When I select the quantity of water trough the key for ex.100ml the computer screen show 100ml butr each time only 30ml going out
SOURCE: Jura impressa E75.message mafunction 8 shows up
Malfunction 8 is related to the brew unit typically. It is usually an indication of the brew unit motor having to work too hard to move the brew unit up and down. This is usually cured by disassembling, cleaning, replacing any o'rings that may be bad, and lubricating the unit, then reassembly.
I have had to do this twice on an an E75 and an E8. I finally broke down and bought seal kits and lubricant for doing this. One could by a new brew unit off of e-bay and change out the whole thing. But a simple rebuild will typically suffice.
Mike
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