NFS2-640 Trouble Codes

The status banner displays ACTIVE when a monitor module programmed with a Trouble Monitor Type Code (such as AUDIO SYSTEM or POWER MONITR) is activated. These modules monitor external system functions that produce trouble signals.

The system enters Supervisory mode when a monitor module point programmed with a Supervisory type code activates.

A trouble condition occurring on a control/relay module or control/relay transponder.

The CO element on a detector is not working properly.

A point (detector, module, or zone) has been manually disabled by a user.

The temperature read by a Heat+ or Acclimate Plus™ detector has dropped below the low-temperature threshold, typically 40°F (4.44°C).

There is a ground fault on the main or auxiliary power supply.

The auxiliary power supply’s battery charge is too high.

No devices are installed on the system.

The device has returned a response to the panel that the panel did not expect.

The infrared element is not working properly on an FSC-851 IntelliQuad detector.

The auxiliary power supply’s battery charge is low, or an RFX device’s battery charge is low.

The temperature read by a Heat+ or Acclimate™+ detector is too low.

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.

A maintenance warning level indicating that the detector chamber reading is too low, which typically signifies a hardware malfunction.

Indicative of dust accumulation that is near but below the allowed limit.

Indicative of dust accumulation above the allowed limit within a detector's chamber.

A TM-4 transmitter module connected to a municipal box is not responding to the control panel.

A TM-4 connected to a municipal box is in trouble.

A trouble condition occurring on a Notification Appliance Circuit (NAC), indicating an electrical fault such as an open or short circuit on the supervised output.

Communication lost between NCM Port x and corresponding node.

The brand of this panel is incompatible with this network.

This message occurs every day at 11 AM if any troubles exist on the system.

A trouble condition occurring on a Panel Circuit, which includes ICM-4RK, CRM-4RK, VCM-4RK, or DCM-4RK panel modules connected to the control panel.

There has been a communication failure with the power supply.

A Pre-Alarm Warning indicates that a smoke detector has reached a programmed threshold (either Alert or Action level) that is below the actual alarm threshold, providing an early warning of potential fire conditions.

The 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.

A user is currently accessing the panel’s programming menus or a database download is in progress.

This is a Type Code for a multisensor smoke detector (such as the Acclimate Plus™) operating in CLIP mode. It indicates that the detector has been activated.

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

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

The control panel has detected a short circuit on the SLC loop configured for Style 6 or Style 7. The panel is driving both ends of the loop to maintain communication in an unsupervised method.

The control panel has detected a trouble (open or short) on an SLC loop configured for Style 6 or Style 7. The panel drives both ends of the loop to maintain communication in an unsupervised method.

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

The system enters System Trouble mode when the control panel detects an electrical fault or a trouble condition on a supervised circuit or module.