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Hi all
Does any one have a service manual that they could send me please.
I have a machine that is refusing to fill with 3 different readings on the different valves so before I condemn the board (my prime suspect in this case) I would like to check against the figures in the manual and get any info on test sequences etc, especially as I don’t normally see such new and flash Bosch’s as this.
Thank you
Jem
hollytree(dot)technical(at)googlemail(dot)com
Re: Bosch SMS69L12GB/18 – Service Manual
There’s only 2 valves, an external aquastop valve and a salt valve. Filling problems mostly associated with the flow sensor thats fitted on the inlet matrix.
Re: Bosch SMS69L12GB/18 – Service Manual
I had sort of discounted the flow meter because it doesn’t appear to let the water get as far as turning the wheel yet the aquastop valve meters at 4.4K all the way back to the board (tad higher than I would have normally expected – is this right?), the valve on the side of the salt container meters at 2.2K (lower than I would have expected) and there is a valve slightly nearer to the front of the machine on the bottom of the fill matrix which meters at 1.9K (a lot lower than I would normally expected but on the 2 times out of many that it did allow water that far it worked perfectly).
Is it worth getting a new flow sensor to try any way? Would this stop the board outputting power to the valves?
Thank you
Jem
Re: Bosch SMS69L12GB/18 – Service Manual
Hollytree_Technical wrote:and there is a valve slightly nearer to the front of the machine on the bottom of the fill matrix which meters at 1.9K
Ah yes I forgot that valve. That’s the Heat Exchanger Drain Valve with a restance value of 2.2k?. The aquastop is rated at 4.2k? and the Salt Valve at 2k?.
One question: Does the tap LED light up (E14 error) when the fault occurs?
Re: Bosch SMS69L12GB/18 – Service Manual
It shows E24 on the top display and the check water light comes on.
Thank you for all the help so far, It sounds like the valves are OK then.
Jem
Re: Bosch SMS69L12GB/18 – Service Manual
Hollytree_Technical wrote:It shows E24 on the top display and the check water light comes on.
No need to faff around with valve resistance then as your problem associated with drain pump issues. Usually its just a blockage but if the impellor is restricted in some way its resistance reading goes AWOL and the module goes into error mode. Wont fill, wont play at all. 😉
Re: Bosch SMS69L12GB/18 – Service Manual
Can you tell me what resistance readings I should get on this pump? because it sounded all right and emptied happily when it did successfully fill.
Thank you
Jem
Re: Bosch SMS69L12GB/18 – Service Manual
Ta Muchly
2 more quick questions before I go and look at it again:
Does it have a speed sensor on the drain pump?
Where and what is the level sense other than the flow meter as I couldn’t see anything but may have mistaken it for something else?Thank you
Jem
Re: Bosch SMS69L12GB/18 – Service Manual
Hollytree_Technical wrote:Does it have a speed sensor on the drain pump?
Well kind of in that the module measures the resistance of the drain pump to detect any potential blockage. If the resistance increases then the module turns the pump on and off in an attempt to clear the blockage. If that system times-out then the module displays an E24 error on some models (tap symbol illuminates on other models)
Hollytree_Technical wrote:Where and what is the level sense other than the flow meter?
Just the flow meter thats all and any overfill then left to the anti-flood in the base.
Re: Bosch SMS69L12GB/18 – Service Manual
I have checked for any blockages and checked that the machine will drain – it gets to about 3 or 4mm of water in the sump which seems pretty good to me, the machine starts of by pumping out for a bit then stops for about 15 seconds then pumps again before running the main motor and then the pump again, pause for about 15 seconds and then end.
Pump is giving me a reading of 89.3 Ohms – is that far enough out of spec to cause problems or is it more likely to be the board? It felt ok to turn and I couldn’t find any blockages, I didn’t have one so wasn’t able to just try swapping it.
I may well get a pump in anyway to try but wonder if I need to quote board as well.
Thank you
Jem
Re: Bosch SMS69L12GB/18 – Service Manual
Realistically speaking the drain pump a cheaper option than the board so I’d go and try a new pump (common problem). It’s worth bearing in mind that if it were to be a board fault then likely as not the pump would’nt work anyway. 😉
Re: Bosch SMS69L12GB/18 – Service Manual
I would like info on these if anyone wants to send it me for a christmas present! Not fixed one but sold a couple. 😀
Re: Bosch SMS69L12GB/18 – Service Manual
Well I tried a new pump yesterday but there was no change, I even stripped the whole sump and pipework down to check that there wasn’t a blockage that I had missed but couldn’t find anything so had to diagnose it as board fault – customer has decided to scrap it as a board was too expensive for their liking.
Jem
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