The novita toilet seat water pressure light flashes

I tried it myself or it didn't work, the water sprayed the nozzle and immediately retracted it and then the light continued to flash, the fire was big, I dismantled it myself (it's still very easy to dismantle, there is a button on the side to press and pull it forward to take it off completely) Turn off the valve power screwdriver to serve, clean the dirt and dirt place, I have no experience in electrical electronics or mechanical repair, all with a passion, and the experience of disassembling the game console video recorder as a child, all the plugs are plugged in and unplugged again, and it is quite face-saving after cleaning up and installing, I've heard that the water pressure control power plug of this thing will have contact problems, but I don't know which one it is, so it's carpet type, and I finally got it.

When flashing, press the flush, then immediately press the stop, the light will not flash, and then the next step, press and hold the stop for a few seconds to unlock, flush with the child function, if the flush is normal, stop, and then press the normal flush, it's OK.