Why do you want to replace the unit? Is repairing the Panelview a option? If so then contact Delta Automation, or do a search for repair facilities on the web, you can find several that could service this unit.
George Myers
www.deltaautomation.com
scmguru,
Sorry I came in so late on this one, I just saw your post. My first instinct on this problem is to check the drive output with an O-scope. Look for a properly formed square wave.
From my experience working on the G5 series drives the gate driver section can start to fail and cause...