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Zanussi ZKN7147 washing machine Trips RCD and doesn’t complete program
Paul your assistance please. Problem with Zanussi washing machine ZKN7147J
On a 40 degree wash, when start button pressed machine trips RCD. When RCD reset machine starts ok and works through program wash rinse cycles until with 22 minutes remaining RCD trips again. When RCD is reset machine continues with wash & rinse cycles. However with one minute remaining door lock LED goes from steady on to flashing, and door can be opened, wash rinse cycles appear to be finished. But timer doesn’t reach zero and buzzer doesn’t sound. This is repeatable fault.
On 30 degree wash when start button is pressed machine starts ok and works through wash rinse cycles ok. Again with 22 minutes remaining RCD trips. When RCD is reset machine continues with wash & rinse cycles. However with one minute remaining door lock LED goes from steady on to flashing, and door can be opened, wash rinse cycles appear to be finished. But timer doesn’t reach zero and buzzer doesn’t sound. This too is repeatable fault.
I have inspected both PCBs, no evidence of blown electrolytic cap or overheating components. Main PCB pt no.EWM2500N.
I have replaced interlock, on the thinking that it was preventing the timer not reaching zero. Haven’t tried any other programs.
Washing machine is kept in a garage.
(Prod 91460443901. Type H1966334. Ser No. 438 00016).
Comments appreciated. Many thanks. Regards Howard