Battery voltage low: 5820XL Trouble Code | Fire Alarm Resource Center

What This Code Means

The system has detected that the battery voltage is below the required threshold for reliable operation, typically less than 85% of its rating.

Common Causes

1Battery terminal voltage less than 85% of rating
2Battery too small for the installation
3Batteries older than five years
4Batteries wired in parallel instead of series

Resolution Steps

Measure battery voltage while the Notification Appliances are sounding. Replace any battery with terminal voltage less than 85% of rating. Reapply AC power and RESET system.

Manual References(5)

1silent knight5820XLInstallation2007Open

2silent knight5820XLDatasheet2006Open

3silent knight5820XLDatasheet2006Open

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.System Power (Flashes)The panel has lost primary AC power and is running on battery backup.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).

Silent Knight 5820XL

What This Code Means

Common Causes

Resolution Steps

Manual References(5)

Field Notes

Related Codes

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