Beko WM622W Blowing Motors?

[Bloke152]

Hi All,
Hopefully someone might have an idea of what could be going on with my washing machine!

At some point during the cycle (we were in a different room) The electric tripped. I Worked the cause to be the washing machine.

I took the back off, disconnected the heater, plugged the washing machine back in and it still tripped! This was a fairly instant trip, the lights came on on the washing machine display for about 3 or 4 seconds but then it tripped

I re-connected the heater and disconnected the motor, plugged the washing machine back on and the electric didn’t trip! I left it for about a minute this time and still no trip! So I decided the issue was the motor.

I ordered a replacement motor on ebay and fitted it. Turned the machine on. It did a full wash!…then at some point during the second wash. POP! Same again.
Again, it appears to be the motor. This time however, it does not trip until you start a program.
I have proven it is the motor this time as it trips at the start of a program. I disconnected the motor and managed to get it to drain out the water. Plugged the motor back in and it wont pump – again – it trips.

Is it possible that the machine is doing something to blow the motors?

Any help/Advice greatly appreciated!

Many Thanks!

[electrofix]

1 is the motor new or used

2 have you measured the insulation resistance of the motor to see if it has a problem

3 sometimes the carbon dust from the brushes can cause the problem and all it takes is a clean

4 is the motor the correct one for you model ?

Dave

[Bloke152]

Hi Dave,

Thanks for the reply.

1. It was a used motor – but it must have been working to perform the first wash – right?

2. Not yet, I’m awaiting a multi meter – should be here tomorrow so will check both motors then.

3. Is this cleaning inside the motor? Whats the easiest way to do that? soft brush into the gaps?

4. Yes, I made sure I brought one with the same model number to the one I took out.

Many Thanks

[electrofix]

just remove carbon brushes and dust off all carbon dust and replace

Dave

[Bloke152]

Thanks for that.

ok – I have removed the carbon brushes on one of the motors, given it a good clean with a paint brush. Replaced the motor but still tripped.

I have managed to get the multimeter to the motors now, below are the readings. I think these are ok?

Motor 1
Brushes – 2.8
Casing 1.1, 2.2, 1.6
sensor 90

Motor 2
Brushes 2.8
casing 1.1, 2.3, 1.5
sensor 89.6

All wiring that I can see going to the motor appears to be ok. Im not sure what to check next?

Many Thanks

[Bloke152]

should also add, when testing. I didn’t put the motor back into the machine, just connected the wires. when the trip blew there was a viable flash from inside the motor.

Thanks again

[electrofix]

the trip is detecting earth fault so you should test the motor to earth

put one of your leads on the metal motor case, set to a high scale like 2M ohms and try each connection in to see which have the fault.

My guess is it will be the armature

Dave

[Bloke152]

ok, meter set to 2m ohms. 1 lead on the metal case then going through each connector at a time. the only ones which reads anything other than 1 (barring the one which connects to the case) are the brushes, they are reading .065 on one motor and .028 on the other one. Does this prove anything?

[electrofix]

yes it sounds like the armature has failed so its a scrap motor

to prove 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} take the brushes off and test between the casing and the commutator. if you get the same reading then you have found it

Dave

[Author]

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