I did some reading today about Postscript Query conventions in the Adobe PS Reference Manual. The opening paragraph states;
"A query is any Postscript language program segment that generates and returns information back to the host computer before a document can be formatted for printing."
It goes on to mention that the function of the query is to check the availability of resources and printer features on Postscript printers. But it also says that there is provision for devices that cannot understand Postscript and that this determination is based on the PPD used and the printer itself.
So what you have is a combination of a new operating system and an old PCL only printer (the iR1600 was first sold in 2002). A modern PCL only printer, such as the LBP6750 that I've been using for testing, knows not to print the PS query. But I would say that the iR1600 does not have this programming and that is why it prints the PS query instead of ignoring it. If you had the Postscript module in the iR1600 then there would be no output of this query page. But your chances of obtaining one of those modules know would be slim.
In conclusion there is nothing you can do now that will stop this page. It is built into the operating system and the iR1600 does not know how to handle the query. Might be time to get a new copier/printer. Or check the web for someone selling an iR1600/1610/2000/2010. It may have the PS Module B1 which will solve the problem.
Good luck.