Thanks for the reply. It did not work for me. The zipper is not magnetized, but I noticed that the green LED (maximum opening magnetic sensor) is always halfway on, and it comes on completely when the magnet is brought closer. I pulled the sensor away from the zipper, but nothing. I get the impression that the circuit is taking that weak signal as a permanent presence of the magnet.
Did it ever happen to you? Is it a matter of changing the sensor or the board? Is there an easy way to exchange sensors to test? Both connect their wires to the connector that plugs into the board.
Thank you
From what you mentioned it seems that it was a sensor problem. To check it you must invert the sensor, unplug it, turn it on and plug it in, you can also bypass it if you look at the control panel, 4 gray wires arrive from the sensor to the 3-pin FCA connector, one goes to the lock (F), 2 goes to the common (C) and the other goes to the opening (A), you can unplug the connector and directly bridge F with C to simulate the closure, and C with A to simulate the opening,
same check the back of the board in case there is something bridging the connector pins or the integrated pins