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- > Do-It-Yourself Appliance Repair Help > The Laundry Appliance Repair Forum > A friggin Mouse Killed my ASKO 20005 Type WM220A.

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A friggin Mouse Killed my ASKO 20005 Type WM220A.  Rating:  Rating
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 Posted: Mon May 25th, 2009 09:42 am
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CarlB
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I’ve had this Asko washing machine for about 13 years now and LOVE it. Bought it new with Asko Condensor Dryer for $4500.

Has never given fault except for a couple of months ago when I had to change the water pump. Did it myself for $35.

I’ve owned 4 asko washers over the last 20 years and have had positive experiences.

On with the problem:

A couple of weeks ago I threw a load of washing in to the machine only to notice that it was not rotating the drum after the water had loaded. On closer inspection I could hear a slight ‘whirl bel’ sound and then could smell burning.

I shut the unit down.

Moved the unit outside to do a tear down, and as I did so a mouse ran out. (Alive)

Looking inside I could see that the mouse had been living in the control board of the machine. Mouse poo and urine all over the heatsink, and one turd shorting out the MOSFET on the left to the point that the MOSFET had a hole between the source and drain and was shorted.

I disinfected the board and then removed the two IRF840 MOSFET. Only the left one was fried.
Replaced them, tested the diodes and resistors around them, and then wired the board back into the machine.

RESULT: Washing machine ran though a cycle correctly with agitation working normally. HOWEVER, it will not spin. Ran the ASKO test program and everything works EXCEPT for the spin cycle. So some progress.


I pulled out the remaining MosFets as marked in pic 2 [IRF 740] and tested using 12 volts and a lamp and making sure that the lamp turned on when the gate got power, and lamp went out when gate was grounded. All seem fine.

Where to from here? I’d rather try to fix this then buy a new board at circa $600.

http://www.repairclinic.com/SSPartDetail.aspx?s=b126a11c212i1266704&PartID=1266704

Could this part be at fault?
See Pic 3.
Says Texas Instruments on the casing. I thought it might be a halls effect sensor but cannot find a trigger. Also it seems to be shorted – no resistance with vom.

Also, what is this part for?
See Pic 4.
Saga continues with another ASKO on separate post.

Any help would be Appreciated.

Attachment: ASKO20005-01.jpg (Downloaded 43 times)

Last edited on Mon May 25th, 2009 09:44 am by CarlB

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 Posted: Mon May 25th, 2009 09:45 am
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CarlB
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Pic 2

Attachment: ASKO20005-02.jpg (Downloaded 43 times)

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 Posted: Mon May 25th, 2009 09:47 am
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CarlB
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PIC 3.

Anyone know what this thing is? Hall's effect sensor? I cannot see a trigger.

Or thermo related?

Or does it measure the coil field?

The red illustration above it is the side profile.

Attachment: ASKO20005-03.jpg (Downloaded 43 times)

Last edited on Mon May 25th, 2009 09:47 am by CarlB

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 Posted: Mon May 25th, 2009 09:48 am
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CarlB
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What is this thing for? All ASKO washers seem to have it.

Attachment: ASKO20005-04.jpg (Downloaded 43 times)

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 Posted: Mon May 25th, 2009 11:40 am
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Budget Appliance Repair
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Pic 3, part circled in red looks to be the "Thermal Overload".  It should read shorted if it is closed and working,  when the windings overheat it opens and shuts down the motor so the motor doesn't turn into a ball of flames!!!!!!




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 Posted: Mon May 25th, 2009 04:43 pm
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CarlB
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Thanks B.A.R.

So if that silver thing is just a thermal switch, I take it that the ASKO motor drive doesn't need a tacho in the brush less motors?

What I cannot understand is why if I have agitation, can I not get spin? Wouldn't the same motor drivers do both?

Cheers,

Carl

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 Posted: Mon May 25th, 2009 05:01 pm
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I don't have a service manual for that model, unless it's similar to another model ...

here's some info...

 

Attachment: Pages from Asko Washing machines EN WM90 - WM200.pdf (Downloaded 7 times)



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 Posted: Mon May 25th, 2009 06:01 pm
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CarlB
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Do you have any more info on the model you quoted? It seems to be the same as the one I've got.

I already had the test procedure stuff, but the information on how the unit determines load balance is interesting. It appears that the unit must estimate an imbalance by measuring the load the motor requires over a brief burst of time.

I doubt that I will be able to fix this problem without some schematics / test procedures for the computer. But I am wondering if there was an electrical spike that has fried the tach part of the circuit so will probe that area of the board.

Any additional ideas always welcome.

Cheers,

Carl Berggren

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 Posted: Mon May 25th, 2009 06:09 pm
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the pages I posted are for the WM220 (notice model number in lower left corner)

The other pages are the same info, but for the other models ...

If you know of a model similar to the WM220,  
that the schematics, Controller, etc, may be the same.. let me know.

 

 



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 Posted: Wed Jun 3rd, 2009 01:29 pm
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dsmc
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A thermal fuse I think

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 Posted: Wed Jun 3rd, 2009 01:34 pm
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dsmc
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This device and others are explained in the wm200a us parts manual let me know if any more info required
dsmc

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 Posted: Wed Jun 3rd, 2009 01:42 pm
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dsmc
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Hi Carl
We may be able to help each other I have same unit 20005 13 years old
Blows fuse when you close door.
I need some info on the motor ie how to test it with an ohm meter?
dsmc


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