TROUBL CONTROLtrouble

Notifier NFS2-640: TROUBL CONTROL

Notifier NFS2-640·0 views·0 field notes

What This Code Means

A trouble condition occurring on a Notification Appliance Circuit (NAC), indicating an electrical fault such as an open or short circuit on the supervised output.

Common Causes

1Open circuit in NAC wiring
2Short circuit in NAC wiring
3Faulty notification appliance
4Missing or incorrect end-of-line resistor

Resolution Steps

Press the ACKNOWLEDGE/SCROLL DISPLAY key to silence the panel sounder and switch the SYSTEM TROUBLE LED to steady. Check the LCD display for the specific device address and the type of trouble (e.g., OPEN or SHORT). Inspect the wiring and devices at the indicated location and correct the fault. The panel will return to normal operation once the condition is corrected.

Manual References(2)

1notifierNFS-640Operations2003Open

2notifierNFS2-640Operations2013p. 34Open

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.