Checks And Maintenance; Suggestions On How To Obtain A Good Cup Of Coffe - CMA MARISA Bedienungsanleitung Für Den Benutzer

17. Checks and Maintenance

Maintenance must be carried out in order to ensure perfect safety and efficiency of the machine over time. In
particular, it is advisable to ask the Technical Service to carry out an overall check of the machine at least once a year.
GAUGE
Keeep the boiler pressure between 0.8 and 1.4 bar.
GAUGE
Periodically check water pressure during coffee delivery: check the pressure indicated
on the gauge, which must be between 8 and 9 bar inclusive.
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.
GRINDER-DOSER
Check the dose of ground coffee (between 6 and 7 gr. per stroke) and check the degree
of grinding. The grinders must always have sharp cutting edges. Their deterioration is
indicated by the presence 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.
SOFTENER
The build-up of lime scale deposits in the hydraulic circuit of the machine indicates
that regeneration has been neglected. Use care in areas where the water is very hard.
It will be necessary to regenerate at more frequent intervals, likewise if there is high
consumption of hot water for tea and so forth.
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If the problem cannot be resolved, turn the machine off and contact Technical Service. Do not attempt
any sort of repairs.
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The descaling of the machine must be carried out by professional technicians to ensure that such
operation does not lead to release of hazardous materials for food use.
18. Suggestions on how to obtain a good cup of coffee
To obtain high-quality coffee, it is important that the hardness of the water used does not exceed 4-5 °f (French
degrees). If the water hardness exceeds these values, it is advisable to use a water softener.
avoid using a water softener if the water hardness is less than 4 °f.
if the taste of chlorine in the water is particularly strong, a special filter should be installed.
it is not advisable to keep large stores of coffee beans. Never grind large amounts of coffee. Use the amount the
doser holds and if possible use it by the end of the day. Never purchase ground coffee as it expires quickly.
after the machine has not been used for a period of time (2-3 hours) make a few dry runs.
make sure to carry out regular cleaning and maintenance.
Intervention Weekly Monthly
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