C5500n User's Guide

Chapter C Troubleshooting
Display Panel Messages

MessageMeaningWhat to Do
* TONER SENSOR ERRORFlashes across the second line of the display: the indicated color toner (*) is missing from
the printer.
Open the top cover and make sure the indicated toner is there
and properly seated in the printer: C = Cyan, Y = Yellow, M =
Magenta, K = Black.
ADD MORE MEMORY
420: MEMORY OVERFLOW
The document size is too large for the printer's memory.Reduce the size of the document. If this happens frequently,
install additional memory (see "RAM Memory", in Chapter A)
CANCELLING JOB
(JAM)
The setting for Jam Recovery in the menu has been changed to off and a paper jam has
occurred. Any unprinted data is
being deleted.
Clear the jam and resend the missing pages of the print job.
CHECK BELT
330: BELT MISSING
The belt unit is not properly installed.Open the top cover and lift out the black (K) and Yellow (Y)
image drums, placing them on a flat surface. Check to be sure that the belt unit latches are fully in the latched position: then reinstall the image drums.

CHECK FUSER
320: FUSER MISSING
The fuser unit is not properly installed.Open the top cover and check to be sure that the fuser unit is
properly seated in the printer and that the lock levers are pushed all the way toward the back of the printer:
CHECK MP TRAY
390: PAPER JAM
Paper has jammed while exiting the MP Tray.Clear the jam. See "Jam 390", in this chapter.
CLOSE COVER
316: DUPLEX COVER OPEN
The duplex cover is open or not properly latched.Close the duplex cover:

CLOSE COVER
nnn: COVER OPEN
Either the top cover or the front cover is open.Be sure both the top cover and the front cover are firmly
closed.
INSTALL PAPER CASSETTE
430: TRAY 1 MISSING
Tray 1 is not installed in the
printer.
Install the missing tray.
INSTALL PAPER CASSETTE
440: TRAY 1 OPEN
Tray 1 is not properly installed in the printer.Make sure the tray is pushed fully into the printer.
LOAD mmm AND PRESS
ONLINE SWITCH
490: MP TRAY EMPTY
Print job from MP Tray has been received and the MP
Tray is empty.
Load the requested media (mmm) in the MP Tray and press
ON-LINE.
LOAD mmm
nnn: tttt EMPTY
A print job has been received and the indicated paper tray
is empty.
Load mmm media in the indicated (tttt) tray.
LOAD mmm/ppp AND PRESS
ONLINE SWITCH
nnn: tttt MEDIA MISMATCH
The media type in the indicated tray (tttt) does not
match that specified in the print job being processed.
Load the appropriate media in the tray and press ON-LINE.
LOAD mmm/ppp AND PRESS
ONLINE SWITCH
nnn: tttt SIZE MISMATCH
The media size (mmm) and/or type (ppp) loaded in the
indicated tray (tttt) does not match that specified in the print
job being processed.
Load the appropriate media in the tray and press ON-LINE.
OPEN DUPLEX COVER
nnn: PAPER JAM
Paper has jammed entering or exiting the duplexer.Clear the jam. See Jam 370, 373 and 383 in this chapter.
OPEN FRONT COVER
nnn: PAPER JAM
Paper jam.Clear the jam. See Jam 372 and 380 and Jam 391 and 392 both in this chapter.
OPEN TOP COVER
nnn: PAPER JAM
Paper jam.Clear the jam. See Jam 382 and Jam 381 both in this chapter.
ORDER xxxAppears on the second line of the display to indicate that consumable xxx (e.g., belt, fuser, toner, image drum) is nearing end of life.Make sure you have a replacement unit on hand.
POWER ON/OFF
300: NETWORK ERROR
An error has occurred involving
the network.
Shut the printer off, then turn it back on. If the message still
appears, check with your network administrator.
PRESS ONLINE SW
INVALID DATA
The printer has received invalid data.Press ON-LINE.
Reprocess and resend the print job.
REPLACE TONER
nnn: * TONER EMPTY
The indicated toner needs replacement.Replace the indicated toner:
410: Y = Yellow
411 M = Magenta
412: C = Cyan
413: K = Black
REPLACE yyyy
nnn: yyyy LIFE
The indicated component is
nearing end of life and should be replaced.
Replace the indicated component: YYYY = Fuser, Belt, C Drum, Y Drum, M Drum, K Drum.
tttt EMPTYAppears on the second line of the display to indicate that ttt tray has run out of media.Load media in tray tttt.
xxx LIFEAppears on the second line of the display to indicate that consumable xxx (e.g., belt, fuser, image drum) will need to be replaced soon.Replace the indicated item.
YYYY
nnn: FATAL ERROR
An error has occurred which
requires service.
YYYY = the general cause. nnn = error number.
Try turning off the printer then turning it back on. If this does
not remedy the problem, write down the message including
the error number "nnn," then call your authorized Oki Data
Service Dealer for service.

Note: If you see a series of octets containing letters and
numbers scrolling across the display, be sure to write these
down also and report them to the Service Dealer.