Nortel DMS-100 Series Maintenance Manual page 719

Open circuit test failure
At the MAP terminal
1 To access the OPMPES MAP display level, type
>MAPCI;MTC;PM;PES
and press the Enter key.
2 To post the appropriate alarm, type
>POST alarm_state
and press the Enter key.
where
alarm_state is RED, AMBER, GREEN, or OFFL
Note: This command posts all PMs in the named alarm state, and displays the
first PM in the set. Use the NEXT command to scroll through the posted PMs
until the MAP terminal displays the correct OPAC.
3 To disable the automatic battery rotation and testing, type
>AUDIT DISABLE
and press the Enter key.
4
From the PES117 log, determine which battery string voltage tested below
OPM_VOLT_TST_DIS. If the system marked strings 1 and 5 failed, determine
if string 1, 5, or both, caused the alarm.
Note: OPACs with MTU: Default OPM_VOLT_TST_DIS = –495 or –49.5 Vdc
5 To open the circuit to the failed battery string pair, type
>OPENCKT n
and press the Enter key.
where
n is the number of the string pair (0–2)
Leave the string pair in the open-circuit state for at least 6 hours before you
proceed to the next step.
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Routine maintenance procedures 13-71
Open-circuit test failure
OPAC
(continued)