Lucent Technologies Lineage
®
2000 125A Ferroresonant Rectifier J85502C-1
7 - 6 Troubleshooting and Adjustments
Issue 8 July 1999
problem has been cleared. Otherwise, continue this
procedure.
8. If the rectifier output voltage is the plant voltage and/or all
rectifiers shut down, then use the following procedures.
a. If the CM2 control board has not been replaced, then
replace it at this time per “Replacing CM2 Control
Board” in Section 8.
b. If the rectifier started, minor alarm on the controller
cleared, and the rectifier RFA LED went out, then the
RFA problem has been cleared. Otherwise, continue
the procedure.
c. If replacing the CM2 control board does not clear the
problem, then windings 11 and 12 of T1 may be open.
Try the following:
–
Check the wiring to the thyristor. (See Figure 5-3.)
–
Check for defective thyristor. Replace, if defective,
per “Thyristor (Q1)” in Section 8.
Clear Fuse
Alarm (FA)
1. Check to see if the DC OUTPUT circuit breaker (CBA1)
tripped Off (down). If so, turn the POWER switch Off
and then back On. Then turn CBA1 back On (up).
2. If CBA1 did not trip off, check fuses +V and –V. These
fuses, accessible by opening the door of the rectifier, are
located to the left of the OUTPUT VOLTS ADJ and
EQUAL ADJ potentiometers.
3. If the +V or –V fuse is blown, check for possible trouble
and replace the fuse.
Calibrate CM3
Digital Meter
Refer to Figures 5-3 and 7-2.
1. Loosen the locking screws and open the door of the
rectifier.
Note
Calibration is not feasible unless the DMM test meter has an
accuracy of ±0.02 percent or better.
