Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
7 - 4 Troubleshooting and Adjustments
Issue 10 July 2000
5. Rectifier gives Phase
Alarm.
1. One of the phase
voltages is too low under
a load condition.‘
1. Check connections and voltage at
contactor.
2. One of the phase
voltages coming into
CM2 is too low.
2. Verify that the voltages across C9,
C10, and C11 are equal to ± 2 volts.
3. CM2 is defective.
3. Replace CM2.
6. Rectifier goes into high
voltage at turn-on.
1. Float Adj
potentiometer is set too
high.
1. Turn Float Adj potentiometer all
the way counterclockwise. Hold
meter selector switch in Rect V
position and turn potentiometer
clockwise until the rectifier shuts
down. Note at what voltage this
occurs.
2. Internal selective high
voltage shutdown
(ISHVSD) may be set too
low.
2. Verify ISHVSD is set to 58 volts.
3. CM2 is defective.
3. If the rectifier did not shut down
at the BUHVSD setting, replace
CM2.
4. If the rectifier did shut down
within the limits specified, rotate the
potentiometer one full turn
counterclockwise. Turn the rectifier
Power switch Off, then back On.
(rectifier restarts.)
7. Rectifier gives RFA alarm
at certain loads.
1. CM2 is defective.
1. Replace CM2. Verify that the
rectifier is on and delivering at least
2 1/2% of its rated output current (if
not connected to batteries). See
Problem 5.
2. Defect in control and
alarm leads from fuses to
CM2.
2. Check alarm leads.
3. Check for +27Vdc (±5V) across
C4 on CM2.
Table 7-A: Troubleshooting
Problem
Probable Cause
Probable Corrective Action
