Nespresso Maestria EF 285 Service Manual page 38

38
T R O U B L E S H O O T I N G
Check Error symptoms
5.1 Cup heater mal-
function:
• number of pressed
rips (micro switches)
• no water
• only cold water etc.
5 Test function of
pumps
5.2 Set dial of Lungo
push/turn control to
position 5 and
press Lungo but-
ton.
No water flows out
of coffee outlet.
6.1 Coffee capsule
cannot be inserted
in brewing unit?
6.2 Lever cannot be
closed correctly?
6 Test coffee prepa-
ration (set dials of
6.3 Coffee capsule not
Espresso and
perforated?
Lungo push/turn
controls to posi-
6.4 Coffee flows in cap-
tion 3 each)
sule container and
drip tray?
6.5 Coffee temperature
too low (below
83 °C)?
Maestria / Gran Maestria service manual
Measure /
repair work
5.1.1 Cup heater (pump) starts
if only one or two rips are
pressed?
5.1.2 Pump for hot water does
not start?
5.1.3 Pump starts but there is
no water flow?
5.1.4 Pump starts but there is
only cold water flow?
5.2.1 Pump for coffee does not
start?
5.2.2 Pump for coffee starts?
YES - check brewing unit
NO - continue
YES
- check lever
- check brewing unit
NO - start coffee preparation
YES
- check brewing unit
- check pump pressure
NO - continue
YES - check brewing unit
NO - continue
YES
- check flow meter
- check temperature sensor
- check electronics
NO - continue
Further measures /
repair work
YES - check rips / micro
switches
NO - continue
YES
- check rips / micro switches
- check pump
- check electronics
NO - continue
YES
- check water tank (water tank
valve)
- check water tank connector
- check tubing for leaks or
clogging
- check pump (for hot water)
- check if thermoblock (for hot
water) is calcified
NO - continue
YES
- check thermo fuses on
thermoblock for hot water
- check electronics
NO - continue
YES
- check thermal cut-out (limitor)
on pump
- check Lungo push/turn
control module
- check wiring
- check electronics
NO - continue
YES
- check tubing for leaks or
clogging
- check pump
- check flow meter
- check if thermoblock for
coffee is calcified
- check brewing unit and its
check valve
Continue
Replace damaged parts
Replace damaged parts
Replace damaged parts.
Check pump.
Clean or replace flow meter.
Replace damaged parts.