Countinuosly i am getting E5 error on my canon

E5 is the ink cartridges are not installed or non supported ink.This mean if you have both cartridges in printer one or both are failed.You can't scan, because scanner and printer are connected together and you can use the scanner only if printer is initialized.In your case this is not so.Check print cartridges and replace first color, if not help replace and black.