Nespresso Gran Maestria EF 287, Service Manual

Page: 37 / 162

Maestria / Gran Maestria service manual
37
T R O U B L E S H O O T I N G
6.2 Check list for Gran Maestria coffee machine
After an initial inspec-
tion in accordance
with this check list,
errors are quickly found and
corrected with the appropri-
ate 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
incomplete?
YES - replace housing parts
NO - continue
1.2 Housing parts bro-
ken or damaged?
YES - replace housing parts if
necessary
NO - continue
1.3 Power cord dam-
aged?
YES - replace power cord
NO - connect coffee machine
to the mains and continue
2 Check mechani-
cal components
2.1 Capsule container
cannot be locked in
place?
YES - check capsule container
and seat
NO - continue Replace damaged parts
2.2 Drip tray cannot be
locked in place?
YES - check drip tray with
metal cover
NO - continue Replace damaged parts
2.3 Cup support cannot
be tilted up, does
not engage or rat-
tles?
YES - check cup support and
mounting
NO - continue Replace damaged parts
2.4 Lever cannot be
operated correctly?
YES
- check brewing unit
- check lever brake
(on brewing unit)
- check if rubber buffer is
missing
NO - continue Replace damaged or missing
parts
2.5 Lever makes unu-
sual noises
YES - check brewing unit
NO - continue Replace damaged parts
3 Fill water tank 3.1 Water tank leaks
YES - replace water tank
NO - continue
4 Switch on coffee
machine with ON/
OFF button
4.1 Coffee machine
does not work (no
function at all)?
YES
- check power cord and
terminal block
- check ON/OFF button
- check electronics
NO - continue Replace damaged parts
4.2 White LEDs do not
light capsule con-
tainer?
YES
- check electronics
- check light guides
NO - continue Replace damaged parts
4.3 Coffee machine
does not get ready
but stays in error
mode
4.3.1 One or both ther-
moblocks stay cold? YES
- check wiring
- check thermo fuses
- check thermoblock(s)
- check temperature sensor(s)
- check electronics
NO - continue
4.3.2 One or both ther-
moblocks get hot? YES
- check electronics
- check temperature sensor(s)
- check thermoblock(s)
NO - continue
4.3.3 One or more of the three
LEDs at the front side do not
light steadily green? YES
- check push/turn control
module(s)
- check electronics
NO - continue