LO VAL: NFS2-640 Trouble Code | Fire Alarm Resource Center
LO VAL
trouble
Notifier NFS2-640
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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.
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.
