While you wait for answers, we may have found some information which could help you.
Click here for Model Dear Sirerror c-6 400 in kyocera KM-1500?
How can I fix my photocopier Kyocera FS 1018 MFP?
What does error code C-6 400 on Kyocera KM 1620 mean? How can it be fixed ?
kyocera model 1620 error c-06?
Maintance kit light?
What does error code C-6 400 on Kyocera KM 1620 mean? How can it be fixed ?