Notifier NFS2-640

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What This Code Means

There is an open circuit on the positive side of loop x.

Common Causes

1Open circuit on the positive side of the SLC loop

Resolution Steps

Correct the open circuit condition on the positive side of the loop and press the RESET button. Note that Style 6 and Style 7 are supervised methods, and the panel will drive both ends of the loop in an unsupervised method until the latching trouble is cleared.

Manual References(1)

1notifierNFS2-640Operations2013p. 75Open

Field Notes

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Related Codes

INVREPThe device has returned a response to the panel that the panel did not expect.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.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.TROUBLThe system enters System Trouble mode when the control panel detects an electrical fault or a trouble condition on a supervised circuit or module.