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About Alarms
Installation of an Alarm System
This refrigeration unit has a variety of protection devices for securing safety. When the ground fault protector or other
protection device is activated, and the alarm system or temperature control system is insufficient, cooling operation is
stopped for many hours thereby damaging the food items.
To enable prompt actions at such time, an alarm system or temperature control system should be considered at the
time of plan development.
External Alarms
This refrigeration unit is capable of delivering alarm output during abnormality (no voltage contact: contact capacity
Maximum 250 V 3 A).
During unit abnormality, the alarm output between the External alarm terminal base 1 and base 2 is turned ON
(continuity between the contacts). Connection of an external alarm circuit (local wiring) is recommended. External
alarm power should be furnished separately from the refrigeration unit power.
Detail of abnormality alarm content is shown in the table below.
Caution
Use shielded cable suitable for the voltage of the external power supply used.
External alarm terminal base
①
BZ
②
Buzzer Buzzer stopping switch
EN - 38
External power source
Maximum 250 V 3 A
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