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ALARMS & SAFETY FUNCTIONS
This unit has the alarms and safety functions shown in Table 5, and also self diagnostic functions.
Table 5 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.
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.
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.
If the thermal sensor is disconnected.
ALARM lamp is flashed.
E01 and chamber temp. are
displayed alternately.
Intermittent tone
Remote alarm.
Continuous running.
Thermal sensor
abnormality
If the thermal sensor is short-circuited.
ALARM lamp is flashed.
E02 and chamber temp. are
displayed alternately.
Intermittent tone
Remote alarm.
Continuous running.
If the protective sensor for compressor
is disconnected.
ALARM lamp is flashed.
E03 and chamber temp. are
displayed alternately.
Intermittent tone
Remote alarm.
Normal operation.
Thermal sensor
abnormality
(MDF-436 only)
If the protective sensor for compressor
is short-circuited.
ALARM lamp is flashed.
E04 and chamber temp. are
displayed alternately.
Intermittent tone
Remote alarm.
Normal operation.
Battery switch
check
When the battery switch is OFF at the
time of alarm test.
E09 is flashed. Intermittent tone Remote alarm.
Compressor temp.
abnormality
(MDF-436 only)
In the case of failure of compressor
cooling fan motor.
In the case of abnormal high
temperature due to the dust on the
condenser.
In the case of abnormal high ambient
temperature.
E10 is flashed. Intermittent tone
Remote alarm.
Compressor stops
running.
Note:
1. 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.
2. 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.
3. The chamber temperature is displayed for 5 seconds if the BUZZER key is depressed during the power
failure alarm. After that, the alarm stops and the alarm lamp blinks.
4. The remote alarm is silenced by pressing BUZZER key as the remote alarm is operated in conjunction
with the buzzer, except for the power failure alarm.
5. 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.