Error messages – Brother MFC-8660DN User Manual
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116
Error messages
C
As with any sophisticated office product, errors may occur. If this happens, your machine will 
identify the error and display an error message. The most common error messages are shown 
below.
Error Message
Cause
Action
Check Paper 
Size
Paper is not the correct size.
Load the correct size of paper (Letter, Legal, A4 
or Folio) and then set the “Paper size” 
(Menu
,
1
,
3) and “Tray Use in Fax Mode”
(Menu
,
1
,
7
,
2), See Paper Size on page 19 and
Tray use in Fax mode on page 20.
Comm.Error
Poor phone line quality caused a 
communication error.
Send the fax again or connect the machine to 
another telephone line. If the problem continues, 
call the telephone company and ask them to 
check your phone line.
Connection 
Fail
You tried to poll a fax machine that 
is not in Polled Waiting mode.
Check the other fax machine’s polling setup.
Cooling Down
Wait for a 
while
The temperature of the drum unit or 
toner cartridge is too hot. The 
machine will pause its current print 
job and go into cooling down mode. 
During the cooling down mode, you 
will hear the cooling fan running 
while the LCD shows Cooling 
Down, and Wait for a while.
Make sure that you can hear the fan in the 
machine spinning and that the exhaust outlet 
isn't blocked by something.
If the fan is spinning, remove any obstacles that 
surround the exhaust outlet, and then leave the 
machine turned on but do not use it for several 
minutes.
If the fan is not spinning follow the suggestions 
below.
Turn off the machine's power switch and then 
turn it on again. If the error message continues 
leave the machine for several minutes and then 
try it again. (The machine can be turned off for 
up to 4 days without losing faxes stored in the 
memory.)
Cover is Open The front cover is not closed
completely.
Close the front cover of the machine.
The fuser cover is not closed 
completely or the paper is jammed 
at the fuser unit.
Open the back cover, and then open the fuser 
cover. Remove the jammed paper if there is any, 
and then close the fuser cover and the back 
cover.
Disconnected
The other person or other person’s 
fax machine stopped the call.
Try to send or receive again.
Document Jam
The document was not inserted or 
fed properly, or the document 
scanned from the ADF was too 
long.