This post describe the vrdy alarm in detail and looks like it's come from a Fanuc maintenance manual:viewtopic.php?f=4&t=3413
Is the control type 0-T model A,B or C?
I'd do an internet search for manuals that will be relevant, there will be Maintenance manuals for control/drives/parameters and connection manuals and drive connection / maintenance manuals. We can't publish any of the older manuals.
eg Fanuc book number 61395e is Fanuc 0M 0T C Maintenance Manual