Beko machine with Invensys timer board

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  • #26076
    stylers
    Participant

    Howye all..

    This probably belongs in another (trade) section because its a bit technical but here goes anyway. Recently I replaced my ageing (but still working) philips series 90 machine for something with a higher spin speed, So I found a reasonably priced Beko machine, model WMA520. I went for it since it had an electronic timer and time delay feature which would come in useful, and I decided I wasnt going to buy some piece of crap hotpoint etc.

    Straight away compared to the old machine, it took in almost no water (useless IMHO), and takes ages to do a wash (annoying). The lack of water was easily cured by tweaking the pressure switch. While doing this I had a look at the electronics, and its all very straightforward (for me anyway). The timer board is manufactured by Invensys, who make appliance and industrial controls. There’s a powerful Atmel ATTiny32 microcontroller (processor) taking care of it all, and a few triacs driving the pump, cold fill valve, door lock and motor. then the necessary buttons, LED’s and switch mode power supply.

    this must be a universal board, since there is also a driver for a hot fill valve (that would be nice), and there is a connector for a serial port interface to the microcontroller (RS232 by the looks of it, GND, TX and RX lines) and an ICSP programming port for the microcontroller.

    My question is : What other machines use these Invensys boards ?, and is there any software programming or diagnostic tools available for them ?. There must be, because of the serial port.

    I ask because it would be nice to enable the hot fill valve, and reduce the wash time a bit (Since it now takes in a proper amount of water).

    I must add that with the extra water tweak, it washes VERY well !!. good spin too. And it seems well constructed, nothing much apart from the electronics to give trouble (The board uses lead free solder, which is prone to failure, so i resoldered some of the higher current joints with normal lead solder).

    Owen

    #208667
    Penguin45
    Participant

    Re: Beko machine with Invensys timer board

    I see. So, you want a machine that uses the same amount of water as your old one and uses huge amounts of energy to heat it?

    It’s all moved on, Stylers. Instead of sploshing your clothes about in three gallons of water, you now have probably less than a gallon of water, being forced through the clothes. It’s more energy efficient but slower. As for a hot valve, what’s the point? The machine will have finished filling before the water comes down the pipe. Invensis make control boards to manufacturers specification – as do AKO, Remco and a few others. They’re actually irrelevant.

    Consider, by the way, that were you to buy your Series 90 now, you’d pay about £600 and yet you have chosen to pay £200 for a cheap and cheerful Turkish import. I have to say, that you will always get what you are prepared to pay for.

    You’ve invalidated your guarantee, BTW, as well. When this one’s fallen to bits in three years time, come back to us and ask what’s a good one.

    Regards,
    Penguin45.

    #208668
    stylers
    Participant

    Re: Beko machine with Invensys timer board

    Well thats not exactly what I’m trying to do :-). I do realise that things have moved on a bit.. I’m well aware of the way machines work nowadays – badly IMHO. Yes I would have got a miele or bosch but would have had to go to a lot of hassle here in Ireland to get the right machine – they’re quite sparsely distributed. and i didnt consider the guarantee on a cheap machine important either – if it goes wrong or falls to bits i can sort it myself. I know invensys make a lot of control boards as do AKO etc.. all i really want to know is if there is any way of programming / setting them up.

    IMO a hot fill would be useful in my case – it can actually make a difference when its implemented correctly.

    cheap and cheerful Beko may be, but I have always considered their other electronic stuff quite good, i.e. well designed and reasonably reliable (I’m a TV repairman btw) so i thought i’d give it a try.

    Regards,

    stylers.

    #208669
    helo_75
    Participant

    Re: Beko machine with Invensys timer board

    to be fair, hot fills just arent practical and never where

    the scenrio?

    a 6o degree wash, taking the water from the tank/drawn from combi

    now, cos were soft here, we have both the heating and the water on full, well over the 60 degrees the machine needs

    so wot happens?

    does it take water thats far too hot, and will surely ruin your clothes?
    or does it take just cold and heat it to the right temp, taking away any possibilty of customer error?

    ive had people throw bags of ruined clothes at me, because, they, as consumers thinks it right to run hot water to their machine well over the wash temp

    things have changed…. if you were to put a hot fill on , say one of those QUALITY indesits (and ive seen this, btw) the thermistor would sense his within 4 seconds, lock the machine out and just wouldnt work!

    not all machines work badly , the basic principal is fantastic.. reduced energy, water consumption, cleaner clothes, quieter spins
    its the manufacturing process that lets them down, cheap nasty badly built components, built badly because the consumer wants CHEAP

    the technologies fine, just people wont pay for it, plain and simple

    things like miele prove the point – theyre the price they are because miele have set out there stall – well built machines at prices to match

    u’ll never convince the public that its their own fault theyre suffering!!

    finally… a quote… a well used one.. most of us will have heard it in the field

    ” i bought this machine for £150 CASH and its broke down , and its only 4 yrs old – i want my money back “

    say no more, this isnt a rant, just fact

    #208670
    kwatt
    Keymaster

    Actually, it costs more to heat the water, even using a combi-boiler than it does in electricity in the machine. But heh, what do I know.

    The other point I’d make is a simple physical fact, the cost in energy required to heat a volume of water to a desired temperature takes whatever energy required in Joules and that’ll be that. How you do it makes absolutely no difference whatsoever, the requirement is the same so long as the volume and start temperature are constant.

    You may think that you’re cheating the system, but you’re not.

    K.

    #208671
    Trilobite
    Participant

    Re: Beko machine with Invensys timer board

    helo_75 wrote:to be fair, hot fills just arent practical and never where

    the scenrio?

    a 6o degree wash, taking the water from the tank/drawn from combi

    now, cos were soft here, we have both the heating and the water on full, well over the 60 degrees the machine needs

    so wot happens?

    does it take water thats far too hot, and will surely ruin your clothes?
    or does it take just cold and heat it to the right temp, taking away any possibilty of customer error?

    ive had people throw bags of ruined clothes at me, because, they, as consumers thinks it right to run hot water to their machine well over the wash temp

    things have changed…. if you were to put a hot fill on , say one of those QUALITY indesits (and ive seen this, btw) the thermistor would sense his within 4 seconds, lock the machine out and just wouldnt work!

    not all machines work badly , the basic principal is fantastic.. reduced energy, water consumption, cleaner clothes, quieter spins
    its the manufacturing process that lets them down, cheap nasty badly built components, built badly because the consumer wants CHEAP

    the technologies fine, just people wont pay for it, plain and simple

    things like miele prove the point – theyre the price they are because miele have set out there stall – well built machines at prices to match

    u’ll never convince the public that its their own fault theyre suffering!!

    finally… a quote… a well used one.. most of us will have heard it in the field

    ” i bought this machine for £150 CASH and its broke down , and its only 4 yrs old – i want my money back “

    say no more, this isnt a rant, just fact

    I rather think that the correct scenario is the 95 degree Whites programme. This is where the hot-fill comes into it own, especially where the older machines consumed gallons more water. This gave a much needed boost in order to reduce wash times. (It should of course be noted that a bio-prewash would be required to remove blood and stains before boiling).

    #208672
    Penguin45
    Participant

    Re: Beko machine with Invensys timer board

    Given the advanced state of modern detergents, there is nothing that we own that needs to be boiled anymore. The only regular practical use of the 90/95c programme is to perform the monthly service wash to clean the machine itself. Cold fill is a small price to pay for that one high energy wash.

    Penguin45.

    #208673
    Trilobite
    Participant

    Re: Beko machine with Invensys timer board

    Penguin45 wrote:Given the advanced state of modern detergents, there is nothing that we own that needs to be boiled anymore. The only regular practical use of the 90/95c programme is to perform the monthly service wash to clean the machine itself. Cold fill is a small price to pay for that one high energy wash.

    Penguin45.

    Linen items, for example tablecloths, benefit from a boilwash.

    For sterility in nursing, temperatures of 85 degrees C. are displayed on garments.

    Asthmatics are told to opt for cotton sheets and bedding which can withstand high temperatures to kill dust-mites.

    Oxygen based bleaches work better at high temperatures.

    #208674
    helo_75
    Participant

    Re: Beko machine with Invensys timer board

    im not sure a hospital would buy an indesit or beko to wash their sheets, would you?

    different ball game

    take it as it is, people dont need hot fill any more, and thats fact, whether we like it or not its been taken out of our hands, we’ll just have to live with it

    #208675
    kwatt
    Keymaster

    Re: Beko machine with Invensys timer board

    It’s really only very heavily stained items I find that gain any benefit from a boil wash these days, but each to their own.

    In all honesty I’ve reckoned that hot fill has been a waste of space since the mid eighties as, simply, people are lazy and won’t make sure that there is hot water at the pipe, so it fills with cold. On an automatic, even from the eighties, the water use was about 150 litres per cycle with one wash fill and three rinses usually, today that is now pretty much halved. So, IMO, hot fill is a waste of time.

    It was great when we had the old toploaders and twin tubs which used half a reservoir per wash, but on an auto, na, no point.

    Sterile washing, buy a pukka machine for the job if that’s what you want and it has to meet the WRAS regs to do so these days in environments where sterility is a real concern. Fact is that many nursing homes, NHS etc. all cop out by getting staff to wash their own when in fact they should be done in a proper manner in a machine that is dedicated to the job. Saves money, that’s it.

    As for asthmatics, I don’t know as I’ve never studied the requirement or come across that one as yet.

    K.

    #208676
    don
    Moderator

    Re: Beko machine with Invensys timer board

    kwatt wrote:
    As for asthmatics, I don’t know as I’ve never studied the requirement or come across that one as yet.

    K.

    Found this on http://www.asthma.org.uk

    House-dust mites are microscopic spider-like creatures that thrive in bedding, carpets, curtains and even children’s soft toys. Asthma experts recommend that people whose asthma is triggered by house-dust mites wash bedding in temperatures of 60 degrees celsius each week in order to kill the tiny creatures.


    Don

    #208677
    kwatt
    Keymaster

    Re: Beko machine with Invensys timer board

    60oC, like Domestos kills 99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} of all bugs then. 😉

    Nice find Don, at least we now know the facts if anyone asks.

    I was always told that the boil wash was for bleaching or dyeing stuff, I have in the past few years, gotten the impression that it being required to clean to a standard is pretty much a myth. Of course I could be wrong, but there seems little evidence to support the assertion that it is required for cleanliness of laundry in a normal domestic situation.

    K.

    #208678
    dpm
    Participant

    Whilst actual figures differ for each variety of bug, we can generalise by saying that sterility is created by

    time x temperature

    You pass a critical temperature for a hold time and… job done. Cycle time is the variable, in my experience.

    Plenty ways to skin a cat tho:

    60c + modern detergents, probably ? 30 mins at temp, maybe a three hour cycle.

    121c/ 15psi in an autoclave? 15 mins at temp, again, 2-3 hrs cycle time (unless you’ve got some pretty fancy stuff going on heating and cooling- wise)

    180c in a hot-air sterilising oven for a 1hr holding time. Oven can be preheated, so maybe 1 1/2hr cycle…

    Or look at dairy, pasteurisation can be 71.7c for 15secs or 62.8c/ 30mins, sterilisation 104c/40min or 113c/15min, UHT 132.2c/ 1sec!…

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