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Troubleshooting Tip

When diagnosing codes, always check the event history log first. Many trouble conditions are intermittent and tied to environmental factors like temperature or moisture.

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External N2 Trouble: 4010ES Trouble Code | Fire Alarm Resource Center

External N2 Trouble

trouble

Simplex 4010ES

67 views·0 field notes

What This Code Means

The panel has lost communication with all slave cards on the N2 bus.

Common Causes

1N2 bus wiring fault
2Loss of power to slave cards
3Master N2 controller failure

Resolution Steps

Check N2 bus wiring and power to all slave cards; perform a System Reset.

Manual References(3)

1simplex4010ES Releasing ControlDatasheet2025p. 2Open

2simplex4010ESDatasheet2020p. 3Open

3simplex4010ESOperations2016p. 26, 3, 4Open

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Related Codes

4009 NAC Power FailureOne or more NACs on a 4009 IDNet NAC Extender has a power failure.IDNet Device: M#-# Battery FaultThis trouble indicates that there is a battery failure on the 4009 IDNet NAC Extender device connected to the system.[Point Label] DISABLED TROUBLEA point or zone has been manually inhibited from reporting alarm conditions or other status changes, typically because the device is malfunctioning or undergoing maintenance.SUPERVISORYA Supervisory condition indicates that some part of the building’s fire protection system is disabled or a lower priority initiating device has been triggered.City DisconnectThe city circuit has been disconnected.

Related Questions

What are the NAC circuit specifications for the Simplex 4010ES, and how many notification appliance circuits does it support?How do I add IDNet devices to an existing 4010ES system?Can the 4010ES be networked with 4100ES panels on ES Net?

All 4010ES trouble codes 4010ES panel page