Fuji Xerox DocuPrint M375 z Reference Manual page 6

When the Wi-Fi light is on, your Fuji Xerox machine is connected to a wireless access point.
When the Wi-Fi light blinks, the wireless connection is down, or your machine is in the
process of connecting to a wireless access point.
(For Ad-Hoc mode)
The Wi-Fi LED is always off.
5