Lucent Technologies Lineage
®
2000 ECS Battery Plant H569-416
5 - 4 Maintenance
Issue 2 August 1996
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.
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
a. manually turned off
b. overcurrent trip
c. breaker failure
Open Distribution Breaker
“LVD OPEN” LED lit
a. failed LVD contactor
b. low voltage
c. faulty wiring
d. LVD circuit failure
Red “LVD OPEN” LED Lit
“LVD FAIL” LED lit
a. low voltage
b. LVD circuit failure
Yellow “LVD FAIL” LED
Lit