So here the links to the version compatibility pages for ArcFM and Responder 10.2:
And here are the links to version compatibility pages for ArcFM and Responder 10.2.1a/b:
And finally, the compatibility page for ArcGIS 10.2.x: System Requirements
To give you the short version: ArcGIS 10.2 is compatible with Windows Server 2012 and HyperV, but ArcFM/Responder 10.2 are not. You'd have to upgrade ArcGIS 10.2.1 and ArcFM/Responder 10.2.1a or b to be compatible with Windows Server 2012 R2.