version 4.7.2 – July 10th, 2022 Firmware version V2.1.7 and higher
EXXFIRE Installation and Service Manual 93
When the system is in operation and the DSW is opened the Fault state is entered and the FAULT
LED on the UI panel will go ON, the Door Open fault code (EE) will be shown on the 4-digit display of
the UI panel and the Fault relay will be activated, resulting in the NC contacts of this relay to close.
The buzzer will go on (intermittent sound signal). The buzzer can be muted by pressing the MUTE
button on the UI panel.
The effect of the Open Door fault status is that fire suppression will be blocked: in case of an Alarm
condition the system will not release its gas; instead, the system will remain in an endless
countdown, indicated by a continuous beep and the ALARM LED on; at the same time the Door
Open Fault condition remains active (FAULT LED on and Fault code EE displayed).
This condition can be ended in different ways:
1. By closing the door(s) so that the DSW is closed: if the Alarm condition is still active, this will
start the fire extinguishing (see section 7.7)
2. By resetting the Alarm condition (see section 0); this will only be successful when the smoke
level has dropped below the Alarm level and/or the MAB has been reset. After the Alarm
condition has been reset, the door can be closed; there will be no fire extinguishing.
3. By first putting the system in TRIGGER DISABLED (see section 7.6) and then closing the
door(s) so that the DSW is closed: in this case the system will stay in Alarm condition but the
gas will not be released as long as the fire extinguising is disabled. A RESET ALARM/GAS
RELEASED procedure (see section 0) can then be performed in order to reset the Alarm
condition.
DISABLE Fire Extinguishing
The EXXFIRE® 750CNF/1500CNF/2250CNF systems provide three different disable functions:
TRIGGER DISABLE operation:
1. Put the key switch in SERVICE position
2. Press the DISABLE button on the UI panel
3. The DISABLED LED on the UI panel will switch ON and display dd11 on the alpha numeric
display to indicate that the system is in TRIGGER DISABLED mode; fire extinguishing is
disabled in this mode, but all other functions will work normally:
a. The smoke detection function will continue working in TRIGGER DISABLED mode,
allowing activating the Alarm condition; however, the system will not release the
gas.
b. Activating the MAB will activate the Alarm condition; however, the system will not
release the gas.
c. The relay outputs Alarm and Fault will function normally in TRIGGER DISABLED
mode.
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