damaged pcb – drain pump doesn’t stop

[zio_mangrovia]

Model 911939224-01
TT50e

When I power on dishwasher, water is never loaded and drain pump starts immediately and doesn’t stop itself even if empty state occurs.
There is no anti-flooding system although service manual shows it but paper lists several models.
I checked directly the two pressure switch (both level and overflow) blowing in tubes, tester showed zero resistance and immediately after blow infinite resistance.
I wanted to check wiring for only level pressure switch disconnecting it from pcb, I used tester to check signal to connector with both water and no water. This worked fine.
I checked door switch was closed.
I think problem is in PCB, I call technician and He confirmed it
Then I desoldering only the gate pin on acs108-6s (overvoltage protected AC switch) and when I power on dishwasher, pump doesn’t start.
I think if problem was about drain pump driver circuit, dishwasher should have to load water and this one never occurred.
What can you suggest me now please?

[iadom]

Re: damaged pcb – drain pump doesn’t stop

Hi, you appear to be posting from outside the UK, possibly Italy?

The model numbers you give do not correspond to any well known UK makes or models, all I can find is reference to a REX dishwasher. We would not really be able to give you any advice on your problem, especially as you have been working on the pcb.

[zio_mangrovia]

Re: damaged pcb – drain pump doesn’t stop

yes from italy

[Martin]

Re: damaged pcb – drain pump doesn’t stop

Viva Italia!

che cosa fare è?

[Author]

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