STONE Espresso Coffee Machine Instructions
- June 11, 2024
- Stone
Table of Contents
Espresso Coffee Machine
Product Information: STONE Espresso Coffee Machine
The STONE espresso coffee machine is a domestic use coffee
machine designed to provide exquisite quality in cups of
coffee-based beverages. The product comes with a user and
maintenance manual that provides important guidelines for use,
maintenance, and safe installation. The machine is manufactured by
STONE S.r.l. and complies with the applicable essential
requirements of various directives and regulations including
pressure equipment, electromagnetic compatibility, low voltage,
WEEE, RoHS, and food contact materials. The product complies with
various standards including EN 55014-1:2017-04, EN
55014-1/A11:2020-03, EN 55014-2:2015-04, EN 61000-3-2:2014-08, EN
61000-3-3:2013-08, EN 61000-3-3/A1:2019-08, EN 62233:2008/AC:2008,
EN 60335-2-15:2016/A11:2018, and EN 60335-1:2012/A2:2019.
Product Usage Instructions
-
Unpacking: Carefully unpack the contents of
the package and ensure that all the components are present. -
Installation: Fill the water tank with water
and connect the machine to an electrical power supply. -
Start-Up: Turn on the machine and wait for it
to heat up. -
Machine Operation: Follow the instructions in
the manual to prepare coffee-based beverages and dispense
steam. -
Alarms and Faults: Refer to the manual for
information on alarms and troubleshooting. -
Inactivity: If the machine is not used for a
certain period of time, refer to the manual for instructions on how
to store and maintain it properly.
It is important to carefully read and follow all the
instructions in the manual to operate the machine correctly and
ensure its safe use and maintenance.
COFFEE MACHINE FOR DOMESTIC USE User and maintenance manual Translation of the
original instructions
ITA – istruzioni originali
EN Congratulations on choosing the STONE espresso coffee machine. This product is designed to satisfy your need for exquisite quality in cups of coffee-based beverages. Carefully read the instructions to operate the machine correctly. This manual provides important guidelines for use, maintenance and safe installation. It also contains useful recommendations that will allow you to maximise the potential of the STONE machine.
STONE
EC DECLARATION OF CONFORMITY
STONE S.r.l. Via E. Curiel 13 – 20060 LISCATE (MI) ITALY
being the manufacturer of COFFEE MACHINES, hereby declares that the product:
Modello STONE
to which this declaration refers, complies with the applicable essential
requirements of the following DIRECTIVES and REGULATIONS and subsequent
amendments:
2014/68/UE Directive of pressure equipment (PED) with applied the exclusion to
Chapter 1 Article 1 Par. 2 (f)
2014/30/UE Electromagnetic compatibility EMC Directive 2014/35/UE Low voltage
Directive 2012/19/UE WEEE Directive 2011/65/UE RoHS Directive 1935/2004/EU
Regulation on food contact materials
– in compliace with standards
EN 55014-1: 2017-04 EN 55014-1 / A11: 2020-03 EN 55014-2: 2015-04 EN
61000-3-2: 2014-08
EN 61000-3-3: 2013-08
EN 61000-3-3 / A1: 2019-08 EN 62233: 2008 / AC: 2008 EN 60335-2-15: 2016 / A11: 2018 EN 60335-1: 2012 / A2: 2019
The STONE S.r.l., Via E. Curiel, 13 – 20060 LISCATE (MI) – ITALY is
responsible for establishing and maintaining the technical file.
This declaration is null and void if the machine is modified without the
express authorization of the manufacturer or if improperly installed and used
in a way that does not comply with indications in the users’ manual and the
instructions.
Date of Issue:
Liscate
29 – 10 – 2021
Managing Director Dott. Federico Alessandro Gallia
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STONE
CONTENTS
1 INTRODUCTION ……………………………………………………………………. 6 1.1 SYMBOLS AND TERMINOLOGY USED
IN THE MANUAL.. 6 1.2 GENERAL INFORMATION ……………………………………………… 7 1.3 SAFETY
INSTRUCTIONS ………………………………………………. 8
2 UNPACKING …………………………………………………………………………… 10 2.1 CONTENTS OF THE PACKAGE……………………………………… 10
3 DESCRIPTION OF THE MACHINE ………………………………………….. 11 3.1 INTENDED USE …………………………………………………………….. 11 3.2 TECHNICAL SPECIFICATIONS ……………………………………… 11 3.3 MAIN COMPONENTS …………………………………………………….. 12 3.4 ACCESSORIES ……………………………………………………………… 13 3.5 TECHNICAL DATA …………………………………………………………. 13
4 INSTALLATION ……………………………………………………………………. 14 4.1 FILLING THE WATER TANK …………………………………………… 15 4.2 ELECTRICAL POWER SUPPLY ……………………………………… 15
5 START-UP
……………………………………………………………………. 16
6 MACHINE OPERATION …………………………………………………………… 17 6.1 COFFEE PREPARATION ……………………………………………….. 18 6.2 STEAM DISPENSING …………………………………………………….. 19
4
STONE
7 MAINTENANCE………………………………………………………………………. 20 7.1 CLEANING THE STEAM WAND
……………………………………… 20 7.2 CLEANING THE DISPENSING HEAD …………………………….. 21 7.3
CLEANING THE PORTAFILTER……………………………………… 50 7.4 CLEANING THE WATER TANK
………………………………………. 22 7.5 CLEANING THE DRIP TRAY…………………………………………… 23 7.6
DESCALING ………………………………………………………………….. 24 7.7 WATER REPLACEMENT IN THE BOILER
………………………. 24
8 ALARMS AND FAULTS …………………………………………………………… 26 8.1 ALARMS
……………………………………………………………………. 26 8.2 TROUBLESHOOTING ……………………………………………………. 26
8.3 INACTIVITY …………………………………………………………………… 28
9 DISPOSAL
……………………………………………………………………. 30
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1 – INTRODUCTION
STONE
BEFORE PERFORMING ANY OPERATION ON THE MACHINE, THE USER MUST CAREFULLY READ
THE INSTRUCTIONS CONTAINED IN THIS PUBLICATION AND FOLLOW THEM THROUGHOUT THE
INTERVENTIONS.
IF IN DOUBT ON THE CORRECT INTERPRETATION OF THE INSTRUCTIONS, CONTACT OUR
ASSISTANCE SERVICE FOR THE NECESSARY CLARIFICATIONS.
1.1 Symbols and terminology used in the manual
DANGER: this symbol indicates information or procedures which, if not
carefully followed, may cause serious personal injuries. Potential source of
injury or harm to health.
CAUTION The instructions accompanied by this symbol contain information, requirements or procedures, which can cause damage or malfunctions, if not carried out correctly.
i
INFORMATION The guidelines indicating this symbol contain information on particularly important topics and failure to comply with them may render the warranty null and void.
CAREFULLY READ the instruction manual before commissioning.
CAUTION: machine connected to the electrical mains!
Disconnect the power supply before performing any maintenance. CAUTION: hot contact parts!
Wear protective gloves.
6
STONE
OPERATOR: this symbol indicates information or procedures concerning the user
of the machine. Procedures within the competence of the person in charge of
machine operation, use and routine maintenance.
QUALIFIED TECHNICIAN: this symbol indicates information or procedures
regarding special maintenance (electrical / mechanical) for a qualified person
authorised by the manufacturer
1.2 General information
This manual is an essential part of the STONE product; therefore, it is crucial that you read
the enclosed warnings and precautions carefully before operating the machine. In particular,
pay attention to the safety instructions during installation, commissioning, use and cleaning.
Please keep this user manual in a safe location where it may be available to all users of the
machine.
i
The coffee machine description provided below is of a general nature and may, therefore, not include all details on the various components. The official language chosen by the manufacturer is Italian.
This manual reflects the state of the machine at the time of supply. STONE reserves
the right to make, at any time, all the changes it deems appropriate to mass production and
update the related manuals without the obligation to update previous production and manuals,
as well as inform users of previously supplied machines.
CAUTION
THE MANUFACTURER SHALL NOT BE LIABLE FOR ANY DAMAGE CAUSED TO
PEOPLE OR PROPERTY DUE TO:
Improper use of the machine. Use by unsuitable personnel (unauthorised and/or
untrained). Power supply defects. Lack of maintenance on machine components.
Changes to the machine not authorised by the manufacturer. Use of non-original
spare parts. Replacement of components supplied with the machine with other
components having
different technical specifications from those in the project. Failure to
comply with these instructions. Failure to comply with the safety regulations.
TRANSPORT AND HANDLING When handling the machine, take the necessary
precautions to prevent it from falling, damaging people, animals and things,
as well as the machine itself. Do not carry out this operation by yourself. It
is recommended to have two people handle the appliance.
When handling the machine in the packaging, be sure to follow the wording
“THIS
WAY UP” (identified by the symbol ) on the packaging.
Do not overturn the machine during handling. Handle with care. The
manufacturer cannot be held responsible for damage caused by incorrect
handling or by not complying with the indications provided.
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1.3 Safety warnings
STONE
1. Do not leave the packing elements (plastic bags, expanded polystyrene,
nails, cardboard, etc.) within the reach of children, as these elements are
potential sources of danger.
2. Install the machine on a flat, water repellent surface (laminate, steel,
ceramic, etc.) away from heat sources (oven, cooking stove, fireplace, etc.)
and in conditions in which the temperature cannot drop below 5°C. Keep warm.
3. Do not leave the machine exposed to environmental elements or place it in
damp rooms. 4. Do not obstruct the grids and do not cover with cloths, etc. 5.
Keep the packed machine in a dry place, not exposed to environmental elements
and in
conditions in which the temperature does not go below 5° C. 6. Do not place
heavy items on the package. 7. In an emergency, such as fire, unusual noise,
overheating, etc., take immediate action by
disconnecting the power. 8. The installation and repair must conform to the
codes and local electrical safety regulations. 9. The STONE machine must be
installed after reading and understanding this publication 10. This machine is
only safe when it has been correctly connected to an efficient earthing
system. 11. Check to see that the data on the rating plate corresponds to that
of the main electrical mains
to which the machine will be connected. Before connecting the machine to the
electrical mains, make sure that the voltage, frequency and power of the
machine correspond to those of the local electrical mains. The electrical data
are indicated on the machine data plate. 12. We do not recommend the use of
accessories such as adaptors, multiboards or extension cords not recommended
by the appliance manufacturer as they may cause injuries. 13. Do not use this
machine if the cable, plug or any other part is damaged or if the machine
malfunctions. Return the machine to the nearest authorised service facility
for examination, repair or adjustment. CAUTION: The power cable must not be
replaced by the user. 14. This machine has been designed for the sole purpose
of producing coffee and dispensing steam for hot beverages. All other uses are
inappropriate and dangerous. The manufacturer shall not be held responsible
for any damage caused by inappropriate use. 15. To protect against electric
shocks when using any electrical appliance including your STONE machine: a. Do
not immerse the machine itself, cable and plugs in water or other liquid and
do not
let the machine’s internal parts get in contact with liquid. b. Prevent the
power cable from being stretched or pulled tight. c. Do not use the machine
with wet hands or feet.
8
STONE d. Do not allow children or untrained persons to use the machine. e. Do
not operate the machine with bare feet. f. Place a circuit breaker at the
electrical mains feeding the machine. g. Do not tip liquids on top of the
machine. h. The machine should not be exposed to elements such as sunlight,
rain, snow, extreme
temperatures etc. 16. Always use STONE certified and manufactured spare parts
and accessories. 17. Before performing any cleaning or maintenance turn the
machine off by means of the
machine’s power switch and disconnect the machine from the electrical supply.
18. This appliance is intended for domestic use. 19. If the machine operates
in a faulty manner or stops working, turn it off immediately and
disconnect it from the electrical supply. Do not attempt to repair it but
contact an authorized and qualified STONE technician. Any repair must be
performed by the manufacturer or by an authorized dealer using only original
parts. 20. When the machine is not used for long periods of time it must be
stored at a temperature above zero (0°C / 32°F). This will prevent the
hydraulic system from freezing, which could damage the internal pipes and
boiler 21. The machine must be used with drinking water. Use a water softener
if water from the local mains has a high mineral content. A build-up of
mineral deposit may restrict the flow of water within the hydraulic systems
causing damage to the machine and risking personal injuries. Conversely,
highly “pure” waters may interfere with the electronic signals read by the
machine for both boiler level and water tank level indications. Use filtered
water. 22. The appliance is not to be used by persons (including children)
with reduced physical, sensory or mental capabilities, or lack of experience
and knowledge, unless they have been given supervision or instruction. 23.
Keep the appliance and relevant cable out of reach of children. 24. Children
must not play with the appliance. 25. Do not pull the power cable to
disconnect the appliance from the power supply. 26. To ensure correct
operation and efficiency of the machine, it is required to follow the
manufacturer’s instructions, carrying out cleaning and routine maintenance
operations. 27. During machine operation some parts reach high temperatures,
such as the dispensing units, the portafilters and the steam nozzles (indicate
the photo with the figures?). Pay attention not to touch or put your hands
under these parts when using them, to prevent scalds or burns. 28 Never remove
(disengage/release) the portafilter while dispensing coffee.
9
STONE
2 – UNPACKING
Before proceeding, the machine installation personnel must read these
instructions and, in particular, the previous sections regarding general
information and safety requirements.
2.1 Contents of the package
The machine is supplied fully assembled (with the exception of the accessories
contained in the special boxes – fig. 2.1).
The weight of the unladen machine is indicated directly on the packaging or is
visible on the “CE” marking plate applied on the machine. The packed machine
must be protected in a sheltered and moisture-free premises until it is
installed in a suitable environment. After removing the packaging, it is
required to verify that the various components are in perfect condition and
that there are no traces of tampering, damaged parts, etc. It will also be
necessary to check that the machine is complete with all its parts, any
accessories and technical documentation as per the transport documentation.
CAUTION! Before proceeding with the installation, in case anomalies are found
in the checks on delivery, report the findings to the manufacturer.
The packaging elements (plastic bags, expanded polystyrene, nails, cartons, etc…) must not be left within the reach of children as they are potential sources of danger. These elements must be disposed of in accordance with the local regulations in force
fig_2.1 10
3 – DESCRIPTION OF THE
MACHINE
STONE
3.1 Intended use
The machine has been designed and built to be used to prepare espresso coffee
and hot drinks. Any other use is to be considered unsuitable and therefore
dangerous.
The manufacturer cannot be held responsible for any damage caused to people or
things due to unsuitable, erroneous or irrational use of the machine The
operator must always follow the indications contained in this manual. In the
case of a failure or if the machine is not working properly, switch it off and
do not attempt any direct repair. Contact the service centre.
3.2 Technical specifications
Eco mode available (see par. 6.3)
Boiler capacity: 1.5 litres (1000 W)
Voltage (version A): 220-240V – 50/60 Hz for EC versions Voltage (version B):
115V – 60 Hz for USA/CAN versions
Coffee unit resistance: 200 W
Removable water tank: 1.2 L
Dimensions and weight (fig_3.1) Width: 225 mm Depth: 440 mm Height: 355 mm
Weight: 20.5 Kg
Panels (front, top, rear): Stainless steel
Side panels: Available in different colours and materials
fig_3.1
11
STONE 3.3 Main components (fig._3.2)
fig_3.2
1. ON / OFF: “O” = OFF “I” = ON
2. Control indicators. 3. Coffee dispensing knob 4. Steam dispensing knob. 5.
Steam wand 6. Pressure gauge.
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7. Portafilter. 8. Water tank holder compartment 9. Cup warmer 10. Cup warmer grids + tray. 11. Eco Mode button. 12. Removable side panels
STONE
3.4 Accessories
The machine is supplied complete with a wide series of accessories (fig._3.3).
The first box contains the following parts and accessories:
1. Portafilter – single 2. Portafilter – double 3. Tamper 4. Blind filter 5.
Dispensing head cleaning brush.
fig_3.4
fig_3.3
The second box contains the following parts and accessories (fig._3.4): 1.
Removable side panels 2. Grid 3. User manual.
3.5 Technical data
Volt
Please refer to the technical data plate on the machine.
Power
Please refer to the technical data plate on the machine.
Temperature
The machine must not be operated with temperatures under 5°C and over 36°C.
Water
The machine must be operated with soft, clean drinking water. If the local
water mains has a high mineral content, use a water softener. The water
hardness must be between F° 4 – 7° (French) / D° 7 – 16° (German). A build-up
of mineral deposit may restrict the flow of water within the hydraulic systems
causing damage to the machine and risking personal injuries.
Boiler capacity
1.5 litres
13
4 – INSTALLATION
STONE
The machine must only be installed in places where it is easy to use and access. The support surface must be levelled, dry, smooth, stable and at such a height that the base is at least 100/105 cm approx. above the ground. (fig._4.1) Do not use or install where water jets are used.
fig_4.2
If the machine is wet or very damp, wait until it is completely dry before
installing or using it.
The machine is supplied without the removable side panels. Apply the 10
magnetic panels (5 per side) respecting the arrangement shown in the figure
4.3
click
fig_4.1
In order to ensure normal operation, the machine must be installed in areas
where the room temperature is between +5°C and +36°C and humidity does not
exceed 70%. Ensure that there is an open area of at least 10 cm on each side
and behind the machine to allow adequate ventilation and facilitate its use
and the performance of any maintenance operations. (fig._4.2)
14
fig_4.3
4.1 Water fillingtank
STONE 4.2 Electrical power supply
Make sure to use water with a degree of hardness suitable for this type of
machine (see par. 3.5 page 41)
The machine has to operate with clean soft drinking water. Never attempt to
operate the machine with water of a hardness other than that specified in
paragraph 3.5.
Before connecting the machine ensure that the identification label data comply
with those of the local electric mains. The earthing system must be carried
out in accordance with the provisions of current legislation.
Connect the power supply cable (fig. 4.5)
Lift the cover of the tank compartment (1 fig. 4.4) and fill with water (MAX
1.2 L). The manufacturer recommends inserting a softener bag in the water
tank.
Pay attention to only pour water into the water tank, use a funnel if
required. (to remove the tank for cleaning see chap. Maintenance page 48).
Reposition the cover of the water tank compartment.
fig_4.5
Arrange any excess cable on the worktop, so that it cannot be pulled by
children or cause tripping
The cable must be positioned correctly and come out of the machine at the centre of the rear side in the special groove in the lower part of the sheet metal panel.
fig_4.4
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Check the package for validity of the softener used (quantity of litres)
CAUTION: If the power supply cable is damaged it is to be replaced by the
manufacturer or by their technical assistance service or by a person with
equivalent qualification, in order to prevent any risks.
15
STONE
5 – START-UP
We assume the machine has been installed correctly. Turn the On/Off switch (1
– fig._5.1) from
position “O” to position “I”.
The boiler heating begins. Wait for the boiler pressure gauge (4 – fig._5.3) to indicate approximately 1 bar.
The indicator (2 – fig._5.1) lights up with a fixed white light.
fig_5.3
fig_5.1
Open the steam knob (3 – fig._5.2). to start filling the boiler with water
(the noise of the pump must be heard).
When the boiler is correctly filled with water, the pump stops (the noise
stops). Then close the steam knob.
Open the steam knobs (3 – fig._5.4) for 5 seconds to allow some steam to
escape. This operation is highly important as it eliminates any vacuum inside
the boiler which may cause milk to be sucked into the boiler once steam
dispensing has begun. Close the steam knob again.
Wait for the boiler pressure gauge (4 fig._5.3) to reach 1 bar again.
fig_5.2 16
fig_5.4
STONE
Turn the brew paddle fully anticlockwise (4 – fig._5.5). Drain a cup of hot water from the infuser unit head (5).
6 – MACHINE OPERATION
This operation must only be performed once at first use.
Make sure that the machine is ready for full safety operation as described in the previous chapters
CAUTION:
The portafilter unit heats up when the machine is ready. Pay attention
fig_5.5
Fully turn the brew paddle clockwise to stop the flow of water (fig._5.6)
It is recommended to perform a
i
first water dispensing without
coffee with a new portafilter or on first use. This operation is
recommended to eliminate any
processing residues
1. Install the portafilter by inserting it into the unit head and rotate the
relevant handle from left to right. The portafilter is inserted properly once
it is firmly inside the unit head and the handle is sitting at 90 degrees from
the front of the machine (fig._6.1)
fig_5.6
The machine is now ready for use
Allow a heating time of 15-18 min-
i
utes so that the head of the unit is fully heated: the quality of the espresso will be greatly improved with
a hot unit and portafilter inserted.
fig_6.1
2. Now rotate the brew paddle to start the water flow through the
portafilter. (fig_6.2)
17
STONE
2. Fill with ground coffee and press (fig._6.4), removing any coffee residues
on the edge of the filter
fig_6.4
fig_6.2
2. Hook the portafilter to the dispensing unit and place the cup(s) under the coffee dispensing spout.
3. It is important to leave the portafilter hooked in the unit head when not in use. The portafilter must remain heated for an optimal brew process. It will also prevent the seal inside the unit head from drying out prematurely.
6.1 Coffee preparation
1. Choose the portafilter for the preparation of one or two cups in a single
dispensing (fig._6.3).
fig_6.3 18
fig_6.5
3. Start dispensing by turning the paddle anticlockwise. Turn the paddle
clockwise to stop dispensing.
STONE
The maximum duration of a single 6.2 Steam dispensing dispensing is 100 seconds. After
this time, dispensing stops auto- With the machine turned on and pressure
matically even if the user has not gauge (see chap. 5 page 44) pressurised, it
closed the lever.
is possible to dispense steam from the special
Dispensing has priority over filling: nozzle.
if dispensing is requested while the Take a jug and place the steam wand into the
machine is filling water, filling is tem- drink and open the steam tap (3 – fig_6.7)
i
porarily suspended and dispensing begins regularly. It is possible to
dispense even when the machine
has not yet reached the first level.
4. Remove the portafilter to empty and clean it and then hook it up again (fig_6.6)
fig_6.6
fig_6.7 Once the desired dispensing is complete, close the tap and remove the
jug. Clean the nozzle with a damp cloth. Dispense steam for a few seconds and
then clean again with a damp cloth (fig_6.8)
fig_6.8 19
STONE
CAUTION: The jet of steam may cause burns.
7 – MAINTENANCE
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For best results: store milk at 5°C ( 41°F)
Maintenance operations must be carried out when the machine is off and cold. Some particular operations must be performed when the machine is operating.
6.3 ECO mode
When ECO mode is enabled, the machine enters standby after 60 minutes of
inactivity. When the machine is in standby, all heaters are off and delivery
is not possible. The machine exits standby by operating the dispensing paddle.
To activate the ECO-ON mode press the button under the machine (fig_6.9).
Do not clean the machine by using metal or abrasive devices, such as steel
wool, metal brushes, needles, etc. or general detergents (alcohol, solvents,
etc.) When necessary, use special detergents for coffee machines that can be
purchased in specialised service centres.
Keeping your machine clean will prolong its life and produce better espresso
beverages.
7.1 Cleaning the steam wand
1. Clean the steam wand after every use by wiping with a damp cloth. Turn the
steam wand on to release condensation and milk residue.
2. If the steam jets become clogged with the powdered milk, unscrew the
nozzle and unlock/clean with a paper clip (fig._7.1).
fig_6.9
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The machine is supplied from the factory with the ECO mode activated.
20
fig_7.1
STONE
7.2 Cleaning the dispensing head
BACKFLUSHING 1. Remove the filter basket from the portafilter
and fit the blind filter (A – fig_7.2). 2. While the brew water is flowing,
insert the
portafilter into the unit head, rotating the portafilter back and forth(B –
fig_7.2). Keep emptying the blind basket of hot water until the water runs
clear. 3. Backflush the unit head every day.
REMOVING THE SPRAYER, DIFFUSER
AND HEAD GASKET 1. Using a small slotted screwdriver, pry the
inner edge of the sprayer (1) and remove it together with the gasket (2) as
shown in fig_7.3.
fig_7.3
2. With the same screwdriver, unscrew the diffuser (3) from the head
(fig_7.4).
fig_7.2
DISPENSING UNIT HEAD 1. Every week, after backflushing, add a small
amount of espresso cleaning detergent to the blind basket. Dissolve the
detergent in hot water and insert the portafilter into the unit head. This
detergent is available from every authorised dealer. 2. Turn on and off via
the unit paddle for about 10 seconds. Repeat several times.
fig_7.4 21
STONE
3. Scrub the inside of the unit head with the unit cleaning brush supplied (fig_7.5).
If the elements of the head are worn or damaged, replace them. These items are consumables. Contact your authorised STONE dealer.
fig_7.5
4. Using a damp cloth, clean the area where the portafilter connects to the
unit head.
5. Soak the metal parts that have been removed in a solution made from 2
teaspoons of espresso cleaning detergent and hot water. Soak for 10 minutes.
Rinse thoroughly, clean and return.
6. Screw the head diffuser back on respecting the order shown in figure 7.6.
Lastly, insert and hook the sprayer with its gasket
7.3 Cleaning the portafilter
PORTAFILTER 1. Remove the filter basket from the portafilter
handle using a small screwdriver or the under-side of the blind basket.
(Fig._7.7) 2. Wipe the inside of the basket and portafilter clean with a damp
cloth. 3. If the coffee oils have built up, soak the metal end of the
portafilter and basket in the same detergent solution as the brass shower foil
described above. 4. Rinse thoroughly, dry and reassemble.
fig_7.6
fig_7.7
22
STONE
7.4 Cleaning the water tank
Periodically remove and clean the water tank with warm soapy water. To remove
the tank, lift the cover (1 – fig._7.8) and extract the tank (2) using the
handle: perform an upward movement.
7.5 Cleaning the drip tray
1. Remove the grid and the tray and wash with warm soapy water. Rinse and
dry. (fig._7.9)
fig_7.8
fig_7.9
2. First reassemble the tray, making sure that it is placed and inserted
(with horizontal movement) until it reaches the “stop”, after “hooking” has
taken place (a magnetic click at the end of the stroke should be heard
fig._7.10)
CAUTION: If the tray is left resting and not fully inserted, the drain water
on the rear is poured into the machine until it comes out without being
conveyed into the drain tray.
When reinserting the tank, be sure to firmly press down so that the bottom
tank tap is
fully engaged. Use fresh, filtered water to fill the tank. Do not use
distilled water (see par. 3.5 page 41).
click
fig_7.10 23
STONE
7.6 Descaling
1. STONE does not recommend
removing limescale from the
espresso machine. Contact an
authorised Stone centre for
descaling.
2. Many of the chemicals used to
i
descale espresso machines are particularly aggressive. These chemicals can cause internal
corrosion of hard metals used in
the construction of the machine.
3. Additionally, it is very difficult to
remove all the descaling solution
from the machine once the proce-
dure is completed.
4. Check the quality of the water you use in
the machine, always using filtered water.
Distilled water may lack the necessary
conductivity required for various electronic
functions needed in the operation of the
machine.
partial discharge of the water contained in the boiler (approximately 40/50%
of the content)
fig_7.11
7.7 Water replacement in the boiler.
It may be required to change the water in the boiler. This operation must be
carried out by a specialised technician or by the STONE service centre
2. Place a medium-sized container under the steam wand and cover with a cloth
to contain splashes of hot water (Fig._7.12).
CAUTION: the drained water has a high temperature: protect yourself with
gloves to prevent scalds or burns
IMPORTANT: This operation must be carried out with the machine just turned off
with hot water and the boiler pressurised. (Fig._5.3)
1. Insert a small blade screwdriver into the hole of the cup warmer shown in
the figure 7.11, until you reach a screw tap. Rotate 90° anticlockwise
(Fig._7.11). This operation switches the steam wand into
24
fig_7.12
STONE
3. Open the steam tap and let the water drain until it runs out. Dispensing will stop when the pressure gauge is at 0 bar (Fig._7.13).
5. Turn the machine back on.
The machine will start filling water into the boiler. Make sure the tank is
sufficiently full
(Fig._7.15).. Once pressurised, you can turn off and repeat the operation or
(having returned the tap to the normal “steam” position) you can go back to
using the machine
normally
fig_7.13
4. Close the steam tap and turn the screw tap 90° clockwise back to the
initial position. (Fig._7.14).
fig_7.15
fig_7.14 25
8 – ALARMS AND FAULTS
STONE 8.2 Troubleshooting
8.1 Alarms
The machine has a colour LED indicator on the front panel. During normal
operation (dispensing and standby) the LED is fixed white.
Other conditions are signalled by different combinations of colours and
flashes:
The machine does not start Check that the main switch is in the ON po-
sition. Check that the plug is inserted.
No coffee or steam dispensing
Alarm
Cause
Solution
BLUE flashing Alarm
Fill the tank
light
empty tank with water
ORANGE flashing light
Boiler probe not working
Contact STONE assistance
Loading
interrupted
because the
RED flashing machine did Wait for load-
light
not load wa- ing end
ter within the
pre-estab-
lished times
GREEN flashing light
Eco mode active
Activate dispensing to reactivate the
machine
Press the button to deactivate (see par. 6.3)
Check that water is present in the tank .
Check that the coffee and steam controls have been activated before dispensing
.
The machine does not heat Contact the technical assistance
Irregular steam dispensing
Make sure the sprayer holes are clean
Extraction is too slow Check that the filter basket is not too full
(too much coffee). Check that the grind is not too fine. Check that the shower
foil is not blocked:
it may need to be back-flushed or be removed and cleaned Check that the spout
of the portafilter is not blocked. If it is dirty with rancid coffee oil, it
will need to be soaked in an espresso head cleaning solution.
Water leaking from the portafilter Check the head gaskets. If visibly worn,
they will need to be replaced.
26
STONE
Ensure the portafilters are kept in place on the head whenever the machine is
not in use, as this will help to protect the seals.
Espresso is too cold Check that the cups are hot enough.
Cups can be heated by pouring hot water into them, and then discarding it,
before starting the extraction.
Too much water may have been drawn from the unit head. Let the machine rest
and limit the amount of water drawn from it between extractions to ensure the
machine remains at temperature.
Water underneath the machine Check that the tray is inserted correctly Check
that the drain tray has been emp-
tied
Espresso is watery and thin
Extraction may be too fast. If so, the cream will be pale. Check that the
grinding is not too coarse. Correct the grinding and make it finer.
Espresso is bubbly
The water in the machine may be too hot. Let some water flow from the unit
head. Perform another extraction.
The coffee may be too fresh.
Low or no pressure from the steam wand
It may be due to excessive use of the unit head. Excessive use of the steam
wand. Give the machine time to recover pressure.
The steam wand may be clogged with dry milk. Remove the nozzle and clean it as
indicated in point 7.1.
The machine appears to be off but the switch is in the ON position
Check that the stand-by function is active by activating the coffee control.
Switch the machine off and on again from the main switch (see 1 – Fig. 3.1)
Espresso tastes bitter Extraction may be too slow. Check that
the grinding is not too fine. Correct the grinding and make it coarser.
The machine may be dirty. Backflush again and clean the unit head. Clean the
portafilters and filter baskets.
Milk is thin and bubbly
Ensure the milk is being stretched gradually. If air is introduced too
quickly, large bubbles will form.
Make sure that the steam comes out with the right pressure and that there are
no blocked nozzles.
It may be due to using reheated milk. Try again with fresh milk.
Espresso tastes sour
Extraction may be too fast. Check that the grinding is not too coarse. Correct
the grinding and make it finer.
27
STONE For any type of problem not specifically indicated on this page, turn
off the machine by pressing the main switch, disconnect the plug and contact
our technical assistance.
8.3 inactivity For prolonged machine inactivity, it is required to carry out
certain preventive operations: disconnect the machine electrically. unload all
portafilters. wash all the parts in contact with food-
stuffs. clean all the internal and external surfaces
of the machine with a cloth. protect the outside with a cellophane film
or sack. store in dry sheltered rooms with temper-
atures no lower than 1°C.
28
9 – DISPOSAL
STONE Decree 22/1997).
Proceed with emptying the products and the water as described in the previous
paragraph.
Caution! Check that machine disposal is performed with respect of
environmental rules and according to the regulations in force
Information to the users Pursuant to It.Legislative Decree 25 September 2007,
no. 185 and art. 13, It.Legislative Decree 25 July 2005, no. 151
“Implementation of Directives 2002/95/EC, 2002/96/EC and 2003/108/ EC, on the
restriction of the use of hazardous substances in electrical and electronic
equipment, and on the disposal of waste”.
The barred waste bin symbol on the equipment means that the product, at the
end of its service life, must be disposed of separately from the other types
of waste.
The user must therefore transport the equipment, at the end of its service
life, to the appropriate separate collection centres for electronic/ electro-
technical waste products or return it to the dealer when purchasing a new
equivalent equipment.
The appropriate separate collection and the following sending of the used
equipment to recycling, treatment and eco-friendly disposal will help avoid
negative effects on the environment as well as on health along with an easier
recycling of the materials forming the equipment.
Any unauthorised disposal of the product by the user shall imply the
enforcement of the administrative sanctions set forth in It.Leg. Decree
22/1997 (art. 50 as amended, It.Leg.
29
Notes
STONE
30
All rights reserved. This manual may not be reproduced, in whole or in part,
without the prior written authorization of STONE s.r.l.
STONE s.r.l. reserves the right to make any changes it deems necessary at any
time.
STONE S.R.L. Corso Italia, 22 – 20122 MILANO Italy www.stone-espresso.com
01-2022 – Ed. 01
References
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