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

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(2)

1notifierNFS2-640Operations2013p. 72Open

2notifierNFS2-640Datasheet2017Open

Related Codes

INVREPThe device has returned a response to the panel that the panel did not expect.INST ON L1No devices are installed on the system.PREALMThe control panel activates a Pre-Alarm Warning when a detector exceeds its programmed Pre-Alarm Alert or Action level, providing an early warning of incipient or potential fire conditions.NETWORK FAIL PORT xCommunication lost between NCM Port x and corresponding node.TROUBLThe system enters System Trouble mode when the control panel detects an electrical fault or a trouble condition on a supervised circuit or module.

Notifier NFS2-640

What This Code Means

Common Causes

Resolution Steps

Manual References(2)

Field Notes

Related Codes

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