this is my new smart switch. These three gangs are linked to live line. I transfer three switch line to each L1,L2 and L3 and live line to L.
There is a bunch of black wire which is combined of 5. and green and yellow.
I tried to put one of black wire to the N. the switch turned on with only one of black.
at the end, the light of switch was on and when I touch each buttons it turn to red, which is working right, but the actual right on the ceiling didn't on, it looks like not connected.
Did I do something wrong or it is the defective product? should I use all of black wire to N? but the hall was too small to put all of 5.