In principle the control unit is the brain of system: it monitors the signals of the detectors and activates the fire extinguishers extremely fast.

Additionally it supervises the detectors and fire extinguisher continuously.

On top of that there is an interface on the control unit for an external test equipments which allows the check of the complete system in seconds.
Availibility and faults are shown on an integrated or seperate LED display via signal lights or in plain text - this means the crew is up to date at a glance

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