Conti TWIN STAR 2 R-EV 2G Guide

- 04/2008 - V1.02
SACOME, CONFIDENTIAL Document, it is forbidden to duplicate or communicate this document without previous authorization.
VERSION 2G & 3G
TECHNICAL DOCUMENTATION

1
1INTRODUCTION : INSTRUCTIONS AND RECOMMENDATIONS..........................2
1.1 Installation instructions ........................................................................................2
1.2 Warranty..............................................................................................................2
1.3 Safety instructions ...............................................................................................2
1.4 Power supply instructions....................................................................................2
2TECHNICAL FEATURES..........................................................................................3
3ACCESSORIES ........................................................................................................4
4INSTALLATION:.......................................................................................................4
4.1 First installation:...................................................................................................4
4.2 Next filling............................................................................................................6
5DESCRIPTION OF OPERATING DEVICES .............................................................7
5.1 Steam tap............................................................................................................7
5.2 Hot water tap .......................................................................................................7
5.3 Filters...................................................................................................................7
5.4 Dummy filter ........................................................................................................7
5.5 Filter- holders.......................................................................................................7
5.6 Steam jet (option) ................................................................................................8
5.7 Espresso tray.......................................................................................................8
5.8 Water hardness tester .........................................................................................8
6FUNCTIONING & PROGRAMMING.........................................................................9
6.1 Automatic switching ON & OFF...........................................................................9
6.2 Programming.....................................................................................................10
6.3 Beverage preparation........................................................................................11
6.4 Others functions.................................................................................................14
6.5 Alarms ...............................................................................................................17
6.6 Heating of the boilers.........................................................................................19
7HOW TO MAKE A PEFECT ESPRESSO...............................................................32
8SETTING OF MIXER TAP.......................................................................................33
9MAINTENANCE / SETTINGS .................................................................................34
9.1 Daily Maintenance.............................................................................................34
9.2 Weekly Maintenance.........................................................................................34
9.3 Maintenance every 3 month ..............................................................................34
9.4 12 bar Security valve.........................................................................................34
9.5 Recommendation...............................................................................................34
9.6 Procedure to change the PTFE gaskets............................................................35
9.7 Maintenance parts list on Twin Star 2:...............................................................39
10 DIMENSIONS.......................................................................................................41
11 ELECTRIC DESIGNATIONS ...............................................................................42
12 ELECTRIC DRAWING.........................................................................................43
12.1 CPU board......................................................................................................43
12.2 Electrical power diagram for “400 V 3NAC” & “230 V 1NAC” .........................46
12.3 Electrical power diagram for “230 V 1NAC”....................................................47
12.4 Connecting diagram: 8 fuses box ...................................................................48
12.5 Solid state relay interface for “230 V 3AC”......................................................49
12.6 Solid state relay interface for “400 V 3NAC”...................................................50
13 HYDRAULIC DRAWING......................................................................................51
14 DECLARATION OF COMPLIANCE WITH INTERNATIONAL COMMUNITY
DIRECTIVES.................................................................................................................52

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1 INTRODUCTION : INSTRUCTIONS AND RECOMMENDATIONS
1.1 Installation instructions
- The installation must be carried out by a technician specifically trained by CONTI. The
manufacturer is not responsible for any damages caused due to incorrect installation or
use. The coffee machine must be installed on a solid furniture, supporting its weight
under any circumstances.
- It is necessary to make the machine level to obtain equal coffee portions.
1.2 Warranty
- The life span of the TWIN STAR 2 EVOLUTION depends on the correct use of the
machine, the daily cleaning and preventive maintenance.
The non-respect of the daily cleaning and preventive maintenance would cancel the
contractual warranty.
1.3 Safety instructions
- The machine should not operate without supervision.
- The machine should only be used for its intended purpose.
- Switch on the machine only when the water shut-off valve is open.
- Place empty cups only on the cup warmer.
- Take care: coffee, hot water and steam can cause injuries.
- Never clean the machine with a high-pressure water jet.
- The hot parts of the machine, in particular the group and the cup warmer, can cause
burns. Gloves or a protecting cloth must be used when cleaning the hot parts.
- Gloves should be worn when removing and cleaning the basin to avoid injuries -
- The safety devices must be regularly checked and maintained (service engineer).
- Do not remove the cover panels (risk of electric shock).
- Do not cover the machine in operation to allow air circulation.
A regular and professional maintenance of the machine, the regular regeneration/refill of the
water softener and maintenance of the safety devices are obligatory.
1.4 Power supply instructions
- Never unplug or plug in when the main socket switch is on!
- The machine must be connected to a circuit breaker.
- The customer must provide an electrical installation complying with the requested
standards of the country where the machine is installed.
- The power socket must be protected against current defects.
- The terminal plug must earth the machine.
- A differential circuit breaker is strongly recommended.

3
2 TECHNICAL FEATURES
MAIN WATER SUPPLY DRAIN ELECTRICAL SUPPLY
*Minimum inlet pressure 2,5 Bar
*Water connection pin 3/8".
*The water supply pipes must resist
to a constant pressure of 10 Bars
*Water hardness <10°th (or 5.6°dh)
*If the pressure of the main water.
supply is superior to 5bars a
regulator must be installed
*Without pressure
*Drain hose provided with the
machine
*The drain pipe must be lower
than the machine
400Vac - 50Hz
3 phases
or
230Vac - 50/60Hz
Single phase
TYPE HEATING POWER
(Watt) TOTAL POWER (Watt)
ELECTRICAL
CONSUMPTION
(Amps)
230Vac 400Vac
2 GROUPS 9000 9500 21 max 16 A / phase
3 GROUPS 11100 11500 21 max 18 A / phase
BOILER CAPACITY ( IN LITERS )
2 Groups
3 Groups
TOTAL Hot Water/steam boiler 14 14
Hot water volume 10 10
Steam volume 4 4
Coffee boiler volume 2 x 0.5 3 x 0.5
WEIGHT (kg)
EMPTY
(Kg) Weight in operation (Kg)
2G 73 95
3G 87 110

4
3 ACCESSORIES
- 1 filter holder 1-cup
- 1 filter holder 2-cups for each group
- 1 filter 1-cup
- 1 filter 2-cups for each group
- 1 cleaning filter (dummy filter)
- 1 cleaning brush
- 1 water hardness tester (be careful ! hardness indication in °dh (or °Gh))
- 1 cup support for each group (or espresso tray)
4 INSTALLATION:
4.1 First installation:
A . You must always stamp a reserve on the bill of lading. Open the box, make sure the
machine works properly.
B . Make sure the machine is installed properly:
1/ Make sure the machine is perfectly horizontal. This is very important so that you have the
same amount of coffee in each cup.
2/ Connect the machine to the waterline:
_ A tap must be installed between the water softener and the machine so that the machine is
isolated from the waterline if necessary.
_ Check the waterline pressure (waterline pressure < 5 bar) if not use a pressure reducer set at
3 or 4 bars.
_ Check the inlet water hose is as straight as possible so that the water flow is OK.
_ Use the water hardness test provided with the machine to make sure you have the proper
treatment. Nota: water hardness <10°th (French unit) or < 5.6°dh (or °Gh, German unit).
_ Make sure the drain hose is correctly installed to the drain and maintained with a Serflex type
ring.
_ Check the drain hose is positionned with enough slope to evacuate the water to the drain. Use
a siphon to avoid any smell from the drain.
3/ Connect the machine to electricity:
_ The coffee machine must have its own electrical plug.
_ The maximum power of the Tw2 2Gr Evolution is 9500W (2 groups version) or 11kW (3groups
version). The machine can be connected in 230Vac one phase (40A max) or 400Vac three
phase. Make sure the electrical protection of the machine is adapted to the active power of the
machine.
_ We strongly advise to use a differential breaker.
4/ Check the machine can be ventilated:
_The holes in the body of the machine must be free.
_ No napkin must be placed on the cup heater.

5
C. First machine filling:
You can start the automatic machine filling:
_ Make sure the steam tap "V" is opened (lever up).
_ Engage the differential breaker and check the machine is in Off position (see on the
display). If not put the machine Off immediately by pressing the On/Off button located under the
machine. The displays are lighted in blue.
No button is lighted at this stage.
All functions are disabled apart from the motherboard programming.
The 2 displays show "OFF" and the first group the time also:
_ Use the key (delivered with the machine) to access the program menus. Insert the key into the
lock under the machine and turn to the left. The 2 first buttons of each coffee group are lighted
and the displays show
Nota: once you turn the key, the 4 first buttons of the first group are the programming buttons:
All the information are on the first display (on the left group).
This is the bar menu.
To access other menus, press ENTER for 5 sec. The display then
shows « Password ? » :
In this case for technical menu press 5 times on the first group:
+ + + + +
The display shows:
If you want to change the language, press +or – and press Enter to valid.
OFFOFF HH:mm
Password ???
Groups
enabling Parameters program
Groups
enabling
Language:
English

6
Press many times « MODE » until the right menu to fill up the coffee boilers.
The display shows:
Press ENTER, the machines fills automatically
(during 150sec) the coffee boilers then bleeds the air.
The display shows:
When the coffee boilers are filled.
The display shows again:
Get out from the programming mode, turning the key to the right and turn the machine On
(On/Off button under the machine).
When the machine is ON, the displays show "CONTI", the time, and each coffee group name :
The machine fills automatically the steam boiler.
The display shows:
Put the steam « V » lever down to close the tap.
When the correct water level is reached (SN probe in contact), all the boilers heating up
(coffee and steam) begins.
When a coffee boiler reaches the programmed temperature, all the buttons are lighted: the
machine can make coffee.
When the manometer shows 1.2bar pressure, the buttons « steam SC », « hot water » and
« steam (On / Off)» are lighted, all the functions can now be used.
4.2 Next filling
The TWIN STAR 2 EVOLUTION will manage the automatic filling of the boilers as long hot
water is drawn (water level sensor maximum).
♦ STANDARD PRESSURE - PRESSURE GAUGE:
The steam boiler pressure has been adjusted in the factory between 0.9 and 1.2 bars.
An overheating thermostat will interrupt the boiler heating as soon as the temperature is
increasing abnormally.
THE MACHINE IS READY FOR OPERATION.
CONTI
BBBBBBBB
CONTI HH:mm
AAAAAAAA
Filling
In progress
1°filling
press Enter
1°filling
in progress
Exit from prog
Set on

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5 DESCRIPTION OF OPERATING DEVICES
5.1 Steam tap
Two steams taps operating with levers “V” heat liquids or froth milk for cappuccino by injecting
steam.
The liquid container should be high enough. The steam wand nozzle should soak into the liquid
but not touch the bottom.
5.2 Hot water tap
The electric tap “E” is made to prepare hot water specialties (tea, grog...).
The hot water temperature can be adjusted thanks to a mixer system. The volume of hot water
can also be adjusted via the programming mode.
5.3 Filters
The machine is supplied with 1-cup and 2-cup filters. Always ensure that the filters are
unclogged and clean. To remove used coffee grounds from the filter, turn the filter holder
upside-down and lightly tap it on the edge of a wooden box.
5.4 Dummy filter
The machine is delivered with a dummy filter. This component is only used for the daily cleaning
of the coffee groups.
5.5 Filter- holders
Never take the filter-holder off when the unit is operating, firstly, ensure that the fluid has
stopped flowing from the filter-holder outlet.
Always leave the filter-holders on the machine with the filters filled with the coffee grounds of the
previous coffee in order to maintain the temperature of the filter-holders.
When the machine is not in use for an expended period of time, remove the filter-holders and
expel the used coffee grounds.

8
5.6 Steam jet (option)
This kit allows to heat a liquid automatically in programming the steam temperature. The
temperature sensor in the steam wand detects the temperature required and the steam stops
automatically.
5.7 Espresso tray
Supplied with all Mug versions, this device allows to place espresso cups in a higher position.
5.8 Water hardness tester
Supplied with the machine to check the water hardness of the main water supply. The units
indicated on the tester are °dh (or °Gh, German uni t). The hardness water which goes into the
coffee machine must be < 5.6°dh.

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6 FUNCTIONING & PROGRAMMING
6.1 Automatic switching ON & OFF
6.1.1 The Twin Star is connected to the main electrical supply: :
When switching on, the machine is getting back to the same state when it was switched off.
During 5 seconds the display indicates:
6.1.2 The machine is switched off:
When the machine is switched off
All the LED’s are off, all the outlets are off.
All the functions are off except the programming of the main board.
The display indicates “OFF” and the time is shown on the display of the left group.
6.1.3 The machine is switched on:
The displays are lit and indicate: “CONTI”, the current time and the name of each group.
The water supply solenoid valve is activated.
The water level regulation of the steam boiler is activated.
When the safety sensor is reached (probe SS in contact with water):
The security relay is activated.
When the level sensor is reached (sensor SN in contact with water):
The heating elements of all the boilers (coffee & steam) are heating.
When the required temperature of the coffee boiler is reached:
All the LED’s of the group are lit, and the automatic bleeding system is activated then all
the functions of the group are operating.
6.1.4 Automatic Switching On & Off:
The automatic switching on & off of the machine could be programmed for every day of the
week: The main electrical supply must be switched on.
The timetable is programmed in advance.
A day off could be set.
The automatic switching on & off could be deactivated (see programming)
The machine can always be turned ON and OFF with the ON/OFF button.
OFFOFF HH:mm
CONTI
Roaster name
CONTI HH:mm
Roaster name
Twin star 2
Rev. 1.04

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6.2 Programming
6.2.1 Programming of coffee measures:
To get into the programming mode:
 Insert and turn the programming key. The displays indicate
Press the right push-button (Continuous) of the group to program.
- Programming the left group will also program the other groups.
- Programming the other groups will program each group individually.
Put coffee ground in the filter holder before adjusting the dose .
The LED of the selected push-button blinks: PROGRAMMING MODE
Start the programming within 5 seconds (otherwise the machine will get out of the
programming mode).
Select the measure to be programmed by pressing the relevant button:
- All the LEDs of the group will go off,
only the LED of the selected measure will remain alight.
- The LED of the button CONT blinks.
- The pump and the solenoid valve of the related group are activated.
- The water is flowing. Once the required measure is reached, press the button again to stop
the flow.
- The data is stored.
The PROGRAMMING MODE will remain for 5 seconds (the right LEDs are blinking).
Continue the same procedure for the other measures of the group.
NOTES:
 Never forger to put coffee ground in the filter holder before adjusting the dose.
 During the PROGRAMMING MODE the LEDs of the already programmed push-buttons go off.
Water volume
Programming
Parameters
Programming

11
 Each group could be programmed individually: press the continuous flow button on the right of
each group.
 Maximum flow time of the coffee measures: 3 minutes. Wait for 5 seconds to go out of the
programming mode before making coffees.
 During the programming of one group, the other groups do not work (including the hot water).
 The data are stored even if the machine is switched off.
6.2.2 Programming of tea measure :
 Insert and turn the programming key. The displays indicate:
 Press the push-button continuous flow (of the left group).
 The LED of the button blinks: PROGRAMMING MODE.
 Press the HOT WATER button to program: the hot water solenoid valve is activated.
 When the hot water measure is reached, press the hot water button again to stop the flow.
 The data is stored.
NOTES:
 If the user don’t stop the hot water flow, the machine will automatically close the solenoid
valve after 120 seconds.
 Wait for 5 seconds to go out of the programming mode before starting the flow.
 The data are stored even if the machine is switched off.
6.3 Beverage preparation
6.3.1 Coffee delivery:
The machine has to be switched on and the security water level in the steam boiler reached
(sensor SS).
Machine switched on and no delivery: all the LEDs are lit.
Press the push-button to deliver the programmed coffee measure (each push-button could be
programmed with a different measure – see PROGRAMMING MODE).
To stop the coffee flow press one of the 5 push-buttons of the operating group.
Press the selected push-button:
- The pump and the solenoid valve of the group are activated.
- The LED of the selected button is lit, the other LEDs of the group are turned off.
- The LEDs of the other groups are lit.
The flow meter detects the volume of water. When the programmed quantity is reached
- the flow stops automatically,
- the pump and the solenoid valve of the group are deactivated.
- the LEDs of the group are lit.
All the groups on the machine can be used at the same time.
If one of the groups has been deactivated in the Bar menu, all the LEDs of this group will stay off.
If the left group is deactivated, all the LEDs of this group stay off.
Water volume
Programming
Parameters
Programming
Parameters
Programming

12
The coffee will not flow, if
- Time Out of the heating element (coffee boiler - alarm on the display),
- Overheating of the coffee boiler heating element (alarm on the display),
- Time Out for steam boiler filling up,
- The security sensor is not reached (lack of water in steam boiler).
When the coffee is flowing, the display of the operating group shows (according to the selection):
6.3.2 Coffee delivery:
This function allows to moisten the coffee grind before infusion (opening of the solenoid valve
time t1, deactivating time t2 and reopening).
The pre-infusion is set in the factory and can be modified and set different on each button of the
group – see programming.
6.3.3 Tea measure:
Machine turned on, no tea delivery: The tea LED will stay alight.
Press the tea push-button:
- The tea solenoid valve is activated and the hot water is flowing.
- The LED of the push-button is lit.
The TEA delivery can be programmed. When the programmed time is reached the TEA
solenoid valve is closed and the hot water flow stopped.
The flow can be stopped before the end of the program by pressing the TEA button again.
The TEA and COFFEE functions can be used in the same time.
During the hot water delivery the display of the left group shows:
When coffee & tea are delivered in the same time on the left group, the display will show the
information alternately.
When the programmed time is reached, the solenoid valve will close.
6.3.4 Tea with pump:
The anti-splash system of the hot water outlet can be adjusted using the pump and the tea
solenoid valve in the same time – see technical menu.
1 Espresso
in Progress
2 Espresso
in Progress
1 Long dose
in Progress
2
Long doses
in Progress
Continuous dose
in Progress
Tea
in Progress

13
6.3.5 Jet Steam SC (steam control) and steam on / off functions: (in option)
« Steam SC » and « Steam (On / Off) » buttons are enabled when the machine is on and the
steam boiler security level is reached (SS probe in contact with water). The machine only
requires a complete water level when turned on (SN probe in contact with water) to allow steam
distribution through the solenoid valves.
When the machine is ready to be used (boiler pressure = 1.2bar), the buttons « Steam SC »
and « Steam (On / Off)» are lighted.
Steam SC Steam On / Off
6.3.6 Jet steam SC
Pour the cold milk in the jug (preferently up to the middle) and insert it under the « jet
steam SC » (see picture below).
Pressing « Steam SC » (steam Control), activates the steam solenoid valve to warm up the milk.
The button « Steam SC » is lighted during the milk warming up.
When the programmed temperature is reached, the jet steam stops.
Nota:  You can stop the jet steam by pressing the jet steam button « Steam SC » .
 When installing the machine, check if the programmed temperature is OK.
Otherwise ask to your technician to adjust it according to your choice.
 If the programmed temperature is not reached, steam stops after 60 seconds.

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6.4 Others functions
6.4.1 Safety level of steam boiler:
The water level is controlled by the sensor SS.
The sensor (SS) is not activated when the machine is OFF.
When the machine is ON and if the sensor does not detect the presence of water within 1 sec:
an alarm is activated,
the machine will turn off automatically and the left display will show:
To suppress this alarm, the machine must be turned off and on again.
Remark: If the machine is turned on with the steam boiler empty, the automatic water filling will
start without activating the alarm. If the boiler fails to fill, the filling Time Out (sensor SN) will
activate the alarm again. Check if the inlet solenoid valve EE isn’t clogged and check the good
functioning of its coil.
6.4.2 Automatic filling up of the steam boiler:
The water level of the steam boiler is controlled by the level sensor SN.
When the sensor does not detect the presence of water within the time T ON, the solenoid valve
of the water supply EE will be activated.
When the sensor detects the presence of water within the time T OFF, the solenoid valve of the
water supply EE will be deactivated.
Both times, T ON and T OFF can be adjusted in the programming mode.
While the steam boiler is filling up, the left display will show:
The steam boiler can be filled up using the pump MP and the solenoid valve EE simultaneously -
see programming mode.
6.4.3 Automatic daily bleeding process:
When you turn on the machine (ON/OFF button). The coffee boilers bleeding process
automaticaly starts when you turn on the machine (ON/OFF button).
The machine starts as the TwinStar2 (steam boiler filling then coffee boilers heating).
When a coffee boiler reaches the programed temperature:
Group i PUMP + BLEEDING EV i activaded for 6 seconds.
PUMP activated for 8 seconds.
Group i lighted
Group i ready to make coffee
If the group is disabled in the technical menu, the group remains OFF.
Filling up
In Progress
Steam boiler
empty

15
6.4.4 Cleaning function :
A cleaning cycle can be carried out independently on each group and at any time, otherwise
and after 500 coffee are produced on a group, the corresponding display will show:
Insert a blind filter with a cleaning tablet into one of the filter holders and install it on the group
where the message is shown.
To start the cleaning cycle and suppress the message, press during 2 sec the 5th push-button
(Continuous key) of the group where the message is shown.
The pump and the group solenoid valve are 2 sec ON, 1 sec OFF, repetition 15 times.
During the cleaning cycle the display will indicate:
When the 15 times rinsing cycle are finished, the display will indicate:
Remove the filter holders and evacuate the coffee ground which remind in the dummy filter.
Put the filter holder on the group again then press the 5th push-button (Continuous key).
The rinsing cycle start. The pump and the group solenoid valve are 2 sec ON, 1 sec OFF,
repetition 15 times. During the Rinsing cycle the display will indicate:
When the rinse cycle is finished, the display will return to the standard mode and the coffee
counter of the group will go back to zero.
Remarks:
- The coffee counter: each push-button is worth 1 unit, the Continuous button has no value.
- The cleaning cycle can be activated before the message appears on the display.
- While a group is being cleaned, the others groups will work normally.
- All groups can be cleaned at the same time.
- The cycle can be stopped by pressing one of the five push-buttons of the group.
Please Rinse
Washing
in Progress
Rinse
Rinsing
in Progress

16
6.4.5 "Coffee credit":
This function enables coffee roasters to program the machine for a limited coffee delivery.
It can be activated and deactivated. The coffee roaster has access to the programming mode
with an allocated password.
The coffee roaster can program the number of coffee shots to deliver according to the quantity
of coffee beans sold.
A value is attributed to each push-button – value adjusted in the programming mode. The
programmed credit decreases as and when the coffee is delivered.
A credit running out information can be programmed with a message on the display to inform
the user about the quantity of coffees left to allow him to contact the roaster before the machine
will be blocked.
The displays show:
When the programmed quantity of coffee shots were delivered:
The coffee push-buttons are deactivated, the LEDs go off.
The CAPPU push-button is deactivated, the LED goes off.
Only hot water and steam can be drawn.
The displays show:
6.4.6 Data reset:
This function allows to program the standard parameters again when they were lost.
Procedure:
- Turn off the main electrical supply (remove the plug) of the machine.
- Press simultaneously the left push-button of the left group and the tea push-button.
- Turn on the machine (while pressing both buttons).
When the LEDs of the ‘continuous’ push-buttons of all groups are blinking the data is
programmed.
Turn off the main electrical and then reconnect the machine again to return to the standard
functioning.
Remark: the following data will not be modified after the execution of this procedure:
_ Factory set parameters. _ Language.
_ Roaster set parameters. _ Tea/ hot water settings.
_ Counter of delivered shots. _ Roaster’s name.
_ Time. _ Passwords.
Coffee credit
Outrunning
Coffee
credit
Outrunning
Coffee credit
Outrunning
Coffee credit
Exhausted
Coffee credit
Exhausted
Coffee credit
Exhausted

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6.5 Alarms
6.5.1 Time-out filling of steam boiler filling:
If the filling of the steam boiler (sensor SN covered) exceeds the set time (

see programming
mode), the filling is stopped.
The machine will turn off automatically and all the leds will blink. The left display will show:
To suppress this alarm switch on the machine (ON/OFF).
6.5.2 Error flow meter:
When during a coffee cycle the pulsations of the flow meter are absent for more than 6 sec., the
LED of the pushed button will blink and the display of the group will indicate:
However, the functioning of the group will continue.
If the pulsations come back, the alarm will be deleted and the coffee cycle will finish.
If the absence of pulsation remains for 180 sec, the coffee delivery will be stopped and the
alarm suppressed. Check the good functioning of the flow meter of the group where the
message appears.
6.5.3 Coffee boiler over-heating:
If the water temperature in a coffee boiler rises above 140°C / 284 °F:
- All the LEDs of the group will blink.
- The heating of the coffee boiler will be stopped.
- The push-buttons of the group will be deactivated.
- The display of the group will indicate:
The alarm will disappear when the temperature decreases 2°C under 140°C/ 284°F.
_ Check the good functioning of the state relay which supply the heating element of the
defective group.
_ Check the good functioning of the temperature sensor of the defective group.
6.5.4 Steam boiler over-heating:
Overheating thermostats monitors the maximum temperature allowed in the steam boiler and in
the coffee boiler. When the maximum temperature is reached the overheating thermostat will
deactivate the security relay, the auxiliary contact STR will open.
- The LEDs of the TEA and CAPPU push-buttons will blink
- The heating and push-buttons are deactivated
- The display of the left group will show:
Flowmeter
Alarm
Group Boiler
Temperature
Klixon
Opened
Alarm
Filling up

18
6.5.5 Time out coffee boiler heating:
If a coffee temperature sensor is disconnected, the same procedure as for the overheating has
to be applied. The display of the defective group will show:
The alarm will be activated even if the group is deactivated.
To delete the alarm switch the machine off and on (ON/OFF); if the message appears again :
_ Check the good functioning of the state relay which supply the heating element of the
defective group.
6.5.6 Coffee temperature sensor disconnected:
If a coffee temperature sensor is disconnected, the same procedure as for the Overheating has
to be applied. The display of the defective group will show:
To remove this alarm, switch off then on the machine.
6.5.7 Steam boiler temperature sensor disconnected:
If the temperature sensor of steam boiler is disconnected, the display will show :
To remove this alarm, switch off then on the machine.
6.5.8 Steam control system temperature sensor disconnected:
If the steam control temperature sensor is disconnected:
- The LED of the steam push-button will blink
- The display of the first group will show:
The steam push-button is still functioning but the steam control system is deactivated. The
steam push-button must be pressed again to stop the steam delivery..
The 5
th
key of the last group became automatically “continuous flow key” for coffee and cannot
be used for steam application.
6.5.9 Overheating in steam boiler:
An alarm appears if the temperature sensor detect more than 140°C in the steam boiler.
6.5.10 Regeneration of water softener:
When a certain quantity of water has been used the LED of the CAPPU push-button will blink
and the left display will show:
Group Boiler
Heating
Coffee Temp probe
Not connected
Steam control
not connected
Filter
regeneration
Overheating
Steam boiler
disconnected
Steam boiler probe
Not connected