TROUBL: NFS2-640 Trouble Code | Fire Alarm Resource Center
TROUBL
trouble
Notifier NFS2-640
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What This Code Means
The system enters System Trouble mode when the control panel detects an electrical fault or a trouble condition on a supervised circuit or module.
Common Causes
1Electrical fault
2NAC (Notification Appliance Circuit) trouble
3Panel Circuit trouble
4Control/Relay module or transponder trouble
5AC power loss
6Battery or charger failure
7Communication loss with annunciators or modules
Resolution Steps
Press the ACKNOWLEDGE/SCROLL DISPLAY key to silence the panel sounder and switch the SYSTEM TROUBLE LED from flashing to steady. Observe the LCD display for a specific Type Code and trouble message (e.g., AC FAIL, BATTERY, etc.) to identify the exact source of the fault and refer to the system trouble table for specific corrective actions.
The system enters System Trouble mode when the control panel detects an electrical fault or a trouble condition on a supervised circuit or module.
Common Causes
1Electrical fault
2NAC (Notification Appliance Circuit) trouble
3Panel Circuit trouble
4Control/Relay module or transponder trouble
5AC power loss
6Battery or charger failure
7Communication loss with annunciators or modules
Resolution Steps
Press the ACKNOWLEDGE/SCROLL DISPLAY key to silence the panel sounder and switch the SYSTEM TROUBLE LED from flashing to steady. Observe the LCD display for a specific Type Code and trouble message (e.g., AC FAIL, BATTERY, etc.) to identify the exact source of the fault and refer to the system trouble table for specific corrective actions.
