Rockwell Automation MagneMotion QuickStick HT User Manual page 289

Symptom
The motor reports an undervolt-
age fault.
The motor reports an overvoltage
fault.
QuickStick HT User Manual
Table 8-3: Power-Related Troubleshooting (Continued)
Problem Description
Power being supplied to the
QSHT 5700 inverter is below
+350V DC. See
Fault on page
Power being supplied to the
QSMC controller is above +430V
DC. See Overvoltage Fault on
page 244.
Rockwell Automation Publication MMI-UM007F-EN-P - September 2020
Verify the voltage output from the
power supply.
Undervoltage
Verify the voltage at the motor.
246.
Verify that all power wiring is
sufficient to carry all loads and
deliver the proper power to the
motors.
Reduce power cable resistance
between motors that share a com-
mon HVDC power supply.
The fault clears once the power
bus rises above +350V DC.
The fault clears once the power
bus drops below +420V 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.
Maintenance
Troubleshooting
Corrective Action
289