EXXFIRE 750CNF - Operation

version 4.7.2 – July 10th, 2022 Firmware version V2.1.7 and higher
EXXFIRE Installation and Service Manual 81
7 OPERATION
The EXXFIRE® 750CNF/1500CNF/2250CNF systems perform the following functions during
operation:
• Displaying the system status on the User interface and handling user inputs (see
section 7.1)
• Smoke detection and raising an Alarm in case the smoke level exceeds the threshold
values related to the selected sensitivity level (see section 0)
• Monitoring of the Manual Activation Button (MAB) input and raising an Alarm in case
the MAB is activated or raising a Fault condition in case the MAB input shows
unexpected values (see section 7.4)
• Monitoring of the Door Switch (DSW) input and inhibiting fire extinguishing in case the
DSW inputs indicates an open door or raising a Fault condition in case the MAB input
shows unexpected values (see section 7.5)
• Fire extinguishing in case of an Alarm by releasing the nitrogen gas from the Cool Gas
Generators (CGG’s) (in case gas release is not inhibited, e.g. by an open door) (see
section 7.7)
• Flow monitoring for the aspiration system and raising a fault condition in case the flow
limit levels are exceeded; the flow limit values are determined during the
Commissioning procedure, typically performed during system installation (see section
0)
• Monitoring of power supply and battery backup system and raising a fault condition in
case of loss of mains power or any problem with the power supply or battery (see
section 7.10)
• Monitoring of the electrical connection to the CGG’s and raising a fault condition in
case the electrical connection to the CGG’s does not show the right value (see section
7.11)
• Monitoring of the communication between connected systems in case multiple systems
are connected via the RS485 bus and raising a fault condition in case of a
communication problem over the RS485 bus (see section 0)
• Monitoring of service intervals and raising a fault condition in case the system needs
servicing (see section 7.13)
• Monitor code execution on the microcontroller, the system fault status LED and fault
code displays a problem with code execution (see section 7.14)
• Logging of data to an SD card (see section 7.15)