2. Low Temperature Alarm (E2)
If the cabinet or rail temperature drops below the setpoint temperature by 9°F (5°C) or more for more than y hours, "E2" is displayed. The default value of y is "1" (1 hour). The value of y can be changed under "F4" on the service 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 area temperature reaches the upper setpoint temperature differential.
Possible Causes (for further details see "III.B. Service Chart")
•Ambient temperature is low.
•Trouble with the cabinet thermistor (black).
•Liquid line valve open.
•Evaporator fans not operating.
Power On
Setpoint Temperature and
Upper Setpoint Differential 0°F (0°C)
Lower Setpoint Temperature
Differential
E2 Alarm Temperature
9°F (5°C) below setpoint temp.
E2 Alarm Timer under 1 hour
E2 Alarm
Timer Reset
Temperature Display
E2 Alarm Reset
E2 Alarm
E2 Alarm Timer over 1 hour
E2
Blinking
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