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C. Defrost
This unit uses an off-cycle defrost. When a sensor in the evaporator coil reaches the
initiation setpoint, the unit enters defrost. When the sensor reaches the termination
setpoint, the unit ends defrost.
Units with a control board of revision level R23 or later (board revision level can be seen
on display at power up) also feature an adjustable time-initiated defrost along with the
normal temperature-initiated defrost.
The time-initiated defrost is factory set for normal conditions. Before changing this
setting, contact the HOSHIZAKI Technical Support Department for recommendations. If
necessary, adjust the time-initiated defrost frequency as follows:
1) Press and hold the up/down arrows simultaneously for 3 seconds. Press "ENTER" until
the dF frequency is displayed.
2) To change the time-initiated defrost frequency, press the up/down arrows until the
desired value is displayed. The defrost frequency is adjustable between 0 and 12
defrosts per 24 hours. The factory default is 6.
3) Press "ENTER" to set the value and view the next setting. If no change in the value is
desired, press "ENTER" and the unit will return to normal display mode.
Important Note:
For the change to take effect, you must cycle through the menu until
you return to the normal display.
Note: The change in the defrost setting will take effect after the next defrost based on
the previous setting. If it is desired that 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
and the next defrost will take place 4 hours from the time that power is applied.
D. Temperature Display Scale (°F or °C)
To change the display scale, follow the steps below.
1) Press and hold the up/down arrows simultaneously for 3 seconds. Press "ENTER" until
the F or C temperature display scale is displayed.
2) To change the temperature display, press the up/down arrows until the desired scale is
displayed. The factory default is F.
3) Press "ENTER" to set the value and return to normal display mode.
Important Note:
For the change to take effect, you must return to the normal display.
E. Perimeter Frame Heater
This unit is equipped with a perimeter frame heater. This prevents the formation of
condensate on the front frame of the unit under high humidity conditions. If operating the
unit under conditions where condensate will not form, these heaters may be turned off
using the switch on the control box.
