12
V. Alarm Signals
If an error occurs, the alarm code and cabinet temperature are displayed in 2-second
intervals and an alarm sounds.
Alarm Signals
Alarm Code
Alarm
Sound
Problem
Reset Options
E1
3 beeps
every ten
seconds
High Temperature Alarm
Cabinet temperature has exceeded set
temperature by 10°F (5.6°C) for more
than 2 hours.
Press "RESET." If temperature has
returned to setpoint range, alarm will stop
and "E1" will clear.
If temperature is not back in range,
"RESET" will silence the alarm for 5
minutes. "E1" will continue to flash.
If obvious corrections do not bring
temperature back in range, call a
qualified service technician.
E2
4 beeps
every ten
seconds
Low Temperature Alarm
Cabinet temperature has remained below
setpoint by 8°F (4.4°C) for more than 1
hour.
Press "RESET." If temperature has
returned to setpoint range, alarm will stop
and "E2" will clear.
If temperature is not back in range,
"RESET" will silence the alarm for 5
minutes. "E2" will continue to flash.
If obvious corrections do not bring
temperature back in range, call a
qualified service technician.
E4
6 beeps
every ten
seconds
High Pressure Alarm
Compressor discharge pressure is
outside normal operating range. Pressure
switch has been triggered 3 or more
times in 1 hour.
Press "RESET." If pressure switch resets
automatically, alarm will stop and "E4"
will clear when pressure switch closes.
If switch trips 5 times in 1 hour,
compressor will be stopped and will
not re-start. A service technician must
be called. After the 5th pressure trip,
the alarm can be silenced for 1 hour by
pressing "RESET."
E6
8 beeps
every ten
seconds
High Voltage Alarm
Line voltage has been too high for
at least 10 seconds. To protect the
compressor, the compressor has shut
down.
Alarm automatically resets when
acceptable voltage is detected.
Press "RESET" to silence alarm for 5
minutes. If this alarm occurs frequently, it
is recommended that a qualified service
technician be called.
E7
9 beeps
every ten
seconds
Low Voltage Alarm
Line voltage has been too low for at least
10 seconds. To protect the compressor,
the compressor has shut down.
Alarm automatically resets when
acceptable voltage is detected.
Press "RESET" to silence alarm for 5
minutes. If this alarm occurs frequently, it
is recommended that a qualified service
technician be called.
