What error 5 mean on impressa j9 mean?

Here is the replacement tray

Jura J9.2-J9.3-J9.4-J90-J95 Drip Tray - Espresso-parts.com

https://www.espresso-parts.com > Jura-J9-2-J9-3-J9-4-J...

The J9.2-J9.3-J9.4-J90-J95 Drip Tray catches excess water/coffee while the machine is operating. When the Drip Tray fills to its max capacity, ...
US$89.97 · ‎In stock

https://www.caffe-select.co.uk/pages/jura-user-guides-manuals

https://www.youtube.com/watch?v=PE-PN3tdSAI
Instruction manual
https://www.eirvik.is/media/4260/impressa-j93-one-touch-tft.pdf

have you checked pipes for a blocked filter?

Plain old vinegar.

Error 5 is pointing to heating problem. Here are the parts that may be malfunctioning:
1- Thermal sensor not registering heating. Replace it.
2- Heater not heating up. Check continuity on heating element. If there is no continuity, (This is rare). Replace heater (Thermo block).
The problem can be linked to:
1- Missed descaling of machine for extended period.
2- Use of automatic descaling method suggested by Jura. Descale the machine every three months using Manual descaling method.. 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

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 dirty!.

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!!

put in microwave , use hot boiling water , descale .

Error 6 means that the automatic ceramic valve having a problem reaching the right position. This is usually related to the main electronic board and there is a chance that this needs to be changed. There could be a possibility that the multivalve is broken, but if you can hear it turning when you start up the machine, it`s probably ok. Contact your dealer for service, or call Jura hotline for your local servicecenter; +41 062 389 82 33

We have just done a full disassembly, cleaning, and relube of our Jura Z5 Impressa unit. Here are the full details of the RainyDayProject:

http://www.rainydaymagazine.com/RDM2009/Home/October/Week4/RDMHomeOct2009.htm#JuraZ5BrewUnitCleaning

Click on any of the images for larger version.

Sincerely,
RainyDayInterns