Vienna Brühgruppe blocked

[haguedick]

Hello from France.

I have replacing micro-controller (it was kapput) and repairing the electro-magnet support with metal piece (it was broken) on Vienna.
I switch on the power :
- the boiler became hot, then the kaffee light LED stop blinking.
-I push the Kaffee switch then Mahlwerk run, after dosierer work.Few seconds later die pumpe arbeit.
I ear clac, clac, clac only water falls in the cup.
Now the brühgrupper is blocked in koffee position and I can't remove it.
In order to re-positionning it in neutral position i have run testprogramms.The motor try to work but it can't,it seems to be very bloked in high position.
I should have test it without case, so I could have dismount motor axe on rear pannel.
As motor is working I don't think BD247/33V zener are kapput.

What can I do, Doctors ?

Danke

 

[ksb]

Did you remove the brewing unit ?

 

[haguedick]

Did you remove the brewing unit ?

Excuse me I don't understand what is brewing unit.
If the solution is to un-screw the scew that is in on photo, I can try; tell me.
Thks

 

[ksb]

"brewing unit" is the english name für "Brühbaugruppe"

Remove the screw on the picture with a screw-driver.

Afterwards you have to pull the unit with some force.

 

[haguedick]

Thanks a lot, I try after dinner.

 

[haguedick]

Full success,thanks a lot for your help.
Now I have to carry on investigations.
I wonder if the brewing unit could be faulty.

 

[ksb]

I hear clac, clac, clac only water falls in the cup.

may be:

- too much coffee in the brewing-unit ?
- brewing unit routh running ?

 

[haguedick]

When I try to simulate power axe, it's very hard to turn.
By un-screwing all screws, I will dismount it and clear properly all the mecanical.

 

[ksb]

use one of these manuals:

1. Leitfaden zum Zerlegen und Reinigen einer Saeco Brühgruppe ---- Autor: Christian6110
2. Brühgruppe komplett zerlegen Grundreinigung ---- Autor: imbissrudi

No. 2 is easier to understand i think

Take care if the word "vorsichtig" appears....

 

[haguedick]

In fact, I will stop and read before doing mistakes. I will try to be prudent.
I'll give news as soon as possible.

Thank You for help and links.

 

[ksb]

good luck !

 

[haguedick]

Hello,
All has been dismounted carefulness and cleaned. I grease as it is shown in pictures of tutorials.
It runs fine now. Yes it needed maintenance.

A fundamental question for me now before pluging brewing unit and listenning a big crack:

After removing brewing unit i have tried to find neutral position on axe motor.

I have unplugged JP15. With test program i pushed café button to place the axe in neutral position.
I have plugged JP15 and power on the machine.The motor runs on left or right and stop but at a wrong position.
I have surely made a fault, but I don't find the good procedure to calibrate the neutral position.

What do i have to do?

Thanks

 

[ksb]

Hello haguedick,

1. remove the plug for the limit switches of the brewing unit
2. move gear to the right position in the test mode.
3. connect microswitches again
4. manipulate the switch "brewing unit inserted" with some paper
5. switch off and on (without brewing unit inserted !)
6. machine must move to the right position

regards KSB

 

[haguedick]

Hello ksb,

It does not work:
1. I have removed the plug JP15
2. I switched power on, run test mode and move gear to neutral position.
3. I connect JP15 (without switching off the power).
4. Insert piece of plastic to simulate "brewing unit inserted".
5. Switch off and on without brewing inserted.
6.Then motor turn to a wrong postion.

I have done as you said, so i wonder if:
- it could be an offset position due to the clac,clac,clac before.
-in this case, may be i have to dismount the gear and have a look on the rear face.

But before I break other pieces there is a soft solution?

Regards

 

[ksb]

One more try please:

1. Move the gear just to one of the limit switches
2. remove JP15
3. move the gear further IN THE SAME DIRECTION (without unit!)
4. reconnect JP15
5. Insert piece of plastic to simulate "brewing unit inserted".
6. switch off and on again

 

[haguedick]

no success!

1. To move gear to one of the limit switches, i have to remove JP15 first.
3. I can't choise the direction (always reverse-clockwise).

Test mode and calibration with new micro-controller could be different(?).
As I begin to loose patience and i have to be prudent with 220v I will continue to morrow.

Thank you and regards

 

[ksb]

The unit must move in both directions in test mode.

Does the feedback-LED lit all the time?

 

[haguedick]

No, not all the time.
The café LED lit sometimes.
During test, the button i push is Dampf, then the gruppe try to return in neutral position in reverse-clockwise.

Nota: During all test mode, I simulate ""brewing unit inserted" with plastic piece.

I have surely done a mistake: "So close yet so far"

 

[ksb]

OK - the LED must be lit only when the gear is at one limit switch.
It looks like this is working the right way - maybe there is a problem in the gear.

Is there any noise at some positions?

 

[haguedick]

I begin to understand why sometimes this LED lit.
It is a good news, that mean i haven't correctly done procedure.
No noise at all.