I'm using alfresco community edition 5.2.4 5.2.f (manually installed). When I upload a document and mouse over it, I can see in the logs "Failed to perform ImageMagick transformation" and "convert.exe FailedToExecuteCommand "gswin32c.exe"
I know that ImageMagick needs ghost script to convert a PDF to a PNG, but I'm confused why I need ImageMagick at all if I have alfresco-pdf-renderer configured.
You specified in your original question that you were using Alfresco Community 5.2.4 - such a version does not exist. Community never uses a version with three numeric elements. Any Community 5.2 version will display 5.2.0 because the single letter is only a "label" and not reflected in the version number. Only the schema version may be different (but isn't guaranteed to be).
Glad you figured out this is a limitation of the 5.2.f version, which did not yet contain the functionality to call the pdfrenderer utility.