My printer is showing this error in the middle of taking print out sand it is solved by restarting the printer or turning it off, but now I am unable to resolve .
The cause of this issue is the compatibility error which says LSU Error Samsung Printer you should see the features of the Samsung printer or your operation has not, assigned most of the times the running printer without any assigned work can cause this error. If this error did not resolve on its own then contact your company operator for further assistance.
You normally get the LSU error code on SCX-4521F Samsung laser printer and this error code has many types. One example of LSU error code is “incompatibility issues error”. When you see this error, check that your printer is compatible with your computer. Try downloading the latest driver from the manufacturer’s website. For SCX-4521F Samsung laser printer, go to Samsung SCX-4521F Laser Multifunction Printer.
Download and install all available drivers and software for your printer. Before downloading, check that your correct operating system is selected. If you see a different operating system displayed on the page, click “Change” then select your correct operating system. See if this works. If this doesn’t work, check that the printer is connected properly to the computer via the USB cable.
If the printer is not detected, transfer the USB cable to another USB port then try again. Another LSU error code is “line error”. This LSU error code means the machine or the printer is unable to connect with the remote machine because of a problem in the telephone line. To fix the problem, turn off the printer for about an hour (1 hour).
After this, start the printer then turn on the ECM mode.
