$Summary says it all, currently kde-print-manager does not support plasma5 at all.
Initial port of kde-print-manager is in frameworks branch and needs testing. It should basically work, but I believe there will be some issues introduced during the port to KF5/Plasma5.
kde-print-manager-15.03.95-1.fc22 has been submitted as an update for Fedora 22. https://admin.fedoraproject.org/updates/kde-print-manager-15.03.95-1.fc22
Package kde-print-manager-15.03.95-1.fc22: * should fix your issue, * was pushed to the Fedora 22 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kde-print-manager-15.03.95-1.fc22' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-4942/kde-print-manager-15.03.95-1.fc22 then log in and leave karma (feedback).
Package kde-print-manager-15.03.95-2.fc22: * should fix your issue, * was pushed to the Fedora 22 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing kde-print-manager-15.03.95-2.fc22' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2015-4942/kde-print-manager-15.03.95-2.fc22 then log in and leave karma (feedback).
kde-print-manager-15.03.95-2.fc22 has been pushed to the Fedora 22 stable repository. If problems still persist, please make note of it in this bug report.