Rockwell Automation AK DBU - Dynamic Braking Unit 600/690 VAC - Manual (Page 23)

Chapter
2
Start Up / Troubleshooting
This chapter provides the necessary information for the start up and
troubleshooting of the DBU.
For information on . . . See page . . .
Start-Up 2-2
DC Power ON LED 2-3
Troubleshooting 2-4
!
ATTENTION: Power must be applied to the connected drive(s) to
perform the following start-up procedure. Some of the voltages present
are at dangerous level. To avoid electric shock hazard or damage to
equipment, only qualified service personnel should perform the
following procedure. Thoroughly read and understand the start up and
troubleshooting procedures before beginning. If an event does not occur
while performing these procedures, Do Not Continue. Remove Power
including user supplied control voltages. User supplied voltages may
exist even when main AC power is not applied to the drive(s). Correct
the malfunction before continuing.
!
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.
!
ATTENTION: Disabling the drive does not stop the AC line from
being rectified. Full potential will still be present on the DC bus. A
failure of the IGBT will result in brake resistor failure. The AC line
must be disconnected from the drive.