GE Industrial Solutions Millennium II Controller J85501P-1 - Manual (Page 108)

Basic Installation and User’s Guide for the Millennium II Controller
Issue 3 January 2008 108
Alarm Description Explanation
External Fuse Major A resistive battery potential is present on the FAJ alarm
input at Millennium BSL-63, indicating a major fuse or CB
alarm is active in the plant distribution circuit connected to
this point.
External Fuse Minor A resistive battery potential is present on the FAN alarm
input at Millennium BSL-65, indicating a minor fuse alarm
is active in the plant circuit connected to this point.
Typically only the capacitor charge circuit fuse alarm is
wired here as a minor fuse alarm
History Cleared A user has cleared the event history record of one of
Millennium II’s history reports. This is a latched event,
remaining active until cleared by a user.
High Float Voltage Plant voltage is above the programmed threshold for this
alarm. The HFV threshold should be set lower than the HV
threshold which causes a HVSD signal to be issued to plant
rectifiers.
High Voltage Plant voltage is above the programmed threshold for this
alarm. The HV alarm causes a HVSD signal to be issued to
plant rectifiers.
Low Current A connected rectifier has load share enabled, but its present
output load is less than a predefined threshold for that
rectifier type. (Usually 3% or less of capacity.)
Limited Recharge The plant load has exceeded the programmed percentage of
the total rectifier capacity set for this alarm. Rectifier
capacity may be inadequate for recharging batteries in an
acceptable period of time following an extended battery
discharge. This is a latched event, remaining active until
cleared by a user.
Low Voltage Disconnect An externally controlled LVD is open, providing a closure
signal to Millennium BSL-61/-62 for alarm purposes.
Low Voltage Disconnect
Fail The monitoring circuit of an external LVD has failed,
providing a resistive battery potential signal into
Millennium BSL-84.
Manual Off A connected rectifier has been manually turned off or has
lost AC input power.
Major Comm Fail Alarm The controller has lost communication with two or more
devices that it had previously recognized on its
rectifier/converter/BIC serial bus. Typically indicates that
the serial bus is physically interrupted. If any of these
devices is being permanently removed from service, it is
necessary to issue UNINSTALL DEVICES command to
clear this alarm.