Installed a KPL in a bathroom to control all the lights in the room: Over the sink, toilet, shower, walk-in closet, etc. The A button is the local load for the sink lights. Button H is All Off for bathroom.
The All Off (H) works great if A is already off.
If the A button is ON, however, pressing H only turns off the backlight on A. All the devices remain on.
I forgot how I made this work before. It was some trick about adding the local device last... or having to add the local device from they keypad not ISY... or a combination of the above... Anyone?