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1) Press and hold the up and down buttons simultaneously for 3 seconds. Press the
"ENTER" button until the dF frequency is displayed.
2) To change the time-initiated defrost frequency, press the up and down buttons until
the desired value is displayed. The defrost frequency is adjustable between 1 and
12 defrosts per 24 hours. The factory default for freezers is 6.
3) To save the value, press the "ENTER" button repeatedly until you have cycled through
the menu and the unit returns to the normal display mode. If you do not cycle through
the menu and no button is pressed in 15 seconds, the display will return to normal and
the defrost frequency will remain unchanged.
Note: The change in the defrost setting will take effect after the next defrost based
on the previous setting. To make this change in interval timing take effect
immediately, turn the unit off and back on. The next time-initiated defrost will take
effect "x" hours after power is resupplied. For example, if the setting is df 6, x=4,
the next defrost occurs 4 hours from the time that power is applied.
Primary defrost termination is controlled by the defrost thermistor. However, 2 additional
defrost termination safeties are present:
• Time-Termination - 1 hour maximum.
• Temperature-Termination - Measured by a separate device that is in-line with the
heaters and independent of the control board.
E. Food Storage
• This unit is designed only for temporary storage of food. Employ sanitary methods. Use
for any other purposes (for example, storage of chemicals or medical supplies such as
vaccine and serum) could cause deterioration of stored items.
• Do not block the cabinet air inlet or outlet, otherwise cooling performance may be reduced.
• Do not tightly pack the cabinet with food. Allow some space between items/containers to
ensure good air flow. Also allow space between food product and interior surfaces.
• Do not put warm or hot foods in the cabinet. Let them cool first, or they will raise the
cabinet temperature and could deteriorate other foods in the cabinet or overload the unit.
• All foods should be wrapped in plastic film or packed in a container. Otherwise foods
may dry up, pass their smells onto other foods, cause frost to develop, result in poor unit
performance, or increase the likelihood of cross-contamination. Certain dressings and
food ingredients, if not stored in containers, may accelerate corrosion of the evaporator,
resulting in failure.
F. Perimeter Frame Heater
This unit is equipped with a perimeter frame heater. The perimeter frame heater is
controlled by the perimeter frame heater switch located on the control box. To help
prevent the formation of condensation on the front frame, turn the perimeter frame
heater on (perimeter frame heater switch red marking visible). If operating the unit under
conditions where condensation does not form, this heater may be turned off (perimeter
frame heater switch red marking hidden).
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