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Vaillant VRC 470f keeps resetting it's self.

Discussion in 'Plumbing and Central Heating' started by eveares, 25 Apr 2016.

  1. eveares

    eveares

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    Got a small problem with my Vaillant VRC 470f wireless weather compensating heating controller that is used with my Eco Tec Plus 937 boiler.

    Every now and then (a few to several times a week), the clock on the controller randomly resets its self as if new batteries were put in. This has lead to the heating to come on in the early hours of the morning when the heating has been turned on during cold weather.

    I have already replaced the batteries, it is also in the same room as the boiler so the wireless range should not be an issue.

    Is there a option in the installer mode that would cause this sort of odd behavior?

    Any ideas?

    Regards: Elliott
     
  2. oldbuffer

    oldbuffer

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    I'm fairly sure the VRC470 is not where the date and time are stored, I think they are either in the boiler or in the VR65 (or similar) controller. Whenever we have a power cut, the VRC470 loses the date and time, and has to be reset. However, it doesn't lose any of the timer programme data.

    Whichever device stores the date and time has no battery back up, and I'm seriously considering installing a computer type Uninterrupted Power Supply on the boiler / controller circuit to stop this happening. Presumably in Germany they never have power cuts.
     
  3. AGAS

    AGAS

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    i feel tupperware coming on???:LOL:
     
  4. eveares

    eveares

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    Thanks a lot, I have just confirmed for myself that the time and date is stored in the boiler and not the VRC470f. As you said, the programs and the settings remain intact and only the time and date are affected when the mains power is lost.

    I have been doing electrical works recently and the power has recently been off for short periods, so I now know what has been causing this strange ball behavior. I will have to have a look through the manuals to see if the receiver in the boiler has an option for a battery back up. Surprised it does not have this feature as standard implemented through a battery backup capacitor.

    Is tupperware a user on here? Or have I missed the punch line.
     
  5. Aquaheat

    Aquaheat

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    No, Tupperware is a phrase used for what we RGI's create when there is no off the shelf solution to a problem or where we feel that we can create a better functioning system that hasn't been developed by a manufacturer such as your issue Elliot. We create electrical solutions to ensure a better operating system. The term Tupperware comes from the fact that it is usually fitted in a plant room or similar and fitted in the electrical boxes that resemble a lunch box such as these...

    [​IMG]

    Jon
     
  6. eveares

    eveares

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    Have to say, never heard the term tupperware used in that context before.
     
  7. Aquaheat

    Aquaheat

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    Its an in house thing for a few people some agree with it some don't but it will always happen. I'm sure you as a sparks have your own in house terms?

    Jon
     
  8. David937

    David937

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    How old is it? A long time ago I had a problem with my VRC430f which was using lots of batteries and Vaillant replaced it for free as it was under a year old. Worth a try.
     
  9. eveares

    eveares

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    About 3 years old.
     
  10. Bunnyman

    Bunnyman

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    You are mistaken, the date and time on the 470 is stored on the unit. There is a small battery inside the unit, if this fails it loses date and time, unfortunately its becomming more commin as the units age
     
  11. honkytonkpiano

    honkytonkpiano

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    I asked Vaillant and was given the following reply:
    "There is back up built into the control to save the settings in the event of power loss and this should save the settings for around 8 hours. It is not however a replaceable battery."
    I wonder whether Bunnyman can tell us how the internal battery could be replaced?
     
  12. eveares

    eveares

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    Correct!, it turned out to happen when ever the boiler it's self lost power. Did some testing ages ago and forgot to post back here.
     
  13. Bunnyman

    Bunnyman

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    Ffs no one listens
     
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  14. eveares

    eveares

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  15. HenryC

    HenryC

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    I would be interested to find out the final conclusion on this. I have a similar problem with a Vaillant VRT350f wireless programmable thermostat, which sometimes reverts to the factory time/date setting. I am not sure if it only happens when the power to my boiler (Ecotec plus 831 combi) is cut, but that's what happened today when the boiler was serviced (which involved switching it off). I suppose somebody in Vaillant may know exactly where the date/time values are stored and, if in the remote programmer, why loss of power at the boiler causes the information to be lost. However, based on past experience, it may be difficult to get a proper answer out of them.
     
    Last edited: 17 Aug 2017
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