Lucent Technologies Lineage
®
2000 ECS Battery Plant J855003D-3
Issue 5 January 1999
Maintenance 5 - 3
Troubleshooting
Table 5-A provides a list of observable trouble conditions, their
possible causes and the necessary corrective action for each
cause. The table is organized by the subsystem in which the
trouble is observed.
Open
Distribution
Breaker
A distribution breaker which should be closed may be in the
open position for one of three reasons.
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 may trip due to a short circuit in the
load equipment or wiring. The fault must be cleared before
resetting the breaker, except when the trip is suspected to
be caused by inrush current during equipment start up. The
handle will be between the ON and OFF positions when
the breaker has tripped due to overcurrent.
Table 5-A: Troubleshooting
OBSERVED CONDITION
PROBABLE CAUSE
PROCEDURE
CONTROLLER
Red or yellow LEDs lit
No LEDs or Display lit
Meter inaccuracy
Office alarms issued
False alarms issued
Blown fuse on LVD/Fuse board
See “Troubleshooting” in Controller Manual
RECTIFIER
Red or yellow LEDs lit
No LEDs or Display lit
No output/low output
Oscillation
Open output breaker
See “Troubleshooting” in Rectifier Manual
DC DISTRIBUTION SUBSYSTEM
Open distribution breaker
1. manually turned of
2. overcurrent trip
3. breaker failure
See “Open Distribution
Breaker” section below
“LVD OPEN” LED lit
1. failed LVD contactor
2. low voltage
3. faulty wiring
4. LVD circuit failure
See “Red LVD OPEN
LVD Lit” section below
“LVD FAIL” LED lit
1. low voltage
2. LVD circuit failure
See “Yellow LVD FAIL
LED Lit” section below