MT4061E Rev.2
15/10/2019
Pagina 27 di 45
Fig. 3.2.1.e) FAULT details screen
TEST/MAINTENANCE
This state is meant for testing and maintenance purpose. This testing function requires
an operation sequence and can be activated for each detector being connected.
An user with the OPERATOR or MAINTENANCE level cannot put under
TEST/MAINTENANCE more than 50% of the system’s channels and outputs.
The signals from channels under TEST will be displayed but will not be considered, in
the way that no alarm will be triggered even though the alarm thresholds are being
exceeded.
In the same way, the relays under TEST will not be activated, even if an alarm event
associated is taking place while the relay is in TEST/MAINTENANCE mode.
EXCEPTION: In case the system just includes one channel only, it will be possible to
put that channel under test.
The same principle applies in the case when just one single output is defined. That
output can be put under test.
UNSET
The state is useful for virtually excluding single detectors or parts of the system, without
physically interrupting the connection.
The UNSET condition may be activated for each channel or part of the system.
In the same way as for TEST/MAINTENANCE mode, a user with OPERATOR or
MAINTENANCE level cannot UNSET more than 50% of the system’s channels and
relays.
The only exception is the ENGINEER level, which may UNSET the whole system if
necessary.
