Alarm & Safety Functions - Sanyo MDF-U333 Instruction Manual

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
If the chamber temperature is higher
High temperature
than the temperature at which the
alarm
high temperature alarm is activated.
If the chamber temperature is lower
Low temperature
than the temperature at which the
alarm
low temperature alarm is activated.
In the case of power failure.
When power switch is turned OFF.
Power failure alarm
When the power to the unit is
disconnected.
When there is no key pressing in
Auto-return
each setting mode for 90 seconds.
Key lock When the key lock is "ON".
Thermal sensor If the thermal sensor is
Abnormality disconnected.
(for MDF-U537D,
upper chamber If the thermal sensor is
only) short-circuited.
Thermal sensor If the thermal sensor is
abnormality disconnected.
(MDF-U537D,
lower chamber
If the thermal sensor is
only)
short-circuited.
If the protective sensor for
Thermal sensor
compressor is disconnected.
abnormality
(MDF-U537, U537D
If the protective sensor for
only)
compressor is short-circuited.
If the thermal sensor for lower
Thermal sensor chamber is disconnected.
abnormality
(MDF-U537 only)
If the thermal sensor for lower
chamber is short-circuited.
Battery switch When battery switch is OFF at the
check time of alarm test.
In the case of failure of compressor
cooling fan motor.
Compressor temp. In the case of abnormal high
Abnormality (MDF- temperature due to the dust on the
U537, U537D only) condenser.
In the case of abnormal high
ambient temperature.
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. At the same time, the alarm stops.
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.
Situation
ALARM lamp is flashed.
Temperature indicator is
flashed.
ALARM lamp is flashed.
Temperature indicator is
flashed.
ALARM lamp is flashed.
Chamber temperature is
displayed.
ALARM lamp is flashed.
E01 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E02 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E03 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E04 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E05 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E06 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E07 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E08 and chamber temp. are
displayed alternately.
ALARM lamp is flashed.
E09 is flashed.
E10 and chamber temp. are
displayed alternately.
22
Indication Buzzer
Intermittent tone with
15 minutes delay.
Intermittent tone with
15 minutes delay.
Intermittent tone
-----
----- -----
Intermittent tone
Intermittent tone
Intermittent tone
Intermittent tone
Intermittent tone
Intermittent tone
Intermittent tone
Intermittent tone
Safety operation
Remote alarm with 15
minutes delay.
Remote alarm with 15
minutes delay.
Remote alarm.
Finishing of each
setting mode.
Change of setting is
disable.
Remote alarm.
Continuous running.
Remote alarm.
Continuous running.
Remote alarm.
Continuous running.
Remote alarm.
Continuous running.
Remote alarm.
Normal operation.
Remote alarm.
Normal operation.
Remote alarm.
Remote alarm.
Compressor stops
running when the temp
o
reaches about 100 C.
Electromagnetic valve
1, 2 and compressor
stop.
(MDF-U537D only)