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NAC trouble
trouble

Kidde FX-5

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What This Code Means

A Notification Appliance Circuit (NAC) has a wiring fault.

Common Causes

  • 1Open circuit or missing EOL resistor
  • 2Short circuit in notification appliance wiring
  • 3Grounded NAC wire

Resolution Steps

Inspect NAC wiring for opens or shorts. Verify the EOL resistor is present and of the correct value. Check for pinched wires behind notification appliances.

Manual References(2)

Field Notes

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Related Codes

Charger TroubleThe panel detected a fault in the battery charging circuit.AUX Power TroubThe panel detected a trouble condition in the auxiliary power circuit.Battery BadThe standby battery has failed a load test and is no longer reliable.DACT Configuration TRBLThe F-DACT1(F) dialer is either not programmed or contains unverified configuration changes.AC FailureThe control panel has lost primary AC power.

Related Questions

Why does my FX-5 show a NAC circuit trouble even though all appliances are wired and the EOL resistor is installed?How do I clear a ground fault trouble on the Kidde FX-5 when the Ground Fault LED stays lit?What battery size fits inside the FX-5 cabinet, and what is the maximum Ah rating the charger can support?
All FX-5 trouble codesFX-5 panel page