La San Marco 20/20 CLASSIC Series, Использование и обслуживание

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48
ENGLISH
DEFECT CAUSE SOLUTION
9. Autolevel alarm.
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water circuit.
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is closed.
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valve is defective.
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valve is open.
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must inspect the automatic level
water circuit and check the operation
of the solenoid, and replace it if
necessary.
10. Overfill alarm. t$JSDVJUBVUPNBUJDMFWFM
malfunction, the filling solenoid
is always open.
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faulty.
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must check the correct operation of
the filling solenoid, the electronics
controlling the automatic level and
any faults in the manual filling valve.
11. The machine is on (main
switch in position 1 or
2 and the indicator light
is on) but the electronic
control is out of service.
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electronic board or touch panel
is defective.
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panel are defective.
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must check the electrical wiring
of the electronic board and touch
panel. Check the operation of the
electronic board and touch panel and
replace any defective components if
necessary.
12. The machine delivers
water from a brewing
group even if no coffee
dose buttons have been
selected.
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and/or pump are powered
continuously.
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must check the electronic board and
the touch panel. Check the operation
of the electronic board and touch
panel and replace any defective
components if necessary.
13. The steam wand drips
slightly, even when in the
closed position.
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adjusted.
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must check the gasket and replace if
necessary or adjust the steam valve.
14. The hot water spout
drips slightly, even if in
the closed position.
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adjusted.
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must check the gasket and replace
if necessary, or adjust the hot water
valve.
15. The unit whistles after
brewing a coffee.
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if necessary. Calibrate the valve to 12
bar.
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must check the pump operating
pressure. Calibrate the pump to 9 bar.