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EQ9 S500, loud bang motherboard through !

Need assistance

Marv21

July 13, 2023 08:48 am

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Coffee drinker

Group: Mitglieder

Posts: 3

Member No.: 67337

Joined: July 13, 2023

Hello everyone,

First of all Siemens eq9 S500 from about 2017

Problem

At the beginning the machine reported bean refilling and zack went nothing more, after opening I noticed that the thermal fuse of the grinder was through, directly a new ordered including cable set. Grinder cleaned and changed the coal and everything ran.

2 Tsge later it went poof and the grinder no longer went, I thought ok the grinder is too warm and the fuse is through again. There was no error message.

Since I could determine that the grinder had a brush fire was present I was fed up and ordered a completely new with everything that goes with it.

Installed and no it does not work.

Now I looked at the module or the control electronics and lo and behold, short circuit on X1. Machine runs perfectly only the grinder gets no juice. According to the test menu there is an error.... NTC 2 no signal.

Short hand I got a new board, but now I do not dare to connect this. I have now paid 250 euros for the new electronics and the grinder. My hope is to install the whole thing and everything is good again.

But I have concerns to shoot down the new electronics.

I have found a bare spot on the cable to the NTC, maybe that was the reason for the bang. Both connectors that go to X1 are black.






Attached Image

kaffeechris

July 13, 2023 05:11 pm

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Expert

Group: Moderatoren

Posts: 2077

Member No.: 24425

Joined: May 29, 2014

Hello, well there it is similar with me with circuit boards. Either you do it or you don't.
Repair the torn cables with heat shrink tape. Or remove the cable lug and put a new one on.
Before I would measure the cables all times with the multimeter (ohmic).

Oh yes the shotgun can still throw in the grain. Please much later.
ohmy.gif



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Marv21

July 15, 2023 06:33 pm

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Coffee drinker

Group: Mitglieder

Posts: 3

Member No.: 67337

Joined: July 13, 2023

New mainboard in... New grinder inside... New ceramic valve inside.

All seals renewed and greased.

Machine runs like the first day.
Coffee tastes great!!!

Hope you do now another 7 years

Cost is just around the 300 euros... we would not have gotten a new one

kaffeechris

July 15, 2023 08:44 pm

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Expert

Group: Moderatoren

Posts: 2077

Member No.: 24425

Joined: May 29, 2014

Hello, respect, there you go. biggrin.gif



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Alles ist Wiederverwertbar, sogar diese Buchstaben.
Keine Anfragen oder Hilfe, über E-Mail.