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C5100 Troubleshooting • 141
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.
Message Meaning What to Do