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Ness D8/D16 not working on battery
I’ve just replaced the battery in my Ness D8 panel, however now when the AC is removed the panel dies completely.
I’ve checked that the battery is ok, and I’m seeing 12.7v on the plug from the battery to the panel and it appears to be plugged in ok - I’m wondering if there is a fuse anywhere for the 12v side at all?
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Is there 12v power at the outputs for devices and the keypad still works when on ac power?
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The keypad and everything works fine on AC power, however when I remove the AC the whole panel, the keypad and the sensors are all dead - yet the battery is fine.
Matt
Probably a stuff board. I've come across this before.
Was the previous battery been in it for a long time.
Sometimes the panel is trying to charge a old stuff battery and kills the panel. Burns out the battery charging circuit.
You'll see there are 2 small globes next to where the battery lead plugs onto the board. These are in series with the battery, and normally regulate the charging current into the battery. Test these with a multimeter - you should find they are both open-circuit, which is causing your problem. As Secure said, sometimes if the battery is left unchanged for too long after a Low Battery signal comes up on the keypad, it could stuff the board.
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Ah ok, I did see them both light up the other day when I was reconnecting everything on the panel. It was about that time that the 'LOW BATTERY' warning appeared on the screen and the battery stopped powering the panel.
The panel had been removed from the cabinet for about a month, then reinstalled and a new battery put on - that is when it stopped working on 12 volts. I'll throw a multimeter across those lights when I get a chance.
Is there anything I can do to get this panel back up and running or is a replacement job ?
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I finally got around to checking those LED's, they don't appear to be open circuit - but still seeing the 'LOW BATTERY' warning on the screen and the new backup battery is doing nothing when the power is pulled from the panel.
Maybe the panel is cooked ? Everything else works fine, just annoying to have the warning constantly on the screen - is there a way to turn this off at all ?
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I'd also put a voltmeter across the battery leads to see if any voltage is coming out. Should be 12.75 or more volts.
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Yes there is 12.7v at the battery, and getting to the battery input on the alarm.
Check the leads without the battery connected - sounds like the charging circuit is cactus.
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