Rockwell Automation Liqui-Flo 1.5 General Purpose and Vector Duty - Manual (Page 115)

Troubleshooting the Drive 5-1
C
HAPTER
5
Troubleshooting the Drive
The LiquiFlo 1.5 AC drive provides the following ways to determine the status of the
drive and to troubleshoot problems that may occur:
• Ready LED on the drive cover
• User-configurable and non-configurable alarms
• User-configurable and non-configurable faults
• Entries in the fault queue
• Drive status parameters
5.1 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 5 minutes.
Step 2. Remove the drive’s cover.
Step 3. Verify that there is no voltage at the drive’s input power terminals.
Step 4. Measure the DC bus potential with a voltmeter while standing on a
non-conductive surface and wearing insulated gloves. Refer to figure 5.1.
Step 5. Once the drive has been serviced, reattach the drive’s cover.
Step 6. Reapply input power.
!
ATTENTION:Only qualified electrical 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 disconnecting input power, wait five
(5) 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.