Lights came on early

[daveva]

I have my Christmas lights programed to turn on Dec 1st to Jan 2nd at 6:00 PM and tonight they turned on at 5:00. Any suggestions on why?   

[Dan Lawrence]

I presume you are using Active Home Pro and the CM15A. What version of AHP?

[daveva]

 3.228

[murphy]

It happens every year on the second Sunday in December if you are running the unit disconnected from the computer.  I have a note in my yearly calendar to be ready for it.  Reconnecting to the computer will fix it.

[daveva]

Thanks

[mitch5225]

I was just coming to look for an answer to the same issue! Thanks for the advice.

Does anyone know WHY this happens?
I sure as heck would never have figured it out on my own.

Regards,
Michelle

[twood]

It happens every year on the second Sunday in December if you are running the unit disconnected from the computer.  I have a note in my yearly calendar to be ready for it.  Reconnecting to the computer will fix it.

Thanks, Murphy--you got a Helpful from me!  Is the problem fixed by simply connecting to the computer, or downloading all timers and macros?

[Dan Lawrence]

If you don't have the CM15A connected to the PC 24/7, you get to play the reconnect game four times every year.  The old DST dates are hard coded in the CM15A and the new (current) DST dates are not, so four times a season you get to hook the CM15 to the PC on the new date, then unhook it until the old DST date, then reconnect it again.  You get to play that game twice a year.

Why a problem on the second Sunday in December?  No DST change then.

[murphy]

It happens every year on the second Sunday in December if you are running the unit disconnected from the computer.  I have a note in my yearly calendar to be ready for it.  Reconnecting to the computer will fix it.

Thanks, Murphy--you got a Helpful from me!  Is the problem fixed by simply connecting to the computer, or downloading all timers and macros?

You just have to connect to the computer so the CM15A gets it's date updated.  Downloading is not required.

[murphy]

If you don't have the CM15A connected to the PC 24/7, you get to play the reconnect game four times every year.  The old DST dates are hard coded in the CM15A and the new (current) DST dates are not, so four times a season you get to hook the CM15 to the PC on the new date, then unhook it until the old DST date, then reconnect it again.  You get to play that game twice a year.

Why a problem on the second Sunday in December?  No DST change then.

I have no idea.  I reported it over two years ago but my report was ignored.

[Dan Lawrence]

I would not be surprised to hear the folks who have odd shifts on the second Sunday in December have some strange holiday decoration not controlled by a module that is the cause.   Power line noise drives X10 crazy.