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Lucent Technologies 1200A 24V ECS Battery Plant J85500E-2
6 - 6 Maintenance
Issue 7 October 1998
•
The LVD circuit has partially failed. Replace the CP5
circuit pack per procedure “LVD/Fuse Board (CP5)
Replacement” below.
Blown Fuse on
CP5
Refer to ECS controller manual for troubleshooting procedures.
Repair and
Replacement
Load Circuit
Breaker
Replacement
1. Obtain a replacement circuit breaker. See paragraph
“Spare Parts.”
2. Verify that the faulty breaker is in the OFF position.
3. Loosen the 1/4 turn fasteners and open the dc distribution
cover.
4. Measure the voltage at the load connection associated with
the faulty breaker, to verify that the breaker is truly open.
The voltage relative to the battery bus bars or circuit
breaker bus bar should be approximately the float voltage
of the plant.
If the faulty breaker is, in fact, still closed, the load
equipment which it powers must be shut down so that no
current flows through the breaker.
5. Unplug the faulty breaker from the printed wiring board.
Note
Replace with fuse of same rating only.
Note
Procedures in this paragraph may cause power alarms to be
issued temporarily. Notify the alarm reporting center before
starting any repair procedure.
Warning
Do not attempt to unplug a circuit breaker which may be
carrying current. Arcing may result in personnel injury and
equipment damage.