Re: Unusual behaviour DSC-864ULC

[mleuck <m.leuck@xxxxxxxxx>]

On Jun 6, 12:25=A0am, Frank Kurz <t...@xxxxxxxxxxxxx> wrote:
> OK... This is the second call I've attended on this control. =A0It's less
> than a year old. =A0The last time this happened was two months ago and th=
e
> problem had cleared by the time I'd arrived on site. =A0This time around
> however, the AC light was "off" and the system looked to be running on
> battery.
>
> Here's the troubling part. =A0Voltage at the AC terminals was 16.9VAC.
> Charging voltage was 13.2VDC. =A0Yet the panel was displaying an AC fault=
.
> =A0 There is no visible problem with the board. =A0I've downloaded the
> software and checked all the relevant locations. =A0Panel's programmed fo=
r
> 60Hz, etc. =A0This looked to me to be a board level problem. =A0I
> disconnected the battery (didn't touch the AC) and the system "died". =A0=
I
> reconnected the battery and nothing happened. =A0I then disconnected the
> AC and reconnected it. =A0Panel comes back on line (displaying the normal
> clock failure trouble). =A0Reset the clock and the panel clears and
> operates normally.
>
> Since this is the second time the same trouble has appeared, I figured I
> should replace the common control (to be on the safe side). =A0I swapped
> the sucker out and downloaded the information from the old system to the
> new one. =A0Everything works. =A0All zones annunciate. =A0I'm gonna take =
the
> old MB and set it up at the office. =A0Anyone encountered this problem
> before? =A0I'm thinking this could be a "hold-over" from that batch of ba=
d
> rectifiers but the strange thing is the panel is only seven months old
> and the power section of the board looks to be completely normal.
>
> Oh... =A0One more thing. =A0The station received an AC Failure signal wit=
h
> the restore when I reconnected power.
>
> Weird.
>
> --
> Frank Kurzwww.firetechs.net

It takes you months to figure out you should replace the board?