L7248C 1006 Honeywell aquastat

Discussion in 'Boiler Forum' started by stillchillin, Feb 19, 2012.

  1. stillchillin

    stillchillin New Member

    Messages:
    2
    Location:
    Brunswick, VT
    Need help! I have a Buderus boiler with a honeywell electronic aquastat. I am off grid solar with a Honda 6.5KW back up generator. The boiler works fine while inverting off the batteries, but the control locks out on a Err4 when the generator is running. I see 125V at the control while on the generator. Everything is wired properly, grounded. I have tried a few thing with no change Switched L1, L2 and additional grounding. Thanks
  2. Tom Sawyer

    Tom Sawyer In the Trades

    Messages:
    3,166
    Location:
    Maine
    It's your generator. Generators do not always produce a clean wave and some of the new electronic controls don't like that. You can swap your boiler control out for a L8124 or L8148 which is analog and will work fine.
  3. stillchillin

    stillchillin New Member

    Messages:
    2
    Location:
    Brunswick, VT
    That was my thought also, Thanks do you know of a devise to clean up the sine wave? I kind of like the control and there are boards in every appliance in the house.

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