Rockwell Automation SP500 AC Drive Installation and Operation Manual - Manual (Page 94)

9-4 SP500 AC Drive Installation and Operation Manual Version 3.1
The DC bus voltage has fallen below the electronic trip low threshold level. Note that the fault will not clear
until the linput line voltage is within the proper range. This may take a few seconds.
Important: If a line dip or momentary power loss occurs and the DC bus is able to rise back to the proper
level within 500 ms, the drive will automatically restart (if the drive was running when the fault
occurred).
Possible Cause Corrective Action
Loss of input power. Check incoming power.
Low line voltage. Check incoming power. Install an isolation
transformer if required.
The drive’s 200% current rating has been exceeded.
Possible Cause Corrective Action
Short in the drive outputs. Verify that the drive’s input and output wiring are
properly connected. Refer to chapter 5.
Ground fault condition. Verify that the drive’s input and output wiring are
properly connected. Refer to chapter 5.
Verify that the output wiring to the motor is not
connected to ground or any other voltage source.
Refer to chapter 5.
Instantaneous overcurrent resulting in 200% rated
drive current. Increase the acceleration time in F-01 or the
deceleration time in F-02. Refer to chapter 8 for
parameter descriptions.
Adjust the current limit level in F-05 if it is too low or
too high relative to the load. Make the adjustments in
5% increments.
The internal thermostat detected excessive temperatures in the drive. Note that the fault will not clear until
the internal drive temperature is back within range. This may take a few seconds.
Possible Cause Corrective Action
The drive’s operating specifications have been
exceeded. Check the application and change the carrier
frequency in F-10. Refer to chapter 8 for the
parameter description.
The ambient operating temperature of the drive has
been exceeded. See Appendix A. Check the temperature at the installation site. Move
the drive to a cooler location.
LU
= LOW BUS VOLTAGE
DC
= OVERCURRENT
OH
= THERMOSTAT / DRIVE OVERLOAD