Maintenance
Troubleshooting
290 MagneMotion
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
The motor reports an overvoltage
fault.
Power being supplied to the
QSHT inverter is above +830V
DC. See Overvoltage Fault on
page 246.
The fault clears once the power
bus drops below +820V DC.
Verify the voltage output from the
power supply.
Verify the voltage at the motor.
Reduce power cable resistance
between motors that share a com-
mon HVDC power supply.
Reduce maximum speed and/or
maximum acceleration to reduce
the amount of regenerated power
that flows back into the system.
Increase the spacing between
vehicles on motors that share a
common HVDC power supply.
Connect more motors to a com-
mon HVDC power supply to
increase the number of blocks
available to absorb regenerated
power.
Table 8-3: Power-Related Troubleshooting (Continued)
Symptom Problem Description Corrective Action
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