Necta Colibri User manual

AFTER-SALES SERVICE Hot & Cold
SERVICE MANUAL
“COLIBRÌ”
BASIC TECHNICAL MANUAL
THE CONTENTS OF THIS DOCUMENT ARE INTENDED FOR NECTA’S AFTER SALES PERSONNEL

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
Service Manual: Colibrì Edition 02-2002 2 /25
NOTE
The above systems and functional units are specific to this machine.
All functional units installed but not listed in this document, are also used in other machines in the same range;
therefore they will be described in a separate manual for machines belonging to the same range, where all base
functional units will be described more in detail.
View of Colibrì with the door open
TABLE OF CONTENTS
1
2
3
4
5
6
7
8
9
10
11
12
Layout
Electrical systems, connections and configuration
Air-break / Boilers
Pumps and by-pass
Coffee brewer unit
Stirrer dispensing unit
Cup dispenser assembly
Doser devices and powder product containers
Mixer unit
Powder and water dose tables
Trouble-shooting
Wiring diagrams
HACCP directive (Use instructions)
Daily cleaning and hygiene
Weekly / monthly cleaning and hygiene
Page 3/4
Page 5-10
Page 11-13
Page 13
Page 14
Page 15
Page 16
Page 17
Page 17
Page 18
Page 19-20
Page 21
Page 22
Page 23
Page 24/25
1
3
6 7
2
5
8
1 - Cup dispenser
2 - Liquid waste tray
3 - Sugar and stirrer release
4 - Brewer unit
5 - Coffee container
6 - Safety microswitch
7 - RH Auto mechanical safety pin
7A LH Auto mechanical safety pin
8 - Coffee doser and release unit
9 – cup support swinging arm
4
7
A
Note: The mechanical safety pins ( 7 + 7 A )
have the function of preventing the opening
of the upper container lids with the door
closed.
In the espresso version only the right safety
device is present
In the Instant version both left and right
safety devices are present.
9

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
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1 - HYDRAULIC LAYOUT
List of hydraulic components
1) Water inlet solenoid valve
2) Air-break
3) Volumetric counter
4) Pump
5) Pump by-pass (complete with check valve)
6) Pressure boiler (complete with solenoid valve)
7) Brewing unit
HYDRAULIC LAYOUT - “ESPRESSO” VERSION

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List of hydraulic components
1) Water inlet solenoid valve
2) Air-break
3) Volumetric counter
4) Pump
5) Pump by-pass (complete with check valve)
6) Pressure boiler (complete with solenoid valve)
NOTE:
The same ESPRESSO boiler and pump are used in both the espresso and instant versions, but with a different solenoid valve assembly,
composed of three 2-way valves, while the espresso boiler solenoid assembly is composed of two 2-way valves and one 3-way valve
The configuration is via Software. (See procedures in the software manual)
In both versions the dose of liquids is calculated by means of the volumetric counter
HYDRAULIC LAYOUT
“
INSTANT” VERSION

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
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2 - ELECTRICAL SYSTEMS - CONNECTIONS - CONFIGURATIONS
The machine is designed to operate under a single-phase voltage of 230 V AC (+5-10V)
It is protected with a main 10 A fuse on both phases.
With regard to the transformer:
The primary winding is protected with a 125 mA fuse
The secondary winding is protected with a 1.25 mA fuse
The machine is fitted with a door opening safety switch.
The power cable can be supplied as a standard feature and chosen among the following types:
HO5 RN – F copper with a 3 x 1.5 mm2section
HO5 V V – F ,, ,, ,, ,,
HO5 V V – F ,, ,, ,, ,,
Fitted with a fixed SCHUKO plug.
NOTE: For UK there is a specific plug conforming to the standards in force, which is adopted for that specific
market.
In the event of replacement cables of exactly the same characteristics must be used.
Since the “Colibrì” vending machine is approved by an electrical safety certification institute (IMQ),
replacements with non-original components are not permitted.
Otherwise the electrical safety certificate and the warranty will be void.
2.1 - ELECTRONIC BOARDS CONNECTIONS
Electrical and board connections: Back view without protective casing
Power supply
cable connector
10 A line fuses
T
ransformer fuses
Push-button
wiring connector
A
ctuation rela
y
CPU and
actuation board

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BOARD CONNECTION DIAGRAM
NOTE:
The RS232 serial board for communication protocols can be supplied on request. SERIAL payment systems can
be connected to such board, using the following protocols: Executive - MDB - BDV
As standard feature the vending machine is factory fitted exclusively for the parallel communication payment
systems (12 V front validators)
Code Description
SM Actuation and control board
LCD LCD display card
NTC Temperature control probe
CV Volumetric counter
RS 232
Printer or data reading device port (only if the relevant optional board is installed)
SP Push-button board
IVB Cup sensor switch
IVA Water sensor (level) switch (air-break)
IPF Liquid waste overflow switch (previsions for a model with a support cabinet)
CMSB Cup release motor cam

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ACTUATION AND CPU CONTROL BOARD
Board components legend
N. Description
1 Connector for 230 V users
2 RAM
3 EPROM
4 Connector for input signals
5 (DL2) GREEN LED (blinking during normal operation)
6 Connector not used
7 Connector for push-button board
8 Expansion boards for payment system protocols (optional); as standard feature the CPU
board controls exclusively parallel-type payments systems
9 Trimmer for boiler temperature control
The boiler temperature is factory adjusted for optimum operation and must not be
changed. In the event of the probe being replaced, the temperature needs to be
readjusted, keeping in mind that the temperature increases by tightening and decreases by
loosening, and each complete turn corresponds to a change of 0.5 °C
10 (DL2) YELLOW LED (Correct power supply to the board)
11 Board power supply connector
12 (DL2) RED LED - When starting the machine it indicates that boiler heating element is
working)
13 TRIAC - boiler heating element actuation
14 Boiler heating element connector
15 Connector for 230 V AC users
16 Relay for actuations (K1 - K15, see separate list page 8)

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REFERENCE TO RELAY CODE AND ACTUATIONS - ESPRESSO / INSTANT VERSION
Espresso Configuration Instant Configuration
RELAY
CODE Application RELAY CODE Application
K 01 Three-way solenoid valve for
Espresso coffee K 01 Solenoid valve 3
K 02 Coffee release magnet K 02 Doser device 3
K 03 Coffee grinder motor K 03 Whipper 2
K 04 Pump K 04 Pump
K 05 Coffee brewer motor K 05 Doser device 4
K 06 Solenoid valve 2 K 06 Solenoid valve 2
K 07 Solenoid valve 1 K 07 Solenoid valve 1
K 08 Whipper 1 K 08 Whipper 1
K 09 Sugar doser device K 09 Sugar doser device
K 10 Doser device 2 K 10 Doser device 2
K 11 Doser device 1 K 11 Doser device 1
K 12 Water inlet solenoid valve K 12 Water inlet solenoid valve
K 13 Cup stacker shift ratiomotor K 13 Cup stacker shift ratiomotor
K 14 Cup release ratiomotor K 14 Cup release ratiomotor
K 15 Stirrer dispensing motor K 15 Stirrer dispensing motor
The control board can be configured for the different machine versions only via software settings.
See Software and Programming chapter

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
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MACHINE CONTROL BOARD CONFIGURATION
Three electronic boards are installed.
1) The CPU control board, located at the back of the machine, processes the information from the push-
buttons, the payment system and from the sensors installed throughout the machine; it also controls the
actuations and the push-button board. It is built on SMT technology.
NB: SMT = acronym for: Surface Mount Technology (some electronic components that are smaller than the
standard which can be surface mounted, takes little space, works with precision and reduced problems from
electromagnetic disturbance.
2) The push-button board, located on the inside of the door, controls the alphanumeric display and it
processes the push-button commands; it also supports the coin mechanism connectors and the RS232
printer port.
3) The display board processes the information and converts it into readable signals.
The board power (15 VAC) is supplied through the transformer, which is protected with two fuses:
125 mA T on the primary winding
1.25 mA T on the secondary winding
The CONTROL BOARD is also fitted with three coloured LEDs to indicate the different functions.
GREEN LED N. 5: it blinks during normal operation and indicates that the microprocessor functions correctly.
YELLOW LED N.10: it glows when there is a 12 V DC power supply to the board
RED LED N. 12: it glows when the boiler heating element starts
NOTE
The board also controls the payment system; however, as standard feature only a parallel type communication
system is controlled.
Three separate cards to be inserted into connector N. 8 are available, controlling the payment system protocols,
and namely: Executive - MDB - BDV
These cards are available as “optional” features, assuming that for the specific range of the Colibrì vending
machine normally a parallel communication system with front validators is used.
Wiring connection diagram for payment systems with the different protocols

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
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LAYOUT AND CONNECTIONS
Push-button board viewed from the component side
Ref Description
1 Front validator connector
2 Free connector (not used)
3 CPU control board connector
4 Service buttons connector
5 Display board connector
6 LCD contrast adjustment trimmer
7 Programming mode button
8 Washing cycle button
9 RS 232 port (Optional and only active if a serial card is installed)
10 Programmer device connector
11 Push-button board connector
5
2
3
1
4
6
10
9
7
8

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
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3 - AIR-BREAK / BOILERS
Its function is to keep the water level constant and to signal a water flow interruption from the mains; in the
event of such water failure the current selection can be completed.
In addition, it serves the purpose of holding a reservoir of water at normal atmospheric pressure, so that the
pump can draw the correct water dose for the selection and deliver it to the Espresso boiler without changes in
pressure that may affect the volumetric counter reading.
The dose is measured by means of the volumetric counter.
The water level is ensured by a float that triggers a microswitch, keeping the level between a factory set
minimum and maximum (it is very important not to replace the microswitch with one of different mechanical
characteristics, as a variety of malfunctions may occur).
Furthermore, in the event of failure to the maximum level microswitch, an overflow hole allows the water to be
conveyed through a tube and to the safety device fitted on the water inlet solenoid valve, thus causing its
mechanical lock (such safety device is triggered also in the event of a power failure).
The air-break also causes a signal to be sent to the machine control board necessary for the initial installation
and for filling with water that anyway needs to be done manually.
If upon switching the machine on, the float does not trigger the maximum level microswitch within a set time
(e.g. 60 sec.) the vending machine locks due to a water failure.
Back view without protective casing
Air-break level control microswitch
Air-break
Overflow tube
Water inlet solenoid tube
Mains water inlet solenoid valve

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3.1 - BOILERS
The Colibri model is fitted with only one boiler of the pressure type, used in both the Espresso (mixed
solenoid valve assembly with two 2-way valves and one 3-way valve) and Instant versions; however this latter
version is fitted with three 2-way valves.
The basic espresso boiler is the same used in the Brio, Venezia etc., but the application is different; it is
pre-assembled as a functional unit on a support, complete with all functions and easily removable. For
information on all other features refer to the functional unit manual.
Back view of boiler detail
Bipolar safety
thermostat
Reset button
2/3-way solenoid
valve block
Instant version boiler
Using a complete block with three 2-
way solenoid valves
1 - For hot water
2 - For instant prod. 1
3 - For instant prod. 2
NOTE:
The difference between 2-way
and 3-way solenoid valves is:
1) 2-way: when activated it connects
inlet (first way) with outlet (second
way).
2) 3-way: when first activated it
connects inlet (1) with outlet
(2), when deactivated it
closes the second way and
opens the third way,
connected to the second way.
3) Excess liquid from brewing is
discharged through the third
way.
Pressure boiler
module
NTC Probe
Module screws

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The internal temperature control is by means of an NTC type electronic probe fitted with an internal 12K ohm
(+/- 4 ohm) resistance at a temperature of 25° C.
As the internal temperature increases the resistance is reduced progressively as indicated in the following table.
Boiler temperature C° Value in ohm Allowable tolerance
0 35875 +/-7 ohm
25 12000 +/-4 ohm
50 2900 ,,
85 1475 ,,
90 1260 ,,
100 963 ,,
4 - PUMPS AND BY-PASS
Detail boiler module - pump end
T
he same pump used in the Brio is used to
supply the boiler.
T
he difference bein
g
in the application, as
pump, boiler and connections are positioned on
an easy-to-remove bracket (see photo); this
way full access is ensured for maintenance and
hygiene.
T
he pump has overheating protection in case of
continuous or dry operation by means of a 90°
C self-resetting klixon.
T
he b
y
-pass is factory pre-set at 12 bars.
T
he pump is activated by relay K 14.
KLIXON
Overheatin
g
protection
B
y
-
p
ass

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5 - ESPRESSO COFFEE BREWER UNIT
The well known and reliable Z 2000 M unit is used, but with some changes to make it more suitable and with
simpler operation, to take into account the Colibrì characteristics.
The main differences between the coffee brewer and the standard Z 2000 unit are as follows:
1) No unit detection microswitch. This solution was adopted to make the wiring simpler and therefore
eliminate the remote possibility of malfunctions due to false contacts.
2) Using only one dead centre positioning microswitch. More specifically the upper dead centre position
microswitch was eliminated (piston fully open) and such position is determined by the SW that
calculates the time taken by the ratiomotor to reach the upper dead centre after triggering the lower
dead centre microswitch (brewing position). Tests showed that the time to travel the distance is
consistent and does not change much because of the type of motor used.
3) In the event of failure to the microswitch installed, a time-out device disables the motor.
4) As an optional feature a kit for heating the first selection coffee is available (see kit description).
The unit is factory set to accommodate a patented first coffee KIT, based on the use of a very low power
consumption heater of the NTC type and a built-in thermostat (see separate description).
After a long pause the first espresso coffee could be of a slightly lower temperature than the optimum one.
The Kit (ref. 7) ensures optimum temperature in the brewing chamber, without altering the taste as it happens
in currently marketed systems (burnt taste).
Espresso coffee brewer detail
Positioned at the upper dead centre
Ready for loading ground coffee
T
he unit is factory fitted for the installation of
a first coffee heater kit, see drawing.

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6 - STIRRER DISPENSING UNIT
It is a functional unit developed from the one already used in the Brio but with considerable innovations.
The new feature consists in the option of using three different size stirrers:
95 mm - 105 mm - and 115 mm stirrers
With a total capacity of 170 stirrers.
To adjust to the desired length it is sufficient to move the adapter profile inside the guide and place it in the
preset position for the new size.
Operation: The release ratiomotor is triggered by relay K 24 and the sugar release spout is rotated at the same
time as the stirrer release system is activated.
N. Description
1 Stirrer dispensing unit fastener
2 Lock
3 Stirrer length adjustment slots
4 Door switch
5 Stirrer positioning weight

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7 - CUP DISPENSER ASSEMBLY
It is a new functional unit, provided with the functions of
containing, releasing and positioning the cups.
Such feature is exclusive and patented.
The unit is composed of a cup holder turret with four columns with
a capacity of approximately 175 cups.
The turret is rotated by a 230 V 50 Hz synchronous ratiomotor
positioned in the same unit and activated by relay K 13. To make
cup loading easier the turret can be tilted and to achieve this it
needs to be lifted slightly and then pulled forward.
The system has an international patent.
The system operates as follows:
When a selection is made, relay K14 activates the cup release
ratiomotor (14) that rotates cam (16) clockwise, also driving pinion
(18) that connects the toothed rim of ring (22) by means of an idler
wheel.
When rotating, the ring also rotates the four worm gears (24) which
due to their special profile (snail) cause a cup to be released and
hold the other cups above.
The cup falls into the holding and shifting (32).
When the cam (16) rotates driven by the motor, it controls the
lever (36), as a consequence the fork (32) moves away from
the idle (starting) position until it reaches the cup release
position (Fig. 3).
It stays in such position long enough to receive the cup.
Then, completing the ratiomotor rotation, the fork brings the
cup into drink dispensing position (Fig. 2).
It remains in this position until a new selection is made.
Such position is determined by the microswitch (40) that also
gives the dispensing consent.
The fork is retained against the cam by a torsion spring, that
also allows manual movement of the fork to place a jug in the
dispensing compartment and an automatic return after the jug
is removed.
Fi
g
. 3 in stand-b
y
Cup loading
column
Cup dispenser
with cup shift
Support and cup shift arm
Fig. 1 CROSS SECTION
Fig. 2
shifting cup into dispensing position

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8 - DOSER DEVICES AND POWDER PRODUCT CONTAINERS
Due to the compact size of the Colibrì new powder ratiomotors needed to be designed, with quick fastening without any
screws, to allow easy access for maintenance.
9 - MIXER UNIT
Apart from their application, the mixer is the usual excellent and reliable
ones used in the entire Necta production.
A mixer must have two main features:
1) Ease of disassembly and limited number of components to be able to
meet the HACCP directive.
2) The quality of dispensed products that must have as much as
possible the appearance of products served at the bar.
The motors are special high rotation speed commutator motors powered
with 230 V AC and fitted with interference suppressors and reset-able
overheat protections.
The motors are activated by relay K 08 (Espresso version) K 03
(Instant version)
T
he
p
owder and bean container module is a sin
g
le unit
comprising all containers needed for the machine (1 for
coffee beans and 2 for soluble powders.
For removal, the front door must be opened, as for
safety reasons a special auto mechanical safety pin
prevents the unit from being opened with the door
closed.
Connection with the ratiomotors, vertically, is automatic.
T
here are 4 containers in the instant version.
T
he ratiomotors are of the induction t
yp
e
(
without
brushes) powered with 230 V AC 80 W and protected
from overheating by a an auto-reset klixon.
T
he ratiomotors are activated b
y
rela
y
s K10 and K11
(Espresso ) and by relays K01, K2, K3,K5 (Instant)
Container unit bein
g
removed
Ratiomotor vertical connection
RH auto mechanical
safety pin

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10 - POWDER AND LIQUID DOSE TABLES
FACTORY “DEFAULT” SETTINGS
Selection Notes Coffee
beans Instant
Coffee
Water
c.c. Powder g Sugar g Notes
Short coffee
Espresso
Time
Quantity
2 sec.
7 g
- - 35 sec.
60 cdv
40
- - 7.5 g
CDV =
Flow-meter
pulses
Long coffee Time
Quantity
2 sec.
7 g
- - 38 sec.
95 cdv
60
- - 7.5 g
Coffee with milk Time
Quantity
2 sec.
7 g
- -
38 sec.
60 + 35 cdv
40+25 c.c.
- -
2.0 g of milk
7.5 g
Cappuccino Time
Quantity
2 sec.
7 g
- -
45 sec.
60 + 72 cdv
40+55
6.0 g of milk
7.5 g
Instant coffee
(Instant version)
Time
Quantity
--
1.3 g 22 sec.
55 cdv
40 c.c.
- -
7.5 g
Instant coffee
Long
Time
Quantity
--
1.3 g 23 sec.
72 cdv
55 c.c.
- -
7.5 g
Instant coffee with
milk
Time
Quantity
--
1.3 g 27 sec.
55 + 35 cdv
40 + 25 c.c. 2.0 g of milk
7.5 g
Cappuccino
Instant
Time
Quantity
--
1.3 g 31 sec.
55 + 72 cdv
40-+55 c.c. 6.0 g of milk
7.5 g
Chocolate
Strong chocolate
Time
Quantity
--
--
32 sec.
116 cdv
90 c.c.
23 g
27 g
--
Instant tea
(Optional)
Time
Quantity
--
--
32 sec.
116 cdv
90 c.c. 12.5 g
--
Milk Time
Quantity
- -
- - 32 sec.
116 cdv
90 c.c.
8 g
7.5 g
NOTE 1
The water flow in the mixers is approximately 10 c.c. per second and it is given as an indication, as there are
many variables that can affect the accuracy.
The liquid dose is determined by counting the flow-meter pulses (cdv).
Both versions (Instant and Espresso) use an electromechanical vibration pump (with the espresso boiler) for the
water flow; therefore the liquid dose in both versions is measured in cdv (flow-meter pulses).
NOTE 2
To be noted that the number of pulses does not change in a linear manner (i.e. double the amount of water
does not correspond to double the number of pulses), however the counter varies the accuracy according to the
water flow velocity, and namely:
For espresso coffee it is slowed considerably because of the coffee compress reaction that slows down the
water flow, while it is accelerated in the instant drinks selections, since there are no obstructions to the water
flow. Therefore, in the event of changing the default doses set at the factory, some measurements must be
made using graduated measuring containers to check the accuracy of the doses.

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11 - TROUBLE-SHOOTING
Problem
(And/or indication on the display) Possible cause Solution
The machine does not go
into the boiler heating
phase, remaining in the
“installation” phase
No water flow from the
mains or insufficient pressure
(5-85 N/cm2)
(0,5-8,5 bar)
The air-break microswitch is
faulty
Water inlet solenoid valve
locked by the overflow tube
and activated b
y
the relevant
relay
Check for the presence of one or more of the situations
indicated and once identifying the cause do as follows:
Short-circuit the microswitch to check it’s functioning
Unlock the water inlet valve, undoing the threaded ring and
emptying the overflow tube
Check for 230 V AC voltage at the solenoid valve power
supply ends
Check the activation of relay K 12
The display indicates the
message
“No coffee”
The grinder motor is locked
because there is no coffee
The grinder wheels are
locked because of foreign
matter in the coffee
Grinder motor overheating
device triggered
The coffee container shutter
was not opened
When an espresso coffee selection is made the grinder is
activated conveying coffee to the doser device, the motor
lock is activated by the microswitch, which is triggered when
the set dose is reached. If such microswitch is not triggered,
the system disables all espresso coffee selections, indicating
the message “No coffee” on the display, once identifying the
cause:
Check the wear of the brushes
Free the grinder wheels with the utmost care, as blocked
wheels could have triggered the overheating protection,
which is reset-able. Open the shutter, add coffee
The display indicates the
message
“Coffee release failure”
Failure to the release magnet
Failure to the coffee dose
microswitch<0}
Failure to relay K 02
After grinding and during the attempt of releasin
g
the
g
round
coffee, the doser device plate triggers a microswitch that
signals the coffee release
If such microswitch is not triggered, there could have been
two causes:
Failure to the release magnet or overheating protection
triggered (resetting is automatic, and after approximately 5
minutes it is reactivated, but the cause of such trigger must
be identified).
Failure to the microswitch: replace with an identical one
designed for the Colibrì, in the event of using a microswitch
with different characteristics considerable discre
p
ancies in the
ground coffee doses may occur.
The display indicates the
message
“Boiler failure”
The boiler does not heat
Dry operation protection
system triggered.
The machine is locked if after 10 minutes heating the set
temperature is not reached.
Check for the correct operation of the heating element, the
thermostat, the probe and of the actuation triac.
In the event of replacing the probe, the correct temperature
must be re-adjusted using the trimmer
The display indicates the
message
“No cups”
No cups in the dispenser
Microswitch failure
The cup column does not
rotate
If no cups were loaded when starting the machine, the
column rotation ratiomotor is activated to search for a full
column and if no cups are found within a 60 sec “time-out”,
indicated by the specific microswitch, the machine is locked.
Excluding the fact of a real lack of cups, the correct
microswitch functioning must be checked and in the event of
failure they must be replaced with identical characteristic
microswitches.
If the ratiomotor is locked, the correct actuation of relays K
21 and K 23 must be checked.
The display indicates the
message
“Espresso unit”
The espresso unit failed to
reposition.
Failure to the lower dead
centre positioning
microswitch.
Failure to relay K 03
Check for the correct operation of the lower dead centre
positioning microswitch.
Check that the unit stops correctly at the upper dead centre
(monitored via SW). If not replace the EPROM (programming
may be necessary).
The display indicates the
message
“Volumetric counter”
(flow-meter)
The coffee dose is not
reached within 60 sec.
(The volumetric counter in
the Colibrì Instant model is
used to measure also the
instant product doses).
The water amount for both espresso coffee and instant drink
selections is ensured by a volumetric counter; with the water
flow a wheel rotates and through a sensor that sends a
number of pulses corresponding to the water dose
programmed in the SW.
If such dose is not reached within 60 sec it means that there

NECTA SPA TECHNICAL MANUAL “COLIBRÌ”
Service Manual: Colibrì Edition 02-2002 20 /25
is a problem:
Check the correct operation of the volumetric counter: there
must be 5 V AC on the terminals during the counter
operation.
Check that coffee is not ground too fine and the dose
excessive.
Check for clogging in the coffee filters.
The display indicates the
message
“Air-break failure”
No water from the mains.
Faulty air-break microswitch
Failure to the float actuation
system.
If in the period it takes to make 6 selections with any dose
the microswitch controlled by the air-break float is not
triggered
The vending machine is locked for air-break failure.
The malfunction could occur for lack of water from the mains,
or because of a failure to float microswitch system.
Replace the microswitch with one having the same
characteristics, otherwise other malfunctions may occur.
The display indicates the
message
“RAM data”
Wrong RAM data, which
must be retrieved by
initialising the EPROM.
Enter into the installation procedure and initialise the
software; if the failure persists replace the CPU.
The display indicates the
message
“Water failure”
Models with water supply
from the mains:
If the air-break microswitch
is closed for more than a
minute.
Models with water supply
from an internal tank:
If the water level is less than
300 c.c.
Check the water inlet solenoid valve.
Check the correct actuation of relay K 12.
Check the air-break microswitch.
Check the tank float microswitch.
The coffee is too weak and
lacks cream and is
dispensed too quickly
Excessively coarse grinding.
Insufficient ground coffee
dose.
Inspect the grade of grinding, keeping in mind that it takes
between 15 and 20 seconds to dispense optimum espresso
coffee.
A shorter time means that the grade of grinding is too coarse.
With wear the grinding wheels must be adjusted regularly.
Check the coffee dose, weighing it for at least 5 consecutive
doses; the average weight must be between 6.5 and 7
grams.
Coffee is dispensed too
slowly and it tastes burnt
Excessive coffee dose.
Grinding too fine.
Faulty pump by-pass.
Clogged coffee filters.
Inspect the grade of grinding, keeping in mind that it takes
between 15 and 20 seconds to dispense optimum espresso
coffee.
A longer time means that the grade of grinding is too fine.
Adjust the grinding wheels.
Check the coffee dose, weighing it for at least 5 consecutive
doses; the average weight must be between 6.5 and 7
grams.
The by-pass is set from the factory to trigger at 12 bars.
Lower settings will lengthen the dispensing time and make
less cream.
Replace the coffee filters.
The mixers clog up The whipper failed to rotate.
Powder removal drawer full.
Insufficient water to powder
ratio.
Check for the motor overheating protection trigger, if
necessary check the cause of such trigger.
Empty the powder removal drawer.
Check / adjust the water to powder ratio.
The display indicates the
message
“Coin mech. failure”
In the case of a serial
communication kit, if there is
no communication for more
that 30 sec (with parallel
communication systems this
is not signalled).
Check for correct connections, correct insertion of the
protocol card, and SW settings.
The display indicates the
message
“Water leak”
If water is drawn from the
air-break without a selection
being made (or wash cycle)
the SW stops the mains inlet
solenoid valve to avoid any
flooding.
Such control serves the purpose of preventing water leaks in
the hydraulic system that could quickly fill the liquid waste
container; as there is no HW control of such situation,
carefully check the hydraulic system to find any leaks.