Nespresso Essenza D99 - Functionality Check

18
Troubleshooting
Service Manual EF 347 / EF 348 enVersion 1.0
4 Press any button to start coffee
machine to perform automatic self
test
4.1 Machine is not working (no function)
YES - a) Check if mains cable is functional
YES - Go to point b)
NO - Replace it
YES - c) Check if pump is working (press coffee
button)
YES - Go to point f)
NO - Go to point d)
YES - d) Check if coffee button is functional
YES - Go to point e)
NO - Replace it
YES - e) Check if pump's thermal fuse (128°C) is
defective
YES - Replace pump (see page 24)
NO - Go to point f)
YES - f) Check if thermoblock’s thermal fuse (167°C)
is defective
YES - Replace thermal fuse and if necessary
thermoblock too (see page 23)
NO - Go to point g)
YES - g) Check if electrical wires are functional
YES - Replace elect. mainboard and the NTC
(see page 25)
NO - Replace defective(s) wire(s)
NO - Go to point 4.2
4.2 Backlighted coffee button blinks at irregular
intervals
YES - Check if thermoblock heating element is func-
tional
YES - Replace NTC (see page 22)
NO - Replace thermoblock (see page 23)
NO - Self test ok. Go to point 5
5 Check coffee temperature while
preparing a coffee (see page 34)
5.1 No coffee at outlet
YES - a) Water system is empty
YES - Fill water system (see page 11)
NO - Go to point b)
YES - b) Pyramid plate is clogged
YES - Replace TCBU (see page 26)
NO - Go to point c)
YES - c) Machine is blocked by scale YES - Descale machine (see page 40)
NO - Go to point 5.2
5.2 Temperature is too low (less than 83°C)
YES - Descale the machine (see page 40)
NO - Go to point 5.3
5.3 Temperature is too high (more than 89°C)
YES - Change NTC (see page 22)
NO - Go to point 6
Check procedure Symptoms Action / repair work Further action / repair work