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    BMS AP9921X-AP9922; Environment Alarms

     
     
     
    Issue:
    BMS AP9921X-AP9922; Environment Alarms
     
    Product line:
    Battery Management System (BMS) AP9921X & AP9922
     
    Environment:
    All models, all serial numbers
     
    Cause:
    Critical Alarms
     
    High Ambient Temperature:
    The air temperature in the battery string environment is above the configured threshold. Default high threshold: 95.0°F (35°C) Check temperature control and ventilation systems in the room, and check for overheated batteries (usually caused by overcharging). NOTE: Lead-Acid batteries provide optimum output and longevity at 77°F. An uncorrected high temperature can significantly shorten the life of the battery string.
     
    Warning Alarms
     
    Low Ambient Temperature:
    The air temperature in the battery string environment is below the configured threshold. Default low threshold: 50.0°F (10°C) Check temperature control and ventilation systems in the room. NOTE: Lead-Acid batteries provide optimum output and longevity at 77°F. An uncorrected low temperature can prevent the battery from providing adequate power to the UPS, and will cause the UPS to drop the load prematurely.
     
    Input Contacts:
    Activation of input contacts triggers an alarm. Check the status of the external monitoring device that sent the input signal.
     
    Resolution:
    Correct the cause of the failure symptom, alarm.
     
     

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