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I have started a new post but in fact posted the same problem 4 years ago.
I am installing a new control panel on my alarm system. I want to stop the external bell sounding whilst I install the new panel.
This happened 4 years ago in Sept 2007, this time I am replacing the panel because the it has been physically damaged when moving furniture past it.
The wiring to/from the external box is still exactly the same.
I cannot understand why the solution given last time and which worked is not working this time.
The solution given by Breezer in 2007 was to connect the panel battery to the SAB supply + / -
I thanked Breezer at the time for the info, which enabled me to replace the panel.
This time the old panel is a Melcom ST5000 but is that relevant?
So I disconnected the wires to the SAB (on the panel) and connected the SAB wires to the battery, and the bell was still sounding.
I repeated this with the wires to the bell (on the panel) disconnected, still the bell sounded
To stop the bell sounding I found I needed to connect both the bell + and the SAB + again. If either is disconnected the bell sounds, but I found that the bell -, and the SAB -, dont need to be connected for the bell to sound.
I can turn off the power to the panel (which I obviously need to do to replace it), when SAB + / - is connected to the battery, and still the bell is sounding.
Perhaps I am missing something I did four years ago?
Any suggestions gratefully received
Thanks Jim
I am installing a new control panel on my alarm system. I want to stop the external bell sounding whilst I install the new panel.
This happened 4 years ago in Sept 2007, this time I am replacing the panel because the it has been physically damaged when moving furniture past it.
The wiring to/from the external box is still exactly the same.
I cannot understand why the solution given last time and which worked is not working this time.
The solution given by Breezer in 2007 was to connect the panel battery to the SAB supply + / -
I thanked Breezer at the time for the info, which enabled me to replace the panel.
This time the old panel is a Melcom ST5000 but is that relevant?
So I disconnected the wires to the SAB (on the panel) and connected the SAB wires to the battery, and the bell was still sounding.
I repeated this with the wires to the bell (on the panel) disconnected, still the bell sounded
To stop the bell sounding I found I needed to connect both the bell + and the SAB + again. If either is disconnected the bell sounds, but I found that the bell -, and the SAB -, dont need to be connected for the bell to sound.
I can turn off the power to the panel (which I obviously need to do to replace it), when SAB + / - is connected to the battery, and still the bell is sounding.
Perhaps I am missing something I did four years ago?
Any suggestions gratefully received
Thanks Jim