ACS150 show A5031 in display in local mode when press start button. The output connection haven connected to the drive, the drive can be press start/ run without connection to motor ? Will it be the issue cause they didnt connect it to motor during testing.
The alarm A5031 indicates the drive is not ready, probably due to the incorrect voltage of the DC bus from which the power supplies for the control logic are also obtained.
Check the value of the input power supply and you can also start the drive without having connected the motor, if the error recurs, due to the modest cost of the drive, you should change it, or if it is still under warranty, contact your dealer for have it replaced.