Over recent years our alarm has sounded whenever mains power is restored after a powercut. Although a bit of a pain in the night, this never caused a serious problem until the last time it happened, when the tamper light stayed on and the system would not reset. The battery fuse had blown on this occasion, and I've replaced this, and tested the 12V battery, which seems to be fine. Disconnecting and then reconnecting the mains and battery power sets the alarm off, as per the powercut, but then no change to the tamper status/keypad lockout. The PCB looks fine and none of the wiring through the house has been disturbed recently. Bridging the tamper loop (terminals 15 &16) makes no difference to any of this.

I'm grateful for any helpful advice how to restore normal alarm function.

i would advise you call a professional approved company to inspect your system.

Where abouts in the north west are you simon?

I'm in stoke if that's any help, 07917 017160

Over recent years our alarm has sounded whenever mains power is restored after a powercut. Although a bit of a pain in the night, this never caused a serious problem until the last time it happened, when the tamper light stayed on and the system would not reset. The battery fuse had blown on this occasion, and I've replaced this, and tested the 12V battery, which seems to be fine. Disconnecting and then reconnecting the mains and battery power sets the alarm off, as per the powercut, but then no change to the tamper status/keypad lockout. The PCB looks fine and none of the wiring through the house has been disturbed recently. Bridging the tamper loop (terminals 15 &16) makes no difference to any of this.

I'm grateful for any helpful advice how to restore normal alarm function.

If you search around you'll find many comments about this brand of panel having faults after power problems, flat batteries etc. Any damage may not be as obvious as a "burnt out" component on the PCB.

It will probably be more cost-effective to replace it professionally, or DIY if you have the time and skills.

Thank you for all your advice. I fact when I removed the bird's nest from the top of the external sounder box (some material had fallen inside and was presumably causing a short-circuit) the keypad would reset fine !

Simon

If it go's off when the power has been off its not a birds nest mate.

A problem with the bell box would blow the AUX fuse not the battery fuse.