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Troubleshooting
9.5
Low Heat Error There is a problem in
the fuser unit.
Unplug the power cord and
plug it back in. If the problem
persists, please call for
service.
Open Heat Error
[Over Heat]
Group Not
Available
(only for SCX-
4521F/ SCX-
4521FR)
You have tried to
select a group location
number where only a
single location
number can be used,
such as when adding
locations for a
broadcast operation.
Use a speed dial number or
dial a number manually using
the number keypad.
[Incompatible]
(only for SCX-
4521F/ SCX-
4521FR)
The remote machine
did not have the
requested feature,
such as a delayed
transmission.
This message also
occurs if the remote
machine does not
have enough memory
space to complete the
operation you are
attempting.
Reconfirm the remote
machine’s features.
[Line Busy]
(only for SCX-
4521F/ SCX-
4521FR)
The receiving party
did not answer or the
line is already
engaged.
Try again after a few minutes.
[Line Error]
(only for SCX-
4521F/ SCX-
4521FR)
Your machine cannot
connect with the
remote machine or
has lost contact
because of a problem
with the phone line.
Try again. If the problem
persists, wait an hour or so
for the line to clear and try
again.
Or, turn the ECM mode on.
See “ECM Mode (Error
Correction Mode)” on
page 7.14.
Load Document You have attempted
to set up a copy or fax
operation with no
document loaded into
the ADF.
Load a document into the ADF
and try again.
[LSU Error] A problem has
occurred in the LSU
(Laser Scanning Unit).
Unplug the power cord and
plug it back in. If the problem
persists, please call for
service.
Memory Dial Full
(only for SCX-
4521F/ SCX-
4521FR)
The fax jobs queue in
the memory is full.
Cancel unnecessary fax jobs
in the memory.
Display Meaning Suggested solutions
Memory Full
(only for SCX-
4521F/ SCX-
4521FR)
The memory is full. Delete unnecessary
documents and retransmit
after more memory becomes
available. Alternatively, split
the transmission into more
than one operation.
[No Answer]
(only for SCX-
4521F/ SCX-
4521FR)
The receiving fax
machine has not
answered after
several redial
attempts.
Try again. Make sure that the
receiving machine is
operational.
[No Cartridge] The toner cartridge is
not installed.
Install the toner cartridge.
See “Installing the Toner
Cartridge” on page 2.2.
Not
Assigned
(only for SCX-
4521F/ SCX-
4521FR)
• The speed dial
location you tried to
use has no number
assigned to it.
• The ID you entered
is not assigned
.
• Dial the number manually
using the number keypad or
assign the number. For
storing a number, see
“Automatic Dialing” on
page 7.8.
• Enter the correct ID.
.
[No Paper]
Add Paper
The paper in the tray
has run out.
Load paper in the tray. See
“Loading Paper” on page 2.3.
Operation
Not Assigned
(only for SCX-
4521F/ SCX-
4521FR)
You are doing the
Add/Cancel operation,
but there are no jobs
waiting.
Check the display to see if
there are any scheduled jobs.
The display should indicate
them in Standby mode; for
example, Delay Fax.
Out of Range The current date and
time you entered is
not correct
.
Enter the correct date and
time
.
[Paper Jam 0]
Open/Close Door
Paper has jammed in
the feeding area of
the tray.
Clear the jam. See “In the
Tray” on page 9.2.
[Paper Jam 1]
Open/Close Door
Paper has jammed in
the fuser area or
around the toner
cartridge.
Clear the jam. See “In the
Fuser Area or Around the
Toner Cartridge” on page 9.3.
[Paper Jam 2]
Check Inside
Paper has jammed in
the paper exit area.
Clear the jam. See “In the
Paper Exit Area” on page 9.3.
[Power Failure] Power has turned off
then on and the
machine’s memory
has not been saved.
The job which you were trying
to do before the power failure
must be completely re-done.
Display Meaning Suggested solutions