Most of Heidelberg CtF and CTP have a diag program.
You can look the documentation or things that come with the machine like CD/DVD.
Like Primesetter/Suprasetter, they have a GUI (User interface) and the installer was came with the machines (a CD/DVD). Inside you can find the diagnostic software. You can install it yourself and remember mostly, you need a serial connection to work with this diagnostic software.
For the old CtF products, they have their own disks. Serial connection, you need to make your own.