Sharp MX-2314N Service Manual page 471

G. Web life end detection
The web life near end is detected by the web print counter. When
the life reaches 120K prints, the following message is displayed to
notify that the replacement timing is approaching.
(Maintenance required.: FK3)
The web life end is detected by the web end detector. When the life
end is detected, a job is forcibly interrupted even the job is being
performed.
After replacing the web with a new one, reset the web life counter
and the web send counter to clear the life end state.
MX-3114N OPERATIONAL DESCRIPTIONS 13 – 51