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
Note: The alarms are as follows:
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 |
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.
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