Hoshizaki rf28a 補足マニュアル

13

2) To change the setpoint, press and hold the 

 button while pressing the  

 up or 

 

down button. 

Refrigerator +21 to +54°F -6 to +12°C

37°F

3°C

-13 to +19°F

-25 to -7°C

0°F

-18°C

3) The new setpoint will be saved automatically 10 seconds after releasing the buttons.

Note: For refrigerators and freezers, the temperature differential for the compressor to 

turn off is -3.6°F (-2.0°C).

Press and hold both the 

 button and the  

 service button for 5 seconds to enter the 

settings and diagnostics menu. Press the MANUAL DEFROST button to scroll through 
the menu and the  

 service button at any point to view the current setting. Press the 

MANUAL DEFROST button to return to the menu screen. Press and hold both the

 

button and the 

 service button for 5 seconds to exit the setting mode and return to the 

temperature display.
Note: If there is no input for 60 seconds, the display will revert to the temperature display.

F0 Defrost Interval

1 to 12 hours in 1 hour increments

6

6

F2 Setpoint Temperature Differential 

(upper and lower)

0 to 6.3°F in increments of .9°F – upper
(0 to 3.5°C in increments of .5°C) 
-0.9 to -6.3°F in increments of .9°F – lower 
(-0.5 to -3.5°C in increments of .5°C) 

3.6, -3.6 °F

(2.0, -2.0 °C)

(decimal 

is not 

displayed)

3.6, -3.6 °F

(2.0, -2.0 °C)

(decimal 

is not 

displayed)

F3 High Temperature Alarm Delay 

Time (cabinet temperature)

0 to 180 minutes in 60 minute increments 
(0=0; 1=60; 2=120; 3=180 minutes)

2

2

F4 Low Temperature Alarm Delay 

Time (cabinet temperature)

0 or 60 minutes 
(0=0; 1=60 minutes)

1

1

F5 Temperature Display

Fahrenheit or Celsius

°F

°F

F6 Alarm History

Displays alarm history - maximum 8 
alarms

NA

NA

F7 Compressor Run Time

Displays run time between two most 
recent defrosts

NA

NA

F8 Not in Use

-

Flashes "--" 

and "00"

Flashes "--" 

and "00"

FA High Temperature Shutoff 

Temperature Setting (clogged 
filter thermistor)

149 to 167°F
(65 to 75°C)

163°F 

(73°C)

(for °F, only 
the last two 

digits are 

displayed 

and "-" 

flashes)

158°F 

(70°C)

(for °F, only 
the last two 

digits are 

displayed 

and "-" 

flashes)

Fb Not in Use

-

AL

AL