Brother Copier/Printer MFC-9970CDW - Manual (Page 116)

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Condensation
One of the issues that can
cause this error is that
condensation may form inside
the machine after a room
temperature change. Leave the machine powered on, and fully
open the front cover. Wait 30 minutes, switch
OFF and close the cover, then switch ON. If
this does not clear the error, call Brother
Customer Service.
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
is not 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, disconnect the
machine from the power for several minutes,
then reconnect it.
Cover is Open.
The front cover is not completely
closed. Close the front cover of the machine.
Cover is Open
The ADF cover is not completely
closed. Close the ADF cover of the machine.
The ADF is open while loading a
document. Close the ADF cover of the machine, then
press Stop/Exit.
Cover is Open
The fuser cover is not
completely closed or paper was
jammed in the back of the
machine when you turned on
the power.  Close the fuser cover of the machine.
 Make sure paper is not jammed inside the
back of the machine, and then close the
fuser cover and press Black Start or
Color Start.
DIMM Error
 The DIMM is not installed
correctly.
 The DIMM is broken.
 The DIMM does not meet
the required specifications.
 Turn off the machine and remove the
DIMM.
 Confirm the DIMM meets the required
specifications. (See Memory board in
Appendix B of the Advanced User's
Guide.)
 Re-install the DIMM correctly. Wait a few
seconds, and then turn it on again.
 If this error message appears again,
replace the DIMM with a new one. (See
Installing extra memory in Appendix B of
the Advanced User's Guide.)
Disconnected
The other person or other
person’s fax machine stopped
the call. Try to send or receive again.
Error Message Cause Action