Temperature Control; Automatic Defrost; Controller Operation; Controller Display - Follett REF2 Installation, Operation And Service Manual

Temperature Control

The temperature control system is preset by the factory to maintain a cabinet temperature of 3.3 – 5.5 C
(38 – 42 F). If desired, the set-point temperature can be raised as high as 10 C (50 F) by following the
instructions in Controller Operation for changing the temperature set point. The 2.2 C differential will be
maintained regardless of the controller set point.

Automatic Defrost

REF Series refrigerators do not require manual defrosting. The unit defrosts automatically when the condensing
unit is in the OFF cycle.
Any accumulated frost on the evaporator coil melts during the OFF cycle. The condensate drains to a plastic
drain pan mounted below the condensing unit. The heat from the condensing unit evaporates any condensate in
the drain pan.

Controller Operation

In normal operation, the controller displays product temperature in degrees C (default) or user-selected degrees F.
The controller is pre-programmed with a 4.4 C (40 F) set point. COMP displays when the compressor is running.
If this set point does not meet your specific application needs, instructions for changing the set point are found
below.
Note: Follett presets its refrigeration system to hold product temperature at approximately 4.4 C (40 F). If you are
using this in a food service application, and installing in accordance with NSF, you must set the control
set-point to 3.3 C (38 F). This will deliver a product temperature below the 4.4 C (40 F) NSF requirement.

Controller Display

The controller display will show the product/bottle temperature in degrees C or degrees F as selected by the user
except when the unit is in an alarm.
The controller has system indicators above the temperature display to let you know when: the compressor is
energized (COMP), the evaporator fan is energized (FAN) or the unit is in defrost (DEF).
To display temperature Set-point
Step
Press and release SET
1
To change temperature Set-point
Step
Press and hold SET for 3 seconds
1
Press UP or DOWN arrows to desired
2
set-point
3 Press and release SET to accept
Input
Current set-point temperature will display for approximately 5 seconds.
Display will return to current product temperature.
Input
Set-point will flash.
New temperature set-point will flash on the display.
Product temperature will display.
Display
Display
REF1/REF2 Compact Refrigerators 13