Nespresso Gran Maestria EF 287, Руководство по обслуживанию

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Maestria / Gran Maestria service manual
35
T R O U B L E S H O O T I N G
4 Switch on coffee
machine with ON/
OFF button (con-
tinued)
4.3 Coffee machine
does not get ready
but stays in error
mode (continued)
One or both LEDs above
Espresso and Lungo push/turn
controls do not light up green? YES
- check Espresso / Lungo
push/turn control modules
- check electronics
NO - continue
5 Turn steam lever
to position ON
(check steam cir-
cuit)
5.1 Middle LED for
steam nozzle does
not blink white?
YES
- check micro switches at
steam valve
- check electronics
NO - continue Replace damaged parts
5.2 Middle LED for
steam nozzle does
not light white but
continues blinking?
YES
- check wiring
- check temperature sensor
(on thermoblock for steam)
- check thermo fuses
(on thermoblock for steam)
- check thermoblock for steam
- check electronics
NO - continue Replace damaged parts
6 Test function of
pumps
6.1 Steam handle is in
"steam" position.
No steam flows out
of steam pipe.
6.1.1 Pump does not start?
YES
- check micro switches on
steam valve
- check pump (steam circuit)
- check electronics
NO - continue
6.1.2 Pump starts?
YES
- check water tank, water tank
valve and connector
- check tubing for leaks or
clogging
- check steam pipe
- check pump (steam circuit)
- check if thermoblock for
steam is calcified
- check if steam valve is
calcified
Continue
6.2 Set dial of Lungo
push/turn control to
position 5 and
press Lungo but-
ton.
No water flows out
of coffee outlet.
6.2.1 Pump does not start?
YES
- check thermal cut-out (limitor)
on pump
- check Lungo push/turn
control module
- check wiring
- check electronics
NO - continue
6.2.2 Pump starts?
YES
- check tubing for leaks or
clogging
- check pump
(water circuit)
- check flow meter
- check if thermoblock for
coffee is calcified
- check brewing unit and its
check valve
Continue
Check Error symptoms
Measure /
repair work
Further measures /
repair work