!
error Tenda

Error Code red LED flashes 9 times

Failure to detect or connect with a specific wireless network when setting up guest WiFi.

? What Causes This

Incorrect SSID/password input/entry during setup; configuration inconsistencies with network access.

How to Fix It

Review entered details for accuracy, ensure correct selection of desired network before retrying procedure.

Source: page 27 of the official manual

From the manual

Manual page 27 — Tenda error red LED flashes 9 times

This error code appears in:

Tenda Ac1200 Wifi 6 Router