Sanyo MDF-U333, MDF-U537 instruction manual Alarms & Safety Functions, Alarms and safety functions

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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

If the chamber temperature is higher

ALARM lamp is flashed.

Intermittent tone with

Remote alarm with 15

than the temperature at which the

Temperature indicator is

alarm

15 minutes delay.

minutes delay.

high temperature alarm is activated.

flashed.

 

 

 

Low temperature

If the chamber temperature is lower

ALARM lamp is flashed.

Intermittent tone with

Remote alarm with 15

than the temperature at which the

Temperature indicator is

alarm

15 minutes delay.

minutes delay.

low temperature alarm is activated.

flashed.

 

 

 

 

In the case of power failure.

 

 

 

Power failure alarm

When power switch is turned OFF.

ALARM lamp is flashed.

Intermittent tone

Remote alarm.

When the power to the unit is

 

 

 

 

 

disconnected.

 

 

 

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.

 

 

 

 

Thermal sensor

If the thermal sensor is

ALARM lamp is flashed.

 

Remote alarm.

E01 and chamber temp. are

Intermittent tone

Abnormality

disconnected.

Continuous running.

displayed alternately.

 

(for MDF-U537D,

 

 

 

 

ALARM lamp is flashed.

 

 

upper chamber

If the thermal sensor is

 

Remote alarm.

E02 and chamber temp. are

Intermittent tone

only)

short-circuited.

Continuous running.

displayed alternately.

 

 

 

 

 

Thermal sensor

If the thermal sensor is

ALARM lamp is flashed.

 

Remote alarm.

E03 and chamber temp. are

Intermittent tone

abnormality

disconnected.

Continuous running.

displayed alternately.

 

(MDF-U537D,

 

 

 

 

ALARM lamp is flashed.

 

 

lower chamber

If the thermal sensor is

 

Remote alarm.

E04 and chamber temp. are

Intermittent tone

only)

short-circuited.

Continuous running.

displayed alternately.

 

 

 

 

 

 

If the protective sensor for

ALARM lamp is flashed.

 

 

Thermal sensor

E05 and chamber temp. are

 

 

compressor is disconnected.

 

Remote alarm.

abnormality

displayed alternately.

Intermittent tone

 

(MDF-U537, U537D

If the protective sensor for

ALARM lamp is flashed.

Normal operation.

 

only)

compressor is short-circuited.

E06 and chamber temp. are

 

 

 

displayed alternately.

 

 

 

 

 

 

 

If the thermal sensor for lower

ALARM lamp is flashed.

 

 

 

E07 and chamber temp. are

 

 

Thermal sensor

chamber is disconnected.

 

Remote alarm.

displayed alternately.

Intermittent tone

abnormality

 

 

ALARM lamp is flashed.

Normal operation.

(MDF-U537 only)

If the thermal sensor for lower

 

E08 and chamber temp. are

 

 

 

chamber is short-circuited.

 

 

 

displayed alternately.

 

 

 

 

 

 

Battery switch

When battery switch is OFF at the

ALARM lamp is flashed.

Intermittent tone

Remote alarm.

check

time of alarm test.

E09 is flashed.

 

 

 

In the case of failure of compressor

 

 

Remote alarm.

 

 

 

Compressor stops

 

cooling fan motor.

 

 

 

 

 

running when the temp

Compressor temp.

In the case of abnormal high

 

 

E10 and chamber temp. are

Intermittent tone

reaches about 100oC.

Abnormality (MDF-

temperature due to the dust on the

displayed alternately.

Electromagnetic valve

U537, U537D only)

condenser.

 

 

 

1, 2 and compressor

 

In the case of abnormal high

 

 

 

 

 

stop.

 

ambient temperature.

 

 

 

 

 

(MDF-U537D only)

 

 

 

 

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.

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Contents MDF-U333 MDF-U537 MDF-U537D Contents Symbol shows Precautions for Safe OperationMay cause bad effect on your health or environment Water Damage to the unit Page Environmental Conditions Freezer Components Back side MDF-U537D Control panel and keypadInstallation site InstallationFix the unit InstallationAdjust the leveling feet Remove the packaging materials and tapesCase of top location Temperature recorderOptional Components Optional Components Optional Components Optional Components Model MDF-U537D Remote Alarm Terminal Chamber temperature Temperature SettingKey lock function Alarm temperature setting Alarms and safety functions Alarms & Safety FunctionsSetting of Alarm Resume Time Defrosting Routine MaintenanceCleaning of cabinet Cooling is poor Trouble ShootingDisposal of Unit Chamber is not cooled at allMDF-U537D SpecificationsMDF-U537 PerformanceMDF-U333 Safety check sheet 7FB6P101288007 5 April

MDF-U333, MDF-U537 specifications

Sanyo's MDF-U537 and MDF-U333 are high-performance laboratory freezers designed for the secure storage of sensitive biological samples, medical supplies, and other critical materials. These models are renowned for their reliability, energy efficiency, and advanced technologies.

The Sanyo MDF-U537 offers a temperature range of -20°C to -86°C, making it versatile for various applications, including long-term storage of vaccines, enzymes, and other temperature-sensitive materials. With a capacity of 528 liters, it is spacious enough to accommodate numerous samples while maintaining organized storage. This model features a dual-layer door system that ensures minimal temperature fluctuations when accessing stored items.

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