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Silent Knight
5820xl
Ac Failure

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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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System Power (Flashes): 5820XL Trouble Code | Fire Alarm Resource Center

System Power (Flashes)

trouble

Silent Knight 5820XL

94 views·0 field notes

What This Code Means

The panel has lost primary AC power and is running on battery backup.

Common Causes

1Tripped circuit breaker
2Local power outage
3Blown transformer fuse

Resolution Steps

Check the main circuit breaker and power source. Verify the transformer connection to the panel and check for blown fuses.

Manual References(4)

1silent knight5820XLInstallation2007Open

2silent knight5820XLInstallation2013p. 206Open

3silent knight5820XLDatasheet2006Open

Field Notes

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Related Codes

Detector troubleA smoke or heat detector is reporting a fault condition to the panel.Water flow switch troubleA fault has been detected in the wiring or switch of a water flow initiation circuit.BATTERY LOWThe system has detected that the standby battery voltage is below the acceptable threshold, indicating the batteries are depleted or failing to hold a charge.GROUND FAULTAn earth ground fault occurs when the panel senses an unexpected flow of current from one or more of its terminals to the earth connection (Terminal 2).Battery voltage lowThe system has detected that the battery voltage is below the required threshold for reliable operation, typically less than 85% of its rating.

Related Questions

What does 'KEY BUS TROUBLE' mean on the 5820XL and how do I resolve it?What is the difference between SK protocol and SD protocol on the 5820XL, and can they be mixed?How do I perform a walk test on the Silent Knight 5820XL?

All 5820XL trouble codes 5820XL panel page