Adjusting The Setpoint Temperature; Alarm Codes; Defrost - Hoshizaki HUR40A-D Instruction Manual

3) Press and hold both the
The cabinet temperature will be displayed using the newly saved temperature scale.
4) Affix the "°C" label supplied with the unit to the display panel, covering "°F" but not the
display window.
Note: The cabinet temperature is updated every 30 seconds.

2. Adjusting the Setpoint Temperature

The setpoint temperature is the temperature at which the compressor turns on. To set the
setpoint temperature, follow the steps below.
1) Press the button to display the current setpoint temperature.
2) To change the setpoint, press and hold the
down button to raise or lower the setpoint.
Freezer
(Door Unit)
Freezer
(Drawer Unit)
Refrigerator
(auxiliary
code Q5 and
before)
Refrigerator
(auxiliary
code Q6 and
later)
3) After 10 seconds, the new setpoint will be saved automatically.
Note: For freezers with doors, the temperature differential for the compressor to turn off is
6.3°F (3.5°C) below the setpoint. For freezers with drawers, the temperature
differential for the compressor to turn off is 3.6°F (2.0°C) below the setpoint. For
refrigerators, it is 4.5°F (2.5°C) below the setpoint for auxiliary code Q5 and before
and 3.6°F (2.0°C) below the setpoint for auxiliary code Q6 and later.

3. Alarm Codes

See the troubleshooting section for an explanation of the alarm codes.

4. Defrost

This unit is preset at the factory to defrost every 6 hours for general conditions, the first
defrost occurring 6 hours after power to the unit is turned on. Note that the defrost is a
heated defrost, and therefore will have a tendency to raise the cabinet temperature.
Cabinet temperature is not displayed during defrost; "dF" is displayed in its place. Defrost
may be initiated manually by holding down the MANUAL DEFROST button for
5 seconds.
button and the
Allowable Setpoint Range
Fahrenheit Celsius
-13 to +19°F -25 to -7°C
-13 to +19°F -25 to -7°C
+21 to +53°F -6 to +12°C
unmarked, blank button for 5 seconds.
button while pressing the
Default
Fahrenheit Celsius
0°F -18°C
2°F -17°C
39°F 4°C
37°F 3°C
14
up or