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2. Alarm Code Appears in Display
If an error occurs, the alarm code and cabinet temperature are displayed in 1-second
intervals. When an error occurs, check the error code and follow the instructions below. If
more than one abnormal condition exists, alarm codes will be displayed in order of
priority.
Alarm Code Problem Notes
E1
High Temperature Alarm
Cabinet temperature has exceeded set
temperature by 18°F (10°C) for more than x
minutes. The default value of x is "2" (120
minutes).
When temperature returns to setpoint range,
alarm code “E1” will clear.
If temperature is not back in range, and obvious
corrections do not bring temperature back in
range, call a qualified service technician.
E2
Low Temperature Alarm
Cabinet temperature has remained below
setpoint by 9°F (5°C) for more than y minutes.
The default value of y is "1" (60 minutes).
When temperature returns to setpoint range,
alarm code “E2” will clear.
If temperature is not back in range, and obvious
corrections do not bring temperature back in
range, call a qualified service technician.
E3
Defrost Alarm
Defrost has taken longer than 1 hour. Control
board has terminated defrost.
Call a qualified service technician.
Note that E3 may alternate with "dF" instead of
the temperature.
E4
High Pressure Alarm
Compressor discharge pressure is outside
normal operating range. Pressure switch has
been triggered 5 or more times in 1 hour.
Condenser filter may need cleaning.
Clean filter if necessary. Allow time for pressure
switch to react, then turn power off and back on
again to reset.
If switch trips 5 times in 1 hour, and the above
steps do not clear the alarm code, call a
qualified service technician.
E7
Clogged Filter Alarm
Condenser temperature is outside of normal
operating range. Condenser filter needs
cleaning.
Clean filter. Allow time for sensor to react, then
turn power off and back on again to reset.
If this alarm occurs frequently, it is
recommended that a qualified service technician
be called.
E8
Defrost Temperature Sensor Malfunction Alarm
Defrost temperature sensor has failed.
Call a qualified service technician. After
replacing sensor, alarm will reset.
E9
Clogged Filter Sensor Malfunction Alarm
Clogged filter sensor has failed.
Call a qualified service technician. After
replacing sensor, alarm will reset.
EA
EEPROM Write Error Alarm
Control board is defective.
Call a qualified service technician.
ED
EEPROM Verification or Read Error Alarm
Control board is defective.
Call a qualified service technician.
Alarm Si
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