Candy washing machine jumping around

[hotponyshoes]

I have a candy washing machine,
Towards the end of the wash it has started violently vibrating and jumping around then stops with an E08 error code.

My missus had googled the problem and said it was probably the motor brushes either worn out or sticking.
I removed the motor and checked/cleaned the brushes which looked fine.
Didn't help.
I then googled myself and found some suggestions that it might be the motor speed sensor.
I have not been able to identify the speed sensor on the parts diagram but I reckon its the ABS type thing mounted on the rear of the motor.
Couldn't find one separately so I bought a complete motor and the machine still has the same problem.

There are 2 shock-absorber things holding the drum but they seem ok (only checked by hand)

Any other ideas before it goes to the scrap and I just get a new one?

 

[pedrobedro]

Any other ideas before it goes to the scrap and I just get a new one?

Take the drum out to make a fire pit for the garden Seriously though it can be simple as worn brushes.

 

[Kram]

Towards the end of the wash it has started violently vibrating and jumping around then stops with an E08 error code.

So only when its doing the fast spin?
I cant see brushes being the cause, not if the motor is getting upto speed.
I'd be looking at drim bearings.

 

[hotponyshoes]

So only when its doing the fast spin?
I cant see brushes being the cause, not if the motor is getting upto speed.
I'd be looking at drim bearings.

Apparently it is ment to rotate backwards sometime around when it starts shaking.
It does get up to full speed (while shaking).
I don't think it's brushes either as (apart from fitting a replacement (used) motor I've also bypassed the door switch and I'm not able to stall it by holding the drum so it seems to have plenty of power.

Doesn't look like the drum bearings are replaceable although it's hard to check them as the whole drum seems to be free to move in all directions.. maybe I'll strip some more panels off and see if I can find anything that ment to be supporting the drum..

 

[Gareth J]

A concrete lump becoming detached? Had one do this once. Did fudge it back in place which worked for a while but not long

 

[Blobber]

Is the load imbalanced? we only get problems if its a few items in the machine especially if its something like towels
Candy are good machines, we had one that did 10 years of abuse with people stuff and dog stuff, often in use 2 or 3 times a day

 

[hotponyshoes]

Is the load imbalanced? we only get problems if its a few items in the machine especially if its something like towels
Candy are good machines, we had one that did 10 years of abuse with people stuff and dog stuff, often in use 2 or 3 times a day

It does it when empty. Not as bad but still bad enough.

Apparently it's got some sort of auto-balance detection but I can't see any sign of a separate balance sensor on the parts diagram so I guess its sensed via motor load somehow.
This one is not very old at all, might still be under warranty but she can't find the paperwork...

 

[Cobbler]

We had our Miele jumping around when on spin & it was the 2 dampers, one each side. not a lot of money to replace, can’t recall how much though.

 

[hotponyshoes]

Not much wrong that I can see,
The whole tmdrum assembly is suspended by 2 springs which are both fine.
2 Shock Absorbers on the bottom which are both fine.
2 concrete blocks which are both tight.

Now I've got the top off I can hold the outer drum and spin the inner and the bearings feel good with no slop in any direction.

Motor wires run to the pcb (there is a capacitor in line as well)

I suppose the replacement motor could also be duff? I guess the black thing on the back of the motor with the 2 wires is the speed sensor? How do I test that?

 

[Blobber]

Job to see but the bit where the brushes run looks a bit manky, I did have a brush holder melt a bit making the brush sticky

 

[Kram]

I guess the black thing on the back of the motor with the 2 wires is the speed sensor? How do I test that?

Can you use a tachometer on the drum, one of those IR things?
Imagine the speed sensor will output pulses, if you have frequency measurement on a multi meter. Could be a hall sensor or some kind of LED pulse wheel.

 

[mike 109444]

As Candy, Hotpoin, Hover (an many more) are all built in the same factorys when you google the w/m "jumping on spin" look at other makes in the results. Yes thatis a taco on the rear of the motor. I think your most likley cause (epecally if it's doing it with no load) is the dampers if the main coil springs are not broken as you say.
Ref Warrenty, If you bought it with a creditcard you should have the "proof of purchase" date ect. Mr AJ electronics should be able to clue you up on the procedure for proving and claming. Most of these m/c's have a sticker on that prompts you to regester your m/c after purchase.

 

[Gareth J]

Do you think the shock absorbers are still damping? I guess if they are not effectively doing so the spin could resonate the machine more

 

[ajlelectronics]

It does it when empty. Not as bad but still bad enough.

Apparently it's got some sort of auto-balance detection but I can't see any sign of a separate balance sensor on the parts diagram so I guess its sensed via motor load somehow.
This one is not very old at all, might still be under warranty but she can't find the paperwork...

A proof of purchase will do, even a bank / card statement showing it.

 

[Guineafowl]

The sensor looks to be a two-wire, likely a simple variable reluctance type. You could try measuring either frequency or ac voltage. Scope would be better.

 

[hotponyshoes]

I'll have a look through the card statements later, the latest date I can find on one of the parts stickers is Jan 23 so it can't be 3yrs old yet..

The shockers seem fine to me (compared to car ones)

 

[hotponyshoes]

The sensor does show a resistance on a meter.
It also shoes a voltage.
Both change when I spin the motor by hand.
Tested both motors I have here and the sensors on both are pretty much the same.

The 2nd motor I got was used so its possible it also has the same fault?

The thing I thought was a capacitor in the middle of the wiring loom is listed as a noise suppression on the parts list. Not sure if it's worth trying to bypass that?

Looms tests out good so it's really only the motor or the main pcb that can be faulty.
It has an NFC chip on the main pcb (to set programs etc from a smart phone) I've installed the Candy app and it connects but won't download data which might be a sign of a faulty pcb?

 

[Guineafowl]

Noise suppression is normally simple Lin-Lout and Nin-Nout so you could just bypass it.

You could measure the resistance between pair of adjacent commutator segments, checking for a consistent reading, then do the same but with pairs 180deg apart. Do it away from the brushes or better still, pull the brushes back. Maybe a popped coil is causing a jerky output.

 

[ukracer]

Well you have me beat. My hoover washing machine was dodgy brushes. Fitted new ones it was fine. That said two years later and it's having a tantrum again, wandering around the laundrette. Must have another look soon...

 

[dave h 2]

Have you tried a voltmeter across the spin winding to see if it's pulsing the power?