Rockwell Automation 2090 Ultra3000 Installation Manual - Manual (Page 130)

Publication 2098-IN003E-EN-P — April 2004
4-2 Troubleshooting Status Indicators
Safety Precautions Observe the following safety precautions when troubleshooting your
Ultra3000 drive.
ATTENTION
!
DC bus capacitors may retain hazardous voltages
after input power has been removed. Before
working on the drive, measure the DC bus voltage to
verify it has reached a safe level or wait the full time
interval listed on the drive warning label. Failure to
observe this precaution could result in severe bodily
injury or loss of life.
Do not attempt to defeat or override the drive fault
circuits. You must determine the cause of a fault and
correct it before you attempt to operate the system. If
you do not correct a drive or system malfunction, it
could result in personal injury and/or damage to the
equipment as a result of uncontrolled machine
system operation.
Test equipment (such as an oscilloscope or chart
recorder) must be properly grounded. Failure to
include an earth ground connection could result in a
potentially fatal voltage on the oscilloscope chassis.