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Troubleshooting 9-1
CHAPTER 9
Troubleshooting
The VS1MD constantly monitors its status and provides the following ways to
determine the status of the drive and to troubleshoot problems that may occur:
• LEDS on the drive
• Fault Codes displayed on seven segment display
• Drive monitor and status parameters
• Entries in the fault queue
9.1 Verifying that DC Bus Capacitors are Discharged
Before Servicing the Drive
The drive’s DC bus capacitors retain hazardous voltages after input power has been
disconnected. Perform the following steps before touching any internal components:
Step 1. Turn off and lock out input power. Wait 10 minutes after drive’s 7-segment
display goes blank.
Step 2. Open the drive’s cover.
Step 3. Verify that there is no voltage at the drive’s input power terminals.
Step 4. Once the drive has been serviced, reattach the drive’s cover.
Step 5. Reapply input power to the drive.
!
ATTENTION: This drive contains high voltage capacitors that take
time to discharge after removal of mains supply. Before working on the
drive, ensure isolation of mains supply from line inputs. Wait ten (10)
minutes for capacitors to discharge to safe voltage levels. Failure to
observe this precaution could result in severe bodily injury or loss of life.
ATTENTION: Only qualified electical personnel familiar with the
construction and operation of this equipment and the hazards involved
should install, adjust, operate, or service this equipment. Read and
understand this manual and other applicable manuals in their entirety
before proceeding. Failure to observe this precaution could result in
severe bodily injury or loss of life.
!
ATTENTION: DC Bus capacitors retain hazardous voltages after input
power has been disconnected. After disconnectiong input power, wait ten
(10) minutes for the DC Bus capacitors to discharge and then check the
voltage with a voltmeter to ensure the DC bus capacitors are discharged
before touching any internal components. Failure to observe this
precaution could result in severe bodily injury or loss of life.