Maintenance Urgentmaintenance

Notifier NFS2-640: Maintenance Urgent

Notifier NFS2-640·0 views·0 field notes

What This Code Means

Indicative of dust accumulation above the allowed limit within a detector's chamber.

Common Causes

1Dust accumulation above the allowed limit
2Contaminated detector chamber
3Drift compensation has reached its maximum threshold

Resolution Steps

The detector's performance may be compromised. The device should be inspected, cleaned, or replaced by an authorized service representative to ensure it can still detect actual smoke and resist false alarms.

Manual References(3)

1notifierNFS2-640Datasheet2017Open

2notifierNFS-640Operations2003Open

3notifierNFS-640Datasheet2006Open

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.