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Jura manuals & Error Codes

Very often minor issues or problems can be rectified by checking through the manual - so in the first instance try the following link which will take you to jura's website page on which you can select the model of Jura machine you have and download the appropriate Jura user manual in pdf to allow you to check for the correct operation.

Jura Coffee machine manuals

 

Once you have checked the manual and are familiar with the correct operation, we have provided below a selection of frequent issues that we have come across over the last 10 years and which may help to get you going again or at least to know what sort of problem you are dealing with.

Common problems and possible remedies.

Jura Error codes

Jura Error codes 1 to 5:  the most frequent being Jura Error 2 and Jura Error 4 - and refer to the Jura Thermobloc (water heater units) and temperature systems and will indicate that the Jura machines logic board is receiving a signal  that is outside tolerance values - in other words either the sensor has failed and is not sending a signal or an incorrect signal OR the thermobloc is not heating, this is often because the thermal fused cords which supply the thermobloc with its power are designed to "blow" cutting power if the thermobloc gets too hot as a safety precaution.

This in turn can often be caused by a failed sensor allowing the thermobloc to overheat.

In all Error code cases the first thing to do is disconnect the power from your Jura and allow the machine a few minutes before reconnecting the power - this will confirm if it is a hard fault or just a glitch - sometimes if the machine has been exposed to low temperatures, for example, it can take a while for the thermblocs to heat up and your Jura can see this as a fault (it has a time limit in which to heat the thermobloc to correct temp - starting again will often clear the issue if there is no actual damage )

If the above is unsuccessful, it is likely we will need to open your Jura and change some parts - usually the sensor for the appropriate thermobloc (some Jura models like the Jura z5 and Jura Z7 have two) and the fused cords - because if the sensor has failed it is likely to have overheated the cords to a point where they are weakened and if the fused cords have blown then is is likely that was because the sensor allowed the thermobloc to overheat.

On rare occasions the power board which switches on and off power to the thermbock can have a fault which stops it from cutting power to the thermobloc when temperature is reached causing the same symptoms - and this would need a new board, as once the damaged sensor and fused cords have been replaced they will be blown again.

 

Jura Error 6 - this is the electronic ceramic valve, seen on Jura Z5, Jura X5, the Jura J9, J5 and J6 and the Jura Z6,Z8 and Z9 machines and several other units. This valve has a motor which can often be heard whirring at start up and it is responsible for directing water and steam to different outlets and dumping waste steam pressure to the condenser block. This error indicates that the electronic ceramic valve is not operating correctly, it can be jammed with scale, it can be leaking or have water leaking onto it causing the circuits to short out or it could just be failed.

Jura Error 8 - this is a frequent issue on Jura coffee machines, mainly because it refers to the Jura Brew unit which as you can imagine is the heart of the machine in constant operation making the coffee. 

The causes of error 8 on the Jura coffee machines are often instantly diagnosed as brew unit failure - however in our 10 years working on Jura coffee machines, We have established that the cause of the Error 8  can be any or several of a number of components.

For Error 8 to be displayed, your Jura is saying that as far as its sensors are aware, the brew unit has failed to move correctly through its cycle, this can be the obvious tired and stiff brew unit, it can be the drive encoder failing to give the correct information to the logic board. If a loud grinding noise precedes the error 8 then the brewer drive motor is likely to have fractured one of its mountings and if a series of loud clicks but no real movement of the brewer precedes the Error 8 then the transformer is probably failing under load and requires replacement, there is still another possibility with the error 8 and that is that the relay on the power distribution board is sticking and not engaging power to the brewer motor.

Jura System Messages

"Fill System" message - this is given when your Jura machine does not register any or enough water passing the flow meter - first check as a user, is the water tank - Is the black magnetic float in the water tank free and able to move up and down (this will more often give the message "fill water tank" - then under the tank  on the tank itself, is a small circular valve which can be pushed up (when over a sink ideally) to release water - a good flow of water should escape when doing this. If you have a filter in the water tank, try removing it temporarily, as some filters have been know to block flow from new!

The flow meter may have some sticky debris in from sludge in the tank that can accumulate if not cleaned out regularly - It may help to put hot (not boiling) water in the tank and press rinse a few times, as this can get the flow meter moving again.

Is any water coming out of the front of your jura machine? or into the tray? when rinse is pressed? If nothing gets through it is very likely blocked inside with scale, and may need to be disassembled to locate the blockage and successfully clear it - sometimes just running a strong solution of 6 Jura descale tablets in 500ml of warm water in the tank and pressing rinse will remove the blockage, but be aware that it could create a leak from elsewhere in the fluid system due to the pressure required to shift the blockage - also there is quite a distance of pipe from the tank to the likely blockage and to get the descale solution to the point where it is required would require that water to be pushed through, which the blockage is stopping, so it would be necessary to disconnect the pipework as close to the blockage as possible and pump the solution through, or in some cases replace the blocked component altogether.

"Fill Beans"

Apart from the obvious empty bean container, a Jura coffee machine displaying the message "fill beans" when the bean hopper is full is indicative that insufficient coffee powder has reached the brew unit. This can be either because of a powder blockage, if you can hear the grinder operating before the brew unit cycles and then says "fill beans" it is possible that the output of the grinder is blocked with fine powder, you may be able to clear this with a vacuum cleaner, but it may need proper dismantling to remove all the obstruction and clean and recalibrate the grinder blades. If you cannot hear the grinder operate before the brewer cycle, it is most likely that the grinder motor has failed or burnt out, or the power pcb that feeds it has blown. Cafe Select carry  new Jura Grinder units on board for most models, power boards are harder to diagnose remotely and if needed when visiting site, we would order a new one and remove to the workshop for fitting, returning the machine to site upon completion, there is no extra charge for the revisit, only the cost of parts as necessary.

 "Empty Tray"

If your Jura coffee machine is giving the message "empty tray" and you have just emptied the tray, there are a few things you can check - the machines that have metal tray contacts on the back of the drip tray need to have ALL dirt, water or coffee oil cleaned from between the two contacts, as any residue can become moist and will conduct the current between the two metal plates giving the "empty tray" message. If you have been running a lot of hot water or steam directly into the tray, it is possible for the internal contacts to become damp and this may take 24hrs to dry out - IF you turn on the machine and the message is gone, but shortly after a rinse or coffee the message re-appears? then it is very possible that  there is a leak inside which is finding its way down to the internal contacts, this would be more likely on Jura X9 / Jura X7 models, as on Jura Z, Jura J series and Jura Giga machines leaking onto the tray contacts is not possible due to the layout of the machine internals.

It is worth noting that Jura Z series, Jura J series, Jura Ena and Jura Giga machines have a microswitch located just above the waste bin at the front of the machine which tells the machine when the waste bin support is in place - this microswitch can get coffee residue on it and stick in the closed position, fooling the machine into thinking that the tray is still there and as a consequence not acknowledging that the tray has been removed for emptying in the course of a clean or de-scale.