Azkoyen ZEN Manual

Technical information
Z E N
Avda. San Silvestre, s/n
31350 Peralta (Navarra) Spain
Tel.: [phone]
www.sat.azkoyen.com

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== I N D E X ==
1. INTRODUCTION
1.1. DEFINITIONS
1.2. PRINCIPLE TECHNICAL CHARACTERISTICS
2. DESCRIPTION OF COMPONENTS
3. INSTALLATION AND SWITCHING ON
3.1. UNPACKING
3.2. SWITCHING ON
4. ERRORS
3.3. ERROR MESSAGES SHOWN ON THE DISPLAY
3.4. CONTROL POINTS
5. CLEANING AND MAINTENANCE
6. WORKING CONDITIONS AND NORMS
7. DIMENSIONS

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1. INTRODUCTION
The automatic vending machines in the ZEN range are destined to the elaboration and sale of
espresso coffee and instant beverages that consist of the mixture of hot water and soluble
powder or granules. The product is served in a plastic or paper cup.
In the rest of this document the following elements will be called:
The machines in the ZEN range, machine or machines. The espresso
coffee infusion brewer, infusion brewer. The electro valve, EV or EVs
1.1. DEFINITIONS
Espresso coffee: infusion of coffee elaborated according to the following conditions:
-7 g of ground coffee.
-The temperature of the infusion water between 92º C and 96º C.
-The water pressure at 8 kg/cm².
-The infusion time of the coffee between 20 and 28 seconds.
- The volume of water in the infusion 40 ml.
Volume dosage: this dosage system measures the volume of water that is used for the
espresso infusion.
Water pump: an electro magnetic system for pumping the infusion water and giving it the
correct pressure.
Infusion: this is the name given to the process of passing hot water through the ground
coffee to extract its oils and essences.
Volumetric infusion: when the process of infusion uses a constant volume of water.
Coffee tablet: the residual compressed coffee grounds after the infusion process.
Programming mode: when the machine is ready for any of its functions or parameters to be
programmed.
Working mode: when the machine is in the working state and ready to prepare any of the
services it offers.

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1.2. RANGE
The ZEN range is composed of the models that elaborate espresso coffee and instant
products.
The models with espresso coffee elaborate instant products as well.
The models with instant products only elaborate instant products
 The L range has a Fresh brew model destined to the elaboration of tea infusions
1.3. PRINCIPLE TECHNICAL CHARACTERISTICS
Super automatic function: the press of a button is sufficient to elaborate a
magnificent espresso coffee.
It grinds the coffee at the moment it is ordered.
Products that each machine can elaborate:
Zen
Coffee
beans
Sugar
Instant
coffee
Decaffeinated
Milk
Chocolate
Tea
MI
Yes
Yes
Yes
Yes
ME
Yes
Yes
Yes
Yes
MzI
MzE
LI
Yes
Yes
Yes
Yes
Yes
Yes
LE
LzI
LzE
Yes
Yes
Yes
Yes
Yes
The water temperature is programmable.
The ground coffee dose is programmable between 5 g and 8 g.
The switching on and off of the machine is automatic and programmable.
Water pump for water pressure incorporated in the machine.
Volume dosage of water in the different espresso coffee services is programmable.
The infusion element is thermo compensated.

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Power supply:
ZEN instant
Voltage
Power
Length
Mains voltage
230 Vac / 50 Hz
Heating element
230 Vac / 50 Hz
1100 W
Average daily consumption
3000 W
Mains flex
3.400 mm
ZEN espresso
Voltage
Power
Length
Mains voltage
230 Vac / 50 Hz
Heating element
230 Vac / 50 Hz
1100 W
Average daily consumption
3000 W
Mains flex
3.400 mm

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2. DESCRIPTION OF COMPONENTS
2.2. PRINCIPLE COMPONENTS
A1. Residue liquid bucket
It collects all the residue liquids that the machine generates. It has a capacity of 8 litres.
When it reaches a determined level an electronic device is activated to put the machine out of
order until it is emptied.
A2. Coffee residue bucket
It collects the solid residue that the machine generates. It has a capacity for the residue of
7500 grams of ground and elaborated coffee beans.

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A3. Infusion brewer + Piston
The two elements are made of resin, it is the element that the machine uses to make the
espresso coffee.
The infusion brewer has moving parts that are activated by a 220 Vac motor, that moves
a crank which moves the coffee from the grinder to the piston. At the same time it also
moves a lever that activates a micro switch; this indicates the position of the infusion brewer
to the control board.
To remove the group from its anchoring position should rotate the two levers that attach to its
support, as shown in the photograph. In case that the group was in dispensing position, to
remove it is necessary to remove the piston, as follows.
Pu ll out the cl i p
Remove the piston
To replace the infusion brewer into the machine it may be in any position and it does not
matter if it moves while out of the machine. It only needs to be replaced and the two holding
levers fixed. The infusion element motor will position it correctly.

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B1. Pistón
B2. Brewer
B3. Filter
B4. Lever
B5. Brewer Motor
B6. Position micro switch
B7. Infusion brewer movement
handle
The piston has a spring and two washers which,
depending where they are positioned, adjust the
pressure of the piston on the ground coffee
according to the quantity dosed.
The position of the washers according to the
quantity of coffee set in the doser is indicated in
the following table:
Coffee Dose
Numbers of washers in
bottom position
Numbers of washers in
top position
5 g
2
0
5,5 g
2
0
6 g
1
1
6,5 g
1
1
7 g
1
1
7,5 g
0
2
8 g
0
2

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A4. Beaters
The product is mixed with the hot water from the boiler in the blenders.
D1. Beater motor assembly
D2. Short blade mixer
D3. Beater assembly
D4. Shake funnel
D5. Screw
A motor with the following characteristics moves the blender blade:
Make of motor
Mabuchi
Voltage
24 Vdc
Power
20 w
Speed
16 rpm
The blender assembly can be removed from the machine by pulling on it until the pins that
fasten it are released and then revolving the motor to the right until the tabs that fasten it are
released
WARNING! When mounting the wiper motor (04101650) and wiper base
assembly (11037941 Beige / Grey 11037931 / Green 41221621) the grey
part which is inside the base must be pushed toward the beater motor
The contact between this grey part and the wiper base assembly must be avoided. If these two
bodies remain in contact or very close to each other, when the motor runs, friction between
the two parts causes them to fuse together, leaving the beater unusable. For this task,
Azkoyen has available in its catalogue, the appropriate tool which is part number 10040130.

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The EVs of the instant beverages are an important part of the beating process. They control
the hot water from the boiler to the beaters for the elaboration of the instant beverages.
They are fitted to a thermo compensated brass support that provides a constant temperature,
which is screwed into the hot water boiler. This way, during the elaboration of the instant
beverages, the hot water that goes to the beaters do not suffer excessive temperature losses
A5. Coffee bean hopper
Only the espresso coffee models have a container for coffee beans. It’s located above de
grinder coffee and he has a capacity of 1,9 kg
A6. Instant product hoppers
The capacity of the soluble product hoppers is 6 litres and the approximate product weight is:
Product
Sugar
Instant
coffee
Descaf.
coffee
Milk
Chocolate
Tea
Soup
Capacity in grams
2600
525
525
1300
1500
2000
3000

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A7. Programming box
This element is used for programming the machine.
A8. Extractor systems for cups, sugar and spoons
The three systems are mounted in the one support.
The instant models, standard, do not have a container for spoons
To remove the extractors from the machine, follow these steps:
1st Remove the sugar and cup container.
2nd Unscrew the screws indicated in the photo.
3rd Pull the extractors upwards until freeing them from the clips in the support.
4th Disconnect the CAN bus loom from the cup extractor board

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First the wiring loom should be disconnected by
removing the cover that protects the cup
extractor. The sugar and spoon extractor can be
separated from the cup extractor by freeing the
clip indicated in the photo and pulling upwards
F1. Clip
F2. Sugar and spoon
extractor motor
F3. Cup extractor motor
F4. Cup container movement
motor
F5. Cup support arm
F6. Cup arm motor
F7. Control board
F8. Cup extraction button
F9. Cup presence photocells
F10. Hopper position micro
F11. Sugar and spoon
extractor connector
Each Zen range models, may incorporate a cups extractor 70 mm, or 73 mm. The
characteristics of this cups extractors are:
Espresso and instant models
Quantity
320
320
Ø of cups
70 mm
73 mm
Voltage to motor
24 Vdc
24 Vdc
The cups should be opaque so the infrared detectors can detect them

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The cup container is divided into 5 separate columns. When one of them runs out of cups,
the motor turns the container until the next column is situated over the extractor. After the
motor turns for 6.5 seconds and the photocells do not detect a new column of cups, the
machine will go out of order and the display will show “Out of cups”.
The cup container holder has a button to extract a cup when it is pressed.
The electrical connections for the infrared photocell terminals that are used to detect the
cups are:
Depending on its intended market the machine, can incorporate spoon stractors 90 mm, or
105 mm.
Espresso and instant models
LE, Li and LFB Series
Quantity
350
350
Standard spoon measurement
90 x 9 x 1.5 mm
90 x 9 x 1.5 mm
Motor voltage
24 Vdc
24 Vdc
There is a Spoon extractor designed for spoons of 110 x 9 x 1.5 mm
Sugar extractor characteristics:
Espresso and instant models
LE and LI Series
Capacity
2600
Motor voltage
24 Vdc
24 Vdc
PHOTODIODE
ANODE
CATHODE
BROWN
BLACK
RED
BLACK
TERMINAL CUT
PHOTOTRANSISTOR
COLLECTOR
EMITTER
RED
BLACK
BROWN
BLACK

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A10. Product extractors
Its function is to extract the soluble product of the corresponding bin and send it to the beaters
of product. It consist of a motor Mabuchi and a reduction gear developed by Azkoyen.
Manufacturer: Mabuchi
Voltage supplier: 24 V cc
Speed: 40 rpm
A11. Coin system
All the models in the ZEN range use coin changers with Executive or MDB
communication protocol.
The models in the ZEN M range use a coin validator. It is always “exact amount”; no
change given.
On the left of the door there is a space for the coin changer which is held with three screws.
The connectors are situated on the upper part. When the machine is connected, it will
automatically detect if it has a coin changer with MDB or Executive communication protocol.
Executive coin changer
MDB coin changer

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A12. Coffee grinder
The grinder incorporated in Zen machines is Eldom brand, manufactured in Switzerland. Their
teeth are conical and operates at low speed, allowing the time-dosed amount of ground coffee,
without using a volumetric. Also favor a ground more "soft and gentle" with the coffee, the flat
teeth
It is supported to a metal support, tied to the frame of the cabinet with 3 screws. To remove,
simply remove these 3 bolts and electrical connector
The amount of coffee to be ground at each service time is adjustable from 315 function, see
the "Programming Manual".
Spinning the grind regulator, you can change both the degree, as the flow of ground coffee,
turning clockwise, you get a finer grind and flow is reduced. Turning to the contrary, the
ground is thicker and increases the flow. In the following chart, you can see the amount of
ground coffee on 6 scs, according to throttle position.
Technical characteristics
Voltage 230 Vca
Consumption 0,8 A
Spedd 1.250 rpm

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Removal of the teeth:
Loosening the two screws that secure the control
handle can be removed the upper tooth rotating
clockwise. To replace the tooth in place, turn it
clockwise until it locks with the lower wheel, then
3 point turn counterclockwise and screw the
adjustment knob.
A13. Button panel and display
Zen models, have 8 direct product selections and 4 pre-selections. Activation of these pre-
selections and selections are made using capacitive sensors, To order a product you do not
need to press any button, just bring your finger to the desired product and the machine
providing the service.
Behind the methacrylate of the door, is the card buttons and each button is placed its
corresponding product label, the fixing of these labels, is done by a label holder.
Each product label and pre-selection, is backlit by an LED, when requesting a product of the
machine, the remaining labels off, remaining lit only requested. When you press a pre-
selection, the signs are illuminated only product affected by the pre-selection, the rest goes
off.
On the push buttons electronic board, the display is connected, which is alphanumeric with two
lines of 16 characters each.Push buttons board is tied with four plastic nuts and protected by a
metal panel. The label holders are tied to the board by pressure. To access the board, you must
remove the cups container.

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A14. Water inlet EV
It allows the entry of water from the mains to the cold
water deposit. It works at 230 Vac. This EV is only fitted
to machines that are connected to the mains water
supply.
It has a security block system for cases where, for
lime scale or any solids from the main water supply,
the EV does not close properly. This system activates
when the level in the residue bucket is excessively high.
Umblock
To unblock the EV, switch off the water pressure from the mains. If this is not possible, tap
the EV with a blunt object, for example an Allen key, on the inside of the hole on the top
part of the EV as shown in the photograph.
It you may also unblock the EV by tapping it with something like the handle of a screw driver.
A15. Volumetric counter
Its function is to measure the quantity of water that is pumped for the elaboration of the
espresso coffee.
Inside, there is a blade with two small electromagnets, which rotates thanks to the force of the
water. As it rotates, the electromagnets affect a circuit located on the counter cover, making it
send 5 VDC impulses to the distribution board. Thanks to these impulses, the board is able to
measure the amount of water entering the machine in order to make the different products.
It has three electrical terminals: positive, negative and the terminal that sends the electrical
impulses.
If measured between the negative terminal _П_
when breweing pump is working, one can see
the change in the voltage to the passage of each
magnet, the voltage oscillates between 0 and 5
volts, indicating correct operation of the counter

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A16. Water pump
This element has the job of pumping water from the cold water deposit to the hot water boiler;
the cold water pushes the hot water towards the EVs for the instant products or towards the
infusion element for making espresso coffee.
K1. By-pass
K2. Anti return valve
When an espresso coffee is elaborated, the water pressure needed is quite high to be able to
pass through the compressed ground coffee in the infusion element. This resistance the coffee
offers makes the water pressure in the boiler increase up to a pressure of 9 Kg/cm². At this
pressure the by-pass (2) opens allowing a small amount of water to return; sufficient to
prevent the water pressure from going over the 9 Kg/cm².
The by-pass is a small hole covered with a ball that is held in place by a spring. This spring
will hold a pressure of 9 Kg/cm², but over this pressure it compresses and allows the
water to pass.
The pressure of 9 Kg/cm² is considered the ideal for elaborating espresso coffee.
When the instant beverages are elaborated, there is no resistance offered and so during there
elaboration the water pump works at lower pressures than when elaborating espresso coffees.
Technical characteristics
Voltage
Pulsing 110 V
Power
70 w
Working pressure
8 Kg/cm²
Maximum pressure
12 Kg/cm²
The pump has an anti return valve that prevents the return of water from the boiler.

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A17. Cold water deposit
Made of polypropylene, It has the capacity of
500 cc. It is at atmospheric pressure and
temperature. From this deposit is taken the water
to elaborate the espresso coffee and instant
beverages.
The water level in the deposit is controlled by a
float that activates a magnetic switch.
A18. Hot water boiler
The boiler works under pressure and has a capacity of 0.5 litres of water. The water for
elaborating espresso coffee and instant beverages is heated in this deposit.
The boiler is made of brass and does not need any device to control the level of water as the
boiler fills automatically from the moment the machine is switched on. After this the water that
is used is replaced with water from the cold deposit so the boiler is always full.
L1. 1500 W heating element
L2. Security thermostat 120º C
L3. Temperature sensor (PTC)
L4. Triac
L5. Electrovalves
The electrovalves for instant products and espresso services are located on a brass support
screwed on the boiler. The espresso EV has three ways: one is for water output coming from
the boiler, other one is directly going to the espresso brewer and the 3rd one, in rest status
allows the group to reach ambient pressure.

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M1. Solenoid
M2. Valve
M3. 3
rd
outlet
When the machine is in the espresso coffee making process, the third is closed while the
outlet from the boiler and the inlet to the infusion element are open to each other.
N1. 3
rd
closed
N2. To the infusion element
N3. From the boiler
When the machine finishes elaborating an espresso coffee, the EV goes to rest state and
closes the outlet from the boiler leaving the infusion element open to the third outlet. In this
way the water that did not pass through the coffee and was retained in the infusion element
goes out through the third outlet to the residue bucket.
The water recedes back from the infusion element towards the third outlet because of the
pressure it was submitted to by the pump in the infusion process.
P1. 3
rd
open
P2. Infusion element joined to atmospheric
pressure
P3. Boiler water closed
Technical characteristics:
Heating element voltage
230 Vac
Power
1.500 w
Temperature programming
40 a 99º C
Safety protection with manual reset
120º C
Voltage of EVs
24 Vac
Power of instant and espresso EV
10 w
Maximum pressure of EVs
15 Kg./cm²
Working temperature of EVs
-10º C a 140º C