How to reset Kyocera 8020MFP to factory default settings?

Hi there,
I'm a new guy on your forum. I found you searching help on google about resetting kyocera 8020MFP.
I could not find anything about this so I thought maybe posting in this forum will help me.
So, I'm asking for your support. Is here anybody who can help me, please?!
Thank you very much in advance!

Best regards,

Vali