Nissin i400 TTL Flash for Cameras - Manual (Page 6)

i400 is automatically turned off when repeating hi power full flash continuously over
20 to 30 times to protect the flash circuitry from overheating. It will automatically
recover after 15 minutes of inactivity. The pilot button will blink in the red color
every 1.5 seconds.
i400 has an energy saving power off function
Protect overheating function
To save battery energy, i400 automatically switches to stand-by mode, in A mode,
TTL mode & Manual Power mode, in about 2 minutes of idle use.
While i400 is in the stand-by mode a Pilot button blinks every 2 seconds showing the
flash unit is in stand-by mode. To turn on i400 again, press the camera’s shutter
button halfway or press any button of the flash unit.
In case i400 is not in use for over 60 minutes, the unit is completely turned off.
To turn on i400 again, take the first step of turning the flash unit on.
Basic Operation
5