21
D. Defrost
1. Refrigerator
Refrigerators use an off-cycle, temperature-initiated or time-initiated defrost. The cabinet
temperature is displayed during defrost.
•
Temperature-Initiated Defrost:
When the defrost thermistor cools to 13°F (-10.6°C),
defrost begins. When the defrost thermistor warms to 40°F (4.4°C), defrost terminates.
After defrost, there is a 2 1/2 minute delay before the compressor starts.
•
Time-Initiated Defrost:
The time-initiated defrost is factory set at 0 for normal
operating conditions. Before changing the time-initiated defrost setting, contact your
local Hoshizaki distributor or Hoshizaki Technical Support at 1-800-233-1940 for setting
recommendations. If the factory time-initiated defrost setting is moved from 0 defrosts
per 24 hours, the appliance defrosts the number of times selected per day (6=6
defrosts per day (every 4 hours)). When the defrost thermistor warms to 40°F (4.4°C),
defrost terminates. If necessary, adjust the time-initiated defrost frequency as follows:
1) Press and hold the up and down buttons simultaneously for 3 seconds. Press the
"ENTER" button until "dF" is displayed.
2) To change the time-initiated defrost frequency, press the up or down button until the
desired value is displayed. The time-initiated defrost frequency is adjustable between
0 and 12 defrosts per 24 hours. The factory default is 0.
3) To save the value, press the "ENTER" button repeatedly until you have cycled through
the menu and the appliance returns to the normal display mode. If you do not cycle
through the menu and no button is pressed in 15 seconds, the display returns to normal
and the defrost frequency remains 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 appliance 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, 1 additional
defrost termination safety is present:
• Time-Termination - 1 hour maximum.
2. Freezer
Freezers use a time-initiated, heated defrost. The cabinet temperature is not displayed
during defrost, "dEF" is displayed in its place. It is preset at the factory to defrost 6 times
per day (once every 4 hours) for general conditions. However, if it is determined that
this interval does not suit the actual conditions the appliance is exposed to, the interval
can be changed. Before changing the time-initiated defrost setting, contact your local
Hoshizaki distributor or Hoshizaki Technical Support at 1-800-233-1940 for setting
recommendations. The defrost is a heated defrost, and therefore will have a tendency
to raise the cabinet temperature. When the defrost thermistor warms to 100°F (37.8°C),
defrost terminates. After defrost, there is a 5 minute delay before the compressor starts.
If necessary, adjust the defrost frequency as follows:
