You could always do a Google search for, say, "kyocera km 1620 error c-06"
It took all of 60 seconds to find these:
http://www.fixya.com/support/t381897-copystar_kyocera_1620_error_code_c_6
http://www.howtomendit.com/answers.php?id=64675
There's more out there
XXX
January 2016