Canon imageFORMULA DR-C225W II Wi-Fi Connection Manual page 36

Q3 The scanner automatically turns itself off, making the Wi-Fi
connection unavailable.
A3 When the scanner has its Auto Power Off function enabled, it
automatically turns itself off after a certain period of inactivity,
regardless of the Wi-Fi connection. Turn the scanner back on,
and as necessary, disable the Auto Power Off function as
described in the scanner's manual.
Q4 I want to reset to the factory default settings.
A4 Press and hold the WPS button while turning the scanner on to
start initialization. During initialization, the CONNECTION lamp
lights red. When the AP lamp turns on, initialization is finished.
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