Zanussi DA6141 not filling; odd issue

[rhino666]

Hi

My Zanussi DA6141 has worked without issue for over 20 years so not a total surprise when there was a problem.
Machine sounded normal but no water getting in.
I poured some in to prove that the motor and everything else was fine and then took a look at the Inlet Valve, part number 15202330/4.
Showed a ‘1’ with a multimeter continuity test, so I thought I had it worked out. Unfortunately the new replacement I bought also showed a ‘1’ but when multimeter setting changed to 20 ohm started to show a reading.
I tested both valves and they both worked but when connected to the dishwasher, there is a live feed to both spades on the valve, so no wonder it is not opening.
Can anyone suggest why both pink and blue wire feeds are live?

Thanks

Rob

[electrofix]

first thing to check is the wiring back to the timer

Dave

[rhino666]

Hi Dave

Thanks for the reply. Dishwasher is in bits on its side on the floor. Several wires on the timer connected to the blue(neutral?) but nothing to the pink and no pink wire on the timer. I followed the wiring from the inlet valve to a connector and found the pink. It goes to a vacuum/pressure switch?
Please see https://i.postimg.cc/4yvxv2Mq/IMG-0496.jpg
Switch has a pipe that joins a plastic tank, please see https://i.postimg.cc/d3c0ycWG/IMG-0495.jpg
As can be seen, there appears to be trapped dirty water which does not look right.
Just trying to get at that Switch to see how it works but struggling to work out how to get it off without breaking the rubber mount.
Update, switch out and appears to be a pressure switch that reverses contact from centre when blown into.
Now have water pumping whilst machine on side with pressure switch tube connected.
It would appear that the trapped water in my second picture may be the issue.
Any advice on this much appreciated.
[IMG2=JSON]{“data-align”:”none”,”data-size”:”full”,”title”:”Vacuum Switch?”,”src”:”https://postimg.cc/H8xmdzT9%5D%5Bimg%5Dhttps://i.postimg.cc/H8xmdzT9/IMG-0496.jpg%5B/img”}[/IMG2]

[electrofix]

its not trapped water its the water softner and that look normal

let me have the pnc number as there are 5 machines dated between 2004 and 2010 with the same model but may well have different wiring and components. Then i can look it up to see what i can find

Dave

[rhino666]

Hi Dave

That’s a relief, re water softener as been sat on its head for several hours and none drained out.
Zanussi DA6141 purchased 26/10/2001 with a date stamp of 09/2001 found on plastic chassis.
Sorry, no PNC or equivalent found on machine or original instruction booklet, unless 152977 37/0 means anything?

Cheers

Rob

[electrofix]

no does not mean a thing

there are 2 macines produced 2001
selecting one i see the inlet valve has 2 wires
pink and voilet

the pink wire feed live from the pressure sw
the violet goes abck to the timer to provide the neutral

Dave

[rhino666]

Hi Dave

That sounds exactly correct, violet being my colour blind version of blue:-)
A rather bizarre problem that hopefully for no particular reason may have been resolved.
I can only guess that there was a problem with the pressure sensor but the fact that both wires showed voltage is confusing.
Will try and put it back together tomorrow and fingers crossed the issue resolved for a while.

Do you have any theory as to what caused this?

Thanks

Rob

[electrofix]

unless you disconnect the wires from the valve the live voltage will bleed through the coil and give you a live on both sides. This is only because the current draw is so low that it will not activate the valve

Dave

[rhino666]

Thanks for the continued advice Dave.
All back together now and working fine.
The machine may be almost 20 years old but very clean where it matters, that messy side tank aside and a quality item.
Can only guess that the pressure switch was jammed temporarily.

[Author]

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