PREALMsupervisory

Notifier NFS2-640: PREALM

Notifier NFS2-640·0 views·0 field notes

What This Code Means

The control panel activates a Pre-Alarm Warning when a detector exceeds its programmed Pre-Alarm Alert or Action level, providing an early warning of incipient or potential fire conditions.

Common Causes

1Smoke or heat levels reaching the programmed pre-alarm threshold
2Dust or dirt accumulation in the detector
3Environmental transients or electrical interference
4Incipient fire condition

Resolution Steps

Identify the device address and location from the LCD display. Investigate the specified area for signs of fire or smoke. If no fire is present, inspect the detector for contamination or dust. For 'Alert' (non-latching) conditions, the status will clear automatically when smoke levels drop; for 'Action' (latching) conditions, the system must be reset after the condition is cleared.

Manual References(3)

1notifierNFS-640Operations2003Open

2notifierNFS-640Datasheet2006Open

3notifierNFS2-640Datasheet2017Open

Field Notes

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Related Codes

TROUBLA status banner displayed on the LCD indicating that the control panel has detected an electrical fault or a functional issue with a system component or device.INVREPThe device has returned a response to the panel that the panel did not expect.Low Chamber valueA maintenance warning level indicating that the detector chamber reading is too low, which typically signifies a hardware malfunction.FREEZE WARNINGThe temperature read by a Heat+ or Acclimate Plus™ detector has dropped below the low-temperature threshold, typically 40°F (4.44°C).STYLE 6 POS. LOOP xThere is an open circuit on the positive side of loop x.