NOTICE
Damage due to alarm release!
The alarm can be released during installation/start-up of an additional electrical
device. This can cause significant property damage.
● Shut down external system controllers (e.g. activation of further extinguishing
systems or transmissions via floating contacts) prior to connecting additional
electrical devices.
● Block the system prior to the function test for additional electrical devices. To
this end, switch the blocking switch to “Agent disconnect [blocked]”. The yellow
“Failure” LED lights up continuously.
● Check that no alarm message (red LED “Extinguishing system triggered”) is
displayed prior to removing the blocking. The extinguishing process is other-
wise initiated immediately.
Ⅰ
Agent connect [not blocked]
Ⅱ
Agent disconnect [blocked]
1 LED "Failure"
2 LED "Extinguishing system triggered"
6.3.1
Potential-free contacts
NOTICE
Malfunction due to interrupted relay contacts!
When using relay contacts for external controllers, the connections to the relay con-
tacts can be interrupted when removing the system from the protected cabinet. As
a result, there is a danger of unwanted switching states arising from, e.g. safety
functions, which use closed circuits via relay break contacts in normal state.
● Do not interrupt the connections to the relay contacts when removing the
system from the protected cabinet.
Relay 1
Pre-alarm 1 (NO)
A fire detector has been activated. The relay
remains triggered until the upper
[Reset]
button is
actuated.
Relay 2
Fire alarm (NO)
The second fire detector has released or a manual
call point was actuated. The relay remains triggered
until the upper
[Reset]
button is actuated.
Fig. 46: Blocking switch
Fig. 47: LEDs
Assembly and installation
Operating Instructions / DET-AC III Master / 916005 / 11-2022 / en_US
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