LB.00068.20 Pagina 35
6) faulty electrical connection (coffee dispensed continuously).
Note: If the coffee is dispensed continuously, use the machine as if it were manual: press the required key to start up the dose, then
press the same key to stop the dose being dispensed, after checking the amount in the cup.
5) Safety thermostat operation.
Cause: The water level in the boiler has dropped lower than the resistor.
Result: the heating is disabled, the boiler pressure gauge indicates a falling pressure.
Solution: carry out the following controls.
1) Level probe (SLC) and safety probe (SLS) are earthen
2) level probe (SLC) is earthen and resistor remote control switch has stuck contacts.
6) Safety valve operation.
Cause: overpressure in steam boiler
Result: the 1.7-1.9 bar safety valve opens and releases steam in the upper part of the machine.
Solution: carry out the following controls:
1) Pressure switch contact is stuck
2) pressure switch feed tube is clogged
3) contacts of resistor remote control switch are stuck.
7) Anti-vacuum valve.
The "10" anti-vacuum valve (see hydraulic diagram) is installed on the boiler and prevents any air remaining during the loading phase
and a depression being created during the heating phase.
8) Anti-suction valve.
The anti-suction valve is installed on the steam taps and prevents milk from entering into the boiler when there is a depression.
9) Non-return valve.
The "2" non-return valve (see hydraulic diagram) is installed between the (Y2.3) loading solenoid valve and the boiler, and has the
following function:
During the loading phase it opens by means of the water pressure, letting the water enter into the boiler.
Once the loading phase is over, it closes preventing the water in the steam boiler from returning to the water supply network.
SPECIAL MAINTENANCE
Routine maintenance must be carried out daily by authorised staff as specified in the specific chapters of instructions of the machine.
Cleaning of the coffee outlet by means of the provided special brush is part of the daily maintenance.
Special maintenance must be carried out periodically by the CARIMALI SPA authorised service centre in the following way:
Replace filter holder gasket every 3-6 months
Replace the steam-water valve gasket every 6 months
Replace the steam nozzle joint gasket every 6-12 months
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