T i m wrote:
Hi All,

The washing machine (AEG Lavamat 6100 Digitronic), seeing the recent
attention the tumble dryer has had (when I replaced it's bearings) has
decided it want's some TLC and started tripping the RCD, again. ;-(

It did it a while good ago when a good blow through with the air line
and a new pair of brushes had it running ok (I changed the bearings
and seal a few years before that).

So, with the motor earth isolated from 'earth' all runs ok, earth the
motor and the RCD trips. With the motor running I generally see ~30VAC
between the motor chassis and ground.

The fault seems to between the field coils (stator?) and earth,
measuring around 18k ohms on my DMM, even after another good blow
through with an air line.

I am wondering if some carbon has got down to where the external
wiring joins the stator windings and is conducting to the motor frame?

The next step may be to try and strip the motor further and see if I
can get the stator coil out and see if I can see / measure anything?

Any other thoughts / ideas please?


Don't waste your time. I did all that, and nothing was apparent. Put in
a new motor, and hey presto, megohms or better.

IIRC it was ALSO about 18k..odd asint it.

Of a crap hoover machine..

All the best ..

T i m

p.s. I guess if it was on the non RCD side of my CU I wouldn't even
know there was a problem (well, till it caught fire or whatever)?



I know what you mean. It happened suddenly and irrevocably on ours.My
guess was insulation had broken down under some kind of vibration.


XCHG price on a new was about 50 notes. Less hassle than spending hours..