APC Battery Management System - Manual (Page 176)

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USER’S GUIDE
Battery Management System
169
Alarms
Fault Alarm Criteria
Fault LED Fault Criteria
Charger Voltage Low Charger Less than 2.1 volts per cell for lead-acid
batteries, or as set by user.
Charger Voltage High Charger Greater than 2.4 volts per cell for lead-acid
batteries or as set by user.
Shorted Cell Batteries Less than ((#Cells/Batt)-1) x (Vstring)
(#Cells/Batt) x (#Batt/String)
Blown Fuse/Open
Connections or Wiring Management
Controller Less than ½ volt on first or last battery in a
string or two consecutive batteries within a
string.
Low Capacity Batteries Any individual battery with more than 20%
lower voltage than the highest battery in
the same string during a discharge.
Thermal Runaway Batteries Greater than 20% more response current
than the benchmark, or greater than 95º F
battery temperature, or as set by the user.
Dryout/Sulfation/Opens Batteries Greater than 20% less response current
than benchmark, or as set by user.
High or Low Operating
Temperature Environment Less than 50° F or greater than 95° F or as
set by the user.
High Ripple Current Charger Greater than 5 amps RMS per ampere-
hour or as set by the user.