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DURING/AFTER POWER FAILURE
■
Display of chamber temperature during power failure
By depressing the buzzer stop key (BUZZER) during “power failure alarm”, the buzzer stop and the
chamber temperature is displayed on the temperature display for 5 seconds.
• Check the chamber temperature as appropriate by depressing the buzzer stop key (BUZZER) during
power failure.
<Important>
The battery for power failure alarm is a consumable part. Replace the battery about every 3 years. The
alarm would not be activated at power failure if the battery is not replaced regularly. Contact our sales
representative or agent for the replacement of battery.
■
Operation check after recovery from the power failure
The set value is memorized by nonvolatile memory. Accordingly, the freezer resumes the operation with
setting before power failure.
When the freezer is recovered from power failure with the chamber temperature higher than the preset
temperature, then the high temperature alarm is activated and the buzzer sounds and the remote alarm is
also activated. Please push the buzzer stop key (BUZZER) to silence buzzer and take appropriate
actions if needed.
REMOTE ALARM TERMINAL
The alarm is relayed to a remote location when a remote alarm device (commercially available) is
connected to the remote alarm terminal. Installation of a remote alarm device is recommended when the
unit is installed in an unattended location so that the operator of the unit is notified of the alarm.
■ Contact our sales representative or agent to arrange the installation of a remote alarm device.
The remote alarm terminal is installed at the back of the unit. The alarm is outputted from this terminal.
Contact capacity is DC 30 V, 2 A.
Contact output:
Terminal
Normal status
Abnormal status
Between COM. and N.O.
open
close
Between COM. and N.C.
close
open
Note:
• The remote alarm terminal will be in alarm mode when the power supply cord is unplugged because this
will be interpreted as a power failure.
• It is recommended to use standard signal and interface cables with a maximum length of 30 meters.
Summary of Contents for MDF-MU539D
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