this is a diagram of the drip tray & drip tray contacts for the Jura S-Series S Series Impressa S7, S7 Avantgarde, S8, S9, S9 Avantgarde, S90, S95, C3000 capresso 153, X70, X90, and XS90 One Touch Models.
the GREEN arrow indicates a thin black plastic finger-like protrusion. this finger (when the tray is inserted) will press against the "TRAY MISSING" small white relay switch deep inside the machine. use a flashlight to visualize the small switch. verify that the switch is securely mounted and clicks when depressed (up) using a soft tool (bamboo skewer) and note the sound. verify the finger is not damaged or chipped off. listen for the sound very carefully when the tray is fully inserted into the machine. if it is not these preliminary factors, the relay switch should be replaced.
"EMPTY TRAY" or "EMPTY GROUNDS" (on other machines) is activated when the 2 metal contacts can complete an low volt electrical circuit through water or wet caked-on coffee grounds. the area is marked in RED. careful examine this area and observe the obstruction and gunk and compare with bare clean black abs plastic. the gunk is dull and rough. use soft tools (toothpick, bamboo skewer) to scratch through the gunk. use warm water and soap and a low bristle height brush to thoroughly remove all buildup from this area. dry the metal contact and contacts area with a high percentage alcohol. visualize the insertion slots deep inside the machine (for the metal contacts marked 414) with a flashlight and verify that the female contact point pads have not been bent and are separate and distinct.
Hi all, I have the exactly same problem on my Gaggenau CM470 however the drip tray is clean and the contacts in the back is also 100% clean.. I wonder if its possible to disable the sensor/switch on a CM470 ?
@Derekns74 How do you remove the switch? My C3000 also reads "EMPTY TRAY" constantly, even if the tray is empty and clean. It does not display the "EMPTY GROUNDS" error only "EMPTY TRAY"
If I remove the tray it display "TRAY MISSING" but whenever I insert the tray again, it reads "EMPTY TRAY"
On one occasion when our power went out, it fixed the machine, so that it stopped reading "EMPTY TRAY," but after a day or two it stopped working and displayed the same EMPTY TRAY error message again.
SOURCE: Tray empty message
If the machine says TRAY MISSING it's the contacts at the back so clean as other people have stated, you can also use a cardboard nail file to clean the contacts at the back if there really skanky!.
If the machine keeps saying EMPTY GROUNDS even though you have, pull out the tray, look just inside the aparture where the tray goes top right at the front there is a small slot where if you look closely you can see a small white micro switch. This will be probably gunged up with coffee and the switch will be stuck up, get a can of WD40 and squirt a small amount up into the switch then poke the switch with a small screwdriver up and down until it moves smoothly.
Then replace all the bits, sit down, look smug and have a coffee cos you've fixed it!! :0)
SOURCE: Reads "empty tray". Tray
The tray may have some redidual soiling around the electrical contacts at the back.
Try cleaning the contacts and see what happens.
SOURCE: Message says tray missing, even
Clearly, the drip tray is not aligned right, or there is a manufacturing flaw. Simple answer would be to examine the part of the tray that you believe is supposed to engage the switch when it is in place, and try to figure out why it is not doing this.
Personally, if you are like me and don't mind voiding a warranty, I'd suggest removing the switch so the machine always thinks the tray is in place.
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