Hotpoint FDW20 dishwasher I’M lost for ideas :)

[techstein]

Re: Hotpoint FDW20 dishwasher I’M lost for ideas 🙂

Hi Jackal /Iadom

Jackal the pump was isolated and is not regulated by the PCB,especially when isolated..as clearly mentioned in 2 posts..

No other components were tested live ,so I am not quite sure what the concern is ,i did basic continuity tests , no mains power involved what so ever..

for your referance

I used this site to check water level Pressure)switch
do you folks see this method of testing unreliable ?

http://www.acmehowto.com/howto/applianc … rlevel.php

Iadom thanks for you technical input it is appreciated

“Neither the pressure sensor or the pressure switch will stop the drain pump from working.”

You have either got a faulty PCB or possibly main circulation pump motor.

Iadom
If the main motor TOC trips then the machine will not drain out.

what is TOC ?

S/N is 503300238
thanks techstein

[Jackal]

Re: Hotpoint FDW20 dishwasher I’M lost for ideas 🙂

techstein

Your postings do not make it abundantly clear how you are actually conducting the tests you are making and as this is a public forum, I as a moderator, am under a duty of care to other public users of this forum for ensuring they are aware your methods of fault finding are not approved. We are here to help where we can but safety is and always will be our prime concern.

You have now had three moderators question the safety angle of your component testing and I think that says it all really.

You seem to have some technical knowledge but sadly others might not be so secure and or robust in their abilities and so the descriptions you are giving could lead to potential problems. I am sure you, like me would never wish to see ANYONE hurt or heaven forbid killed so I and the other moderators err on the side of caution in such matters.

I wish you well in your endeavours to resolve your problem but it is always safety first.

Regards

Jackal

[Jackal]

Re: Hotpoint FDW20 dishwasher I’M lost for ideas 🙂

PS TOC is thermal overload cut-out. If the component it is protecting gets too hot (as it can during extended use or if it becomes jammed for example), it trips out, effectively shutting the appliance down.

Thus if the circulation motor, after a period of running gets too hot for any reason (weak bearings/jam or because its simply worn out) the TOC kicks in and prevents the unit from continuing for safety reasons.

This would, in theory account for the initial problem you described.

Hope this helps

Regards

Jackal

[techstein]

Re: Hotpoint FDW20 dishwasher I’M lost for ideas 🙂

Jackal ,
I understand and appreciate your concerns ,
and certainly like you I would not like to see anyone harmed.
Yes safety is a primary concern for all..

“you mention
You have now had three moderators question the safety angle of your component testing and I think that says it all really.

Just for clarity sake it is mentioned several times that the
components were “isolated”, the first moderator may not have been aware of this,

Surely the second 2 moderators were aware if they read the posts it is absolutely clear.

thanks for the the response to the query I had regarding “TOC”

thanks
Techstein

[iadom]

Re: Hotpoint FDW20 dishwasher I’M lost for ideas 🙂

techstein wrote:

I used this site to check water level Pressure)switch
do you folks see this method of testing unreliable ?

http://www.acmehowto.com/howto/applianc … rlevel.php

Not worded very well, and you have misunderstood the information. It does not state that you should get continuity between all terminals at any stage, only between one set when open and one set when closed.

‘Now blow gently into the air pressure connection and retest. It should click and you must maintain the air pressure while testing. For the two pairs that read infinity ONE should now show good continuity. The pair that previously gave of reading of continuity should now give a reading of infinity.’

PS. your machine has a drain pump that is wired in ‘series’ with the main circulation pump.

[techstein]

Re: Hotpoint FDW20 dishwasher I’M lost for ideas 🙂

Thanks Iadom for a great response ,with clarity
it is certainly apreciated ..

just a few queries if i may,
Anyone reading this do not touch motors or capicators unless
you are sure what you are doing safety wise.
Ensure the machine is also unlpugged
And parts also isolated..

1)Is this a set rule ? that could be applied to other switches with 3 lugs
“For the two pairs that read infinity ONE should now show good continuity. The pair that previously gave of reading of continuity should now give a reading of infinity.'”

2)Is it worth changing the capicator on the motor ,

3)I am not sure if this is used to shunt the motor to start
of if it is also in use while the motor is running ?
just in case ??

Thanks Techstein

[Martin]

Re: Hotpoint FDW20 dishwasher I’M lost for ideas 🙂

techstein wrote:1)Is this a set rule ?

Yes!

techstein wrote:2)Is it worth changing the capicator on the motor ,

Wouldn’t harm, they’re cheap enough!

techstein wrote:3)I am not sure if this is used to shunt the motor to start

Exactly that! :tup:

[Author]

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