During setup the WLAN adapter can be set by accident in the WPS pairing mode. To abort the WPS pairing mode, hold the [SETUP] button for 3 seconds and the WPS pairing will be aborted.
Remark:
This functionality is not available on WLAN adapter FW version 2.0.2 or lower. In that case, wait for around 2-3 minutes till the WPS pairing time-out.