Thank you for your answer.
However, the hardware of the ATU-100 is normal. Because it works fine with the original firmware (N7DDC version).
Hi. There are 2 test firmwares , you can use both of them to find burned transistors or bad soldering. "Fast test" just turn all the relays on and you can check everything with multimeter.
"Manual test" allows you to operate all the relays manually.?
