Konica Minolta IEEE 802.1X Error 15
The printer waited for the authentication server but did not receive a response in time.
Error meaning
The authentication server response timed out.
This meaning is tied to the reviewed family/platform and subsystem below; do not reuse the number or wording by itself on a different printer family or protocol.
Applies to
bizhub C287/C227
- bizhub C287
- bizhub C227
Common formatting
These are formatting/lookup aliases for this reviewed condition, not separate error pages.
- 15
- ieee8021x-15
What usually causes it
- The RADIUS/authentication server is down, unreachable, or overloaded.
- A switch, access point, VLAN, routing rule, or firewall is blocking the authentication exchange.
- The server address or network path is correct in principle but latency or packet loss prevents a timely response.
What to try
Check whether other 802.1X devices are authenticating
If multiple devices fail at once, investigate the RADIUS service or network path before changing this printer.
Verify the authentication server and network path
Confirm the expected server is online and reachable from the network infrastructure serving the printer.
Review firewall, VLAN, and access-point logs
A timeout is different from bad credentials. Look for dropped or unanswered authentication traffic instead of repeatedly resetting passwords.
Retry after the path is healthy
Reconnect the printer after the RADIUS service and network path are confirmed available.
After each corrective action
Retry the same operation that produced 15. If it now works, stop there rather than changing unrelated printer, network, supply, or service settings.
If the code returns
If code 15 returns while other devices authenticate normally, capture the printer's network location and have the administrator trace the request through the AP/switch and RADIUS logs.
When service may be needed
This is a network reachability/response problem rather than a printer mechanism fault. Escalate to the network team if the authentication server does not answer the printer's requests.
Continue with guided troubleshooting
If the printer still is not working after the reviewed checks, carry this verified error context into the guided troubleshooter.
Related information
Verified source
Official Konica Minolta product-family user guide. Candidate meanings are paraphrased from protocol-specific code tables; manufacturer prose must not be copied into public pages.