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Co Exp

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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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CO EXP: NFS-320 Trouble Code | Fire Alarm Resource Center

CO EXP

maintenance

Notifier NFS-320

75 views·0 field notes

What This Code Means

The CO detection element on the detector has reached its expiration date.

Common Causes

1CO element expired

Resolution Steps

Replace the detector immediately.

Manual References(2)

1notifierNFS-320Operations2011p. 21, 68, 70, 5Open

2notifierNFS-320CDatasheet2017Open

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.SYS INITIALIZATIONThe devices are currently initializing.

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 does the INVREP trouble mean on an NFS-320, and what are the most likely causes when a single device shows this after being replaced?

All NFS-320 trouble codes NFS-320 panel page