[Accidentally Shorted Sensor Power]

Thank you, Alarm Protection, it was exactly that.

 

In case it's useful to anyone in future, it seems the sensor power on this alarm is protected by fuse F2, "Speaker".

[Accidentally Shorted Sensor Power]

After removing an old PIR from an Accenta G4, I carelessly left the 13v and 0v wires touching each other for a day or so.

I only noticed when I later did a walk test, and all the zones with powered sensors (PIRs, Vipers) were showing as open.

I've now separated them, but I still don't seem to be getting the 13v supply to the powered sensors.

From the manual, it looks like there are fuses protecting the battery, speaker, siren/strobe and RKP supplies. There's no mention of the sensor suppky being fused, and the 4 fuses on the board look intact.

I've ordered some replacement fuses, more out of hope than really believing that will fix it.

Does anyone know what might be the problem or solution? Have I just fried that 13v supply?

Thanks