Troubles with my Panasonic Workio DP-1820E

[alfpanasonic]

u15

U15 = no wast toner

The machine have a pcb board Fax?

If yes in user parameters you can change the language ( 005 = 020)

Hi, I received a Panasonic Workio DP-1820E as a part of a chinese donative. All menus and keys are in chinese language and when I try to make a copy the display shows a chinese message + U15 code....I don't know what todo. Does anyone know at least how to change the language or what to do for the Panasonic to working fine?...thanks in advanced...