I just attempted to replace an existing three way switch (two switches controlling the same light), with one of these
I hooked up the cables in the same way as on the old switch. The new switch seemed to use the terms 1WAY instead of L1 and 2WAY instead L2, but reading the installation instructions, I think these are equivalent.
The replacement switch worked, however the other switch which controls the same light (which I didn't change at all) no longer worked. I put the old switch back on and now everything works again…
What am I doing wrong with the new switch? Is the new switch switching differently?