Insert the tray-all of it except the grounds container. The message disappears and you can wait until the machine continues it's cycle and then asks to empty the tray. Empty the tray and place the grounds container back inside. Whew, I've done this a few times over the years when I am rushing but it fixes it every time.
Put the tray back without the grounds container (b/c it is higher; that's what can't get past the flap). Make a cup of coffee, letting the grounds fall into the tray. Normally, after you do that, the machine will stop in the correct position. You can remove and clean the tray, and put the full assembly back in.
I've had to do this a couple of times and it has always worked.
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the basic solution is to clean the contacts at the back of the drip tray, they can easily become soiled. assuming you have done this the contact points in the coffee machine may also need cleaning. this can be done by gently rubbing fine sand paper on the contact where the drip tray contact are inserted. if problem still persists then the internal contacts may need replacing.
The "sensor" is most likely a micro-switch. When the tray is in it actuates the switch and closes a circuit indicating to the controller that the tray is in place. Sorry to tell you this but it will have to be disassembled to replace the switch if it has failed as the micro-switches are usually sealed items that are not normally cleaned.
For Jura F7 Series, "Tray Missing, can't put it back in". With a small flashlight, look in to the cavity which the tray and grounds container reside in. Along the right side above a slot to the end, you'll see a white micro switch. with a "Tooth Pick" simply press the switch inward (to the right) and hold till the machine cycles the Levcer / Flap up and out of the way.! Put your tray and grounds container back in and begin brewing!! -dh
We had this error when it asked is to remove the tray during the cleaning cycle. The fix was to just finish the cleaning cycle without the tray in and at the end the flap was back in place and we could fit the tray in again.
Dredge drawer is the big box on the bottom right. That is where the grounds are dumped. Remove the drip tray and pull the drawer out about half way. Push it back in with 1 finger on the right side of the drawer. That should clear the message. If it comes back on when you put in the drip tray, there is a section of the drip tray that can be removed to stop that. On the right side of the drip tray is a notch. Inside that notch is a thin piece of plastic. It curls up on the right side. Cut out the piece that curls up (just the piece that curls, about an inch). When you push in the drip tray that curl lifts the dredge drawer and knocks it out of position. There is a micro switch whit an arm the hangs down in the slot on the side of the machine. Make sure that you have the arm for the micro switch.
The machine did not complete its cycle, either while finishing a brewing cycle or a cleaning cycle. This is caused because the motor is not strong enough and overheated. I think it is a design problem, but there is a "work-around" solution.
First, to put basket back, look inside opening. You will see a flap at the back of the opening. This flap is down and is what is preventing insertion of basket. Take only the grounds basket. Tilt the grounds basket and insert it so the back end of basket goes under the flap. Then level out the basket. Note the flap is now inside the back end of the grounds basket. Holding the basket up and level, re-insert the drip tray and the basket holder underneath the basket. These should now slip into place.
The "work-around" solution is to let the motor cool down. Unplug the machine for at least 30 minutes, then turn unit back on, and the cycle should complete because the motor is now cool.
I notice this error 8 happens mainly when the voltage from the Hydro Utility is low. This happens during peak electricity usage hours. So, to clean your machine, do it on the week-end during the daytime either mid-morning or mid-afternoon.
Start up the machine, take insert everything but the used grounds container. The machine will reposition the brew unit. When the machine says "heating", take out the tray and now you can insert everthing with the used grounds container. You can of course run a Rinse cycle if the machine doesn`t start positioning right away.