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NAC Faulttrouble

Fire-Lite MS-9600: NAC Fault

Fire-Lite MS-9600·1 view·0 field notes

What This Code Means

A problem has been detected on one of the Notification Appliance Circuits.

Common Causes

  • 1Open circuit in NAC wiring
  • 2Short circuit in NAC wiring
  • 3Missing or incorrect 4.7K ohm End-of-Line resistor

Resolution Steps

Check NAC wiring for continuity and shorts. Verify that a 4.7K ohm EOL resistor is installed at the last device on the circuit.

Manual References(6)

Field Notes

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Related Codes

AC LOSSThe control panel has lost its primary AC power supply and is currently operating on standby batteries.EARTH FAULTA ground fault condition indicating zero impedance between the Fire Alarm Control Panel and ground.Duplicate AddressThe system has detected more than one device sharing the same SLC address.DISABLIndicates that a zone, NAC, detector, or module has been temporarily disabled in programming by the user.WaterflowThe system has detected water movement in the sprinkler piping, indicating a possible fire or leak.

Related Questions

How do I set zone types on the MS-5024?What batteries does the MS-9600 use?What is the maximum SLC loop capacity of the MS-5024, and which Fire-Lite detectors and modules are compatible?
All MS-9600 trouble codesMS-9600 panel page