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TECHNICIANS manual
10.3
Maintenance
10.3.1 Scheduled maintenance
Perform routine maintenance as reported in the table
below.
In case of intensive use of the machine the checks
need to be performed in smaller intervals. The following
pages list the required operations.
Component
Type of intervention
Quarterly
Yearly
PRESSURE TRANSDUCER
•
Keeep the boiler pressure between 0.8 and 1.4 bar.
•
Periodically check water pressure during coffee dispensing: check the pressure indicated on
the display, which must be between 8 and 9 bar inclusive.
X
FILTERS and PORTAFILTERS
Check the condition of the filters. Check for any damage on the edge of the filters and check
whether any coffee grounds settle in the coffee cup and replace filters and/or filter holders,
as required.
X
DISPENSING GROUP
Replace the perforated disk and under cup seal, as indicated in par. "10.3.4 Dispensing group
maintenance" on page 50 .
X
WATER FILTER
Replace the water filter cartridge at the frequency indicated by the manufacturer.
The presence of scale in the hydraulic system indicates the need for its replacement.
X
WATER SOFTENER
Carry out the regeneration as indicated by the manufacturer.
Use care in areas where the water is very hard. It will be necessary to regenerate at more
frequent intervals, especially in case of intensive use of the machine.
X
GRINDER-DISPENSER
•
Check the ground coffee dose (about 7 grams per time); check the degree of grinding. The
grinders must always have sharp cutting edges. Their deterioration is indicated by the pres-
ence of too much powder in the grounds.
•
You should replace the flat grinders after every 400/500 kg of coffee. For conical grinders,
replace every 800/900 kg.
•
If the automatic wear warning of the grinders is enabled, follow the guidelines in par."8.3
Maintenance report" on page 30 .
X
BOILER
Replace the water in the boiler as indicated in par. "6.6 Water replacement" on page 26 .
X
BOILER
•
Replace the heating element in case of failure or malfunctioning.
•
Do not replace the heating element with a more powerful one. Before making any modifica-
tions, contact the Manufacturer.
•
If the thermostat of the heating element is triggered, reset it by pressing the central button
of the thermostat. However, before trying to operate the machine, verify the causes of the
problem.
•
If the boiler insulation needs to be removed, restore the insulation after maintenance
•
Remove and clean the boiler level probes.
•
Verify the presence of lime scale deposits on the heating element.
•
A strong presence of limestone indicates that the water filter has not been replaced, or that
the softener has not been regenerated.
•
When replacing any components, always replace the relative gasket as well.
X
SAFETY VALVE
SCNR VALVE
Check that the safety valves and non-return drain valves are operating properly, as indicated
in par. 10.3.5 on page 50 and 10.3.6 on page 50.
If their replacement becomes necessary due to failure, repeat the check with the new valve
installed.
X
HYDRAULIC CIRCUIT
•
Verify the presence of lime scale deposits in the hydraulic circuit.
•
When replacing any components, always replace the relative gasket as well.
•
A strong presence of limestone in the hydraulic circuit of the machine indicates that the
water filter has not been replaced, or that the softener has not been regenerated.
•
Use care in areas where the water is very hard. It will be necessary to replace the water filter
more frequently, or regenerate the softener at more frequent intervals, especially in case of
intensive use of the machine.
X
