Kyocera printer error codes

Every code below opens a full page: what Kyocera documents the code to mean, what to check before acting on it, what to do if it returns, and a link to the Kyocera document it was verified against.

9 of 10 catalogued Kyocera codes published. The rest stay unpublished until their documentation has been read.

• 1102"Login Username and/or Password is incorrect" for the scan-to-email/SMB destination credentials — a specific scan-job authentication failure, not a general network connection failure.
• Cannot connect.The Wi-Fi or Wi-Fi Direct connection did not complete. Kyocera's documented action is to check the settings and the signal conditions. This is a wireless-association failure at the machine, distinct from the authentication-server messages that appear when the network is fine but a credential or the machine's clock is wrong.
• Cannot connect to Authentication ServerThe machine reached the point of authenticating and failed. Kyocera documents four distinct variants with different checks: verify the connection status with the server, check the domain name, check the host name, and set the machine's time to match the server's time. The clock variant is the one that surprises people — an authentication server will reject a machine whose time has drifted, even though every name and password is correct.
• Low temperature. Adjust room temp.The room is too cold for the machine to operate within specification. Kyocera's documented action is to adjust the temperature and the humidity of the room. Worth knowing before a cold-garage or unheated-office machine is diagnosed as faulty.
• Machine failure. Call service.An error has occurred in the machine. Kyocera's documented instruction is to make a note of the error code shown on the message display and contact your service representative. This is the guide's answer for numeric machine faults generally: Kyocera does not publish the meanings of individual C-codes to users, so the code is information for the technician rather than something to act on yourself.
• Paper jammed above Cassette 1.A paper jam has occurred. Kyocera documents that the machine stops and indicates the location of the jam on the screen, and instructs you to leave the machine switched on, select Help on the screen, and follow the on-screen instructions to remove the paper. Leaving it powered on is the part people get wrong — the guided sequence depends on the machine knowing where the sheet stopped.
• Replace MK.The maintenance kit is due. Kyocera documents replacement of the maintenance kit parts as necessary every 100,000 pages of printing, and states that it requires professional servicing — the guide's instruction is to contact your service representative rather than to fit it yourself. Like other page-counter messages this is a scheduled interval, not a detected failure.
• Replace the toner.The toner container is empty and must be replaced. Kyocera documents an earlier, separate message — "Toner is low. (Replace when empty.)" — which is a warning that the container is nearing its end, not an instruction to change it yet. Waiting for the replace message avoids discarding usable toner.
• Toner is low. (Replace when empty.)The toner container is nearing the end of its life. Kyocera's own wording contains the instruction: replace when empty, not now. The machine continues printing normally until the separate "Replace the toner." message appears.