Error Code 3 amber flashes in center of light bar

Printer cannot connect to a wireless network or has lost Wi-Fi connection.

? What Causes This

Network issue, incorrect password or configuration error.

Check the printer’s network settings and ensure it is connected to the correct network.
Verify that Wi-Fi is enabled on your device (computer/mobile) if you are attempting a direct connection.
Restart both devices and try again.

Source: page 96 of the official manual

From the manual

This error code appears in: