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LO VALtrouble

Notifier NFS2-640: LO VAL

Notifier NFS2-640·1 view·0 field notes

What This Code Means

The detector chamber reading is too low, or the detector is not operating properly. In CLIP mode, this may also indicate a failure of the thermistors, CO element, or infra-red element, or a freeze warning.

Common Causes

  • 1Detector chamber reading is too low
  • 2Detector is not operating properly
  • 3Thermistors, CO element, or infra-red element failure on an FSC-851 IntelliQuad (CLIP mode only)
  • 4Freeze warning on an FSC-851 IntelliQuad (CLIP mode only)

Resolution Steps

The detector must be removed and replaced by an authorized service representative.

Manual References(4)

Field Notes

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Related Codes

INVREPThe device has returned a response to the panel that the panel did not expect.Low Chamber valueA maintenance warning level indicating that the detector chamber reading is too low, which typically signifies a hardware malfunction.INST ON L1No devices are installed on the system.STYLE 6 POS. LOOP xThere is an open circuit on the positive side of loop x.FREEZE WARNINGThe temperature read by a Heat+ or Acclimate Plus™ detector has dropped below the low-temperature threshold, typically 40°F (4.44°C).

Related Questions

What batteries does the NFS-320 use, and when is an external battery box required?How does the NFW2-100 ground fault detection work?What are the main differences between the NFS-320 and the NFS2-640?
All NFS2-640 trouble codesNFS2-640 panel page