13 troubleshooting and routine maintenance, Troubleshooting, Error messages – Brother MFC-640CW User Manual
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13 - 1 TROUBLESHOOTING AND ROUTINE MAINTENANCE
13
Troubleshooting
Error messages
As with any sophisticated office product, errors may occur. If this 
happens, your machine identifies the problem and displays an error 
message. The most common error messages are shown below.
You can correct most problems by yourself. If you need additional 
help, the Brother Solutions Center offers latest FAQs and 
troubleshooting tips.
Visit us at.
Troubleshooting and routine
maintenance
IMPORTANT
For technical help, you must call the country where you bought the 
machine. Calls must be made from within that country.
ERROR MESSAGES
ERROR 
MESSAGE
CAUSE
ACTION
Comm.Error
Poor phone line quality caused a 
communication error.
Try the call again. 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.
Cover is Open
The scanner cover is not closed 
completely.
Lift the scanner cover and then close it again.
Data 
Remaining
Print data remains in the 
machine’s memory.
Re-start printing from your computer.
Print data remains in the 
machine’s memory. The USB 
cable was unplugged while the 
computer was sending the data to 
the machine.
Press Stop/Exit. The machine will cancel the 
job and eject the page that is being printed.
Disconnected
The other person or other person’s 
fax machine stopped the call.
Try to send or receive again.