AEG Lavamat (Zanussi) – E34 & E52 Errors

[petercherry]

AEG Lavamat 74640 Update

Hi folks, can you help shed a bit of light on a couple of errors please..?

Machine stopping mid-cycle on virtually anything I try. On Cotton wash, water is filling to correct level, drum is turning, water is getting hot, but stops 20 mins in with E52 error (motor/cabling issue I understand?). Brushes have been changed recently.

On a rinse and spin, it doesn’t even move the drum before coming back with an E34 error – pressure sensor problem (changed the small black one already, vacuum tubes OK, bottle not clogged).

I’m getting stumped ..? Any ideas anyone would be most appreciated 😕

Cheers, Peter

[Martin]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

First thing I would do is to check the insulation on the heater with a 500v insulation tester. 😉

[petercherry]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

Hmmm, thanks – I was wondering if that could be the culprit .. The water is getting quite hot, do these have a tendency to cause a problem as they get hot? I’ll have to try and borrow an insulation tester as I haven’t got one myself.

The only thing that put me off simply replacing it was the fact that when I tried a simple rinse & spin, the machine was stopping immediately – presumably before the coil would try to heat any water.

[Martin]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

petercherry wrote:presumably before the coil would try to heat any water.

Any insulation ‘leak’ would cause random errors and irratic stopping throughout any given programme cycle no matter what it was doing or where it failed. The electronics will throw a wobbly at any time……….. 😉

[petercherry]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

22 M Ohms (Not G) … perhaps not too good?? My new oven element is well into the G Ohms.

Any thoughts? Cheers, P

[petercherry]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

Sorry, just to add, this is disconnected & cold at 500V

[Martin]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

petercherry wrote:Sorry, just to add, this is disconnected & cold at 500V

What is, the oven element? I thought we were on about a w/m? 😕

[petercherry]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

No the element out of the w/m …!! I tested a spare oven element I had to see what ohm reading I got as a comparison. BTW, I’ve just knocked some more scale off the element and its now reading more like 41M Ohms, cold, taken out of the machine.

What reading would you expect?

Cheers, Martin – Peter

[petercherry]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

Any thoughts appreciated .. Peter 😉

[petercherry]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

Hi, I’ve taken the main circuit board out of the machine, one of the resisters was really black, there was soot on both sides of the card. I cleaned it up, re-soldered some joints but still the same problems – well, a consistent E52 error now.

My question is – will a new card fix this, or has something else caused the card to blow?

[Martin]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

petercherry wrote:My question is – will a new card fix this, or has something else caused the card to blow?

The ability for the PCB to detect faulty components it supplies and give an appropriate error code is fallible. It merely gives a rough guide as to what may be at fault. Often any earth leak can compromise its ability to give an accurate reading. Now with a heater showing a megger reading of 41mOhm ain’t that bad but could well be enough to cause the PCB to throw a wobbly. A reading in excess of 100mOhm would be the way forward and I wouldn’t mess around scraping limescale off it but rather fit a new one!

Black and charred resistor? – not good, so unless you can sort that it surely will need a new PCB plus a heater. The E52 tacho fault would also need some scrutiny to ensure the motor is 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} before plugging the new board in of course. But again, the heater could be causing that erroneous error showing?

[petercherry]

Re: AEG Lavamat (Zanussi) – E34 & E52 Errors

Thanks Martin for your concise reply. Hmm whether its worth fixing is debatable, new element plus PCB, and its not guaranteed. Think I might lookout for another second-hand one, good job I have a couple of machines – the other one is doing overtime at the mo!

Peter 😉

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