AndyRylance1

Hi Guys, so the house I moved into 6 months ago has an old alarm fitted, I’ve never bothered arming it because I didn’t know the code. Anyway yesterday I isolated the upstairs lighting circuit to fix a fitting, I’ve done this before a few times but yesterday I went out without turning the circuit back on. Bizarrely when I flipped the switch back last night the alarm went, it seems to be connected to the upstairs lighting circuit! It’s an Optima XM, apparently. I've managed to get the thing into test mode and cleared all the zones but the second I turn the power off and on again the alarm sounds. The weird thing is that the attack and tamper lights are not on, only the power light so I don't know was triggering the alarm. I downloaded the manual and it does not mention anything about this. I have checked all fuses, they seem fine but the battery appears to be dead. any help would be greatly appreciated.