Schaerer Barista Service Manual
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Schaerer Barista Service Manual

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Schaerer Barista
Service manual
KSS Technical Support
10/2018
Rev.
04

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Summary of Contents for Schaerer Barista

  • Page 1 Schaerer Barista Service manual KSS Technical Support Date 10/2018 Rev.

  • Page 2: Preface

    Attachments • Schaerer Barista Basic beverage settings • Schaerer Barista Software description • Schaerer Barista event and error list Applicable documents Customer documents Technician documents • • Planning information Piping schematics •...

  • Page 3: Change History

    Change history Change history • Rev. 00 Preliminary edition from KVS fall meeting, Nov. 2014 • Rev. 02 1st edition for series launch • Rev. 03 January 2016 edition • Rev. 04 October 2018 Edition...

  • Page 4: Table Of Contents

    Table of Table of Contents Preface ............................................2 Change history ..........................................3 Table of Contents ......................................... 4 Installation and commissioning ..................................6 Customer’s on-site connection requirements ..............................6 Hardware connection and preparatory work ............................... 7 1.2.1 General tasks ........................................7 1.2.2 Recommended water filter ....................................
  • Page 5 Table of Grinders – grinding degree setting ..................................19 Proportional valve proportion calibration ................................20 2.13 Brewing time monitoring ....................................21 2.14 Front panel ........................................23 Safety valve – procedure for performing a functional check ..........................26 2.16 Maintenance concept ..................................... 27 Overview of maintenance activities ..................................

  • Page 6: Installation And Commissioning

    Schaerer Service may only connect the coffee machine to existing prepared connection points. Schaerer Service is neither authorised nor responsible for carrying out any work on-site prior to connection. For details, see the planner information on the website www.schaerer.com...

  • Page 7: Hardware Connection And Preparatory Work

    A water filter is recommended for carbonate hardness above 5 °dKH. For the Schaerer Barista, the – bestmax XL – water filter is recommended in the standard price list. After measuring the carbonate hardness with (non-expired) test kit, cut off according to the capacity table (see the User manual included with the filter).
  • Page 8 Installation and commissioning Requirements: Coffee machine installed and connected to water and power supply. See chapter 1.1 – 1.2.2 Switch on machine, check time / time zone. Change Check Date time / timezone Basic settings where necessary. Confirm date of commissioning. (One-time query when switched on for Confirmation is requested only when switched on for the the first time)
  • Page 9 Installation and commissioning Standard allocation set at the factory 1) Milk 5) Lungo 9) HW small 2) Milk foam / Autosteam 6) Café small / Ristretto 10) HW large 3) Ristretto 7) Café Crème / Espresso 11) Milk foam / Basicsteam 4) Espresso 8) Pott / Lungo The allocation is the same as the standard allocation set at the factory.

  • Page 10: Date

    - see Chapter 2.8 System > Operating options SteamJet, barista pad, brewing time control, display text Inquire about and enter (optionally bean type), milk foam selection, acoustic signal for any customer requests brewing complete, Auto Start USB >...

  • Page 11: Service

    Service Service Clean the distributor sieve The distributor sieve is based on a customer-defined cleaning interval and is described in the User manual. Cleaning the distributor sieve takes just a few easy steps: 1. Remove portafilter 2. Use the cleaning brush to clean the distributor sieve and bayonet joint 3.

  • Page 12: Replace Brewing Piston Seal

    Service Replace brewing piston seal The seal on the brewing piston (O-ring) can be changed by the technician as part of the service maintenance 1. If needed, the seal can be changed by the customer himself. The procedure is described in the User manual.

  • Page 13: Espresso Pump / Water Inlet Pressure Switch -> Low Pressure Operation

    Espresso pump / water inlet pressure switch -> low pressure operation The Schaerer Barista generally comes with an integrated low-pressure-ready balanced espresso pump. This espresso pump, unlike standard non balanced espresso pumps, controls the brewing pressure to the set level, regardless of the pump inlet pressure.
  • Page 14 Service Important technical service instructions / note to customer • The espresso pump is NOT self-sucking • Risk of damage to the espresso pump when running empty • The coffee machine must therefore have an upstream pressure on the line side of 0.5 bar. This means: ...

  • Page 15: Espresso Pump - Setting The Brewing Pressure

    Service Espresso pump - Setting the brewing pressure The pump/brewing pressure is factory set to 9/+0.5 bar. If a new espresso pump is being installed or if the desired brewing pressure is different from the setting, then this can easily be adjusted via the front access panel. Level of disassembly - right drip grid and drip tray, rear cover Machine is ready for operation Setting the brewing pressure...

  • Page 16: Set Pressure Reducer

    Service Set pressure reducer The pressure manometer 33 2745 3000 (with aperture 1.1) can be used to check and adjust the output pressure of the pressure reducer. Requirements: The water system and steam boiler are depressurized (according to the routine), the main water tap is closed, the machine is disconnected from the power grid.

  • Page 17: Power Class

    Service Power Class The "Power Class" considers the country-specific heating output versions of the machine, the connection configuration at the grid power terminal, and the cur- rent protection on the supply grid side. The Power Class is therefore useful for optimizing utilization and ensuring machine functionality.

  • Page 18: Grinders - Grinding Degree And Motor Cooling

    See attachment Schaerer Barista - Basic beverage settings With specially hardened grinder disks and the powerful grinder motor, these grinders can achieve a very fine grinding degree, with a grain size distribution down to a minimum of 190 µm.

  • Page 19: Grinders - Grinding Degree Setting

    2nd mark. (see illustration 3) 7. Attach the grinder Important technical service instructions Finally, adjust the grinding degree again to match the customer-specified type of bean and beverage. See Attachment: Schaerer Barista - Basic beverage settings Illustration 3...

  • Page 20: Proportional Valve Proportion Calibration

    Service Proportional valve proportion calibration Given the heavy temperature fluctuations at the start of brewing cycle, the initial opening path of the proportional valve can be adjusted via the mixing calibration (=cold water mixing amount) as follows • Example for determining the temperature Start beverage difference: •...

  • Page 21: Brewing Time Monitoring

    Service Brewing time monitoring Description of basic functions • If brewing time monitoring is activated and larger deviations arise between the ACTUAL and the TARGET contact time (contact time= pre- treatment time + brewing time), the customer sees an animated request to set the grinding degree coarser or finer and confirm the adjustments. •...
  • Page 22 • Marking the "reference beverage"/setting the "TARGET contact time – see document: "Schaerer Barista Basic beverage settings" To make sure that the brewing time monitoring steps in as precisely as possible, the most frequently served beverage recipe is marked as the reference beverage for each brewing group. Usually this is the 1x Espresso or 1x Café Crème.

  • Page 23: Front Panel

    Service Front panel The following components are installed on the front panel: • CPU (on CPU-power board) • Plug-in board/SD card = Primary storage medium for: Machine software (firmware) Customer memory / Service memory / Working memory Important technical service instructions: If the front panel is replaced, the plug-in board/SD card from the defective front panel must be installed in the replacement front panel.
  • Page 24 Service • Power stage (on CPU-power board) • 10-pin plug 30 V outputs for grinders, brewer drives, cup storage heater • 96-pin plug 5 V / 24 V inputs and outputs for valves, flow meter, microswitches, etc. Note: All outputs are short-circuit proofed with the exception of the brewer drives The outputs for the brewer motors are non-blocking which means they can withstand high currents for a longer period of time but are damaged by short circuit.
  • Page 25 Service Connector – serial adapter Slot for "internal backup of USB stick" board Central 96-pin plug Slot of "external USB stick" (for left-hand in- sertion underneath the cup storage) Power supply from the 10- pin power connector for 30V components switched- mode power supply "internal USB backup stick"...

  • Page 26: Safety Valve - Procedure For Performing A Functional Check

    Service Safety valve – procedure for performing a functional check The safety valve is screwed onto the steam boiler via a pipe end. The pipe end is dimensioned so that the valve seal is exposed to a temperature load less than 80 °C. If functioning normally, the valve need not be replaced during the entire service life of the coffee machine. Important technical service instructions: The safety valve must undergo a functional check at least 1 x year.

  • Page 27: Maintenance Concept

    Overview of maintenance activities The following maintenance concept based on time-/serving-dependent cycles, describes the minimum scope of maintenance activities as recommended by Schaerer. Please also take into account the special terms arising from the service agreements and local factors (which may make earlier descaling of the flow heater or checking the grinders when necessary).

  • Page 28: 3.1.1 Installation Of Maintenance Packages Required For Different Brewing Times

    Maintenance concept 3.1.1 Installation of maintenance packages required for different brewing times...

  • Page 29: Maintenance Packages

    Maintenance concept Maintenance packages Service maintenance 1 33 2893 8000 Illustration (not to scale) Module Designation Order number Number Brewer O-ring (distributor sieve) 33 2675 5000 Portafilter Insulation insert 33 2681 3000 Portafilter Screen retaining ring (spring) 33 2672 5000 Basic Steam O-ring (steam nozzle) 33 0398 4000...
  • Page 30 Maintenance concept Service maintenance 2 33 2893 9000 Illustration (not to scale) Module Designation Order number Number Brewer Brewing piston, compl. 33 2897 2099 Coffee / hydraulics Brewing valve socket 33 2400 8000 Ventilation / cooling 33 2617 5000 Coffee / hydraulics Release valve socket 33 2274 5000 Socket for linked valves...

  • Page 31: Descaling

    Maintenance concept Descaling The flow heater and steam boiler are descaled using two separate, display-guided descaling routines. The descaling kit with 5 litres descaling canister is required for this purpose. Brief description of the display-guided descaling routine: • Start the descaling routine - follow the descaling instructions supplied with the descaling kit! •...

  • Page 32: Pressure Release Routine

    Maintenance concept Pressure release routine Before working on the boiler system, the display-guided pressure release routine must be carried out. This is for your own safety, because if the pressure in the steam boiler is not relieved, various lines and valves will be under up to 1.5 bar of pressure. As soon as the routine starts, the system pressure is relieved via the hot water spout (pressure relief can be tracked on the display and the manometer in the front panel).

  • Page 33: Special Tools And Aids

    Maintenance concept Special tools and aids Illustration (not to scale) Stick Item number 33 2492 5000 Formatting • The USB stick must be FAT32 formatted Maximum dimensions • In order to ensure that the hopper cover can close, the outer dimensions should not exceed 52 x 14 x 5.5. The USB stick meets this requirements.

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