180 Rockwell Automation Publication 750-TG101A-EN-P - June 2022
Appendix A Start Up After Repairs
No-load DC Bus Voltage and
Output Current
Measurements
Follow theses steps to measure the DC bus voltage and output current and
diagnose problems without connecting the motor to its mechanical load.
1. Verify that the input power and ground wires are connected to the
proper terminals.
2. Verify that the AC line power at the disconnect device is within the rated
value for the drive.
3. Verify that the control power voltage is correct.
4. Verify that the motor cables are connected to the proper terminals.
5. Verify that the motor load is disconnected.
6. Energize the system.
7. Measure the DC bus voltage and verify that the measured value is
displayed in port 0, parameter 3 [DC Bus Volts].
8. Start the system and increase the speed from zero to base speed.
9. Measure the system output current and verify that the measured value is
displayed in port 10, parameter 3 [Output Current].
10. Stop the system.
11. Reconnect the load to the motor before proceeding with drive startup.
For startup information see the PowerFlex Drives with TotalFORCE® Control
Programming Manual (firmware revision 10.xxx and later),
publication 750-PM101
.
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