Hi Thanks
I'll checking wiring tomorrow...I was careful connecting everything so was pretty sure wiring was good ....but I'll double check tomorrow and I'm reading the bell install instructions again......always a good idea as I've made some sort of mistake.
Now I read it again I see another way to make final connections.
I was using Optional "Battery First" Connection Method making all connections and jumpers in bell units first and closing lid then making connections inside panel. As it was so sunny I did not notice right led flashing quickly which would have indicated tamper was ok for that bell unit. I'll try this tomorrow after wiring check.
The other method cited, connecting bells first, leave lid off, connect to control unit for power, 5 second alarm then they automatically enter "hold off" and left led flashes as lid is off, and now I can make bell battery jumper and then SCB jumper.....well I can try this too!
Finally - I'm unclear as to ref to "losing hold off voltage" or "mixed up 0V hold off with 0V trigger"
At the moment what you mean escapes me.
Wiring is as per above (if no mistakes on my part) and connected accordingly to control panel. I am only aware of invoking hold off my triggering strobe 3x within 30 seconds via Eng Utils which I did so I could open bell 1 and totally disconnect wires from bell and control unit before I started to connect from scratch the bell 1 and 2 combo as above circuit.
Thanks again.
Kind Regards
Missing circuit!