Alarmed!

Thanks for that - that works fine. The Engineer's guide ( 800-05263) which came with the panel says button "6" for the LED keypad, but doesn't say that it is different for the controls on the panel itself

I'm tring to programme the bell time on this panel in engineering mode. When I press "6", LED's 1,2 and 3 should show but I'm getting 1,3,5 and 7 and then it won't go any further. Does anyone know what this means and why it is happening?