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An update if another layperson gets wireless mismatch error message. The control unit has a learnt device but doesn't know what it is. So I had to go into wireless device control and the sub menu Change inputs to assign the already learnt devices with a code for final exit/ intruder etc. Back to...

It is a wireless system with the panel and alarm running off batteries

We had a problem with the Alarm going off reporting input 3 tamper on input. If we reset the alarm kept going we had to call an emergency alarm specialist out. He said the fault was the batteries in the siren when they became flat. He and disconnected the battery in the siren and the battery in...