Hoshizaki HUR40A(-D) - Manual (Page 36)

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b. Low Temperature Alarm (E2)
If the cabinet temperature drops below the setpoint temperature by 9°F (5°C) or more for
more than y minutes, "E2" is displayed. The default value of y is "1" (1 hour). The value
of y can be changed under F4 on the Settings and Diagnostics Menu. (0=No delay; 1=1
hour)
Note:
• The low temperature alarm timer starts once the cabinet temperature drops 9°F
(5°C) below the setpoint temperature.
• The low temperature alarm feature operates even during defrost.
Reset Options
The alarm will automatically reset once the cabinet temperature reaches the upper setpoint
temperature differential.
Possible Causes
• Ambient temperature is low.
• Trouble with the cabinet thermistor (black).