can not set alarm, saying lid tamper, when alarm goes of we just use our code and it goes off the model is 9930, no engineers code for it to reset it

mick, July 2012

That would be the control panel lid tamper,

Have you removed it recently or has it had a knock or been damaged in some way?,

Check the panel, make sure the lid is seating correctly, I think the tamper switch is at the top RH corner on that scantronic panel.If you need to remove the lid from the panel to access the tamper spring, please remove the mains power from the panel first for your own safety.

e manno, July 2012