Rockwell Automation Allen-Bradley PowerFlex SCR, User Manual

Page: 38 / 68

2-4 Start Up/Troubleshooting
PowerFlex SCR Bus Supply User Manual
Publication 20S-UM001G-EN-P
Precharge Board LED
Indicators
The three LEDs on the Precharge Board are visible through a small slot in
the SCR Bus Supply cover. The 400A unit cover has one slot. The 600A
unit cover has two slots but only the lower slot is used to view the LEDs.
Since the Precharge Board for the 1000A unit is mounted either on the
lower carrier plate (on Single Units) or on the upper carrier plate (on Master
Units), the corresponding lower or upper slot is used to view the LEDs. For
slot locations, see
Figure A.1 on page A-3 .
Figure 2.1 Location of LED Indicators and Jumpers on the Precharge Board
!
ATTENTION: The SCR Bus Supply LEDs are only operational
when the unit is energized. Servicing energized equipment can be
hazardous. Severe injury or death can result from electrical shock,
burn, or unintended actuation of the controlled equipment. Follow
safety-related practices of NFPA 70E, Electrical Safety For
Employee Workplaces. DO NOT work alone on energized
equipment!
SPARE
2
(Ramp-Up)
Precharge Board
Firmware Version Label
(SCR and
RGU/AFE
Paralleling)
Slow Norm
Yes No
1-ph 3-ph
SPARE
1
LINE
TYPE
POWER
OK
ALARM LEDs
Jumpers sho
wn in
def
ault positions
FAULT