How do I descale my Jura capresso?

Rinsing cycle at start up is electronically programmed function. Unplugging is a temporary solution.
Jura will not sell parts or offer any guidance.
I could look into more details to find an answer but the model Capressa 50 is not listed in my Data base.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edward_bbd2c7ff4ee1828a

Fortunately the problem you describe is not model specific. All Jura machines in the series C, E, F, J, S & Z models have the same problem. The Jura recommended maintenance is insufficient or erroneous. Here is how it occurs:
1- When new machine is set up, the instructions advice the owner to set up OK for use of Filter cartridges. This set helps only to display reminders for replacing the filter.
2- The initial set up instruction also advises that with regular use of Filter, descaling the machine will not be needed. That is really not accurate. Consequently, the reminders for descaling are delayed for over one year or more. This causes serious consequence with accumulation of Calcium deposits in the entire hydraulic and coffee system.
3- Use of Filters alone does not prevent Calcium deposits. Cleaning tables recommended & sold by Jura do not remove Calcium deposits in the coffee/water passages. The automatic descaling method recommended by Jura leaves the coffee side of the machine unclean. The error message in your machine is due to Calcium deposits in the Brew group, coffee outlet & the faucet dispensing coffee in the cup. I suggest all Jura machine owners should manually descale machine. Manually descaling includes use of 6 to 10 rinse cycles with descaling solution in the water tank. The error message "Clean Machine" is accurate. This error message is pointing to descale the Brew group, coffee outlet tube and coffee dispensing faucet by using rinse cycles.

After the rinse cycles are complete, refill Descaling solution in the water tank & continue descaling the rest of the machine by using hot water dispensing function, ½ cup at a time until the tank is empty. Finally, give a final flushing of machine to flush out remaining descaling solution inside the machine.
Services Unlimited Inc Parts Guru Since 1988

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edward_bbd2c7ff4ee1828a

All Jura machines in the series C, E, F, J, S & Z models have the same problem. The Jura recommended maintenance is insufficient or erroneous:
1- When new machine is set up, the owners click OK for use of Filter cartridges. This helps only to display reminders for replacing the filter.
2- The instruction also advises, regular use of Filters, eliminates descaling the machine. That is not accurate. Reminders for descaling are delayed or eliminated. This allows accumulation of Calcium deposits in the entire hydraulic and coffee system.
3- Cleaning tables recommended & sold by Jura do not remove Calcium deposits in the coffee/water passages. The automatic descaling method recommended by Jura also leaves the coffee side of the machine unclean. The error message in your machine is due to Calcium deposits in the Brew group, coffee outlet & the faucet dispensing coffee in the cup. I suggest all Jura machine owners should manually descale machine. Manually descaling includes use of 6 to 10 rinse cycles with descaling solution in the water tank. The error message "Clean Machine" is accurate & pointing to descaling the Brew group, coffee outlet tube and coffee dispensing faucet by using rinse cycles.

After the rinse cycles are complete, refill Descaling solution & continue descaling the rest of the machine using hot water dispensing function, until the tank is empty. Finally, give a final flushing of machine to flush out remaining descaling solution inside the machine.
Services Unlimited Inc Parts Guru Since 1988

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edward_bbd2c7ff4ee1828a

I have 3 different coffee machines and all 3 are descaling like you said using only the froter so that is normal .... Unless you misstyped the question

Yes
You should run the decalcify program with the JURA decal tablets or DURGOL. Do not use other agents.
See page 25 of user manual.

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Please dont forget to vote this answer was helpful

Many thanks

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The following web page has the instructions for mixing Jura tablets:
http://www.jura.com/download_information-sheet_jura_descalingtablets.pdf
I tried to find the same info in Miele's manual, but it didn't specify, but is probably the same as Jura:
http://www.cagrimmett.com/justanswer/CVA610.pdf
If you have the box or package that came with the tablets, it should say how many per volume of water. If it doesn't, contact the manufacturer.
Good luck, and hope this helps.

Did you descale the machine through the actual menu on the Machine? following the steps in the display window? If so, then it sounds like it needs to be sent in for service.

will start by itself after it was shutoff for after
7-12 hours suddenly ? Why

call the 'Coffee Boss"  in North carolina.  you will have to find him on Google. his name is heinz and he is the guy that Jura uses when they can't fix it.  He's fixed my x90 3 times.  
good luck

check out this link:
http://www.kuntze.de/E/index.htm