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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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OPEN: NFS-320 Trouble Code | Fire Alarm Resource Center

OPEN

trouble

Notifier NFS-320

69 views·0 field notes

What This Code Means

The module device has an open circuit on its supervised wiring.

Common Causes

1Open circuit on supervised wiring
2Input or output device not connected properly
3Loose wiring connections at the module

Resolution Steps

Check the connections from the module to the input or output device to which it is wired.

Manual References(4)

1notifierNFS-320Datasheet2017Open

2notifierNFS-320CDatasheet2017Open

3notifierNFS-320Datasheet2008Open

Field Notes

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Related Codes

LO VALThe detector chamber reading is too low or internal elements are failing.BAT.BACKUP RAMThe RAM battery backup voltage is low.PRLOSSThe output module or new sounder base lost power.INVREPThe device has returned a response to the panel that the panel did not recognize.System ResetA system command or status message indicating the control panel is clearing all active inputs, interrupting resettable power, and decoupling from the network for 60 seconds.

Related Questions

What are the main differences between the NFS-320 and the NFS2-640?What are the NAC circuit specifications for the NFS-320, and how does the shared 6-amp power supply limit total NAC loading?What batteries does the NFS-320 use, and when is an external battery box required?

All NFS-320 trouble codes NFS-320 panel page