Prontobar Bean to Cup Coffee Machine
Cleaning & Troubleshooting Guide
Thank you for your purchase of the Nuova Simonelli Prontobar bean to
cup coffee machine, please follow this guide to ensure maximum machine
longevity and guarantee the best tasting coffee with every usage.
This guide is designed to help guide you through many of the cleaning and
troubleshooting procedures of this Nuova Simonelli unit.
95% of all breakdown calls we receive are due to poor cleaning procedures,
this guide will ensure that you don’t simply become a statistic.
If you have any queries/problems with anything in this guide, please call our helpdesk on 01977 687 580.
CAUTION
Only use Nuova Simonelli approved cleaning products.
Only use non-corrosive, non-abrasive household cleaners.
Only use non-abrasive cloths.
Do not use any of the normal (rapid) decalcifying agents.
Do not use boiling water for the cleaning process.
Make sure that all tubes and components are properly back into their original position
before turning the unit back on.
Failure to clean your machine correctly WILL invalidate your warranty in the event of a breakdown.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 1
Prontobar Cleaning Guide
Prontobar control panel
Daily Cleaning Cycle
(This cleaning process should be performed at the end of each working day or in busy locations at intermittent periods)
1. Prior to this process, empty the drip tray to ensure no spillages or overflow [figure 1].
Figure 1
2. Fill tank/container with cold water (approx. 1 litre) alongside 50ml of milk cleaner and
place the milk tube into this mixture [figure 2].
Figure 2
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 2
Prontobar Cleaning Guide
Daily Cleaning Cycle continued...
3. Press and hold the cleaning key [figure 3] for approximately 5 seconds to initiate the
cleaning sequence.
Figure 3
4. Open the decaf ground coffee section via the lid [figure 4] and insert only
recommended cleaning tablets [figure 5](failure to use correct cleaning tablets can
cause permanent damage).
Figure 4
Figure 5
5. Press the cleaning key [figure 3] again to initiate this further cleaning sequence.
6. This cleaning procedure will last for up to 5 minutes.
7. Once the cleaning process has finished the display will read ‘Rinse - Press Clean’
after the first phase is complete.
8. After the first cleaning phase is complete, place 1 litre of cold water into a clean jug.
9. Insert the milk tube into the water before briefly pressing cleaning button for 5
seconds to initiate the milk frother cleaning cycle.
10. Once this cycle is complete your Prontobar machine will return to the ‘Select
Product’ screen.
PLEASE NOTE: DO NOT USE NON-STANDARD CLEANING TABLETS, THIS CAN
CAUSE DECAF CHUTE BLOCKAGES AND ISSUES WITH COFFEE DISPENSING.
PLEASE VISIT OUR WEBSITE FOR APPROVED CLEANING TABLET ORDERS.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 3
Cleaning the delivery (brew) group
(This cleaning process should be performed at the end of each working day)
1. Open the Prontobar front panel and ensure that the machine is switched off to
prevent issues or injury from occurring [figure 6].
Figure 6
2. Pull the clip shaped like an ‘R’ directly above the piston [figure 7].
Figure 7
3. The piston can now be removed ensuring that the fitting washer is not lost [figure 8]
and cleaned with the brush provided or a soft cloth [figure 9].
Figure 8
Figure 9
4. Once the cleaning process has been completed, ensure that all attachments and
parts are correctly placed to ensure safe refitting. This includes any washers and
o-rings.
[continued on next page...]
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 4
Cleaning the delivery group continued...
5. Re-attach the piston using the R-clip within the lower of the two holes [figure 10].
Figure 10
6. Finally clean the surrounding area of the brew group (also known as the delivery
group) with the cleaning brush provided [figure 11].
Figure 11
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 5
Cleaning the milk frother
(This cleaning process should be performed at the end of each working day)
1. Open the Prontobar front panel and ensure that the machine is switched off to
prevent issues or injury from occurring.
2. Remove the metal cover from the coffee outlet by sliding upward [figure 12].
Figure 12
3. You should now see the milk frothing valve [figure 13].
4. Remove the red and clear pipe from the main milk frothing valve.
5. The main frothing valve unit can be disassembled further, to do so, first remove the
frothing end by pulling down [figure 14].
Figure 14
6. Remove all remaining sections by twisting in an anti-clockwise motion and pulling
downwards [figure 15].
Figure 15
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 6
Cleaning the milk frother continued...
7. This should result in 4 unattached valve parts [figure 16].
Figure 16
8. Soak all 4 parts in lukewarm water that contains a small amount of cappuccino
cleaner.
9. Using the brush provided, brush and clean any valves to ensure that blockages are
cleared [figure 17].
Figure 17
10. Once soaked, to reassemble, ensuring all parts are locked together by twisting in a
clockwise direction.
11. Replace the pipes in the corresponding positions [figure 18].
Figure 18
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 7
Cleaning the milk frother continued...
12. To rebuild the milk frother and coffee dispenser, ensure that all pipes are tucked
into the correct positions within the machine [figure 19].
Figure 19
14. Consult the internal guide found on the inside of the Prontobar door for guidance if
required [figure 20].
Figure 20
13. Once in position replace the metal housing and close the machine [figure 21].
Figure 21
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 8
Cleaning the milk restrictor
Milk restrictor fitted models only
Some Prontobar models come fitted with a milk restrictor that is calibrated to help
create perfect milk foam without user input.
As part of your daily cleaning process, it is important to ensure that this milk restrictor
is cleaned thoroughly to prevent machine issues and poor tasting milk-based drinks.
1. Locate the milk restrictor valve found at the end of your milk pipe [figure 22].
Figure 22
2. Remove the valve from the end of the pipe [figure 23].
Figure 23
3. Using the brush or brushes provided clean the internal valve and rinse before
reattaching to the end of the milk pipe [figure 24].
Figure 24
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 9
Cleaning the grounds drawer
(This cleaning process should be performed at the end of each working day)
1. Open the Prontobar front panel [figure 22] and ensure that the machine is switched
off to prevent issues or injury from occurring.
Figure 22
2. Remove the drip tray to access the coffee grounds drawer [figure 23].
Figure 23
3. Remove the left side portion [figure 24] and empty the used coffee into a bin or
waste disposal bag.
Figure 24
4. Rinse and clean the grounds drawer, before drying and replacing.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 10
Cleaning the steam arm
(This cleaning process should be performed at the end of each working day)
1. Remove the tip of the steam wand and clean with brushes provided [figure 25].
Figure 25
2. Soak the tip if deemed necessary.
3. Press the steam dispense button found on the front panel of the Prontobar [figure
26] and allow to run for 3-4 seconds to ensure all blockages are removed.
Figure 26
4. Wipe the steam arm with a damp cloth.
5. Repeat this process 2-3 times to ensure steam is clear and consistent.
PLEASE NOTE: DO NOT SOAK STEAM WAND OR STEAM WAND PARTS IN
WATER. THIS WILL CAUSE LONG TERM DAMAGE OR RUST ISSUES.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 11
Adjusting milk flow and temperature
Milk regulator models only
1. Open the Prontobar front panel and ensure that the machine is switched off to
prevent issues or injury from occurring.
2. Place a milk jug with thermometer under the delivery group [figure 27].
Figure 27
3. Find the milk regulator valve located on the milk pipe to the upper right of the
machine [figure 28].
Figure 28
4. To increase the temperature of the milk turn the regulation valve clockwise in 15
minute increments as per [figure 29].
Figure 29
PLEASE NOTE: IF REGULATOR VALVE IS OVER-TIGHTENED THE MACHINE WILL
ONLY PRODUCE STEAM AND NO MILK
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 12
Adjusting milk flow and temperature continued...
Milk regulator models only
5. Close the machine front panel and turn on the machine, now press the milk foam
button [figure 30] to test the milk temperature.
Figure 30
6. Repeat this process, making minor adjustments to the regulator valve until your
desired temperature has been reached.
7. To reduce milk temperature adjust the regulator valve by turning the valve anticlockwise in 15 minute increments.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 13
Adjusting milk flow and temperature
Autosteam models only
The autosteam nozzle consists of a stainless steel outer pipe with an air inlet and
teflon inner pipe.
1. The Autosteam nozzle is located at the right side of the Prontobar machine front
panel [figure 31].
Figure 31
2. Remove the outer cover pipe to reveal the internal plastic pipe within wand [figure
32].
Figure 32
3. To adjust the level of foam, twist the clear pipe clockwise to increase the foam
amount or anti-clockwise to decrease the foam amount [figure 33].
Figure 33
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 14
Milk foam adjustment
1. Ensure that the front panel of the Prontobar is closed and locked in position.
2. Locate the steam adjustment screw, located behind the steam wand or on the right
side of certain Prontobar models [figure 34].
Figure 34
3. To increase the thickness of milk foam press and hold the milk button [figure 35].
Figure 35
4. Once the milk begins to dispense, using a screwdriver turn the screw anti-clockwise
slowly to adjust the milk foam level being dispensed [figure 36].
Figure 36
5. To decrease foam levels simply turn clockwise to the desired milk consistency.
PLEASE NOTE: MILK FOAM MAY NEED TO BE ADJUSTED FROM TIME TO TIME
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 15
Removing the advertising panel
The removal or adjusting of the advertising or drink selection panel allows you to make
changes or clean as deemed necessary.
1. Using a flathead screwdriver or soft spatula utensil, find the centre of portion of the
plastic advertising panel fascia.
2. Lift the plastic away by leverging from the machine to prevent the plastic from
fracturing and damaging your Prontobar machine [figure 37].
Figure 37
3. Undo the clasps at the upper portion of the machine to fully remove the fascia from
the Prontobar machine.
PLEASE NOTE: REMOVAL OF THE ADVERTISING PANEL IS DONE SO AT THE
CUSTOMERS OWN RISK ANY DAMAGE REPAIR WILL BE CHARGEABLE
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 16
Clearing grinder blockages
Grinder blockages can cause a number of problems, your machine may not be able to
dispense coffee as a result.
If coffee is not being dispensed, follow these steps to identify and solve the issue:
1. Open the front panel of the machine and ensure that the bean hopper seal [figure
38] is not closed and preventing beans from entering the grinder.
Figure 38
2. If this does not solve the issue, then switch off the Prontobar machine, unscrew
and remove the coffee bean hopper from the upper portion of the machine [figure 39]
before ensuring that the machine is 100% powered down.
Figure 39
3. Using the grinder clearing tool provided [figure 40] place the tool into the grinder and
lock into position on the central column [figure 41].
Figure 40
Figure 41
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 17
Clearing grinder blockages continued...
4. Turn the tool clockwise to remove any blockages and clear the grinder [figure 42].
Figure 42
5. Replace the bean hopper, close the machine and run through 3 to 4 coffees before
tasting to test if this has solved the issue.
6. If the problem persists then please call our engineers on 01977 687 580.
PLEASE NOTE: FOREIGN OBJECTS CAN CAUSE BLOCKAGES, PROCEED WITH
CAUTION SHOULD THIS OCCUR.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 18
Troubleshooting
Message
‘Machine Ready Drawer Full’ E01
‘Machine Ready Drawer Out’ E02
‘Machine Off Front Panel Open’ E03
‘Clean Warning’ - A2
‘Flowmeter Error’ - E12
‘Milk Clean Warning’
‘Refill Water Tank’
‘Please Decalcification’ - A5
Cause and solution
Cause: The grounds drawer is full.
Solution: Empty the grounds drawer and reinsert the bin into the machine. (see pg. 10)
Cause: The grounds drawer is not in the machine or placed incorrectly.
Solution: Ensure that the bin if fully pushed back
and in place. (see pg. 10)
Cause: The front panel is open.
Solution: Ensure that the door is fully closed
and locked.
Cause: The weekly cleaning program has not
been performed within the programmed time
frame.
Solution: Perform the weekly cleaning cycle.
Cause: The daily cleaning program has not been
completed.
Solution: If water tank fill version, ensure tank
is filled correctly and flush the hot water tap until
water runs through normally.
Follow daily cleaning cycle before flushing the
hot water tap until water runs through normally.
If problem persists call us on 01977 687 580 for
service options.
Cause: The daily cleaning program has not been
done inside the programmed time frame.
Solution: Perform the daily cleaning cycle.
Cause: Your water tank is empty or incorrectly
connected.
Solution: Switch off the machine with the main
switch, remove and refill the tank before switching on the machine.
Check the position of the water level and ensure
water tank is seated within the machine correctly.
Cause: The machine needs decalcification.
Solution: Contact maintenance service or call
us on 01977 687 580 for service options.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 19
Troubleshooting (Continued)
No milk / reduced milk / milk is not frothing correctly
Check all the milk system and pipes for any blockages, i.e. dried/thick milk.
(This is by far the most common reason for no/reduced milk)
In this case please follow the instructions on page 7 ensuring everything is cleaned properly and
no pipes are kinked or damaged.
If this does not fix the issue, please try the steps below.
Check the milk container has sufficient milk.
Check all internal pipes to make sure there are no kinks or pinches.
Make sure that when the door closes the milk pipe is correctly seated in its hole and it is not pinched
in the door.
Check where the milk pipe is placed in the milk;
Ensure it is actually in the milk and not sitting above it.
Alternatively make sure that it is not touching the bottom of the milk container as the suction can
cause it to fix itself to the container stopping the milk flow.
If all of the above has been checked and the whole milk system is clean the final issue maybe too
much or too little air mixing with the milk. The amount of air mixing with the milk can be adjusted
by turning the air valve with a screwdriver. Turn clockwise to decrease the amount of air and anticlockwise to increase (see below).
*Please note, milk can froth differently from different batches and with age. Milk that is about to go off
will not froth at all. This difference in froth will affect the drink levels in the cup.
Milk too cold
Clean the milk frother
Increase the temperature using the milk flow regulator - if fitted.
Ensure machine is up to temperature giving time in between drink dispensing.
Milk not frothing
Clean the milk frother
Increase the foam amount by using the foam adjustment screw
Milk not being dispensed
Ensure frother is clean
Check the tightness of the milk flow regulator - this can be overtightened causing milk blockages.
Ensure milk pipe is not kinked or become disconnected.
Clean restrictor located at the end of the milk pipe - if fitted
Water leaking under the machine
(Mains fill only) Check the water connection to the back of the machine is tight and not dripping.
Check there are no cracks in the drip tray and it is pushed fully into place.
Check there are no cracks in the grounds draw and it is positioned correctly.
Check the drip tray is not full or has a cracked or split.
If these steps have not fixed your issue please call our team on 01977 687 580
Failure to clean your machine properly will invalidate machine warranty in the event of a breakdown.
Nuova Simonelli Prontobar Cleaning Guide For Software Version 72+
Page 20