Hoshizaki HUR40A(-D) - Manual (Page 28)

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3) Press the unmarked, blank button to display the current setting. Press the up or
down button to increase or decrease the defrost termination temperature.
Note: The defrost termination temperatures can be adjusted within the following ranges:
• Refrigerator: 59 to 68°F (15 to 20°C) in one degree increments
• Freezer: 41 to 68°F (5 to 20°C) in one degree increments
4) Press the unmarked, blank button to save the setting.
5) Press the MANUAL DEFROST button to return to the menu screen. Press and hold
both the button and the unmarked, blank button for 5 seconds to exit the setting
mode and return to the temperature display.
6) If a jumper was present between connector K151 pins 7 and 8, reconnect it after all
setting and diagnostic work is complete.
c) Setpoint Temperature Differential (F2)
To change the differential, follow the steps below.
1) Make sure the jumper is removed between connector K151 pins 7 and 8 on the control
board. Otherwise you will not be able to access this setting. For details, see "D.1.
Gaining Access to Settings and Diagnostics."
2) Press and hold both the button and the unmarked, blank button for 5 seconds.
"F0" should appear in the display window. Press the MANUAL DEFROST button until
"F2" appears in the display window.
3) Press the unmarked, blank button to display the current + setting (the decimal
between the digits is not shown). Press the up or down button to increase or
decrease the + (plus) differential in .9°F increments.
Note:
• Both the + and - values can be adjusted between 0.0 and 6.3°F in .9°F increments
(0.0 to 3.5°C in .5°C increments).
• You cannot set both + and - to 0.0.
4) Press the unmarked, blank button to save the + setting and move to the - (minus)
differential setting.
5) Press the up or down button to increase or decrease the - (minus) differential in
.9F increments.
Note:
• Both the + and - values can be adjusted between 0.0 and 6.3°F in .9°F increments
(0.0 to 3.5°C in .5°C increments).
• You cannot set both + and - to 0.0.
6) Press the unmarked, blank button to save the - (minus) setting. The - (minus) sign
will turn off and the display will change to the + (plus) differential setting.
7) Press the MANUAL DEFROST button to return to the menu screen. Press and hold
both the button and the unmarked, blank button for 5 seconds to exit the setting
mode and return to the temperature display.
8) If a jumper was present between connector K151 pins 7 and 8, reconnect it after all
setting and diagnostic work is complete.