La San Marco 100 Series, Использование и обслуживание

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45
English
PROBlEM CAUsE sOlUTiOn
4.
• There is no water
flowing from a serving
unit.
• Coffee ground too fine or
excessive quantity for type of
filter used.
• Clogged water circuit.
• Defective solenoid.
• Adjust the grinding coarseness and/
or the quantity of ground coffee.
• Check that the injector, the upper
circulation pipe, the valve (flow
variator) of the group, the water
dispenser and the solenoid valve of
the group are not clogged.
• In the machines with electronic
metering, check the displacement
meter and its valves.
• Check the solenoid of the unit, its
wiring and the fuse in the electronic
control unit.
5.
• The programmed
servings of espresso
coffee are not constant
or vary on the different
units.
• Abnormal operation of the
electronic control unit or of the
displacement counters.
• Leak from serving unit
solenoid valve.
• Water dispensers clogged.
• Program the serving quantities
separately on each serving unit. If
the problem persists, replace the
displacement meter of the serving
unit affected.
• Replace the solenoid valve of the
serving group.
• Check the water dispenser.
6.
• It is not possible to
program the serving
quantities on unit 1 and
to copy them on the
other units.
• Abnormal operation or
defective displacement meter
of unit 1.
• Check the control unit-displacement
meters electrical wiring.
• Replace the displacement meter.
7.
• Displacement meters
alarm.
• Displacement meters jammed
or defective.
• Defective wiring.
• Replace the volumetric counter.
• Check the wiring and its
connections, the control unit and the
fuses.
8.
• Autolevel alarm. • Water circuit of automatic
level without water.
• Main water supply valve
closed.
• Faulty autolevel solenoid.
• Check the hydraulic circuit of the
autolevel.
• Check if the on-off valve on the
water supply is open.
• Replace the autolevel solenoid.
9.
• Overfill alarm • Malfunction in automatic level
circuit.
• Leak in button for manual
water filling.
• Leak in heat exchangers.
• Check the hydraulic circuit of the
autolevel.
10. • The machine is switched
on (the main switch is in
position 1 or 2 and the
signal light is lit) but the
electronic control is out
of order.
• The electric wiring of the
electronic control unit is
defective.
• The electronic control unit is
defective.
• Check the electrical wiring, the
electronic control unit and its
components.
• Replace the electronic control unit.
11. • The machine feeds
water from one serving
unit although the serving
has not been selected.
• Solenoid and/or pump fed
continuously.
• Control unit relay powered
continuously.
• Replace the electronic control unit.
12. • 105 S models one
unit serves water
continuously.
• Electric circuit of unit
improperly connected.
• Check the connection and correct it
(see wiring diagram).
13. • The steamer discharges
only small quantities of
steam or water droplets.
• Tap needs adjustment.
• Worn gasket on tap. • Adjust tap.
• Replace the gasket.