Lucent Technologies Lineage
®
2000 125A Ferroresonant Rectifier J85502C-1
7 - 4 Troubleshooting and Adjustments
Issue 8 July 1999
Adjustments
This section includes procedures to check fuses (Clear RFA),
calibrate the digital meter, adjust the isolated current measuring
circuit, and adjust the current limit.
Clear Rectifier
Failure Alarm
(RFA)
Refer to Figures 5-4 and 7-1.
1. Observe and record the status of the fuses in the plant
controller.
2. Turn the rectifier POWER switch Off.
3. If any fuses are blown, replace them with one of the same
type and capacity. Check and -V fuses located on the
control panel inside the rectifier door. On List C rectifiers,
4. Control panel digital
meter does not light.
1. Defective wiring to
CM3 digital meter board.
2. CM3 board is
defective.
3. CM2 board is
defective.
1. Check wiring to CM3
board. Check connectors J1B
on CM3 and J3A on CM2 for
proper insertion.
2. Replace CM3 per
“Replacing CM3 Digital Meter
Board” in Section 8 and then
calibrate per “Calibrate CM3
Digital Meter Board” in this
section.
3. Replace CM2 per
“Replacing CM2 Control
Board” in Section 8.
5. POWER LED is on; ac is
good; rectifier output
voltage is zero.
1. Open ac contactor coil
or contactor not making
contact.
1. Turn Off power at ac service
panel and measure contactor
coil resistance. If it is open,
replace contactor/coil.
6. Rectifier output voltage is
low, not adjustable, and
power is On.
1. Defective CM2.
2. Shorted triac.
1. Replace CM2 per
“Replacing CM2 Control
Board” in Section 8. Verify
that output voltage is
adjustable. If not, replace triac
per “Thyristor (Q1)” in Section
8.
Table 7-A: Troubleshooting
Problem
Probable Cause
Probable Corrective Action
