Lucent Technologies Lineage
®
2000 ECS/GPS Battery Plant J85500G-2
Issue 6 May 1999
Maintenance 5 - 3
1. A distribution breaker may have been inadvertently turned
off manually. If this is the case, follow the proper
procedure to restore power to the load equipment. If a
distribution breaker is no longer needed, it may be
unplugged from the panel or left in the OFF position.
2. A distribution breaker or fuse may be open due to a short
circuit in the load equipment or wiring. The fault must be
cleared before resetting the breaker, except when the open
is suspected to be caused by inrush current during
equipment start up.
3. A circuit breaker may fail such that it cannot be reset.
Replace a failed distribution breaker. A failed fuse must
always be replaced. See procedure for Load Circuit
Breaker or Fuse Replacement, below.
Red LVD OPEN
LED Lit
The Red LVD OPEN LED indicates that the LVD Contactor is
de-energized, i.e. open. The contactor may be open due to one of
four reasons:
1. Plant voltage is below the disconnect threshold.
2. The contactor has failed and must be replaced. See
procedure for LVD/R Contactor Replacement, below.
3. There is an open circuit in the wiring that powers the
contactor. Check the cable assembly from CP5 to the
contactor (see drawing T-82673-31).
4. Both redundant LVD sensing circuits have failed. The CP5
circuit pack must be replaced. See procedure for
LVD/Fuse Board (CP5) Replacement, below.
Yellow LVD
FAIL LED Lit
The Yellow LVD FAIL LED indicates that one or both of the
LVD circuits has attempted to open the contactor, but the
contactor is closed. This may occur in two situations.
1. The plant voltage is right at the disconnect level and is
within tolerances of the redundant detector circuits, but
only one detector has operated. No action is required.