Operation
February 2011 4-14 P/N 06-237041-001
4-10.3.3 ALARM DISPLAY LIMITATION
The FenwalNET 8000-ML control unit can display a maximum of 64 active alarm messages by
manually scrolling through them. All alarms in excess of 64 will be processed by the control
unit even though they are not displayed, and all outputs will be activated as programmed in the
control unit’s application program.
The LCD will temporarily display the following message when a manual scroll operation goes beyond
the 64th alarm message and then will return to the first alarm message (as shown in Figure 4-23):
Figure 4-25. Alarm Events Buffer Full Message
The normal control unit actions will also occur when any non-displayed alarm condition is reported.
These actions include:
• Logging of the alarm event
• Activation of point- or group-specific and general-alarm outputs, including previously-silenced
outputs.
4-10.3.4 HOW TO RESET THE CONTROL UNIT AFTER AN ALARM CONDITION
The FenwalNET 8000-ML control unit will not reset and resume normal operations unless it has
received Alarm Off messages from all previously alarmed initiating devices. This means, for example,
that:
• All automatic initiating devices such as smoke detectors are measuring obscuration levels below
their programmed alarm thresholds and have been reset
• All manual stations have been reset and are in non-activated positions
• Sprinkler system water has been shut off and all waterflow switches have stopped reporting
discharge conditions
Press the <SYSTEM RESET> Key to resume normal operations after all alarm-initiating devices
have transmitted Alarm Off messages.
Note: It is possible that one or more trouble and/or supervisory messages will be reported after the
system-reset operation is performed. For example, a special extinguishing system may need
to be recharged or a sprinkler gate valve may be in an off-normal position. Servicing
personnel must take prompt action to restore the system to normal operating conditions.
MORE THAN 64 ALARMS
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