smeg built in dishwasher flashing all lights

[DDA]

i have a smeg dishwasher that’s stopping and all the program lamps are continuously flashing. there is no beeping or any kind of error code showing.
When inspected by our engineer the all the wash functions seem to work OK.

Fills
releases detergent
circulates
heats
drains

The only function that hasn’t been seen if the drying (fan) as we have left with the customer to watch and report to us if there was any errors.

We don’t have the model at the moment but the control panel has from left to right :

on /off on the far left
“eco” button and lamp to the left

on the right side of the panel three is:

A bank of program lights and a program selector button.

any help would be appreciated and i will try and get a model number asap but is worn in the label

many thanks

[eastlmark]

Re: smeg built in dishwasher flashing all lights

all lights flash when the door is opened mid program, so have a look at the door lock either for burnt switches or the pin through the latch slipping out of one end.

[DDA]

Re: smeg built in dishwasher flashing all lights

thanks i will give it a try

[DDA]

Re: smeg built in dishwasher flashing all lights

ok, i have checked the door switch but there is no sighs of any faults. i have had the machine collected to the w/shop and have spent some time testing and watching.

the dishwasher seems to run for a minute then stops, turning the program selection and the “eco” LEDs off and then on again, the rinse-aid and the salt LEDs stay on.
then the pcb beeps twice then the motor starts running again.
this then repeats

the symptoms are exactly as if the machine was powered off and then quickly on again straight away at the plug or the power switch. (different to if the doorbeing opened as this would leave the cycle light on.)

i have tried another mains suppressor (not the exact part but is a d/w suppressor)

i have tried another mains lead

i have bypassed the wiring from the mains suppressor to the power switch

i have by passed the power switch

nothing i have tried has made any difference

the only other issue that may have an part to play are the “eco” led (fitted too a separate pcb to the main pcb) flickers once the initial drain had finished and the d/w is filling (is static then the d/w is running the initial drain)

this has stayed the same through all tests.

also the mains filter looks like it has blown in the past but seems to be working atm

[Hollytree_Technical]

Re: smeg built in dishwasher flashing all lights

Have a look at this.

Jem

[DDA]

Re: smeg built in dishwasher flashing all lights

that sounds like the ticket, ill give it a try and let you know
thanks

[eastlmark]

Re: smeg built in dishwasher flashing all lights

It must be an oldy if it has the pcb in it.

[electrofix]

Re: smeg built in dishwasher flashing all lights

agree its the power supply cap gone

you only have to replace the large 1.5uF cap the other 2 will be ok

what is happening is the module is running out of power when it tries to turn on the heater relay and the computer crashes, reboots, and starts again

Dave

[Author]

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