Unic Rumba Operation and maintenance manual

- 1 -
NOTICE TECHNIQUE
1st EDITION
MAY2004 UNIC SAS
Z.I. 4eme RUE – B.P. 425
06515 CARROS CEDEX 1 – France

- 2 -
1. PREPARATION OF THE SITE
The machine is delivered in a cardboard box screwed onto a wooden pallet.
A. Unpack the machine
- Cut the tightening strap with shears.
- Open the cardboard box and take the accessories’ container out.
- Make screws loose by slightly inclining the cardboard box.
- Take the machine out of the cardboard box and put it on wooden blocks.
- Remove screws and washers used for transport.
B. Install the machine and preparation of the site
-Put the machine in its final place and level it up with the help of rubber washers, as necessary.
-The machine must be placed on a horizontal surface.
-There must be a free space of 5 cm behind the machine and the ventilation holes on the top of the machine
must not be obstructed.
-A socket with a ground system and a water-supply pipe corresponding to the characteristics of the machine
are sufficient for connecting.
Set up cup racks after making adjustments.
2. HYDRAULIC CONNECTION
A water softener is necessary.
Water Intake
- Pressure ranging from 0 to 10 bar
- Connection : 3/8 gas female socket (male plug on
machine)
- Pipe with a minimum 8 mm internal diameter
- Stop valve to be set up.
Drainage
- Connection : 3/4 gas female socket (male plug on
machine)
- Pipe with a minimum 12 mm internal diameter.

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3. ELECTRIC CONNECTION
-.None of the switches must be in ON position.
-Make sure that the voltage, frequency and power values marked on the descriptive plate of the machine are
in conformity with the electric network mains.
-Mount a plug on the end of the machine cable (plug with grounding: green/yellow wire).
. POWER CONNECTIONS
Set the machine switch to Position .
The machine is delivered with a cable consisting of 5 numbered wires.
Make sure that the machine connection matches the available voltage network (see wiring
diagrams hereunder). Bring the necessary modifications into the supply cable and the plug located
near the electrically-driven pressurestat.
WIRING DIAGRAMS
N1 L1 L2 L3
N0 1 2 3
MAIN
COMMUTATOR
BORNIER
TERMINALPLUG
PRESSOSTAT
PRESSURESTAT
RESISTANCE
HEATING ELEMENT
14
26
35
4 5 6 THERMOSTAT
SECURITE RESISTANCE
HEATING ELEMENT
SAFETY THERMOSTAT
156
1 2 3
P1P2 P3
CABLE
CORD
N2 3
4
ALIMENTATION BOITIERS ELECTRONIQUES
ET TRANSFORMATEUR NEON
FEEDING ELECTRONIC BOXES
AND NEON TRANSFORMER
BORNIER
TERMINAL PLUG
PRESSOSTAT
PRESSURESTAT
RESISTANCE
HEATING ELEMENT
THERMOSTAT
SECURITE RESISTANCE
HEATINGELEMENT
SAFETY THERMOSTAT
CABLE
CORD
ALIMENTATION BOITIERS ELECTRONIQUES
ET TRANSFORMATEUR NEON
FEEDING ELECTRONIC BOXES
AND NEON TRANSFORMER
MAIN
COMMUTATOR
BORNIER
TERMINALPLUG
PRESSOSTAT
PRESSURESTAT
RESISTANCE
HEATING ELEMENT
THERMOSTAT
SECURITE RESISTANCE
HEATING ELEMENT
SAFETYTHERMOSTAT
CABLE
CORD
ALIMENTATIONBOITIERSELECTRONIQUES
ET TRANSFORMATEUR NEON
FEEDING ELECTRONIC BOXES
AND NEONTRANSFORMER
N Ph Ph1 Ph2 Ph3
N Ph1 Ph2 Ph3
380 / 400 / 415V TRI + N + 200 / 230 / 240 V MONO + 200 / 230 / 240V TRI +
4 5 6
NL1PEL3 L2
N 1 2 3
14
26
35
4 5 6
1 2 3
P1 P2 P3
4 5 6
N 1 2 3
N1 L1 L2 L3
N0 1 2 3
14
26
35
4 5 6
1 2 3
P1 P2 P3
4 5 6
N 1 2 3
N 1 2 3
N 1 2 3
N1 L1 L2 L3
N0 1 2 3
MAIN
COMMUTATOR
N 1 2 3
15
64
2
3
NL1
PE L3 L2
1
25
63
4
N
NL1PEL3 L2
A : Electronic box
B : Switch
IN ALL CASES, THE GREEN/YELLOW WIRE
MUST BE EARTHED

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4. STARTING-UP
4.1FILLING THE BOILERS
-Turn on the shutoff valve.
-Plug in the machine.
-Set the charge switch to Position 1. Do not set the charge switch to
Position 2 until the boiler has been filled.
ON/OFF SWITCH
4.1a STEAM BOILER
- As soon as the machine is turned on, the filling takes place automatically.A safety is programmed, if the filling
does not occur before 3 minutes. In this special case, the electrovalve and the pump are cut off. The indicator light
blinks when steam and hot water outlets are not activated.If after 3 minutes the indicator light is still blinking :
- Check the hydraulic connection of the machine.
- Switch off and switch on the machine by setting the charge switch to Position 0then to position 1.
The filling starts again and lasts 3 minutes.
4.1b INTERNAL BOILERS
- With the filter holder in place, press the continuous/stop key of each unit. \\
As soon as the water flows correctly from the spout (with no air), press the same key again to stop the
water.
4.2 HEATING
-When the boilers have been filled, Set the charge switch to Position 2.
-When the operating temperature of the machine is reached, the pressure-gauge must indicate a pressure of
0.9 to 1 bar (red scale).
It is better to keep the machine switched on permanently and the filter-holders inserted in machine
even when you are not making coffees.
5. CHECKS AND ADJUSTMENTS
.To get to the various adjustments, the cup rack, the rear panel or the sides must be removed.
Proceed as follows:
.CUP RACK:
Remove the grids, than
unscrew the 4 upper screws and the two
side screws. Than remove the cup rack.
.REAR PANEL(S):
Unscrew the 2 screws located inside the
machine at its back; than make the
panel(s) glide laterally.
.SIDES:
On each side, unscrew 2 screws of the
cup rack and pull-up the side.

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5.1 TEMPERATURE ADJUSTMENT BY MEANS OF THE ELECTRIC
PRESSURE CONTROLLER
.The pressure controller ( pressurestat) is located at the
back..
.Dismantle the cup rack, remove the cover of the
pressure controller to get to its adjustment
screw.
-TIGHTEN to LOWER the temperature
-LOOSEN to RAISE the temperature.
.The pressure-gauge (red scale) must
indicate a pressure of between 0.9
and 1 bar which corresponds to a
temperature of 120°C.
5.2 PRESSURE-RELEASE VALVE ADJUSTMENT
RUMBA Model
The HP valve is located in the lower part at the right rear
of the machine: it is necessary to dismantle the right side.
The valve must open at about 10 bar (green scale of the
pressure gauge).
- If the valve opens ABOVE 10 bar LOOSEN
- If the valve opens BELOW 10 bar TIGHTEN
Use a pin-wrench; after the adjustment,do not forget to
block the counter nut.
TWIN RUMBA and TRI RUMBA Model
The HP valve is located in the lower part at the left rear
of the machine: it is necessary to dismantle the left side.
The valve must open at about 13 bar (green scale of the
pressure gauge).
- If the valve opens ABOVE 13 bar LOOSEN
- If the valve opens BELOW 13 bar TIGHTEN
Use a pin-wrench; after the adjustment,do not forget to
block the counter nut.

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5.3 PUMP - PRESSURE ADJUSTMENT
In infusion, the pressure must be between 9 and 10 bar (pressure gauge - green scale)
RUMBA Model
The pump is located in the left side
and the adjustment must be done from
the same side of the machine.
.TIGHTEN to INCREASE the pressure.
.LOOSEN to DECREASE the pressure.
TWIN RUMBA and TRI RUMBA Model
The pump is located in the right side
and the adjustment must be done from
the same side of the machine.
.TIGHTEN to INCREASE the pressure.
.LOOSEN to DECREASE the pressure.
5.4COFFEE GRINDING ADJUSTMENT
.Wait until the machine has reached the proper temperature (0.9 to 1 bar).
.The fineness of the grinding determines the time it takes for hot water to pass through the coffee.
.The passage-time is usually checked by using the 2-cup filter, with 2 doses of ground coffee.
.The average passage-time for 2 cups (6 to 7 cl. per cup) is from 30 to 35 seconds.
.If the passage-time is shorter, grind the coffee finer.
.If the passage-time is longer, grind the coffee coarser.
.For a good cup of coffee, use at least 6 gr. of ground coffee per cup.
FLUSHING INSTRUCTIONS
The unit is to be flushed prior to putting it into service, or after 24 hours of inactivity.
Dispense to the drain : - through each coffee head and water nozzle 0,5 litre of water
- through each steam nozzle some steam for 1 minute
"BEFORE PREPARING ANY BEVERAGE"

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6. PROGRAMING OF THE DIFFERENT COFFEE QUANTITIES IN THE CUP
P1 P2 P3 P4
P5
The keys from P1 à P4 can be programmed.
The multiple doses (1 , 2 ou 3 cups ) are calculated automatically from the programming of one
of them on each box.
1Set the machine switch to Position 0.
2Keep the key P5 pressed and put again the machine on.
Display of Pn then Pc and Pr by pressing several times the key P5
Pc = CALCULATED PROGRAMMING
Insert a filter-holder ( with coffee ) into the unit
Install cups
"P5 Display Pc
"P1 à P4 Select the dose to be programed (2c for example)
"P5 Start the infusion cycle
"P5 Press again to stop when the amount of coffee desired is correct.
Display of the corresponding digital value ( from 00 à 99 )
3
Repeat operation at 3 for the other doses ( 2C for example)
Pn = DIGITAL PROGRAMMING
Quick programming without coffee and/or values carried foward on other units.
"P5 Display Pn
"P1 à P4 Select the dose to be programed
"P5 Dispaly of the digital value of the selected dose
"P1 Increase the value
"P4 Reduce the value
εP5 Memorize the new value
4
Repeat operation at 4 for the other doses
5Pr = MANUAL PROGRAMMING
Same proceeding as in calculated programming Pc.
The manual programming doesn't calculate the other doses (1, 2 or 3 cups), only the
programed dose is modified.
Caution: any new programming ( Pn or Pc ) cancel ALL previous programed
values.
6Wait until the program mode is automatically inactivated (from 10 to 15s), or switch
off and on again the machine.

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6.1 2 CUPS ELECTRONIC BOXES (type d2)
6.1a USE OF THE DOSES TO BE PROGRAMED
−4 coffee doses and 1 manual function, Continu/Stop are available. During the infusion, it is displayed :
* 1c or 2c = 1 or 2 small cups
* 1C or 2C = 1 or 2 large cups
* C- = Continu/Stop
−At any time you can change the selection by pressing another key.
−The dosage is automatic but the infusion can be stopped manually by pressing the key Continu/Stop.
−Programing: The multiple doses being computed, only two programing are necessary (1c or 2c) and
(1C or 2C).
6.1b CONFIGURATION PARAMETERS
* dn / dt For the automatic calculation of the multiple doses
dn = normal dosage
dt = dosage with "Torino" kit
* C0 / C1 Chronometer for the infusion time
C0 = no chronometer
C1 = display of the infusion time
* A0 / A1 Authorization to program
A0 = prohibited programing
A1 = authorized programing
After switching on, the display shows the following information in order:
−The version number of the electronic memory: ex. r1
−The type of box: d2
−The active functioning parameters: ex. dn, CO, A1
6.1c MODIFICATIONS OF THE CONFIGURATION PARAMETERS
−Switch the machine off (switcher 0/1)
−Press simultaneously both keys P1 and P4, and in the same time, switch again the machine on
−Press the key P4 to change the selection (ex. dn or dt)
−Press the key P5 to change function (ex. dosage dn/dt or Chrono: C0/C1)
−Switch off to leave the configuration mode or wait the automatic leaving at the end of 10s.
Continu / Stop key

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6.2 3 CUPS ELECTRONIC BOXES (type d3)
PRO
6.2a USE OF THE DOSES TO BE PROGRAMED
−6 coffee doses and 1 manual function, Continu/Stop are available. During the infusion, it is displayed :
* 1c, 2c ou 3c = 1, 2 or 3 small cups
* 1C, 2C or 3C= 1, 2 or 3 large cups
* C- = Continu/Stop
−At any time you can change the selection by pressing another key.
−The dosage is automatic but the infusion can be stopped manually by pressing the key Continu/Stop.
−Programing: The multiple doses being computed, only two programings are necessary (1c, 2c or 3c)
and (1C, 2C or 3C). If it is necessary, the "Continu" dose can also be programed.
6.2b CONFIGURATION PARAMETERS
* dn / dt For the automatic calculation of the multiple doses
dn = normal dosage
dt = dosage with "Torino" kit
* C0 / C1 Chronometer for the infusion time
C0 = no chronometer
C1 = display of the infusion time
* A0 / A1 Authorization to program
A0 = prohibited programing
A1 = authorized programing
* cc/cC/CC Start of infusion in small or large cup
cc = always starts in small cups
CC = always starts in large cups
cC = keep the last selection : c or C
After switching on, the display shows the following information in order:
−The version number of the electronic memory: ex. r1
−The type of box: d3
−The active functioning parameters: ex. dn, CO, A1, CC
6.2c MODIFICATIONS OF THE CONFIGURATION PARAMETERS
−Switch the machine off (switcher 0/1)
−Press simultaneously both keys P1 and P4, and in the same time, switch again the machine on
−Press the key P4 to change the selection (ex. dn or dt)
−Press the key P5 to change function (ex. dosage dn/dt or Chrono: C0/C1)
−Switch off to leave the configuration mode or wait the automatic leaving at the end of 10s.
Continu / Stop key

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7. DAILY CLEANING AND MAINTENANCE
Coffee unit :
- Carry out 2 or 3 infusion cycles without any coffee in the filter to clean the unit and the filter-holder
joint (filter-holders not tightened)
- Wash the filter-holders and the filters in soapy water.
Overflow tray :
- Remove the overflow tray to empty it and rinse it under the tap.
Steam outlet tube :
- After each use, clean the steam tube with a wet rag and push steam push-button for a short moment to
eliminate the small amount of liquid (milk) left inside the tube.
Body :
- Clean the body of the machine using a soft cloth and alcohol for the stainless-steel parts and a non-
abrasive detergent for the painted parts.
Do not forget to regenerate your water softener periodically.
ATTENTION :
Air must be able to circulate freely all around the machine. The ventilation holes located at the rear and
on the top of the machine must not be obstructed.
The machine is not to be operated without its legs.

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Water Softener Regeneration : how ?
A- Water intake
B- Water outlet
C- Intake tap
D- Outlet tap
E- Discharge pipe
F- Regenerating pipe
G- Lid wheel
Use 1 kg of salt when the
softener is 400 mm high.
Use 2 kg of salt when the
softener is 600 mm high.
INSTRUCTIONS FOR
USE :
Install an empty vessel with
a 2-litre capacity under Pipe E.
Turn Handles Cand Dfrom
the left to the right.
Unscrew Gto remove the
lid.
Insert salt.
Restore the lid to its initial
position.
Turn Handle C from the right
to the left
Let the salted water run
through Pipe Funtil it gets
soft.
Turn Handle Dfrom the right
to the left

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Water Softener Regeneration : when ?
Example :
Daily amount of used coffee : 3 kg
Number of 7-centilitre cups : 420
Daily water consumption : 30 litres
Daily number of 20-centilitre cups of tea : 150
Daily water consumption : 30 litres.
Conclusion : - Total daily water consumption is 60 litres
- Water hardness is 30°TH.
See 30°Column and line 60 of Table hereunder.
- DV 50 Water softener must be regenerated every 2 weeks.
- CN 97 Water softener must be regenerated every 5 weeks.
CN 97 Model Height : 600 mm Diam. : 185 mm Resin : 16 litres Salt : 2 kg
Water hardness °TH 20° 25° 30° 40° 50° 60° 80° Daily
consumption
Softened water 
CN 97 Model 2500 2350 2100 1800 1600 1400 1000 Water in
litres Coffee in kg
36 34 30 26 22 20 14 10 1
1 10 171614131110 7 20 2
1,5 15 111099775 30 3
2 20 9876554 40 4
2,5 25 7665443 50 5
3 30 6554432 60 6
3,5 35 5444332 70 7
4 40 4443322 80 8
4,5 45 4333222 90 9
5 50 3333221
NUMBER OF
6 60 3322221
WEEKS BETWEEN 2
6,5 65 3222211
REGENERATING
7 70 2222111
TREATMENTS
7,5 75 2222111
ACCORDING TO FLOW
8 80 2222111
CAPAC. & WATER °TH.
Coffee
in kg Water in litres 1200 1100 1000 900 760 700 500 Softened water DV 50 Model
Daily consumption 20° 25° 30° 40° 50° 60° 80° Water hardness °TH
DV 50 Model Height : 400 mm Diam. : 185 mm Resin : 8 litres Salt : 1 kg

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8. CONNECTION TO A COMPUTER SYSTEM
A. GENERALITIES
Connection to a computer system (Hartwall, Walla, Remenco, ...)
The coffee machine informs the computer (in real time) about the number of cups of coffee and tea
(made with temporized hot water). The computer is in charge of the management of the collected
coffee machine data.
Each barman has got a coded badge that gives him permission to use the coffee machine and directly
charge the served drinks.
B. MACHINE PREPARATION
Prior to being connected to a computer system, a coffee machine of the RUMBA range must be modified
as follows:
1. Ref. 45026 and 45027 (with memory dated 22/07/97)
The following equipment is also supplied:
2. An interface box that records impulses coming from units and hot water outlets and transmit
them to the computer
3. The cables connecting the interface to the coffee machine
4. A key switch to enter in programing mode.
INTERFACE
BADGE
Release ofcontrols
Impulse Transfert
Temporized hot water
Computer System
Data Transfer
Access
to
Controls

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TROUBLE SHOOTING
VERY IMPORTANT
BEFORE TAKING ANY ACTION MAKE SURE THAT ALL THE ADJUSTMENTS ARE CORRECT.
1. TEMPERATURE 120°C
STEAM PRESSURE 0,9 to 1 bar (14 PSI)
2. INFUSION PRESSURE 9 to 10 bar (140 PSI)
High pressure valve opening : over 13 bar (188 PSI)
3. WATER SUPPLY PRESSURE 0 bar to 6 bar (0 PSI to 90 PSI)
If the machine "sucks" water directly from an external reservoir, check the water level in the
reservoir and the non-return valve and filter fixed at the end of the inlet pipe.
4. PRECAUTIONS TO BE TAKEN
Switch off the machine before any action on the electric circuits.
Cool the machine and make the pressures down before any action on the hydraulic circuit.

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9. DISPLAYED FAILURES
Push button 1
Push button 2
Push button 3
Push button 4
Push button 5
See on §9.1
Fuse See on §9.2
Time See on §9.3a > 105 sec
Metering + Time
Dosage Metering
See on §9.3b > 105 sec
See on §9.3b
Short circuit Metering
Opened Metering See on §9.3c

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9.1 PROBLEMS IN CONNECTION WITH THE ELECTRONIC BOXES'S CONTROL
BUTTONS
If it is displayed P1, P2 ... or P5, this means that the corresponding key is in short-circuit and can't be used any more.
Remedy:
- Check that the front is not deformed
- Change the electronic box
9.2 FUSE PROBLEMS
Display: F-
F- is displayed when the fuse located at the back of the electronic box is "cut out".
The fuse can be reached from the upper part of the machine after removing the cup warmer.

If the fuse is "all right" If the fuse is "cut out"

Check the fuse-holder
Clean fuse / fuse-holder contact points
Check the box connections:
Do not invert wires
(valve and motor-pump wires)
The cause must be determined, prior to fuse
replacement.
Possible causes:
- The valve coil of the unit is short-
circuited
- The motor-pump coil or R.C circuit
is short-circuited
∗- The motor-pump or valve outlets
of the electronic box are short-
circuited (inside the box)
- Cables are short-circuited
- Fuse failure.

- Replace faulty elements
- Replace the fuse

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9.3 DOSAGE PROBLEMS
9.3a 105-second safety system of the coffee unit
Thanks to such a safety system, the maximum infusion time is reduced and ranges from 1 minute to 45 seconds. As
a result, the infusion process automatically stops, if the dosing device no longer works or if the flow capacity is
insufficient so that the motor-pump and the valve of the unit are better protected.
When the safety system is on, tis displayed.
The flow of the water going through the coffee filter is insufficient.
The infusion time corresponding to the programed dose is more than 105 seconds.

The pump is faulty
Check:
- The pressure
- Power supply:
* cables
* condenser
- The mechanical state of
the motor-pump:
* filter
* coupling
One of the water passage holes
is clogged.
Check the hydraulic circuit:
- Nozzle of dosing device
- Unit nozzle
- Unit filter
- Unit valve
- Coffee filters
- The spout
The coffee grind is too fine:
- Use a coarser grind.

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9.3b Metering safety system
During the infusion process, cdis displayed. This means that the dosing device has been no longer transmitting
impulses to the unit electronic box for 5 seconds.
If the metering interruption is only temporary, the infusion cycle will stop as soon as the number of metered
impulses matches the number of programed impulses.
Obviously the obtained dose will be heavier.
If the metering interruption is permanent, the infusion will stop automatically 105 seconds after
the cycle has started and ctis displayed.
Or stop manually by pressing the Continu/Stop key. Display of cd
Display of ctor cd. The dosing device has stopped transmitting
impulses to the unit electronic box for more than 5 seconds.

Start a coffee cycle.
Check the control LED located on the dosing device.

It does not flash It flashes

The water does not run
through the spout The water runs through the spout
- Either there is no more
problem and it all nor-
mally works.

- Or the outgoing signal
wire of the device is dis-
connected.
(terminal: 32-out)
The hydraulic circuit is
blocked The dosing device no longer works
Check:
- There is water above
the dosing device
- Coffee filters are clean
- The grind is not too
fine
- The device nozzle is
all right
- The unit valve is
opened
- The unit nozzle
- The unit filter.
Check:
- The device cables
(power supply + 9V)
- The free rotary move-
ment of the turbine
- The magnets drowned
in the turbine are clean
- The dosing device
(outgoing signal)
Replace the dosing device, as
necessary.

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9.3c Dosing device safety system
Display of
cc Display of co

The 9V power supply of the dosing
device is short circuited:
Terminal 30 (+) is earthed
The 9V power supply circuit of the
dosing device is opened:
Terminal 30 (+) or earth
are disconnected.

To use the unit, press the Continu/Stop key
Check the cables and the connector of the dosing device
Replace the dosing device, as necessary.

- 20 -
10. OTHER FAILURES
10.1 HYDRAULIC PROBLEMS OF THE COFFEE UNIT
10.1a Doses lighter than initially set
The obtained doses are lighter than initially set

There is a leak located just after the dosing device

The decompression way of the unit
valve leaks during the infusion
process
Check flaps
One of the connections located
after the dosing device outlet leaks
Check waterproofness
Replace gaskets

Repeat dose programing
10.1b Dripping outside infusion periods
Water goes through the unit or the decompression pipe outside
infusion periods

The 3-way valve is opened as a result of the
too highly set expansion pressure
(>13 bar)
The valve flaps
are faulty

Set the high pressure valve opening
at 13 bar
The pump pressure must be set at 10 bar
Check the flaps
Replace the flap
core, as necessary.