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Millennium SC_MAN
Rev 2.0
Controller Alarm Descriptions
Table 33 Controller Alarm Descriptions
Alarm Description
Explanation
ACO Active
Alarm Cut
-
Off has been initiated to silence local audible alarms. Any subsequent Power
Critical, Power Major, or Power Minor alarm disables ACO. A programmable ACO time
-
out
period for each alarm severity resets silenced alarms.
Alarm Battery Supply
Operated ABS fuse (F2) on MCR1 card.
AC Fail
A rectifier is reporting an ACF to the controller.
Auxiliary Major
A resistive battery potential is present on the AMJ alarm input BSL
-
64, indicating a major
alarm is active in the external equipment connected to this point.
Auxiliary Minor
A resistive battery potential is present on the AMN alarm input BSL
-
66, indicating a minor
alarm is active in the external equipment connected to this point.
Alarm Test Active
Alarm Test is currently active. Any real alarm with a severity of Critical, Major or Minor,
other than RFA or HV, aborts an active Alarm Test.
Alarm Test Aborted
Alarm Test has been aborted by an alarm. This is a latched event, remaining active until
cleared by a user.
Memory Backup Battery Low
The controller memory battery requires replacement.
Battery Type Conflict
The DC Plant –
Battery Type and Battery Management –
Battery Test Class attributes
(sealed vs. flooded) do not match.
Battery On Discharge
The plant voltage is below the threshold set for BD in the present plant mode, FLOAT or
BOOST/BTP. This alarm will not retire immediately upon rectifier restoration after an
extended discharge. Plant voltage will not fully recover until depleted battery energy has
been replaced. Do NOT adjust the rectifier voltage adjustments if they are at or near rated
output currents.
Battery Test Failed
A Battery Test was aborted before a reserve time could be established. This is a latched
event, remaining active until cleared by a user.
Bay Interface ID Conflict
The ID for a BIC (Bay Interface Card) connected to the controller
’
s serial bus is the same as
that of a previously installed BIC.
Battery Test Active
A Battery Test session has been initiated. (Available only in plants with all serial rectifiers.
Rectifier voltage has been lowered and the batteries are discharging.) The BD LED and BD
relays are active and both the BD and VLV alarm thresholds along with STC (Slope Thermal
Compensation) are inhibited while the Battery Test is active.