18
ALARMS & SAFETY FUNCTIONS
This unit has the alarms and safety functions shown in Table 6, and also self diagnostic functions.
Table 6 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.
Battery switch
check
When battery switch is OFF at the
time of alarm test.
Alarm lamp is flashed.
E09 is flashed.
Intermittent tone
Remote alarm.
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.
Ambient sensor
abnormality
If the ambient temperature sensor is
disconnected.
Alarm lamp is flashed.
E03 and chamber temp.
are displayed alternately.
Intermittent tone
Remote alarm.
If the ambient temperature sensor is
short-circuited.
Alarm lamp is flashed.
E04 and chamber temp
are displayed alternately.
Intermittent tone
Remote alarm.
Compressor
protection sensor
abnormality
If the compressor protection
temperature sensor is disconnected.
Alarm lamp is flashed.
E05 and chamber temp.
Are displayed alternately.
Intermittent tone
Remote alarm.
Normal operation.
If the compressor protection
temperature sensor is short
circuited.
Alarm lamp is flashed.
E06 and chamber temp.
Are displayed alternately.
Compressor temp.
Abnormality
In the case of failure of compressor
cooling fan motor.
In the case of abnormal high temp.
due to the dust on the condenser.
In the case of abnormal high
ambient temperature.
E10 and chamber temp. are
displayed alternately.
Intermittent tone
Remote alarm.
Compressor stops
running when the temp
reaches about 80
o
C.
Battery check
When about three years has passed
with power switch ON.
_F1 and chamber temp.
are displayed alternately.
----- Information
only
Fan motor check
When about six years has passed
with power switch ON.
_F2 and chamber temp.
are displayed alternately.
----- Information
only
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 twelve 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 five seconds if the alarm buzzer stop key (BUZZER) is
depressed during the power failure alarm. At the same time, the alarm buzzer stops.
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 following directions are the information of the part replacement (it is recommendation). This is not
a trouble.
a) The battery for power failure alarm is an article for consumption. It is recommended that the battery
will be replaced about every three years. Contact our sales representative or agent at the time of
replacement of the battery for recycling.
b) Fan motors are expendable supplies. Replace it for about every six years. Contact our sales
representative or agent at the time of replacement of the fan motor.
