LAVAZZA LB 4712 Maintenance Manual
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LAVAZZA LB 4712 Maintenance Manual

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LB 4712
MAINTENANCE MANUAL
FOR TECHNICAL ASSISTANCE
M
10066846 / R
. 0.00 / M
2012
anual code
el
aRch

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Summary of Contents for LAVAZZA LB 4712

  • Page 1 LB 4712 MAINTENANCE MANUAL FOR TECHNICAL ASSISTANCE 10066846 / R . 0.00 / M 2012 anual code aRch...
  • Page 2 LB 4712 Machine code 10080586 Manual code 10066846 Rel. 0.00 edition 03/2012 © copyright laVaZZa S.p.a. Tel. 0039.011.2348429 Fax 0039.011.23480466 technicalservice@lavazza.it...

  • Page 3: Table Of Contents

    Maintenance manual for technical assistance TABLE OF CONTENTS 1. GENERAL INFORMATION ....1 5. INSTALLATION AND START UP ... . . 9 1.1.
  • Page 4 Maintenance manual for technical assistance 8.2.3. Valves ......21 8.3. cleaning ......21 8.3.1.

  • Page 5: General Information

    Warning It is recommended that the Internet site of the lavazza Technical Service be checked (at the following address If this manual is damaged or lost, it is possible to http://ts.inlavazza.it) to ensure that your manual is the...

  • Page 6: Machine Composition

    In the plate the following data of the machine are indi- cated: - manufacturer; - machine model; - serial number; - lavazza’s product code; - date of manufacture; - power supply voltage (V) and frequency (hz); - power consumption (W); - water mains pressure (MPa).

  • Page 7: Boiler

    Maintenance manual for technical assistance 1.3.6.2. Brewing unit The brewing unit and the heat exchanger are funda- mental components to obtain espresso coffee. Specifically the function of the unit is coffee dispensing. In this system the brewing unit (1) is heated by a ther- mosiphon circuit (2) connected to the heat exchanger (3).

  • Page 8: Automatic Water Entry System (A.e.a)

    Maintenance manual for technical assistance 1.3.6.3. Automatic water entry system (A.E.A) 1.3.6.4. Flowmeter The automatic water entry system checks the water level The flowmeter measures the quantity of water sent to in the boiler. the brewing unit for espresso brewing. The flowmeter generates some electric impulses which The system is composed of: are sent to the electronic control unit.

  • Page 9: Pumping System

    The main safety precautions that should be used when 1.3.6.8. Electronic control unit operating the machine are described below. lavazza This unit electronically controls does not foresee every possible situation that could be the coffee dose via the water potentially dangerous.

  • Page 10: Stop Functions

    Attention carried out, following a different procedure than that in- Press the central key (5), to reset the thermostat. Be- dicated in the manual, please contact lavazza technical fore restarting the machine, verify the causes of the service before starting.

  • Page 11: Residual Risks

    2.3. Residual risks The careful hazardous analysis performed, has allowed most of the risks connected with operating and mainte- nance machine conditions to be eliminated. lavazza re- minds the user that the instructions, procedures and Valve group recommendations contained in this manual should be...

  • Page 12: Handling And Storage

    Maintenance manual for technical assistance When the pressure is at zero, completely empty the 4. DISMANTLING AND DISPOSAL boiler, by opening the specific valve located on the 4.1. Instruction for end of life treatment lower part of it. If the above procedure is not correctly carried out, the opening of any part of the hydraulic cir- This product conforms to art.

  • Page 13: Installation And Start Up

    Maintenance manual for technical assistance 5. INSTALLATION AND START UP Warning The presence of magnetic fields or proximity of elec- 5.1. Unpacking tric machines which generate disturbances, may open the packaging, taking care not to damage it. Re- cause malfunctions in the electronic control of the move the machine protections and the equipment con- machine.

  • Page 14: Water Connection

    Maintenance manual for technical assistance 5.3. Water connection To avoid oxidation and damage to the machine over time, do not use iron fittings for the hydraulic con- Remove any rubber plugs which may be inserted in the nection, even if they are zinc plated. valve fixtures of the softener.

  • Page 15: Electric Connection

    Maintenance manual for technical assistance Manual code 10066846 / Rel. 0.00 / March 2012...

  • Page 16: Programming

    Maintenance manual for technical assistance The key (2) indicates the tens and the key (3) indicates the units. To increase or decrease the temperature of 1°c use the keys (2) and (3) respectively. To confirm the new set value, pres the SToP/PRoG (6) key for at least 3 seconds.

  • Page 17: Dispensing Steam

    Maintenance manual for technical assistance 6.2.2. Dispensing steam To dispense steam, turn the tap knob (8) anticlockwise: Press the hot milk key (3). the steam coming out from the steam pipe (9) will be proportional to the opening of the tap. Wait for steam dispensing to be completed.

  • Page 18: Setting Of Milk Frothing

    Maintenance manual for technical assistance When the set temperature is reached, it is possible to 6.3.3. Setting of milk frothing enable steam dispensing again by keeping the frothed To modify milk frothing through the autosteamer proceed hot milk key (2) pressed. as follows: - remove the left side panel of the machine (a);...
  • Page 19 Maintenance manual for technical assistance - the air, passing through the one-way valve (c), is mixed with the steam in the “autosteamer interface” (l); - the steam comes out from the nozzle (h); - the probe ( I ) connected to the electronic control unit detects the milk temperature during heating;...

  • Page 20: Diagrams

    Maintenance manual for technical assistance 7. DIAGRAMS 7.1. Electrical mains connection wiring diagram Manual code 10066846 / Rel. 0.00 / March 2012...

  • Page 21: Machine Power Supply Wiring Diagram

    Maintenance manual for technical assistance 7.2. Machine power supply wiring diagram Manual code 10066846 / Rel. 0.00 / March 2012...

  • Page 22: Wiring Diagram Of The Electronic Central Unit

    Maintenance manual for technical assistance 7.3. Wiring diagram of the electronic central unit Manual code 10066846 / Rel. 0.00 / March 2012...

  • Page 23: Hydraulic Diagram

    Maintenance manual for technical assistance 7.4. Hydraulic diagram Manual code 10066846 / Rel. 0.00 / March 2012...

  • Page 24: Inspections And Maintenance

    Maintenance manual for technical assistance 8. INSPECTIONS AND MAINTENANCE 8.1. Periodical inspections every week check the boiler pressure using the machine pressure gauge. Note The boiler pressure must be 0.8-1.2 bar. every week check the softener condition. every four months check the gaskets of the brewing unit (for brewing unit disassembling see the section 8.2.1.).

  • Page 25: Valves

    Maintenance manual for technical assistance 8.2.3. Valves when this value is reached there is the confirmation of the correct operation of the valve and the sealing of the once a year, at least, check the correct operation of the gaskets and solenoid valves safety valve, pressure relief valve and discharge one- - disable the dispensing;...

  • Page 26: Body

    Maintenance manual for technical assistance Warning If the capsule holders are not daily cleaned the qua- lity of the dispensed coffee and the correct opera- tion of the capsule holder may decline. every week, immerse the capsule holders in hot water for at least 10 minutes with proper detergent (see spare parts).

  • Page 27: Troubleshooting

    Maintenance manual for technical assistance TROUBLESHOOTING 9.1. Signalling and solutions to the most common problems PROBLEM CAUSE SOLUTION The selector switch is placed to “0” or “1” Turn the selector switch to “2” posi- position. tion. The on/off switch is damaged. Replace the on/off switch.
  • Page 28 Maintenance manual for technical assistance PROBLEM CAUSE SOLUTION check the level probe for correct po- Steam mixed with water comes The boiler level is too high. sition and presence of any surface out from pipes lime scale. check that there is water in the no water mains.
  • Page 29 Maintenance manual for technical assistance PROBLEM CAUSE SOLUTION The pressure gauge is defective. Replace the pressure gauge. The pressure gauge indicates an The boiler calibration is incorrect. adjust the calibration of the boiler. unacceptable pressure adjust the calibration of the power- The power-pump calibration is incorrect.
  • Page 30 Maintenance manual for technical assistance PROBLEM CAUSE SOLUTION after a few minutes the automatic filling Turn the machine off and then back of water stops. Time-out device is activated. no water in mains. open the water mains tap. The leds of all the keyboard The automatic level valve is closed.
  • Page 31 Maintenance manual for technical assistance PROBLEM CAUSE SOLUTION The inlet is clogged even partially. clean the pump filter. The pump rotates in the wrong direction. check the motor. calibrate the pressure adjusting The pump is not properly calibrated. The pump works below the screw.

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