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4
ALARMS
4.1 Introduction
The active alarms generated by the application software can activate a relay, if suitably configured.
The relay is switched on if:
- there is an active alarm;
- there is an alarm that has not been reset;
The relay will be switched off if:
- there are no active alarms.
4.1.1
Automatic/Manual procedure and alarm reset
The holding of the alarms takes place considering a time window of 1 hour. The hour is divided into 60 intervals of 1 minute
each.
The window is sliding as regards the alarm event and always covers the last hour. During the interval of one minute, if an
occurrence is detected, this time interval is considered active.
"ACT" is assigned to the active interval to record the event. The sum of the active intervals in the last hour allows the number
of events/alarms per hour to be calculated.
If the sum of the active intervals does not exceed the respective threshold value of occurrences/hour, they are deleted.
Two examples are given below with threshold of occurrences/hour = 5
In the first example, since the number of active intervals is 3, which is lower than the threshold of occurrences/hour set to
5, the events are deleted.
In the second example, the number of active intervals is 7, and therefore exceeds the threshold of occurrences/hour set to
5. In this case, the alarm becomes a manual reset alarm and therefore the work of technical personnel will be necessary.
Even if the alarm is no longer active, only a manual reset will cause the deletion of the alarm from the display and from the
list of active alarms.
Alarms that merely notify, that is, no output is energized/de-energized are also managed in the application. These are called
WARNINGS.
Daikin R32 Rooftops UATYA-B
ESIE21-02 – 2021.03
4 Alarms
Service manual
89
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