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CO EXP
maintenance

Notifier NFS-320

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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)

Field Notes

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Related Codes

LO VALThe detector chamber reading is too low or internal elements are failing.INVREPThe device has returned a response to the panel that the panel did not recognize.BAT.BACKUP RAMThe RAM battery backup voltage is low.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.SHORTThe module device has a short circuit on its supervised wiring.

Related Questions

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