Hoshizaki HWR68A(-D) User Manual

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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.

For information about switching the display between °F and °C, see "D..a) Switching 
the Display Between Fahrenheit and Celsius (F5)." 

To view the alarm history, 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."

) 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 
"F6" appears in the display window.

3) Press the 

 unmarked, blank button to display the alarm history. The alarms will be 

displayed in reverse chronological order (newest to oldest - up to 8 alarms). When "--" 
is displayed, you have reached the end of the alarm history and the display will begin 
again.
   

Note: The alarms are as follows:

4) To reset the alarm history, press and hold both the 

 unmarked, blank button and the 

MANUAL DEFROST button for 5 seconds.

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.

E1

High Temperature Alarm

E

Low Temperature Alarm

E3 

Defrost Alarm

E4

High Pressure Alarm

E7

Clogged Filter Alarm

E8

Defrost Temperature Sensor Malfunction Alarm

E9

Clogged Filter Sensor Malfunction Alarm

EA

EEPROM Write Error Alarm

ED

EEPROM Verification or Read Error Alarm