Caffeo CI - System Start, no pumping noise...

Hi everyone, I came across this great forum because of my Caffeo CI 970-101 which is on strike. I think it's really great that something like this exists. I have already scurried through all possible entries that sounded similar and have tried some tips.

Our KVA is now about 5.5 years old and has about 15,000 coffees under its belt. The machine is tight and has always served delicious coffee up until now. The grinder is a little noisy now, but that's probably due to wear and tear.

We have always cleaned and descaled the machine when it asked for it. We took the brew group out at least once a week and cleaned it with hot water. Then once a month I also cleaned it from the inside to remove all the powder and dried coffee grounds slush.

Now to my problem:

Yesterday it was time again and I cleaned the inside of the machine, dried everything and then ran the cleaning program, as usual, with two dissolved cleaning tablets in the water tank. Everything ran through flawlessly and there were also no special noises or similar abnormalities.

After that I started the descaling program, for this I completely dissolved two teaspoons of citric acid in the tank with about 1 litre of hot water. Normally I use a sachet of descaler from the DM, but I didn't have it at the time. The program started normally, but after about 10 minutes I noticed that nothing was happening and I waited another 20 minutes and there was no progress at all - so I switched off the machine...

When you switch it on it starts with "Descaling - Cancel" and the Rotary is flashing, when you press it you get "Descaling - Empty bowl and container", followed by "Descaling - Put hose in spout and bowl" Rotary is flashing, after pressing Rotary you get "Descaling - fill water tank", as there is already water in it, it continues with "Descaling - rinse machine" and you hear the usual noises, it moves a little and the pump should actually start, but it doesn't - after about 30 seconds, it goes into "Descaling - fill water tank" mode. After about 30 seconds it goes into "System Start" mode and the Rotary control knob flashes. When you press it the flashing stops but starts again after about 30 seconds, the progress bar runs through to the end but nothing else happens.

As it seems, the machine is stuck in the "descaling" program and doesn't get any further.

I have already tried the following
:- Reset the machine via "On/Off + My Coffee" - all
cables in the machine checked for tight fit- all
hoses checked for tight fit and continuity- flowmeter
opened and cleaned- machine
with filled water tank (descaler) overnight let stand- 12
hours without power and without inserted CR2032Since the

machine is in this state I come neither forward nor back. It would be great if you have a tip.

Many thanks Sascha

Hello,

Never decalcify with citric acid, which leaves a white residue when hot decalcifying (as is the case with fully automatic coffee machines). It is possible that the machine has become clogged with the precipitate and is therefore on strike.

I recommend you buy a descaler with amidosulfonic acid, e.g. the "Premium Descaler" from ceragol and try descaling with it or a run through the hot water outlet. This may dissolve the residues in the device.

Hi kaffeespezi,

thanks for the tip! I'll try tomorrow to get something like that and then try it out directly.

Greetings Sascha

Hi all, I tried it yesterday with good descaler and left it overnight. I disassembled the flowmeter and pump again and treated them with the descaling solution. Unfortunately it did not improve, but thanks for the tip anyway, the liquid descaler is much easier to handle.

My problem unfortunately persists, it seems the machine is stuck in the "descaling - abort" program point. I have measured the voltage at the pump, there are always 77 volts - directly after switching on the machine, until switching off - no matter which program step is currently pending.

QUOTE

When I switch the machine on, it starts with "Descaling - Cancel" and the Rotary control knob flashes, when I press it, it says "Descaling - Empty bowl and container", followed by "Descaling - Insert hose into spout and bowl". Rotary flashes, after pressing Rotary comes "Descaling - Fill water tank", as there is already water in it it continues with "Descaling - Rinse machine" and you hear the usual noises, it moves a little and the pump should actually start but it doesn't - after about 30 seconds it goes into "Descaling - Fill water tank" mode. After about 30 seconds it goes into "System Start" mode and the Rotary control knob flashes. When you press it the flashing stops but starts again after about 30 seconds, the progress bar runs through to the end but nothing else happens.

Is there any way to completely reset the machine program? I have already tested all the key combinations I could find on the net. ON/OFF + MyCoffee; ON/OFF + coffee strength; ON/OFF + 2x all for about 5 seconds each, along with plugging in the power plug after the machine has been unplugged for about 10 minutes. It can not be deterred and always starts at "descaling - abort"....

If anyone has any other ideas - I would be very grateful....

QUOTE (CoffeeMug @ Friday, 09 April 2021, 11:27 am)

Hello everyone! Through my striking Caffeo CI 970-101 I came across this great forum. I think it's really great that something like this exists. I've already scurried through all sorts of posts that sounded similar and tried a few tips. Our KVA is now about 5.5 years old and has about 15,000 coffees under its belt. The machine is tight and has always served delicious coffee up until now. The grinder is a little noisy now, but that's probably due to wear and tear. We have always cleaned and descaled the machine when it asked for it. We took the brew group out at least once a week and cleaned it with hot water. Then once a month I also cleaned it from the inside to remove all the powder and dried coffee grounds slush. Now to my problem: Yesterday it was time again and I cleaned the inside of the machine, dried everything and then ran the cleaning program, as usual, with two dissolved cleaning tablets in the water tank. Everything ran through flawlessly and there were also no special noises or similar abnormalities. After that I started the descaling program, for this I completely dissolved two teaspoons of citric acid in the tank with about 1 litre of hot water. Normally I use a sachet of descaler from the DM, but I didn't have it at the time. The program started normally, but after about 10 minutes I noticed that nothing was happening and I waited another 20 minutes and there was no progress at all - so I switched off the machine... When you switch it on it starts directly with "Descaling - Cancel" and the rotary flashes, when you press it comes "Descaling - Empty bowl and container", followed by "Descaling - Insert hose into spout and bowl" rotary flashes, after pressing the rotary comes "Descaling - fill water tank", as there is already water in it, it continues with "Descaling - rinse machine" and you hear the usual noises, it moves a little and the pump should actually start, but it doesn't - after about 30 seconds, it goes into "Descaling - fill water tank" mode. After about 30 seconds it goes into "System Start" mode and the Rotary control knob flashes. When you press it the flashing stops but starts again after about 30 seconds, the progress bar runs through to the end but nothing else happens. It seems that the machine is stuck in the "Descaling" program and does not move forward. I have already tried the following :- Resetting the machine via "On/Off + My Coffee" - Checked all cables in the machine for tightness- Checked all hoses for tightness and continuity- Opened and cleaned flowmeter- Left machine with filled water tank (descaler) overnight- 12 hours without power and without CR2032 insertedSince the machine has been in this state I can neither get forward nor back. It would be great if you have a tip. Many thanks Sascha

Hi,

You write cleaning tablets dissolved in the water tank. Are you sure or hope not that you have really done so.
Only the descaler goes into the water tank. The cleaning tablet is added via the powder chute.

Does the pump still make any noise? How did you check the voltage at the pump?

Hello Schlawi,

I actually dissolve two cleaning tablets in the tank in about 1 litre of warm water, takes about 20 minutes, then they are completely dissolved. I have been cleaning the machine this way for about 5 years and never had any problems with it until now.

I measured the voltage in parallel with an AC meter and it was over 77 volts the whole time.

The pump does not make any noise at the moment. Therefore, I have completely disassembled it and checked for possible damage. Mechanically the pump is in order, there were also no foreign bodies or deposits in the pump to find.

GreetingsSascha

It's the first time I've heard something like that. How far the tablets, think times coffee fat solvent for the pump is good I do not know. But as I said, they come normally in the powder shaft. Also stands in the BDA.

Why only 77V are present I can not say. Tip on power board. Possibly triac that controls the pump.
One would have to check just.

Thanks for the hint. I will look the days times, how I can test the pump and the Triac best.

Is there really no key combination to reset the program?


GreetingsSascha