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Intervention
NON-RETURN DRAIN VALVE
• Activate the delivery groups for about 30 seconds;
• attach a filter holder (7) with a gauge (available
on request) to the delivery group;
• activate the delivery group, and use the pressure
gauge (8) to monitor the pressure as it increases
up to 8-9 bar;
• check the increase in the pressure due to the
expansion of the heated water up to a value of
approximately 12 bar: reaching this value confirms
proper operation of the valve, as well as of the
gaskets and solenoid valves seal;
• deactivate the deliveries;
• check the other delivery groups.
GRINDER-DOSER
check the ground coffee dose (between 6 and 7
grams for each time); 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. Carry out maintenance of the
boiler and of the hydraulic circuit, replacing any
components as required. 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
Technical manual
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Intervention
HYDRAULIC CIRCUIT
Check for lime scale deposits on the heating ele-
ment, on the exchanger (inside and out) and on the
hydraulic circuit. When replacing any components,
always replace the relative gasket as well.
DISPENSING UNIT
Check the condition of the solenoid valve of the
delivery group.
DRAIN
Check for trace water leaks on the counter. Also
check the condition of the discharge tub and its
connection to the sewer system.
All maintenance operations must be carried out
!
after disconnecting the power supply, water
supply, and after the complete cooling of the
machine.
We recommend the use of appropriate
protective gloves.
After maintenance and/or repair intervention,
the components used must ensure that the
hygiene and safety requirements initially
!
provided for the appliance are still met. These
are met by using original spare parts only. After
repair or replacement of components related to
parts in direct contact with water and food, a
washing procedure has to be carried out, as in
the case of first installation.
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