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NFPA 72-2025
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Trouble Codes

Browse trouble codes by brand. Find meanings, common causes, and resolution steps

Notifier
177 trouble codes
Edwards EST
93 trouble codes
Fire-Lite
91 trouble codes
Simplex
88 trouble codes
Kidde
84 trouble codes
Silent Knight
75 trouble codes
Honeywell
27 trouble codes
Fenwal
20 trouble codes
Siemens
19 trouble codes
ESSER
14 trouble codes
Common Categories
System TroubleSupervisoryGround FaultNACCommunicationPowerDeviceNetwork
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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