BMS AP9921X-AP9922; alarms “Battery Low Chemistry Voltage”
Battery Management System (BMS) AP9921X & AP9922
All models, all serial numbers
The voltage of a battery is below the threshold for the battery type.
Identify the listed batteries immediately so that system backup time is not reduced. Check for exterior causes of this alarm, such as a loose connection or corrosion on a battery post. If the battery has no external problems, perform a follow-up reading with a battery tester. If a specific battery causes repeated alarms (especially if the voltage continues to decrease), the battery is failing. Replace the battery.