Lucent Technologies 60V Small Broadband Power System J85500Q-1
8 - 2 Troubleshooting
Issue 4 October 1998
Table 8-A: Rectifier Trouble Conditions
Indication(s)
Possible Cause
Corrective Action
No LED is lit.
AC source not connected.
Check ac source.
No LED is lit.
Circuit breaker is not on
line.
Turn the input circuit
breaker on.
No LED is lit.
Rectifier may not be fully
seated in shelf.
Insert rectifier in shelf.
No LED is lit.
Rectifier defective.
Replace rectifier.
Alarm and Thermal
Alarm LEDs are lit.
Fan obstruction.
Check for fan obstruction.
Remove it.
Restart rectifier.
Thermal Alarm LED is lit.
There is no fan
obstruction.
Fans defective.
Remove rectifier from
shelf.
Replace fans.
Reinstall rectifier.
Alarm LED is lit and
Thermal Alarm LED is
not.
Load may be greater than
capacity.
Decrease load.
Thermal Alarm LED is not
lit.
Load is not greater than
capacity.
Rectifier may need to be
reset.
Turn the On/Standby
switch to the Standby
position and then on again.
a. Rectifier restarts.
Check plant voltage and
adjust as required.
b. If rectifier does not
restart, replace it.
Standby LED is not lit.
Green (normal) LED is lit.
Circuit breakers not
operated.
Operate circuit breaker.
Standby LED is not lit.
Green (normal) LED is lit.
Circuit breaker is on.
Defective rectifier
Replace rectifier.
Standby LED is lit.
Power switch may be in
the Standby position.
Turn power switch on.
