Oki C 5400n - Manual (Page 127)

Troubleshooting • 125
YYYY
nnn : FATAL ERROR
An error has
occurred which
requires service.
YYYY = the general
cause. nnn = error
number. 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.
Message Meaning What to Do