E-5 is a network report code documented for Epson ET-3850. Wireless security settings are incompatible.
What this network report code means
Wireless security settings are incompatible.
Applies to: Epson ET-3850. Do not reuse the same code on an unrelated model.
What to try, in order
- Select a secure authentication mode supported by both devices.
After each step, repeat the action that produced the message. If it clears, you can stop.
Read the network report in context
On the ET-3850, open Settings → General Settings → Network Settings → Connection Check, then print the check report. Match the complete E-number on that report, not a similar front-panel code. Keep the printed SSID, IP address and device identifiers private. After changing the indicated setting, run the report again and then test from the computer.
When to stop
Stop if the instructed check does not apply, access requires disassembly, or the error persists after the documented steps.
- This E-number comes from the ET-3850 network connection report. Do not interpret it as a front-panel service code or reuse another model's code meaning.
Do not buy a part from the code alone. Check the exact model and manufacturer's part list if a replacement is actually required.
Models covered by this source
Official sources
These links identify the source and its scope. Check the manufacturer page again before changing a printer setting or buying a part.
- Epson — Network connection report codes linked from ET3850 support Checked 2026-11-01; official full page
Useful next steps
Found a mismatch? Request a correction with the public source URL and exact model, without passwords or full serial numbers.