SUP.L(ION): NFS2-640 Trouble Code | Fire Alarm Resource Center

What This Code Means

Ionization detector indicating a latching supervisory (non-alarm) condition.

Common Causes

1Ionization detector sensing smoke or combustion products at a supervisory threshold
2Environmental contaminants such as dust or steam
3Latching supervisory activation from the detector

Resolution Steps

Investigate the location of the ionization detector to identify the cause of activation. Once the condition is cleared, press the ACKNOWLEDGE/SCROLL DISPLAY key to silence the panel sounder, then press the SYSTEM RESET key to return the panel to normal operation.

Manual References(1)

1notifierNFS2-640Datasheet2017Open

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.LO VALThe 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.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.

Notifier NFS2-640

What This Code Means

Common Causes

Resolution Steps

Manual References(1)

Field Notes

Related Codes

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