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AC Loss (shown only when requested)trouble

Fire-Lite MS-5024: AC Loss (shown only when requested)

Fire-Lite MS-5024·2 views·0 field notes

What This Code Means

The AC ON indicator turns off and the trouble LED turns on when the AC line voltage drops below the Low Line threshold.

Common Causes

  • 1AC line voltage drops below the Low Line threshold (102VAC for MS-5024)
  • 2AC Brownout condition
  • 3Complete loss of primary AC power

Resolution Steps

Enter Troubleshoot Mode by pressing MODE 8768 and [ENTER/STORE]. Press A followed by the [ENTER/STORE] key to display the AC input voltage. Verify that the AC line voltage is within the normal range (115VAC for MS-5024). Restore AC power to the panel; the control panel will turn on the AC LED and clear the trouble message upon restoral.

Manual References(3)

Field Notes

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Related Codes

System Off NormalThe system is in a non-standard operating mode, such as Troubleshoot or Programming mode.Bell 1 circuit faultA fault condition (open or short) exists on Notification Appliance Circuit 1.Ground faultThe control panel has detected that a supervised circuit, such as a zone or NAC, is in contact with earth ground.Primary Phone Line FaultThe panel has detected a loss of voltage or connection on the primary telephone line.Low batteryThe standby battery voltage is below the critical threshold required for proper operation.

Related Questions

How do I set zone types on the MS-5024?What is the maximum SLC loop capacity of the MS-5024, and which Fire-Lite detectors and modules are compatible?How do I troubleshoot a Loop Fault or SLC Communication Failure on the MS-5024?
All MS-5024 trouble codesMS-5024 panel page