[bobokines]

Re: Hotpoint dryer tcd970p error code f14

Anybody?

[bobokines]

Re: dedetricht oven dod438xu11 module

Thanks for that 😀

Bob

[bobokines]

Re: Bosch condenser dryer wte84103gb/08

thanks. it is the door switch. it’s in a laundry room in a hotel 😥

bob

[bobokines]

Re: Bosch condenser dryer wte84103gb/08

Thanks Paul. I did check the door switch and it seemed ok but I didn’t check the wiring back to the board. I will go back tomorrow and have another go

Many thanks

Bob

[bobokines]

Re: Hotpoint built GE washing machine model w86 timer knob

Thanks again Jim. I will order the disc and see what happens

😀

Bob

[bobokines]

Re: Hotpoint built GE washing machine model w86 timer knob

Thanks Jim. I’ll try that. Any idea what a HPT1602644 Control knob is? I guess that might be the bit on the outside that you turn…

I remember when they produced these machines, they were nearly 700 pounds!!! for a bog standard hotpoint with a fancy facia!

[bobokines]

Re: Diplomat ABA9242 Hinges required

Thanks Mark

You’re a star

Bob

[bobokines]

Re: zanussi dryer zdc46130w

Thanks Jim.

It was a faulty relay on the control module.

Many thanks for your help

Bob

[bobokines]

Re: Diplomat adp8342 (Chinese) motor required

Thanks Don.

Where would we be without you?

Bob

[bobokines]

Re: Whirlpool double oven model AKZ161/03/IX 858516115122

Thanks John.

That information will help no end.

Bob

[bobokines]

Re: whirlpool dryer awz6303 fan housing

Thanks Martin. 😀

Bob

[bobokines]

Re: AEG 74620-W Door wont open (pnc 91400130400)

I have had this before. It was a high level contact that was sticking. I think contacts 31-32-33. If I remember right it would stick only after a heat pause. Which meant it would seem ok if I only tested it on rinse and spin. The spin inhibit is taken from contact 11-12-13. The machine would still spin as the low level contact was ok.

Bob

[bobokines]

Re: AEG 74620-W Door wont open (pnc 91400130400)

Think you will find the pressure switch sticking. It will be one of the higher levels. The machine still thinks it has water and will not release the door.

Bob

[bobokines]

Re: Electric motor design question?

Hi there boys. It’s not to do with leading or trailing edges, it’s all about armature reaction.

This is the twisting of the magnetic flux caused by the rotating armature.

The carbon brush does two things.

1) It supplies current to the armature. In an ideal world the brush should have as low resistance as possible so as to reduce losses in the brush (and therefore heating).

2) to provide commutation. Commutation is the shorting out of the back emf induced in the armature coils. :- When a coil moves inside a magnetic field a voltage is induced across the ends of the coil. If this is shorted out then a current will flow producing a spark and heat.

When the brush moves over the commutator it will short out two or more adjacent segments. If there is a voltage present between these segments, then current will flow and the brush will heat up and a spark will form. The secret to good (spark free) commutation, is not to have any induced voltage across those commutator segment being shorted out by the brush.

On non-reaction brush gear motors, the brush gear is normally half way between the field coils. At this position, the brush will short out the coils that are passing between the field coil poles. ie no voltage is being induced as there is no magnetic flux present. Unless the motor is overloaded, the brush will not spark and will last for a long time. Also the motor will rotate at the same speed in both directions (given the same supply voltage)

On reaction brush gear, the brushes are twisted so that the commutation happens nearer to the magnetic field in one direction and further away in the other direction. This will allow much higher speed and higher torque in one direction than the other.

Because (in a washing machine) the speed is controlled by a tacho feedback, the varying speed (relative to direction of rotation) is not a problem.

During high speed rotation, the magnetic flux (produced by the field coils) is twisted by the rotating armature. (This is called armature reaction) The designer of the motor will have twisted the brush gear just enough that the brush will short out the commutator segment at the right moment in time so as to reduce sparking.

Another interesting point is that the higher the resistance across the face of the brush the better the commutation. This is why most reaction brushes are laminated… low resistance along its length to reduce losses and high resistance across the face to improve commutation.

Hope that helps a little

Bob

[bobokines]

Re: Beko WMA 520W

http://www.beko.co.uk/manuals/WMA520.pdf

page 11

Child Lock
To prevent operation by children you may
activate child lock while the machine is in
operation.In order to activate the child lock,
press Prewash and Time Save function keys
simultaneously for 3 seconds after the washing
programe has started. The prewash indicator
light will flash continously.
Only the on/off button can be used when
child lock option is selected.
To start a new program after the program
is over or to adjust with the program, child
lock should be deactivated. The child lock will
be deactivated when the same keys are pressed
together for 3 seconds and the Prewash
indicator light will go out.

[Author]

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