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having problems with this machine, when 1st called intermittent faults found ie No drain pump / motor moves but is unable to turn drum. /but sometimes works OK.
fitted refurb module DMPU 9 RS. ran test selected wash prog starts to fill with water but drain pumps is also running, tested pressure switch OK.
can anyone please help..
cheers JohnRe: servis M3009A auto
If you’re certain the pressure switch is OK, I’d be tempted to suspect a faulty recon module 😉
Dave.
Re: servis M3009A auto
Dave. taken all cables off pressure switch, pump still runs, I also feel module may be faulty, will try another module first.
cheers john.Re: servis M3009A auto
Not sure if this applies here but a couple of times I had Servis machines doing strange things because one inlet valve had gone SHORT circuit ❗
As it was inline with the pump (as a flood prevention mechanism) this led to constant pump out at any fill position.If both valves were energised this could lead to simultaneous fill + pump out.
Mike.Re: servis M3009A auto
This is quite common. Often due to slight differences in the thickness of the PCB. ALWAYS ALWAYS ALWAYS tighten every pin in each of the 3 edge connectors when changing these modules otherwise these strange faults crop up. I know it sounds illogical that if a pin does NOT make, that the pump should run BUT these modules use a 28 pin microcontroller and 1 pin down often switches unwanted items ON ! Customers often say ‘the edge connectors felt tight’ – well that’s just not good ebough. Tony EMW
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