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.
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. Defrost key is
ineffective.
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.
Power failure alarm
(MPR-48B1
installed)
In the case of power failure.
When the power to the unit is
disconnected.
Alarm lamp is flashed.
Intermittent tone
Remote alarm.
Battery check
(MPR-48B1
installed)
When about 3 years has passed with
the power cord is connected to the
outlet.
F1 and chamber temp. are
displayed alternately.
Battery switch
check
(MPR-48B1
installed)
When battery switch is OFF at the
time of alarm test.
Alarm lamp is flashed.
E09 is flashed.
----- Remote
alarm.
The above power failure alarm, battery check and battery switch check are available when the battery
mounting box (optional component) is installed. The operation is as follows:
• The power failure alarm is available when the battery switch is ON and the battery is charged. Only
the remote alarm is activated when the battery switch is OFF or the battery is discharged.
• 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 with the battery switch ON.
• The remote alarm is stopped by pressing the alarm buzzer stop key (BUZZER) as the remote alarm
is operated in conjunction with the buzzer, except for the power failure alarm.
• During power failure, the alarm buzzer is stopped by pressing the alarm buzzer stop key (BUZZER)
but the alarm lamp keeps blinking.
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.
Summary of Contents for MDF-MU300H
Page 2: ......
