Troubleshooting; Checking The Machine On Receipt - Nespresso Essenza C91 Service Manual

Troubleshooting
Checking the machine on receipt
The receipt check enables you to rapidly
locate faults on the machine and to initiate
Check procedure
1.1 Parts of housing broken or damaged
1 Check appliance for visible
damage
1.2 Mains cable damaged
2.1 Closing handle works correctly
2 Check mechanical elements
2.2 Is the capsule correctly ejected?
3 Fill water tank 3.1 Water tank is leaking
4 Press On/Off button to perform
4.1 Machine is not working (no function)
automatic self test
Service Manual C91 / D91
appropriate repair action.
Follow the check procedure.
Symptoms
YES ­ Replace parts if necessary
NO ­ Go to point 1.2
YES ­ Replace mains cable
NO ­ Plug machine to the mains and go to point 2.1
YES ­ Go to point 2.2
NO ­ It is hard or impossible to close the closing handle
YES ­ Go to point 3
NO ­ Replace TCBU
YES ­ Replace water tank
NO ­ Go to point 4
YES ­ a) Check if mains cable is functional
YES ­ b) Check if On/Off button is functional
YES ­ c) Check if pump is working (press coffee
button)
YES ­ d) Check if coffee button is functional
YES ­ e) Check if pump's thermal fuse (128°C) is
defective
YES ­ f) Check if thermoblock's thermal fuse (167°C)
is defective
YES ­ g) Check if electrical wires are functional
NO ­ Go to point 4.2
14
Repair any faults found and check if the
machine is operating perfectly.
Action / repair work
YES ­ Screw on closing handle screws at defined
torque or replace CBU (see page 22)
NO ­ Replace the CBU
YES ­ Go to point b)
NO ­ Replace it
YES ­ Go to point c)
NO ­ Replace it
YES ­ Go to point f)
NO ­ Go to point d)
YES ­ Go to point e)
NO ­ Replace it
YES ­ Replace pump (see page 20)
NO ­ Go to point f)
YES ­ Replace thermal fuse and if necessary
thermoblock too (see page 19)
NO ­ Go to point g)
YES ­ Replace electronic mainboard (see page
21)
NO ­ Replace defective(s) wire(s)
Further action / repair work
Version 1.0 en