Washing machine motor RCD trip

[AndyPRK]

Any clues as to what could be wrong with the motor, that would cause the RCD to trip when it starts the spin cycle

 

[Jurassicspark]

It can be carbon dust in the motor.

Or cumulative earth leakage.

 

[foxhole]

Could be worn motor brushes,Easy fix if that’s the case .

 

[AndyPRK]

Sadly I don’t think cumulative earth leakage.

It’s not the brushes

 

[Jurassicspark]

N to E fault and you're just blaming the machine?

 

[AndyPRK]

I swapped the motor out and it seams to be fine.

Just worried the bearings aren’t that good in replacement motor, so wondered what actual problem was

 

[Jurassicspark]

I swapped the motor out and it seams to be fine.

Ermm, the motor then?

 

[AndyPRK]

But where is the contact to ground?

I swapped brushes between motors, so it had a good set in it.

 

[jj4091]

N to E fault and you're just blaming the machine?

Pretty sure it will be the machine if it goes through the waash cycle but not spin. My first thought would have been brushes or carbon dust, like you, but sounds like a new motor job if they have been ruled out.

 

[jj4091]

I swapped the motor out and it seams to be fine.

Just worried the bearings aren’t that good in replacement motor, so wondered what actual problem was

So you are saying the macchine now works with a different motor and the old motor com, brushes and holders are all good. In that case one of the coils must be short to earth. Bearings would cause an overload and trip an MCB not the RCD. The contact to ground will be through the motor body and the mountings or an earth connection.

 

[AndyPRK]

Yes, machine works with a replacement motor, and the old brushes.

240÷0.03=8K Ohms or less.

I don't think I could see any resistance to earth on any pin of the motor.

I guess I could connect the motor to earth, and liven 1 of the 4 motor pins at a time and see if one particular one caused a trip

Motor turned a bit before it tripped, but I don't think this means alot, as the connections are in series