Rockwell Automation RELIANCE ELECTRIC SP500 - CHAPTER 9 Troubleshooting Reference; 9.1 Verifying DC Bus Voltage

9.1
Troubleshooting Reference
ATTENTION: Only qualified electrical personnel familiar with the
construction and operation of this equipment and the hazards involved
should install, adjust, operate, and/or service this equipment. Read and
understand this manual in its entirety before proceeding.
The SP500 drive is monitored by internal diagnostics. If a fault occurs, the drive
displays a two-digit fault code to identify the problem. A fault causes the drive to coast
to rest if it is running or prevents the drive from starting if it is stopped. The fault code
is also entered into the error log.
This chapter defines the fault codes and suggests actions to correct problems. It also
describes how to access and clear the error log.
Refer also to the F-26 (Auto-Restart Number of Attempts) parameter description in
chapter 8. This describes the drive’s reaction to drive faults if the auto-restart feature
is enabled (F-26 # 0).
Important: Before servicing the drive, verify that the DC bus capacitors have
discharged as described in section 9.1. Use an isolated multimeter to
measure the DC bus voltage and to make resistance checks. Note that
dedicated troubleshooting test points are not provided.
Verifying DC Bus Voltage
ATTENTION: DC bus capacitors retain hazardous voltages after input
power has been disconnected. After disconnecting input power, wait five
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.
The SP500 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, lock out, and tag input power to the drive. Wait five 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 voltage at the DC bus power terminals with a multimeter
while standing on a non-conductive surface and wearing insulated gloves
(600V). See figures 9.1 to 9.3. Once the drive has been serviced, reattach
the drive’s cover and reapply input power.
Troubleshooting Reference
9-4