Chopin Mixolab User manual

20, avenue Marcellin Berthelot - Z.I. du Val de Seine
92396 Villeneuve La Garenne cedex - France
Tél. : [phone] - Fax. : [phone] www.chopinservice.com
www.chopin.fr
Mixolab
Maintenance manual
Ref.: MM-MIXO-EN Ind. 0
Date: April 2012

Mixolab
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Maintenance manual MM-MIXO-EN Ind. 0
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IMPORTANT
The technical elements that constitute this manual (text and illustrations) are not contractual,
their only target being to bring assistance for troubleshooting and repairing the Mixolab.
Use, duplication or disclosure of subject data, for any purpose other than relating to the
servicing or repair of the equipment, is strictly prohibited without the written authorisation of
Tripette & Renaud Chopin.

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Table of contents
Chapter 1 Operation & Maintenance:
reminders & additional information . . . . . . . . . . . . .7
1. Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2. Precautions related to tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3. Control and maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Chapter 2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
1. Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2. Fault handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3. Interconnection diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Chapter 3 Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
2. Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Chapter 4 Spare parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123
1. Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
2. Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 125
3. Parts lists . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127

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Mixolab
Chapter 1 OPERATION & MAINTENANCE:
REMINDERS & ADDITIONAL
INFORMATION

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Chapter 1 Operation & Maintenance:
reminders & additional information
Chapter 1. Operation & Maintenance: reminders &
additional information
This chapter summarizes most of the important instructions relating to operation and maintenance of the
Mixolab.
For detailed information, refer to the Instruction Manual.
In addition, this section contains further information solely intended for people entitled to carry out
maintenance and repair operations on these units.
1. Operating conditions ■ Installation
Installation of the equipment requires a plane, clear and clean sur-
face. The equipment must be levelled by means of its adjustable
feet.
Do not place the Mixolab behind a window, particularly if it is
exposed to sunlight for severals hours a day.
The Mixolab must not be placed right up against a wall. Leave
sufficient space to ensure proper ventilation.
The working area shall also take into account all subsidary opera-
tions.
The waste water cooling circuit shall be installed very carefully:
❏ use of reinforced hoses,
❏ fastening with cable clamps,
❏ discharge hose fixed.
■ Electrical connection
Electrical connection of each device shall be performed in compli-
ance with the standard IEC 1010 - installation class: II.
❏ Characteristics of the electric supply source :
• 230 V~ - 50/60 Hz - ≥2 kVA
• Connection with 2 Phase + Earth / 16 A plug
• The electrical network must incorporate, upline from the units, a
differential circuit breaker with a sensitivity ≤30 mA - class AC.
❏ A 2-Phase + Earth supply plug can only be connected to a socket
fitted with a protective conductor.
This is a safety measure: if plugging-in is not possible, do not try to
force it, call a specialist in order to install a suitable socket.

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Chapter 1 Operation & Maintenance:
reminders & additional information
■ Environment
❏ Operating temperature:
Lab ambient temperature: +10°C < T ≤+ 30°C
❏ Hygrometry:
Use: RH ≤85 %
❏ Pollution:
The Mixolab is designed to operate under conditions free of pollu-
tion, or with a dry and not conducting pollution.
❏ Water of the cooling water circuit
The water temperature of the cooling water circuit must be in a
range between 15 ˚C and 20 ˚C.
2. Precautions related
to tests
■ Tests on the Mixolab must always be conducted with great care.
All necessary instructions (test conditions, handling, cleaning) are
detailed inside the Instruction Manual, and must be respected scru-
pulously; failure to do so could lead to:
❏ erroneous results,
❏ severe damage to the equipment.
■ During handling, the operator must take care not to damage
kneading arm blades.
■ Always check if the placing of the temperature sensor for pastry
on the bowl plate is not being blocked.

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Chapter 1 Operation & Maintenance:
reminders & additional information
3. Control and
maintenance
■ Status of the LED on front panel
In case of error, the LED stops flashing when the error is
acknowledged on the PC. It returns to the colour reflecting
apparatus status.
■ General recommendations
To improve the efficiency of maintenance operations on the devices,
keep an updated record of interventions, dates and any relevant
information on device life.
■ Reminder of useful menus
❏ Maintenance screen
A screen showing the Mixolab mimic diagram monitors operation of
the main modules of the device.
In order to access this mimic diagram, click on "Configuration" and
then on "Maintenance".
Colour / LED status Meaning Note
Off Mixolab switched off
Green Mixolab ready
Flashing green Electronic init problem (memory...) or 230V on
the board
See Chapter 2
Amber Motor running (MIXOLAB in cycle)
Flashing amber ERR 4, 41, 42, 5, 51, 52, 53 (motor or torque
error)
See Chapter 2
Red Hot bowl (Temperature of the dough
thermocouple or heating block bowl > 50°C)
Blinking red ERR 11, 12, 13, 14, 15, 16, 21, 22 (temperature
error)
See Chapter 2
Flashing Green / amber / Red Mixolab self-tests
Continuous flashing Green / amber /
Red (more than 2 minutes)
Tank empty when switching on
=> switch off and fill the tank

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Chapter 1 Operation & Maintenance:
reminders & additional information
Note : For passwords, refer to the corresponding procedures in this
manual.
❏ Audit trail
The "Mixolab Chopin" software contains a settings and errors audit
trail that can be useful for Mixolab maintenance.
To access this menu, click on "Audit trail" and then on "Audit trail".
❏ Software update
An "Update" menu allows to download a new version of the
embedded software. This operation can only be performed by
entitled agents - see Operation 11-1 "Updating the Mixolab
software" page 90.
Dough
temperature
sensor
Mixer motor
speed setpoint
Mixer motor real
speed
Parameter access
(password
protected)
Close
Water injection
Cooling solenoid valveTorque sensorCover locking
Mixer bowl
temperature
setpoint
Mixer bowl real
temperature
Mixer bowl locking
Tank temperature
setpoint
Real temperature
of tank
Metering pump
Water injection
solenoid valve
Quantity of
water in ml
Test without temperature
adjustment (Maintenance mode)

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Chapter 1 Operation & Maintenance:
reminders & additional information
■ Preventive actions
USER It is reminded to users that a regular control of the device perform-
ance, like a "control chart", is highly recommended.
A regular control of the test results on known flour samples allows to
detect errors leading to possible failures (quality of testing opera-
tions, of testing environment or of the equipment).
ENTITLED AGENT It is furthermore recommended to ask CHOPIN or an authorized
agent for a complete overhaul of the equipment.
Recommended frequency: Once a year, possibly every 2 years in
case of less frequent testing.

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Chapter 1 Operation & Maintenance:
reminders & additional information

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Chapter 2 TROUBLESHOOTING

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Chapter 2 Troubleshooting 17
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Chapter 2. Troubleshooting
The aim of this chapter is, in case a fault appears, to find the probable origin and to isolate any failed compo-
nent or sub-assembly; the required actions are then detailed.
For any inquiry to TR Chopin, please mention the serial number of the equipment.
1. Method ■ Possible failures are listed in:
- A. Error messages
- B. Other faults.
❏ Other abnormal events may occur:it is then up to the serviceman
to find the solution using analyses and comparisons. Simplified
interconnecting schematics are provided in section 3. of this chap-
ter, they may help to locate failures.
Of course, in case of difficulty or doubt, the engineering services of
CHOPIN Technologies are available to try to solve the problem, via
phone, fax or e-mail.
If this fails, the unit will have to be sent back to CHOPIN for work-
shop troubleshooting and repair.
■ Before starting any troubleshooting, all useful indications should
be recorded.
❏ In the event of abnormal results, a consultation of the results fol-
low-up log (control chart), if one exists, may provide an immediate
answer (case of continual drift for example).
❏ It is recommended to consult the settings audit trail in the menu
"Audit trail".
❏ Regardless of the failure, it is recommended to carefully record
the conditions under which the failure occurred.
If a failure occurred during a test, it is recommended to keep a
record of the curves and test results.

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2. Fault handling Switch off the power supply and disconnect the power cable before
removing covers.
Follow safe practice if you need to perform operations on powered
equipment without covers.
A Error messages
ERR No Description Action See in
Chap.3
ERR 11 "Bowl block T˚ too high!"
Bowl block T˚ > 10% of setpoint in
stable phase
■ Confirm on maintenance screen.
Problem on cooling circuit
- Input water too hot: rectify
- No water a output:
Check hydraulic connection, solenoid valve
operation (using maintenance screen), flow
controller setting.
If the circuit is blocked, find where by dis-
mantling it piece after piece.
■ Wrong temperature information:
- Calibrate bowl temperature measurement.
- Replace temperature sensor if the problem
is not solved.
op. 11-7
op. 11-2
op. 2-2
ERR 12 "Bowl block T˚ too low!"
Bowl block T˚ < 90% of setpoint in
stable phase
■ Confirm on maintenance screen.
■ Wrong temperature information:
- Calibrate bowl temperature measurement.
- Replace temperature sensor if the problem
is not solved.
■ Cooling too important:
- Test the solenoid valve using the
maintenance screen and control its
efficiency on exhaust. If the solenoid valve is
jammed, replace it.
- Check water flow and adjust it if necessary
using the flow controller.
■ Insufficient heating:
- Control the heating circuit
- If necessary, replace the failed resistor(s).
op. 11-7
op. 11-13
op. 2-1

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ERR 14 "Bowl block temperature rise in
problem!"
After 5 min in calibration, bowl block
T° < 90% of setpoint)
■ Confirm on maintenance screen.
■ Cooling too important :
- Test the solenoid valve using the
maintenance menu and verify its efficiency
on exhaust; if the solenoid valve is jammed,
replace it
- Check the water flow and set the flow
controller if necessary
■ Insufficient heating:
- Check the heating circuit
- If necessary, replace the failed resistor(s).
op. 11-7
op. 11-13
op. 2-1
ERR 13 "Bowl block still hot!"
10 min after end of test
bowl block T° > setpoint T° or 30°C
if setpoint T° > 50°C
■ Confirm on maintenance screen.
Problem on cooling circuit
- Input water too hot: rectify
- No output flow:
check hydraulic connection, solenoid valve
operation (using maintenance screen), flow
controller setting.
If the circuit is blocked, find where by dis-
mounting it piece after piece.
■ Wrong temperature indication :
- Calibrate the bowl block temperature
measurement.
- Replace the sensor if the problem is not
solved.
op. 11-2
op. 2-2
ERR 15 "Bowl still hot!"
10 min after end of test, bowl
thermocouple T˚ still > 50˚C (this
may be a thermocouple problem)
■ Confirm on maintenance screen.
Problem on cooling circuit
- Input water too hot: rectify
- No output flow:
check hydraulic connection, solenoid valve
operation (using maintenance screen), flow
controller setting.
If the circuit is blocked, find where by
dismounting it piece after piece.
■ Wrong temperature indication :
- Calibrate the bowl temperature
measurement.
- Replace the bowl thermocouple if the
problem is not solved
op. 11-7
op. 11-2
op. 2-3
ERR No Description Action See in
Chap.3

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ERR 16 "Electronic problem on bowl block
heating!"
Permanent bowl block heating
control detected by heating safety
■ Switch the Mixolab off and then on.
■ Problem on CPU board
- Check all connections on the Mixolab CPU
board
- Replace the CPU board if the problem is
not solved. op. 9-1
ERR 21 "Tank temperature too high!"
Cooling time out (after 15 min of
heating absence, tank T˚ > 110% of
setpoint)
■ Confirm on maintenance screen.
■ The lab temperature is too high (it shall be
lower than [setpoint_T – 5°C]) -> modify it
and wait for temperature decrease or
replace the water by colder water.
■ Wrong temperature indication:
- Calibrate the tank temperature
measurement
- Check and replace the sensor if the
problem is not solved.
op. 11-3
op. 4-5
ERR 22 "Tank temperature too low!"
Heating time out (after 15 min of
heating absence, tank T˚ < 90% of
setpoint)
■ Confirm on maintenance screen.
■ Wrong temperature indication :
- Calibrate the tank temperature
measurement.
- Check and replace the sensor if the
problem is not solved.
■ Insufficient heating :
- Check the heating circuit.
- If necessary, replace the failed resistor.
op. 11-3
op. 4-5
op. 11-13
op. 2-1
ERR 23 "Tank empty!"
Icon at the bottom of the screen = red
Fill the Mixolab tank. If there is enough
water:
■ Wrong indication of water level:
- sensor float jammed: remove it, check it
and replace it if necessary.
- Replace the CPU board if the problem is
not solved.
op. 4-2
op. 9-1
ERR 3 No communication with the Mixolab,
during access to a menu requiring a
dialogue
■ Verify that the Mixolab is correctly
connected and switched on.
■ Check the USB connection (or RS 232
connection) between the PC and the
Mixolab, including internal wiring.
■ Replace the CPU board if the problem is
not solved.
op. 9-1
ERR No Description Action See in
Chap.3