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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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AC_FAIL: MS-9200UDLS Trouble Code | Fire Alarm Resource Center

AC_FAIL

trouble

Fire-Lite MS-9200UDLS

64 views·0 field notes

What This Code Means

The control panel has lost its primary AC power source.

Common Causes

1Tripped circuit breaker
2Blown AC fuse
3Local power outage
4Loose AC wiring connections

Resolution Steps

Verify the AC power source and circuit breaker. Check the AC wiring at the panel terminals and inspect the internal AC fuse. Restore power to the panel.

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

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