scholtès automatic, built-in coffee...

SCM1

Scholtès automatic, built-in coffee machine

SCM2


Contents

1) Technical Specifications

2) Accessibility

3) Wiring diagram

4) Water circuit diagram

5) Test procedures

6) Troubleshooting

7) Technical info


Technical Specifications

Accessibility

Removing the surround

vi

Unscrew the first

six screws

securing the

surround on the

right hand side -

Unscrew the first

six screws

securing the right

side of the

surround......

… and the other

six screws

securing the

surround on the

left.

continued

Accessibility

Unscrew the three screws securing

the surround at the top, near the brew

group.. … and the two screws at the

bottom.continued


Accessibility

continued

Unscrew the two screws

securing the cover on the

right ,...

... and the 1 screw on the left

(be careful when putting back

together).


Accessibility


On taking off the

cover, remove the

faston and other

connectors, as shown

in the photo.

Accessibility


Unscrew the screw

on the left and

.. on the right. If this is too

awkward to do, we recommend …

remove the switch and ..

… unscrewing the

3 screws.

The cappuccino

foamer pipe can then

be pulled out.

Accessibility

To remove the outer casing, unscrew the

3 screws in the rear panel.

continued

Removing the rear panel.

Accessibility

Removing the casing

… and unscrew

the screws

shown in the

photo on both

the right and

left.

Caution: there

is also a screw

at the bottom of

the trays.

Remove the casing.

Accessibility

Removing cover

To remove the

cover, unscrew

the 4 screws as

shown in the

photos.

Unscrew the

2 screws securing

the finger guard and

pull it upwards to

remove.

Unscrew the

plastic cap

Dismantling the coffee grinder

Accessibility


Unscrew the

3 screws securing

the coffee bean

hopper.

Accessibility

Accessibility


Unscrew the

screws

securing the

knob.

Accessibility


Lift off the bean

hopper.

Accessibility


Disconnect the two

faston connectors

from the motor and

pull the grinder up

and out.

Accessibility

Dismantling the flow meter

Detach

connector

Using a screwdriver as a

wedge, unhook the

flowmeter

Flow meter

Unscrew the rubber

cap

Detach

connector

Accessibility

Dismantling the pump

Ulka pump

Pull out the small

spring

Pull out the tube; be

careful with the o-ring

Remove the wire

spring

Pull out the

tube

continued…

Accessibility

Dismantling the pump

Holding the pump lug with a

12mm spanner, unscrew the

valve + damper assembly

Pull out the

tube

feeding into

the pump

Pull the pump

out from its

rubber support,

first from the

bottom then from

the top.

Accessibility

Removing the circuit board

Power board

Unscrew the

5 screws

securing the

circuit board

to the casing;

be careful

with the cable

glands!

2 at the top

1 in the

middle

2 at the

bottom

Accessibility

Dismantling the steam unit

Steam unit

Remove the

steam vent

Pull out the tubes from

the damper and valve

Unscrew the

earth screw

continued…

Unscrew the

2 screws indicated

Accessibility

Dismantling the steam unit

Take out the earth faston

connector from the

solenoid valve.

Now you can

extract the steam

unit to replace the

full sub-assembly,

solenoid valve

and TCO’s (TCO’s

are secured with a

nut on the inside).

Accessibility

Dismantling generatore + meccano valve

To remove the

generator,

disconnect tubes

from couplers,

there are 4 screws

to unscrew.

Caution: hold the

nuts in place on

the inside.

continued…

Accessibility

Inside the door

Inside the tank

compartment

Near the

solenoid valve

Near the slide


Accessibility


Caution:

When assembling, align the

meccano valve with the brew

group. Position the 4 screws +

4 bolts, then give them a few

turns; then, with the machine in

test mode, allow the carriage to

rise to the top dead center, pull

out the plug then tighten the

four screws to a torque value of

2/3Nm.

1

2 3

4 Final torque for front and back

screws of 2/3Nm

Screw tightening sequence

1. Back left

2. Front right

3. Back right

4. Front left

Accessibility

Dismantling positioning assembly

After removing the steam unit,

you can also remove the

positioning assembly.

Remove the

2 faston

connectors

from the

motor

board...

… and the

faston

connector

from the

earth.

Accessibility


Remove the brew group. Remove the carriage.Unscrew the 2 screws.

(When reassembling, add

LOCTITE Type 243 to the

thread and tighten to a

torque of 2–2.5 Nm)

Accessibility


Unscrew the self-tightening screw. You can now pull out the

positioning unit.

Wiring diagram

THEORETICAL

DIAGRAM

Wiring diagram

MICRO KEY

MICRO KEY

M1 TOP UNIT

M2 BOTTOM UNIT

M3 COFFEE GROUNDS DRAWER

M4 ACCESS DOOR

M5 IFD PRESENCE

M6 PIPETTE PRESENCE

PRACTICAL

DIAGRAM

SCM2 water circuit diagram

SCM1 water circuit diagram

SCM1 test procedure

MODEL TEST PROCEDUREICON AND ASSOCIATED LOAD

ACTIVATION

ICON LOAD

Length PUMP

Key LockMOTOR UP +

LIGHT

Menu HEATER

Strength STEAM UNIT

2 cups

1 cup

Cappuccino

Steam

Solenoid 1 +

Solenoid 2

UP menu GRINDER

Frothy

milkMOTOR DOWN

LOAD TEST

MODE

Sch

olt

ès T

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ch

IF

D

With the machine on stand-by (off

but with the main on/off switch set

to I), open the service door and

press and hold the 1 CUP,

STRENGTH and MENU keys at

the same time for at least 6

seconds, or until the message

“SELECT TEST” appears on the

display. After this, shut the service

door and press the CAPPUCCINO

icon: LOAD TEST MODE will

appear on the display.

To exit test mode, unplug from the

power supply.

Solenoid valve 2

(brew head) + FAN

Solenoid valve

1 (drain)

SCM1 test procedure

MODEL TEST PROCEDURE

ICON AND ASSOCIATED

DISPLAY

Icon

NOTES

Display Unit

Sc

ho

ltè

s T

ou

ch

IF

D

DISPLAY

TEST

MODE

With the machine on stand-

by (off but with the main

on/off switch set to I), open

the service door and press

and hold the 1 CUP,

STRENGTH and MENU keys

at the same time for at least

6 seconds, or until the

message “SELECT TEST”

appears on the display. After

this, shut the service door

and press the 1 CUP icon: all

digits will light up on the

display followed by the words

“DISPLAY TEST MODE”.

1 cup

2 cups

Cappuccino

Frothy

milk

Long/short

STRENGTH

Down Menu

Key Lock

MENU

UP menu

OK

Hot water

On/Stand by

BUTTON 1

BUTTON 2

BUTTON 3

BUTTON 4

BUTTON 9

BUTTON 10

BUTTON 8

BUTTON 12

BUTTON 11

BUTTON 6

BUTTON 7

BUTTON 5

BUTTON 0

When not used for

10 seconds, the

machine exits test

mode. The original

language is reset and

the first priming

enabled.

SCM2 test procedure


ICON AND ASSOCIATED LOAD

ACTIVATION

LOAD TEST

MODE

Sc

ho

ltè

s T

ou

ch

Su

pe

r V

ap

ou

r

With the machine on stand-by

(off but with the main on/off

switch set to I), open the service

door and press and hold the 1

CUP, STRENGTH and MENU

keys at the same time for at least

6 seconds, or until the message

“SELECT TEST” appears on the

display. After this, shut the

service door and press the

STEAM icon: LOAD TEST MODE

will appear on the display.

To exit test mode, unplug from

the power supply.

ICON LOAD

Long/short PUMP

Key LockMOTOR UP +

LIGHT

Menu HEATER

Strength STEAM UNIT

2 cups

1 cup

SteamSolenoid 1 +

Solenoid 2

UP menu GRINDER

Hot water MOTOR DOWN

Solenoid valve 2

(brew head) + FAN

Solenoid valve 1

(drain)

SCM2 test procedure


ICON AND ASSOCIATED

DISPLAY

Icon

NOTES

Display Unit

Sc

ho

ltè

s T

ou

ch

Su

pe

r V

ap

ou

r

DISPLAY

TEST

MODE

With the machine on stand-

by (off but with the main

on/off switch set to I), open

the service door and press

and hold the 1 CUP,

STRENGTH and MENU

keys at the same time for at

least 6 seconds, or until the

message “SELECT TEST”

appears on the display.

After this, shut the service

door and press the 1 CUP

icon: all digits will light up

on the display followed by

the words “DISPLAY TEST

MODE”.

1 cup

2 cups

Steam

Long/short

STRENGTH

Down Menu

Key Lock

MENU

UP menu

OK

Hot water

On/Stand by

BUTTON 1

BUTTON 2

BUTTON 4

BUTTON 9

BUTTON 10

BUTTON 8

BUTTON 12

BUTTON 11

BUTTON 6

BUTTON 7

BUTTON 5

BUTTON 0

When not used for

10 seconds, the

machine exits test

mode. The original

language is reset and

the first priming

enabled.

Troubleshooting

Before doing anything or replacing any components, make sure you have all service documentation for the model to be repaired(specifications, test procedures, technical reports and information).

Possible complaints you may receive from customers are listed below. The first thing to do is check if there are reasonable grounds to the complaint.

It is important to determine if the problem was caused by:

1) Incorrect use of appliance by the customer.

2) Technical fault.

Troubleshooting

1) Complaints may be caused by incorrect use of the appliance, and generally refer to:

- The coffee is not hot.

- The coffee is not very creamy, and doesn’t taste nice

(see table on next page)

Troubleshooting

Problems complaints

What to ask the

customer

Possible causes

Remedies

The coffee is not hot.

Caution: check the temperature after the third coffee has been made; the temperature should be 78 C+- 3 C

When did the problem occur? Right from the beginning or after a period of time?

- The cups haven’t been warmed.- The brew group is cold.

- Heat the cups with hot water. (Especially on cold days)- Heat the brew group by selecting “RINSE”

The coffee temperature set is too low.

From the menu, set a higher coffee temperature. (There are three options)

Hot water tank is crusted with limescale.

Check how many coffees have been made and how often it has been descaled. Check the temperature of the coffee leaving the brew head; check after the third coffee. The temperature should be 78 C+- 3 C It it is below this, descale and try again.

continued

Troubleshooting

Problems complaints

What to ask the

customerPossible causes Remedies

The coffee tastes bad, is watery and not

very creamy.


The coffee grind is too coarse.

Check grinder settings. Turn the grinder setting knob to position 4/5 (factory setting) with the grinder running; brew 2/3 coffees and check how they are delivered. If nothing has changed, turn the knob to position 1 (with the grinder running) and try again, brewing 2/3 coffees. If it is still being ground too coarsely, take the machine away. (See specifications on next page)

The grinders are worn out.

Replace the grinder.

continued

Troubleshooting

Problems complaints

What to ask the

customerPossible causes Remedies

The coffee tastes bad, is watery and not

very creamy.


The coffee is too finely ground.

Check grinder settings. Turn the grinder setting knob to position 7 with the grinder running; brew 2/3 coffees and check how they are delivered. If it is still too finely ground, take the grinding unit away. (See specifications on next page)

Have you changed type of coffee?

A different type of coffee has been used.

Readjust the grinder settings to suit personal taste.

Not a good quality coffee or not suitable for use with espresso machines.

Use a better quality coffee / use a blend that is recommended for espresso machines.

Troubleshooting

2) When a fault is encountered, the machine

may generate the following messages:

- General alarm

- Coffee too finely ground, adjust grinder.

- Fill the coffee bean hopper.

- Fill the tank.

- Descale

(see table on next page)

TroubleshootingError

messageWhen? Possible causes Remedies

General alarm

The message appeared as soon as the machine was switched on.

NTC, temperature sensor.

Check the sensor connection on the PCB; check the resistance in ohms: if it is 0 (short circuit) or infinite (open circuit) replace the component.

The message appeared when the motor was briefly actioned.

Upper or lower micro limit switch.

Check microswitches are working properlty, and replace as applicable.

Hall cell sensor board

Check the connection between the Hall cell sensor and circuit board. Replace if necessary.

Main PCB Replace.

Six minutes after it was switched on, the machine still showing that it is heating up.

Safety TCO activated.

Replace.

Heating element not heating.

Replace.

Main PCB Check the connection and replace as necessary.

continued

Troubleshooting

Error message

When?Possible causes

Remedies

General alarm

After switching on, there was a funny noise when the brew group moved.

The upper and lower micro-switches are not closed.

Check if the two micro-switches are working properly, and if necessary replace them.

Coffee too finely ground, adjust grinder.

While operating

Air in water circuit

Reset the coffee grinder settings by moving the knob to a higher number. (Always do this with the grinder running). Push the tank to make sure it is securely engaged, bleed any remaining air from the circuit (press “hot water”). Check the connection and replace the flow meter if necessary. Check the permanent filter below the water tank to make sure there is nothing obstructing the flow of water; clean and replace as necessary. Check the generator by disconnecting the inlet water pipe and starting the pump (in test procedure) to remove the air pocket.

continued

TroubleshootingError

messageWhen? Possible causes Remedies

Fill coffee bean hopper (make sure it is full)

The message persists even when there are beans in the hopper. There was a funny noise when coffee was grinding.

Friction noise due to stones or other objects in the grinding wheels.

Dismantle the top part of the grinder unit and take out the stone or excess coffee grains inside. Check the grinder motor is working using the test procedure; if the motor is idling the transmission belt is broken. The entire grinder needs to be replaced in this case.

The message persists even when there are beans in the hopper. The motor is not rotating.

The motor is faulty.

Replace the entire grinder unit.

Fill the water tank (make sure it is full)

The message appears even when there is water in the tank.

Float Check the float in the tank and that it isfree to move in its assigned position.

Reed switch sensor.

Check the reed switch, making sure it is connected properly. Replace if necessary.

continued

Troubleshooting

Error message When? Remedies

Descale

When the machine indicates that descaling is required, is is not a sign of a fault, but notification that the machine, the generator and relevant pipes need to be thoroughly cleaned to get rid of lime scale.

The flow meter measures the amount of water used and when a preset limit is exceeded the machine generates an alert. Four different water hardness levels can be set.The reactive strip supplied with the machine is a quick way of testing water hardness so you can set it to the correct level. (1 soft water ...... 4 very hard water)

The 4 settings are: water hardness 1 = 250 litreswater hardness 2 = 130 litreswater hardness 3 = 80 litreswater hardness 4 = 40 litres

Problems occur when the descaling message appears right after the appliance has been descaled. In this case, it means that it was not done properly and has to be repeated.

Descale.

Technical Information

Setting the grinder

Unscrew the screw on the knob

and pull it out. Unscrew the two

screws and remove the safety

guard.

Turn the ring shaft clockwise until

the end of stroke position. Take

out the moving grinder.

continued on following page...


Setting the grinder

Check that the elastic ring is in the

right position.


Remove the retaining ring.


Setting the grinder

Turn the ring shaft anticlockwise

until the end of stroke position then

pull it out.

Turn the ring nut CLOCKWISE for

finer grinding. Turn the ring nut

ANTICLOCKWISE for coarser

grinding. Turn in 1 or 2 clicks at a

time.



Setting the grinder

Insert the shaft, aligning the scale on

the ring nut with the rib indicated.

Insert the retaining ring.

(Make sure you insert it correctly.)



Setting the grinder

Turn the ring shaft CLOCKWISE until

the end of stroke position then insert

the grinder.

Then turn it ANTICLOCKWISE until

the end of stroke position.

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