18
ALARMS & SAFETY FUNCTIONS
This unit has the alarms and safety functions shown in Table 7, and also self diagnostic functions.
Table 7. Alarms and safety functions
Alarm & Safety
Situation
Indication
Buzzer
Safety operation
High temperature
alarm
If the chamber temperature is higher
than the temperature at which the
high temperature alarm is activated.
Alarm lamp is flashed.
Digital temperature
indicator is flashed.
Intermittent tone with
15 minutes delay.
Remote alarm with 15
minutes delay.
Low temperature
alarm
If the chamber temperature is lower
than the temperature at which the
low temperature alarm is activated.
Alarm lamp is flashed.
Digital temperature
indicator is flashed.
Intermittent tone with
15 minutes delay.
Remote alarm with 15
minutes delay.
Power failure alarm
In the case of power failure.
When power switch is turned OFF.
When the power to the unit is
disconnected.
Alarm lamp is flashed.
Intermittent tone
Remote alarm.
Auto-return
When there is no key pressing in
each setting mode for 90 seconds.
Chamber temperature is
displayed.
-----
Finishing of each
setting mode.
Key lock
When the key lock is “ON”.
-----
-----
Change of setting is
disable.
Thermal sensor
abnormality
If the thermal sensor is disconnected.
Alarm lamp is flashed.
E01 and chamber temp.
are displayed alternately.
Intermittent tone
Remote alarm.
Continuous running.
If the thermal sensor is short-circuited.
Alarm lamp is flashed.
E02 and chamber temp.
are displayed alternately.
Intermittent tone
Remote alarm.
Continuous running.
Battery switch
check
When the battery switch is OFF at the
time of alarm test.
E09 is flashed.
Intermittent tone
Remote alarm
Battery check
When about 3 years has passed with
power switch ON.
F-1 and chamber temp.
are displayed alternately.
----- -----
Note:
• The above power failure alarm is available when the battery switch is ON and the battery is charged.
If the battery switch is OFF or the battery is discharged, only the remote alarm is activated.
• The power failure alarm can be kept about 12 hours with the battery charged completely. 2-day
operation of the freezer is needed to charge the battery full.
• The chamber temperature is displayed for 5 seconds if the alarm buzzer stop key (BUZZER) is
depressed during the power failure alarm.
• The remote alarm is stopped by pressing alarm buzzer stop key (BUZZER) as the remote alarm is
operated in conjunction with the buzzer, except for the power failure alarm.
• After power failure, the operation is resumed with the condition before power failure since the
temperature setting and alarm temperature setting are memorized in a nonvolatile memory.
• The battery for power failure alarm is an article for consumption. It is recommended that the battery
will be replaced about every 3 years.
