Hoshizaki HUR40A(-D) - Manual (Page 30)

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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.
f) Temperature Display Scale (F5)
For information about switching the display between °F and °C, see "D.2.a) Switching
the Display Between Fahrenheit and Celsius (F5)."
g) Alarm History (F6)
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."
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
"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.
Alarm Code Description
E1 High Temperature Alarm
E2 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