Lucent Technologies 1200A 24V ECS Battery Plant J85500E-2
6 - 4 Maintenance
Issue 7 October 1998
Table 6-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