Bosch Dishwasher SGS56E02GB/47

[oliver90owner]

First time the machine has given any trouble in about 12 years.

Dishwasher initially tripped mcb – but I didn’t know whether d/washer, microwave, fridge, toaster or paper shredder. 

Next MCB trip – found d/washer fuse blown (13A) and on replacement machine showed 2 hours delay before start. Wife informed me she had set 3 or 4 hours delay, so it appeared that machine blew the fuse after 1 or 2 hours with only the delay timer powered. Wash cycle was completed with no further trouble.

Next time the MCB tripped was after machine had completely finished its cycle (I think cycle had completed a couple hours before the MCB went out, but cannot be totally sure).

It has since tripped the mcb while approx 1 1/4 hours left on the ‘intensive’ setting. 

Worked OK since but it does mean it cannot be run overnight, or left unattended until fixed.

Suspect it is the power-in connector/arrangement (but need confirmation and info on removing that white cover over the lead entry without breaking it), or will accept any other diagnosis.

Thanks.

RAB

[Martin]

Re: Bosch Dishwasher SGS56E02GB/47

It’s not the “power in connector” but something else that involves removing side panels (with power disconnected of course).

Suspects are the heater and the main circulating pump. Is there signs of water in the base tray? Does the pump look corroded in the vacinity of the pump drive shaft seal? Do you have a test meter to determine the state of the heater element? Any signs of rodent activity?

Questions, questions. 😉

[oliver90owner]

Re: Bosch Dishwasher SGS56E02GB/47

Surely faults, such as heater breaking down to earth or even circulating pump would only occur while the machine is running? The heater, for instance, is presumably switched on the live side, not the neutral?

These trips are occurring before the wash program is initiated by the timer and after the wash programs have completed. I can look for leaks but they would be small or the float switch would trip the machine? So are you saying there are live feeds before and after the wash programs are actually running?

Agreed, these machines are not rodent proof (they could and should be), but the dog would most certainly not allow rodents to inhabit the house! She is a super ratter!

Regards, RAB

[Martin]

Re: Bosch Dishwasher SGS56E02GB/47

It may surprise you to know that these machines are indeed switched on the neutral side. Time to take a look inside.

[oliver90owner]

Re: Bosch Dishwasher SGS56E02GB/47

I am surprised! I will investigate further. Should I see a very burned mark when it has taken out the 30A mcb four times, now? No mark will mean testing the element to earth insulation? I will look on Friday and get back to you.

Thanks so far.

Regards, RAB

[oliver90owner]

Re: Bosch Dishwasher SGS56E02GB/47

Thanks guys.

Took it all apart to find what? The power input connection as black as your hat. My suspicions were correct. Nothing to do with leaks to earth on heater or pump. Just the one part that may have been able to be replaced without tearing the whole machine to pieces!

Can you supply this part, please. How much and is it easily fitted with the machine together, or do I need to re-assemble after changing it?

Can I attach pics to these posts? If so, I will attempt to show you what it looks like!

RAB

[oliver90owner]

Re: Bosch Dishwasher SGS56E02GB/47

Also, is the pipe wich descends from the loop on the side of the washer simply an open ended jobbie. It clearly sits adjacent to the incoming power connection as it, too, is blackened along part of its length. It seems as though it goes through a hole on the ba k section and then floats in fresh air.

[Martin]

Re: Bosch Dishwasher SGS56E02GB/47

The mains filter (00600233) is available here:

https://shop.ukwhitegoods.co.uk/600233- … suppressor

The complete power lead including all fixings (00483582) available directly from Bosch’s own spares website. (See attached photo)

The steam vent pipe that clips close to the mains filter will not cause any interference with if you simple clean it up and relocate it.

[oliver90owner]

Re: Bosch Dishwasher SGS56E02GB/47

Thanks.

I also note, on the schematic of the electrics, that only a pressure switch is to be found on the neutral side of the heater. The only other switch in the neutral line is the door switch, as far as I can see.

The pipe is only sooted up on the outside (from the burn flashes when the machine took out the mcb) so has been tucked back(?) into the hole in the base moulding.

I am amazed the machine was still operational. Is the need for a filter on the power supply simply for the electronic programmer?

RAB

[Martin]

Re: Bosch Dishwasher SGS56E02GB/47

It’s a mains interference suppressor, a legal requirement that manufacturers are obliged to install. It prevents spurious interference with other electrical appliances and devices such as radios, TV’s and remote control devices etc.

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