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BMS AP9921X-AP9922; Environment Alarms

Published date: 19 September 2018

 
 
 
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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