BATTERY LOW: 5820XL Trouble Code | Fire Alarm Resource Center
BATTERY LOW
trouble
Silent Knight 5820XL
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What This Code Means
The system has detected that the standby battery voltage is below the acceptable threshold, indicating the batteries are depleted or failing to hold a charge.
Common Causes
1Battery terminal voltage is less than 85% of its rating
2Batteries are older than five years
3Battery size is too small for the installation load
4AC power failure has depleted the standby batteries
Resolution Steps
If new batteries were installed, wait 48 hours before completing this step. 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.
