You most likely have the AF assist on still which is the problem for the camera’s internal flash.
If you want to use TTL, keep the camera in TTL mode and then put the INON to STTL, right dial to 12 o’clock and the button on the bottom right should be OUT.
If you want to use manual, go to flash settings onthe camera, turn to Manual mode, turn to 1/128th output, put INON into M mode, use right dial to modifiy output, bottom right button should be IN (or the magnet should be IN for the Z220).
The AF assist will only activate in low light and let’s out a series of short flashes to aid autofocus. This needs to be turned off.