.
8. Remove key.
9. Reinstall panel.
Note: An “Err” message displays for failed programming. Turn freezer OFF then ON to restart download, or
remove key to abort.
6
°C
- 25
evaporator
fan
energized
defrost
refrigeration
system
energized
Fig. 7