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Nac 2 Fault

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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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Bell 2 circuit fault: MS-5024 Trouble Code | Fire Alarm Resource Center

Bell 2 circuit fault

trouble

Fire-Lite MS-5024

62 views·0 field notes

What This Code Means

A fault condition (open or short) exists on Notification Appliance Circuit 2.

Common Causes

1Broken field wiring
2Short circuit in notification devices
3Missing EOL resistor

Resolution Steps

Check NAC 2 wiring for opens or shorts. Verify the presence of the correct EOL resistor. Use Troubleshoot Mode to check circuit voltage.

Manual References(4)

1fire-liteMS-5024Installation1997Open

2fire-liteMS-5024UDInstallation1997Open

3fire-liteMS-5024Operating Instructions1994Open

Field Notes

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Related Codes

Bell 1 circuit faultA fault condition (open or short) exists on Notification Appliance Circuit 1.Annunciator FaultCommunication has been lost between the main control panel and a remote annunciator.AC Loss (shown only when requested)The AC ON indicator turns off and the trouble LED turns on when the AC line voltage drops below the Low Line threshold.Ground faultThe control panel has detected that a supervised circuit, such as a zone or NAC, is in contact with earth ground.SUPX (X=Zone Number)A condition indicating that a waterflow sensing device, its wiring, or a tamper switch is in an off-normal state.

Related Questions

How do I perform a walk test on the MS-5024 without triggering a full alarm?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?

All MS-5024 trouble codes MS-5024 panel page