Notifier NFS2-640

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What This Code Means

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

Common Causes

1Open circuit on the negative side of the SLC loop

Resolution Steps

Locate and correct the open circuit condition on the negative side of the specified loop, then press the RESET button to clear the latching trouble. Note that Style 7 configuration of the SLC requires the use of ISO-X isolator modules.

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.