Arctiko CRYO 170, Operating Instructions Manual, Page: 15 / 40

14
Alarm function
This unit alarms with a buzzer, will sound, when the inner temperature of a freezer increases or
power goes out, in order to protect stored items. Furthermore, it has the Voltage free terminal to
remote alarm system. All is equipped with On/Off switches, so use it as necessary.
The temperature increase alarm sounds under the following conditions.
• AL-1 switch is ON
• The inner temperature of a freezer (PV) is +15°C compared with
the set point temperature (SV)
In case of the first use, the alarm will sound, caused to the inner temperature of a
freezer is too high. After reaching stable temperature, turn on the AL-1 switch.
The Power failure alarm sounds under the following conditions.
• AL-1 switch is ON
• Occurrence of Power failure or equivalent incident (plug is pulled out of the wall
socket or the power switch is off)
An alarm buzzer sounds for about 48 hrs. continuously even when an electric current
is not applied. Limited to the case of sufficient charging (after operation for min. 5
days). The life of a battery is approx. 3 years.
The remote alarm signal output will be activated under the following conditions.
• REMOTE switch is ON (output even when AL-1 switch is OFF)
• The Alarm delay is the same as the high temperature alarm and power failure.
• The remote alarm connector of the external alarm is Off (open) when no Alarm is
present, when there is an Alarm activated, the contact will be closed.
Where there is an electrical anomaly in the double cooling system. Breakdown of the
Compressor, AL-2 lamp (red) turns on. In addition, where AL-1 switch is ON, a buzzer
sounds interworking with AL-2 lamp.
When only one cooling system is running, the Temperature in the Freezer can be kept
under -130°C.
The abnormal fan motor runs under the following condition.
In case of the insufficient rotation or stop of a fan motor, an alarm buzzer will sound and
AL-2 lamp (red) will be on.
Where the inner temperature of a freezer goes above -130
°
C and the LN2 BACKUP
SYSTEM switch is ON, an alarm buzzer will sound and simultaneously LN2 are sprayed
into the freezer.