I installed a Texecom Veritas R8Plus about 3 years ago and haven't had any major problems. However, about a week ago when part setting at bedtime the control panel was making the noise that indicates an open circuit and so wouldn't set. I reset it and part setted again and this time it did set.

Last night the same problem occurred but this time the open circuit sound wouldn't go off so I left the alarm off last night.

After doing some checks this morning I have just found out that Zone 6 is open permanently so for the time being I've excluded this zone until I sort out the problem.

Zone 6 consists of two surface magnetic contacts attached to the front and back doors which are both still in place.

What would be the logical sequence to locate the fault please?

take 1 door contact off and short the wires, if this doesnt clear do the same on the other, then replace as required. if that dont clear , then there is a cable fault or the zone on the panel is faulty