Rockwell Automation 20G PowerFlex SCR Bus Supply - Manual (Page 35)

PowerFlex SCR Bus Supply User Manual
Publication 20S-UM001G-EN-P
Chapter 2
Start Up/Troubleshooting
This chapter provides the necessary information for the start up and
troubleshooting of the PowerFlex SCR Bus Supply.
Topic Page
Start-Up 2-2
Precharge Board LED Indicators 2-4
Troubleshooting 2-6
!
ATTENTION: Power must be applied to the SCR Bus Supply
and the Inverter to perform the following start-up procedure. Some
of the voltages present are at incoming line potential. To avoid
electric shock hazard or damage to equipment, only qualified
service personnel should perform the following procedure.
Thoroughly read and understand the procedure before beginning.
If an event does not occur while performing this procedure, do not
proceed. Remove power including user-supplied control voltages.
User-supplied voltages may exist even when main AC power is not
applied to the Bus Supply. Correct the malfunction before
continuing.
!
ATTENTION: When operating the SCR Bus Supply, a minimum
of one 7.5 kW (10 HP) PowerFlex 700/700S Inverter must be
connected to the DC bus—otherwise the internal fault detection
circuit will interpret the condition as an Output Voltage Loss and
stop pulse firing. This is indicated on the Precharge Board by the
Alarm LED (7 flashes) and after 30 seconds by the Fault LED (2
flashes). Refer to
Table 2.A and Table 2.B .
!
ATTENTION: Second source of power for cooling blower is
present. To avoid an electric shock hazard or moving blades, verify
the AC power supply has been removed prior to performing any
maintenance or repairs.