HP LaserJet Enterprise flow M830 Multifunction Printer series - Manual (Page 193)

A one-page fax prints as two pages
The fax header is being appended to the top of the fax, pushing text to a second page.
To print a one page fax on one page, set the overlay header to overlay mode, or adjust the fit-to-page
setting.
A document stops in the document feeder in the middle of faxing
A jam is in the document feeder.
Clear the jam, and send the fax again.
The volume for sounds coming from the fax accessory is too high or too low
The volume setting needs to be adjusted.
Adjust the volume in the Fax Send Settings menu and the Fax Receive Settings menu.
ENWW Solve fax problems 183