Hi all,

We have recently moved into a house with an Ademco Vista 20 alarm panel.

One of the children unplugged the power supply and the battery has completely drained.

When the power is switched back on, I get the code OC showing in the keypad display.

The unit was installed in 1998 so getting on a bit, and wondered if the old battery could be causing this problem?

Otherwise, any suggestions on how I can get this unit back up and running again?

Many thanks
Neil