Accenta 6?

hi, twice now after a thunderstorm my alarm as gone off
even when it was'nt set, the bell in the hallway went off, I tried to put in my code, and it seemed to stop, but I noticed it was on tamper, I have lost my instructions has I not used the alarm for a long while, now the alarm is going off in the night, but the bell is not ringing and it sounds like a whirling, has this been done by the thunderstorm, it has never happened like this before, please can you tell me how to download the instructions, my alarm is Accenta 6, Thankyou

poppy
September 2016