Adam,
The LDU-20 configuration can be backed up to a USB memory device (thumb drive) and then upload the settings into the replacement LDU-20. I believe it is possible to upload and download to the LDU-20 through the WECsPlorer software also but I believe that depends on the User rights that Wartsila has given you.
We have not experienced an LDU-20 Failure but they have only been in service for approximately 14 months.
Mike Prindle