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Nac 4 Fault

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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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NAC 4 FAULT: MS-9200UDLS Trouble Code | Fire Alarm Resource Center

NAC 4 FAULT

trouble

Fire-Lite MS-9200UDLS

124 views·0 field notes

What This Code Means

A fault condition (open or short) has been detected on Notification Appliance Circuit 4.

Common Causes

1Missing 4.7K ohm EOL resistor
2Broken circuit wiring
3Short in a notification appliance

Resolution Steps

Check for the presence of the 4.7K ohm EOL resistor at the end of the circuit. Inspect wiring for opens or shorts.

Manual References(3)

1fire-liteMS-9200UDLSInstallation2005p. 110, 153, 108Open

2fire-liteMS-9200UDLS Rev 2Datasheet2009Open

3fire-liteMS-9200UDLS Rev 3Datasheet2010Open

Field Notes

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Related Codes

NAC 3 FAULTA fault condition (open or short) has been detected on Notification Appliance Circuit 3.COMM FAULT 1The communicator failed to successfully transmit a report to the central station using line 1.TELCO LINE 1The panel has detected a loss of voltage or failure on telephone line 1.COMM FAULT 1 / COMM FAULT 2Indicates a communication failure between the panel's internal Digital Alarm Communicator/Transmitter (DACT) and the central station.REMOTE SYNC FAULTA fault has been detected on the remote synchronization output circuit.

Related Questions

What does INVREP trouble mean on the MS-9200UDLS and how do I resolve it?How do I perform a walk test on the MS-9200UDLS?How do I troubleshoot a ground fault on the MS-9200UDLS?

All MS-9200UDLS trouble codes MS-9200UDLS panel page