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  4. LB 4712
  5. Maintenance Manual

LAVAZZA LB 4712 Maintenance Manual

Manual is about: FOR TECHNICAL ASSISTANCE

Summary of LB 4712

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    Lb 4712 maintenance manual for technical assistance m anual code 10066846 / r el . 0.00 / m arch 2012.

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    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.

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    Table of contents 1. General information . . . . . . . . . . . . . . . . . . 1 1.1. Structure of the manual . . . . . . . . . . . . . . . . . . 1 1.1.1. Scope and content . . . . . . . . . . . . . . . . . . . 1 1.1.2. Messages used . . . . . . . . . . . . . . . . . . . . . . 1 1.1.3. Users . . . . ....

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    8.2.3. Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8.3. Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 8.3.1. Capsule-holder . . . . . . . . . . . . . . . . . . . . . 21 8.3.2. Body . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 8.3.3. Steam...

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    1. General information 1.1. Structure of the manual before any operation is carried out on the machine,the maintenance technician must carefully read the instruc- tions contained in this publication. The undertaking of any operation on the machine, without having read and understood the contents of ...

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    1.3. Machine composition if not expressly indicated in the text, the position num- bers of the machine components refer to figures in the chapters 1.3.5. External components and 1.3.6 internal components. 1.3.1. Models lb 4712 1.3.2. Identification data in the plate the following data of the machine...

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    1.3.6.1. Boiler the boiler is constructed of copper sheet (a). Heat exchangers, connected to the brewing unit, are at- tached to the boiler. Water for coffee brewing is taken di- rectly from the heat exchanger. During brewing, cold water is sent inside of the exchanger by the power pump. Inside the ...

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    1.3.6.3. Automatic water entry system (a.E.A) the automatic water entry system checks the water level in the boiler. The system is composed of: - a probe inserted in the boiler (a) which is composed of a stainless steel rod; - an electronic control unit (b); - the pump allows water pressure to be in...

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    1.3.6.6. Pumping system it is the component that feeds the machine, raising the water pressure to 8-9 bars for coffee brewing and auto- matic filling of the boiler. To set the pressure rating, proceed as follows: - select a coffee dispensing key: - check the water pressure on the machine pressure ga...

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    Adjustments, specifications and illustrations in this ma- nual are based on information available at the moment of the editing and therefore can change anytime. These modifications affect maintenance operations to be car- ried out. Ensure that the updated version of the present manual is being used....

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    Valve group the valves serve to ensure safety and proper machine operation. Safety valve the safety valve serves to eliminate the air in the boiler during the heating of the ma- chine. Pressure relief valve the pressure relief valve ensures that the pressure in the boiler doesn’t exceed 1.9 bars. In...

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    When the pressure is at zero, completely empty the boiler, by opening the specific valve located on the lower part of it. If the above procedure is not correctly carried out, the opening of any part of the hydraulic cir- cuit can cause a sudden outlet of overheat water under pressure. - be careful w...

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    5. Installation and start up 5.1. Unpacking open the packaging, taking care not to damage it. Re- move the machine protections and the equipment con- tained in the package. Take the machine out.. Environment components of the packing must be separated ac- cording to the materials with which they are...

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    5.3. Water connection remove any rubber plugs which may be inserted in the valve fixtures of the softener. Connect the water mains (2) to the softener inlet (8) using the flexible pipe provided. Rinse the resins of the softener and check that the water, which initially comes out yellowish, comes out...

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    5.4. Electric connection connect the machine power cord according to the in- structions shown in “electric diagrams” section. Attention it is recommended to install a protection switch on the electric network. Attention carry out all electric connections with the power supply disconnected. 5.5. Mach...

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    Repeat this operation for the other dose keys. To exit the programming mode, press the stop/prog key (6) or wait 30 seconds. When the programming is completed, place the pro- gramming lever (1) to the off position. Warning each dose should be programmed using a new cap- sule and not one previously u...

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    6.2.2. Dispensing steam to dispense steam, turn the tap knob (8) anticlockwise: the steam coming out from the steam pipe (9) will be proportional to the opening of the tap. Attention before using the steam to warm drinks or froth the milk, it is necessary to dispense steam to comple- tely discharge ...

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    When the set temperature is reached, it is possible to enable steam dispensing again by keeping the frothed hot milk key (2) pressed. Attention before using the steam to warm the beverages or froth the milk, select the steam dispensing to com- pletely discharge the condensation.After each use, dispe...

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    Maintenance manual for technical assistance 15 manual code 10066846 / rel. 0.00 / march 2012 - 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 ...

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    Maintenance manual for technical assistance manual code 10066846 / rel. 0.00 / march 2012 16 7. Diagrams 7.1. Electrical mains connection wiring diagram.

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    Maintenance manual for technical assistance 17 manual code 10066846 / rel. 0.00 / march 2012 7.2. Machine power supply wiring diagram.

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    Maintenance manual for technical assistance manual code 10066846 / rel. 0.00 / march 2012 18 7.3. Wiring diagram of the electronic central unit.

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    Maintenance manual for technical assistance 19 manual code 10066846 / rel. 0.00 / march 2012 7.4. Hydraulic diagram.

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    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 disassemb...

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    8.2.3. Valves once a year, at least, check the correct operation of the safety valve, pressure relief valve and discharge one- way valve. When their replacement is needed, due to a malfunction, retest the new valve installed. Carry out the tests in the following way. Safety valve first test: - remov...

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    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). Then rinse with water. 8.3.2...

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    Maintenance manual for technical assistance 23 manual code 10066846 / rel. 0.00 / march 2012 9. Troubleshooting 9.1. Signalling and solutions to the most common problems problem cause solution no electrical power on the machine. The selector switch is placed to “0” or “1” position. Turn the selector...

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    Maintenance manual for technical assistance manual code 10066846 / rel. 0.00 / march 2012 24 problem cause solution steam mixed with water comes out from pipes the boiler level is too high. Check the level probe for correct po- sition and presence of any surface lime scale. The machine does not disp...

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    Maintenance manual for technical assistance 25 manual code 10066846 / rel. 0.00 / march 2012 problem cause solution the pressure gauge indicates an unacceptable pressure the pressure gauge is defective. Replace the pressure gauge. The boiler calibration is incorrect. Adjust the calibration of the bo...

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    Maintenance manual for technical assistance manual code 10066846 / rel. 0.00 / march 2012 26 problem cause solution the leds of all the keyboard flash. After a few minutes the automatic filling of water stops. Time-out device is activated. Turn the machine off and then back on. No water in mains. Op...

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    Maintenance manual for technical assistance 27 manual code 10066846 / rel. 0.00 / march 2012 problem cause solution the pump works below the nominal capacity the inlet is clogged even partially. Clean the pump filter. The pump rotates in the wrong direction. Check the motor. The pump is not properly...