Nortel DMS-100 Series Maintenance Manual page 638

13-36 OPM routine maintenance procedures
Open-circuit test failure
OPM
(continued)
Open-circuit test failure
At the MAP terminal
1
2
3
4
5
6
297-8361-550 Standard 04.01 September 2000
To access the PES MAP display level, type
>MAPCI;MTC;PM;PES
and press the Enter key.
To post the appropriate alarm, type
>POST alarm_state
and press the Enter key.
where
alarm_state
is RED or AMBER
To disable the automatic battery rotation and testing, type
>AUDIT DISABLE
and press the Enter key.
From the PES117 log, determine which battery string had voltage that tested
below OPM_VOLT_TST_DIS. If the open-circuit test marked strings 1 and 5
failed, determine if string 1, 5, or both, caused the alarm.
Note: OPMs with MTU default OPM_VOLT_TST_DIS = -495 or -49.5 Vdc
for Eagle Picher and Yuasa batteries. OPMs with LTU default
OPM_VOLT_TST_CHG is offset by OPM_VOLT_TST_LTU
ADJUSTMENT (default=10) and then truncated. -495+10 = -485 Trunc
(-485) = -480 or -48 Vdc for Eagle Picher and Yuasa batteries.
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 (0-3)
Note: Leave the string pair in the open-circuit for at least 6 hours before
you proceed to the next step.
To measure the voltage of the failed battery string pair, type
>MEASURE PAIR n
and press the Enter key.
where
n
is the number of the string pair (0-3)