Brother MFC-J491DW Online User's Manual page 447

Error Message
Cannot Detect Ink
Comm. Error
Connection Error
Connection Failed
Cover is Open.
Data Remaining
Disconnected
Document Jam
Cause
If you are not using Genuine Brother ink,
the machine may not detect the ink
cartridge.
The ink cartridge must be replaced.
The new ink cartridge has an air bubble.
The wrong Brother model ink cartridge
was installed.
If you are not using Genuine Brother ink,
the machine may not detect the ink
volume.
Poor telephone line quality caused a
communication error.
Other devices are trying to connect to the
Wi-Fi Direct network at the same time.
The Brother machine and your mobile
device cannot communicate during the
Wi-Fi Direct network configuration.
The scanner cover is not locked in the
closed position.
The ink cartridge cover is not locked in the
closed position.
Print data is left in the machine's memory. Press Stop/Exit. The machine will cancel
The other person or other person's fax
machine stopped the call.
The document was not inserted or fed
correctly, or the document scanned from
the ADF was too long.
Action
Use a new Genuine Brother Ink Cartridge.
If the error is not cleared, call Brother
Customer Service.
Replace the ink cartridge with a new
Genuine Brother Ink Cartridge.
Slowly turn the ink cartridge so that the
ink supply port is pointing downward, and
then reinstall the cartridge.
Check the model numbers of the ink
cartridges and install the correct ink
cartridges.
Use a new Genuine Brother Ink Cartridge.
If the error is not cleared, call Brother
Customer Service.
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
telephone line.
Make sure there are no other devices
trying to connect to the Wi-Fi Direct
network, and then try to configure the Wi-
Fi Direct settings again.
• Move the mobile device closer to your
Brother machine.
• Move your Brother machine and the
mobile device to an obstruction-free
area.
• If you are using the PIN Method of
WPS, make sure you have entered the
correct PIN.
Lift the scanner cover and then close it
again.
Make sure the USB or network cable (if
used) have been guided correctly through
the cable channel and out the back of the
machine.
Firmly close the ink cartridge cover until it
locks into place.
the job and clear it from the memory. Try
to print again.
Try to send or receive again.
If calls are stopped repeatedly and you
are using a VoIP (Voice over IP) system,
try changing the Compatibility to Basic (for
VoIP).
See Related Information: Telephone Line
Interference/VoIP.
Remove the jammed document, and then
press Stop/Exit. Set the document in the
ADF correctly.
See Related Information: Load
Documents in the Automatic Document
Feeder (ADF).
440