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

If the chamber temperature is higher

 

 

 

than the temperature at which the

ALARM lamp is flashed.

 

 

alarm

Intermittent tone with

Remote alarm with 15

high temperature alarm is activated.

 

Temperature indicator is

 

If the chamber temperature is lower

15 minutes delay.

minutes delay.

Low temperature

flashed.

than the temperature at which the

 

 

alarm

 

 

 

low temperature alarm is activated.

 

 

 

 

 

 

 

Power failure alarm

When the power to the unit is

ALARM lamp is flashed.

Intermittent tone

Remote alarm.

disconnected.

 

 

 

 

Filter check

When the condenser filter is clogged.

Filter check lamp lights.

-----

-----

Battery check

When about 2.8 years has passed with

Battery check lamp lights.

-----

-----

 

power switch ON.

 

 

 

Auto-return

When there is no key pressing in

Chamber temperature is

-----

Finishing of each

each setting mode for 90 seconds.

displayed.

 

setting mode.

 

 

Key lock

When the key lock is “ON”.

-----

-----

Change of setting is

disable.

 

 

 

 

 

 

ALARM lamp is flashed.

 

Remote alarm.

 

If the thermal sensor is disconnected.

E01 and chamber temp. are

Intermittent tone

Unit keeps continuous

 

 

displayed alternately.

 

running.

 

 

ALARM lamp is flashed.

 

Remote alarm.

 

If the thermal sensor is short-circuited.

E02 and chamber temp. are

Intermittent tone

Unit keeps continuous

 

 

displayed alternately.

 

running.

 

 

ALARM lamp is flashed.

 

Remote alarm.

 

If the cascade sensor is disconnected.

E03 and chamber temp. are

Intermittent tone

 

Unit keeps running.

 

 

displayed alternately.

 

 

 

 

 

 

 

ALARM lamp is flashed.

 

Remote alarm.

 

If the cascade sensor is short circuited.

E04 and chamber temp. are

Intermittent tone

 

Unit keeps running.

Sensor abnormality

 

displayed alternately.

 

 

 

 

 

ALARM lamp is flashed.

 

 

 

 

 

 

 

If the filter sensor is disconnected.

E05 and chamber temp. are

Intermittent tone

Remote alarm.

 

 

displayed alternately.

 

 

 

 

ALARM lamp is flashed.

 

 

 

If the filter sensor is short-circuited.

E06 and chamber temp. are

Intermittent tone

Remote alarm.

 

 

displayed alternately.

 

 

 

If the ambient temperature sensor is

ALARM lamp is flashed.

 

 

 

E07 and chamber temp. are

Intermittent tone

Remote alarm.

 

disconnected.

 

displayed alternately.

 

 

 

 

 

 

 

If the ambient temperature sensor is

ALARM lamp is flashed.

 

 

 

E08 and chamber temp. are

Intermittent tone

Remote alarm.

 

short-circuited.

 

displayed alternately.

 

 

 

 

 

 

Battery switch

When the battery switch is OFF during

ALARM lamp is flashed.

-----

-----

check

alarm test.

E09 is flashed.

 

 

Note:

When the operation is started in high ambient temperature, the filter check lamp is sometimes flashed. In this case, the lamp is off automatically when the chamber temperature is getting lower.

The freezer resumes the operation after power failure with the temperature setting before power failure as the chamber temperature setting and alarm temperature setting are memorized in the volatile memory.

The chamber temperature is displayed for 5 seconds by pressing BUZZER key during power failure alarm. Then the buzzer is silenced. The ALARM lamp keeps flashing.

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Sanyo MDF-U32V instruction manual Alarms & Safety Functions, Alarms and safety functions

MDF-U32V specifications

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