Nescafe C70 - 6 Troubleshooting; Check List for Coffee Machine

Prodigio service manual Version 1.0 en
36
TROUBLESHOOTING
6 TROUBLESHOOTING
6.1 Check list for coffee machine
After an initial inspec-
tion in accordance
with this check list, errors
are quickly found and cor-
rected with the appropriate
measure.
Therefore, adhere to the
sequence of the check list.
Repair every occurring error
and work the check list
through until it is completed.
Check Error symptoms
Measure /
repair work
Further measures /
repair work
1 Check the coffee
machine for visi-
ble damage
1.1 Housing parts bro-
ken or damaged
YES - replace housing parts if
necessary
NO - continue
1.2 Power cord dam-
aged
YES - replace power cord
NO - connect power cord of
machine to the mains and con-
tinue
2 Check mechani-
cal components
2.1 Cup support with
capsule container
and drip tray does
not remain in fitting
position
YES - check if drip tray has its
metallic plate for magnetic
mounting
NO - continue
NO - replace drip tray
2.2 Slider malfunction
YES - slider does not close or
open properly
NO - continue
YES - empty the capsule con-
tainer
YES - check that no capsule is
blocked inside the machine
NO - replace slider unit
2.3 Capsule is not
ejected correctly
YES - replace brewing unit
NO - continue
3 Fill water tank 3.1 Water tank leaks
YES - replace water tank
NO - continue
4 Plug in machine to
perform auto-
matic self test
4.1 Coffee machine is
not working
(does not function)
a) YES - power cord is okay
(loose connection)
YES - continue
NO - replace power cord
b) YES - pump works (press a
coffee button)
YES - continue with point d)
NO - continue with point c)
c) YES - all three coffee but-
tons are working
YES - replace pump
NO - replace electronic device
(main PCB) and/or touch pad
PCB (MMI PCB).
d) YES - fine wire fuses or triac
on thermoblock defective
YES - replace thermoblock
NO - continue
e) YES - wiring is okay
NO - continue with point 4.2
YES - replace main PCB (see
page 59)
NO - replace defective cables
4.2 Maintenance light
(orange) is blinking
with 2 Hz
YES - thermoblock is hot
NO - self test ok - continue with
point 4.3
YES - check / replace MMI
PCB (see page 49) and main
PCB (see page 59)
NO - replace thermoblock,
check / replace MMI PCB and
main PCB
4.3 Maintenance light
(orange) perma-
nently lit
YES - capsule container full or
capsule ejection chute blocked
NO - continue
YES - empty capsule container
or remove obstacle
NO - clean lenses of light bar-
rier (see page 34)