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AC_FAILtrouble

Notifier NFW2-100: AC_FAIL

Notifier NFW2-100·2 views·0 field notes

What This Code Means

The control panel has lost primary AC power.

Common Causes

  • 1Tripped circuit breaker
  • 2Blown AC fuse
  • 3Local power outage

Resolution Steps

Check the primary AC breaker and verify voltage at the panel terminals. Replace the AC fuse if blown.

Manual References(1)

1notifierNFW2-100Installation2005p. 18, 127, 107, 109, 126, 6, 150, 151, 104, 106Open

Field Notes

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Related Codes

COMM FAULT 1The control panel has failed 10 total attempts to communicate with the primary Central Station phone number.TEST FIndicates a detector has failed the automatic test operation of its sensing chamber and electronics.NAC 1 FAULTA fault condition (open or short) on Notification Appliance Circuit 1.SLC 1 OPEN FAULTThis condition indicates an open circuit has been detected on the Signaling Line Circuit (SLC) loop or on an addressable device connected to the loop.INVREPInvalid reply from the addressable device, indicating a hardware problem.

Related Questions

How does the NFW2-100 ground fault detection work?What battery size does the NFW2-100 require, and how do I silence a battery trouble condition after replacement?What batteries does the NFS-320 use, and when is an external battery box required?
All NFW2-100 trouble codesNFW2-100 panel page
Common Categories
System TroubleSupervisoryGround FaultNACCommunicationPowerDeviceNetwork
Troubleshooting Tip

When diagnosing codes, always check the event history log first. Many trouble conditions are intermittent and tied to environmental factors like temperature or moisture.

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