15
Service Manual EF 473 / EF 474 enVersion 1.0
Troubleshooting
Checking the machine on receipt
The receipt check enables you to rapidly
locate faults on the machine and to initiate
appropriate repair action.
Follow the check procedure.
Repair any faults found and check if the
machine is operating perfectly.
Check procedure Symptoms Action / repair work Further action / repair work
1 Check appliance for visible
damage
1.1 Parts of housing broken or damaged
YES - Replace parts if necessary
NO - Go to point 1.2
1.2 Mains cable damaged
YES - Replace mains cable
NO - Plug machine to the mains and go to point 2.1
2 Check mechanical elements
2.1 Closing handle works correctly
YES - Go to point 2.2
NO - It is hard or impossible to close the closing handle
YES - Screw on new closing handle screws at
defined torque (see page 22) or replace CBU
NO - Replace the CBU
2.2 Is the capsule correctly ejected?
YES - Go to point 2.3
NO - Replace CBU
2.3 Is the capsule cage seal damaged?
(feel with a finger if the seal is damaged)
YES - Replace CBU
NO - Go to point 3
3 Fill water tank 3.1 Water tank is leaking
YES - Replace water tank
NO - Go to point 4
4 Turn-on On/Off switch 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 - b) Check if On/Off switch is functional
YES - Go to point c)
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 buttons are functional
YES - Go to point e)
NO - Replace defective button(s)
YES - e) Check if pump's fine wire fuse (128°C) is
defective
YES - Replace it
NO - Replace pump
YES - f) Check if thermoblock’s fine wire fuse (167°C)
is defective
YES - Replace it together with electronic control
board and if necessary with the thermoblock
NO - Go to point g)
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