Nortel DMS-100 Series Maintenance Manual page 617

Battery replacement in an OPM
At the MAP terminal
1 To access the PES MAP display level, type
>MAPCI;MTC;PM;PES
and press the Enter key.
2 To post the alarm state, type
>POST alarm_state
and press the Enter key.
where
alarm_state
is RED, AMBER, GREEN or OFFL
3
To disable the automatic battery rotation and testing, type
>AUDIT DISABLE
and press the Enter key.
4 To open the circuit to the battery strings to replace, type
>OPENCKT n
OPM routine maintenance procedures
DANGER
Possible system damage
When you add or remove battery strings from an active OPM,
make sure the battery strings are in the open-circuit state.
Check the state of the battery strings at the MAP terminal.
Turn off the associated battery charger controller card BCC
NT8X02. Connect or disconnect the battery cables at the
back of the cabinet. When the affected battery strings are
connected, return the battery strings to the load bus one string
at a time. If there is no MAP control, turn off the BCC before
you connect or disconnect any battery strings.
WARNING
Possible loss of service during battery replacement
Do not turn off more than one BCC NT8X02 at a time. If
you turn off more than one BCC NT8X02 at a time, service is
lost if ac power is interrupted. Turn off BCC0 when you
work on battery strings 0, 1, 2 or 3. Turn off BCC1 when you
work on battery strings 4, 5, 6, or 7.
DMS-100 Family OPM Maintenance Manual XPM14 and up
Battery replacement
OPM
(continued)
13-15