Low voltage trip (LVT) occurs but input voltage is normal.

Low voltage trip (LVT) occurs but input voltage is normal.

Compare the values of the VFDs measured DC Link Voltage and the measured DC Link Voltage. Measure actual on P and N terminals with a multimeter.
The VFDs measured DC voltage is displayed at different locations depending on the VFD series. Refer to the below.

The M100, G100, and smaller S100's will list voltage at the "dCL" screen


The iS7, H100, and S100's with the LCD keypad require programming the voltage to be displayed.  Set CNF20=6 DC Link to display the voltage on the top right of the keypad.

Normal DC link voltage on a 230VAC VFD is 320VDC
Normal DC link voltage on a 480VAC VFD is 680VDC

If there is a big difference between the two voltages, it can be capacity setting problem. Call your local LS person. If there is a small difference, initialize all parameters at CNF-40 or dr.93. Lastly, check the connector of the control board. It could also be possible that the VFD is damaged internally and needs to be further analyzed.