WMF Schaerer Coffee Art Service Manual
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WMF Schaerer Coffee Art Service Manual

WMF Schaerer Coffee Art Service Manual

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Summary of Contents for WMF Schaerer Coffee Art

  • Page 1 Schaerer Coffee Art Service Manual...

  • Page 2: Table Of Contents

    Table of Contents Section Page Safety Warnings Revision Control Model Descriptions Chart Front View Internal Layout Major Components Main Board Parts Replacements Common Repair Tools USB Structuring Event & Error List...

  • Page 3: Safety Warnings

    Safety Warnings General Safety Instructions CAUTION: The warnings throughout this document are listed here and you must famil- iarize yourself before opening, maintaining, or servicing the coffee machine. Risk of electrocution—Components carrying mains voltage The coffee machine is not fully disconnected from mains voltage when only switched off. Prior to any internal work be sure to disconnect the power cord from the mains supply.
  • Page 4 Safety Warnings...

  • Page 5: Revision Control

    Revision Control • Revision 20210514 — First edition 14 May, 2021 • Revision 20220418 — Corrected machine offerings for model 51 on pg. 6 Added Front Grinder Relay on pg. 49 Added header callout on pg. 51 for front grinder relay Corrections applied to pg.

  • Page 6: Model Descriptions Chart

    Coffee Art Model Descriptions Chart 040381-00050EUS 040381-00090EUS 040381-00021EUS...

  • Page 7: Front View

    Front View Bean Hoppers Tablet Chute Stop / Cancel Button Cleaning Button LCD Display Service Card Slot Power Button Front Panel Left External Buttons Right External Buttons Left Panel Product Buttons Steam Wand Handle Hot Water Wand Steam Wand (PEEK) Right Side Panel Steam Tip (PEEK) Pressure Gauge...

  • Page 8: Internal Layout

    Internal Layout: Right Side View (SCA Coffee) 1. Coffee Boiler 1L 3kW 7. Heat Exchanger Supply 11. Safety Switches Terminal Valve (flushes to drip tray) Block (30VDC) 2. Incoming Water Supply 8. Flush Valve 12. Right Grinder 3. Pump & Motor 9.
  • Page 9 Internal Layout: Right Side View SCA Plus (Espresso) 1. Coffee Boiler 0.8L 3kW 7. Flush Valve 11. Right Grinder 2. Overpressure Valve 8. Klixon 155’C 12. Pressure Gauge 3. Pump & Motor 9. Pump Motor Terminal 13. Incoming Water Supply Block (230VAC) 4.
  • Page 10 Internal Layout: Left Side View (SCA Coffee) 1. Power Cord 7. Left Grinder 2. Mains Terminal Block 8. Heat Exchanger Waste Water Flow Regulator 3. Main Board 9. 36VDC Automat Motor 4. Power Supply 10. GFCI Switch 5. Front Grinder Relay 6.
  • Page 11 Internal Layout: Left Side View SCA Plus (Espresso) 1. Power Cord 5. Steam Boiler 1L 2 x 3kW (6kW) 2. Mains Terminal Block 6. GFCI Switch 3. Main Board 7. Left Grinder 4. Power Supply 8. 36VDC Automat Motor...
  • Page 12 Internal Layout: Top View SCA Coffee 1. Automat Motor 8. Hot Water Valve 2. Heat Exchanger 9. Brew Valve 3. Left Grinder 10. Diverter Valve (iced / hot coffee) 4. Right Grinder 11. Overpressure Valve 5. Front Grinder 12. Outlet Manifold 6.
  • Page 13 Internal Layout: Top View SCA Plus (Espresso) 1. Automat Motor 8. Overpressure Valve 2. Left Grinder 9. Coffee Boiler Outlet Manifold 3. Right Grinder 10. Steam Valve 4. Automat 11. Air Delivery Valve (2/2-way) 5. Grinder Adjustment Gear 12. Air Delivery Valve (3/2-way) 6.
  • Page 14 Internal Layout: Rear View SCA Coffee 1. Air Pump 10. Back Panel 2. Air Restrictor Valve (old location) 11. Non-valved Water Supply to Heat Exchanger 3. Air Valve 12. Valved Water Supply to Heat Exchanger 4. GFCI Switch 13. Water Supply Heat Exchanger to Coffee 5.
  • Page 15 Internal Layout: Rear View SCA Plus (Espresso) 1. GFCI Switch 8. Right Grinder 2. Fan Connector 9. Steam Boiler Inlet Tube 3. Water Pump 10. Fans 4. Telemetry Cable 11. Telemetry Antenna 5. Flowmeter 12. Telemetry Module 6. Automat Motor 13.
  • Page 16 Internal Layout: Outlet Frame SCA Coffee 1. Hot Water Wand 6. Hot Water Delivery Tube 2. Hot Coffee Delivery Tube 7. Outlet Manifold 3. Cold Coffee Delivery Tube 8. Coffee Spout 4. Front Grinder 9. Cold Bypass Delivery Tube (not shown) or Plug 5.
  • Page 17 Internal Layout: Outlet Frame SCA Coffee (Thermos) 1. Hot Water Wand 4. Front Grinder 2. Hi / Center Spout Diverter Valve 5. Center Spout Coffee Delivery Tube 3. Hi Spout Coffee Delivery Tube 6. Hot Water Delivery Tube...
  • Page 18 Internal Layout: Outlet Frame SCA Plus (Espresso) 1. Steam Wand 7. Hot Water Delivery Tube 2. Hot Water Wand 8. Steam Delivery Tube 3. Air Restrictor Valve 9. 3/2 way Vacuum Breaker Valve 4. Air Pump 10. 3/2 way Air Valve 5.
  • Page 19 Internal Layout: Electronic Components (Coffee) 1. Main Board 2. Power Supply 3. Main Terminal Block 4. Power Cord 5. GFCI Switch 6. PCB Extension Control Unit (model 71 cup sensor)
  • Page 20 Internal Layout: Safety Switches 1. Center Plate Magnetic Conditions for Replacement for Flush Valve Read Switch Every 75,000 shots dispensed • 2. Grounds Bin Magnetic Clogged with coffee grounds (usually found while trouble- • Read Switch shooting inconsistent brew times and intermittent water 3.
  • Page 21 Internal Layout: Front Panel (Touch Screen) 1. Touch Screen 2. External Buttons CAN node 3. External Buttons 4. Card Reader Slot 5. External USB Port 6. Card Reader CAN node 7. Card Reader 8. Internal USB Port 9. Card Reader commu- nication cable 10.
  • Page 22 Internal Layout: Thermos Front Panel (Coffee) 1. Touch Screen 2. Card Reader Slot 3. Hi Capacity Coffee Spout (Thermos) 4. Center Coffee Spout 5. Hot Water Wand 6. Cup Sensor 7. Sensor Sensitivity Adjustment Screw 8. Coffee Delivery Tube 9. Outlet Manifold 10.

  • Page 23: Major Components

    Major Components: Coffee Boiler SCA Plus (Espresso) 1. Coffee Boiler (0.8L 3kW) 2. Klixon 155C (2 per element) 3. Klixon Support 4. Heating Element + wires 5. Temperature Sensor (NTC) 6. Inlet Pipe 7. Fiber Gasket (prevents seiz- ing of the nut and bracket) 8.
  • Page 24 Major Components: Coffee Boiler SCA Coffee 1. Coffee Boiler (1.0L 3kW) 2. Klixon 155C (2 per element) 3. Klixon Support 4. Heating Element + wires 5. Temperature Sensor (NTC) 6. Inlet Pipe 7. Fiber Gasket (prevents seiz- ing of the nut and bracket) 8.
  • Page 25 Major Components: Coffee Boiler Operation (Coffee & Espresso) Overpressure valve Overpressure valve First filling Empty boiler The empty boiler must be filled before it can be The perforated inlet pipe introduces water into heated. If the element is heated before water is the system without the use of any solenoid introduced it will likely cause damage.
  • Page 26 Major Components: Coffee Boiler Operation (Coffee & Espresso) Overpressure valve Overpressure valve As the temperature rises the water will ex- The temperature probe reads the rise in temper- ature and should stop at the appropriate set pand increasing the pressure inside the boil- temperature.
  • Page 27 Major Components: Steam Boiler SCA Plus (Espresso) 1. Steam Boiler (1L 2 x 3kW) 2. Klixon 155C (2 per element) 3. Klixon Support 4. Heating Element + wires 5. Temperature Sensor (NTC) 6. Level Probe 7. Inlet Pipe 8. Fiber Gasket (prevents seizing of the nut and bracket) 9.
  • Page 28 Major Components: Steam Boiler Operation Overpressure valve Overpressure valve The empty boiler must be filled before it can be The system will prompt for a fill up when started heated. If the element is heated before water is for the first time or when you perform a water introduced it will likely cause damage.
  • Page 29 Major Components: Steam Boiler Operation Overpressure valve Overpressure valve The steam will now pressurize the piping until When the steam button is pressed the steam the steam and overpressure valves. valve will energize and the steam will egress through the steam wand. Overpressure valve Overpressure valve During this process you will lose some water in...
  • Page 30 Major Components: Steam Outlet (Espresso) To steam boiler 1. Steam valve (2/2 way valve) (see below) 2. Overpressure valve (12bar) 3. Vacuum breaker valve (3/2 way valve) (see 8. Steam wand complete below) (without support block) 4. Steam wand temperature probe (NTC) 9.
  • Page 31 Major Components: Air Injection System (Espresso) 1. Steam boiler inlet pipe 5. Air pump 2. 2/2 way air valve 6. Air restrictor valve 3. 3/2 way air valve 7. Air Filter 4. Silicon hose for air delivery In order to create foam with the touch of a button the air is delivered to the steam boiler through the inlet pipe.
  • Page 32 Major Components: 2/2-Way Valve Operation 2/2 way valve P = Pressure | A = Atmosphere Coil Valve body Medium enters the P side of When the valve is to open the coil the valve and encompasses energizes with 30v DC and creates an Valve shaft Valve seat the plunger.
  • Page 33 Major Components: 3/2-Way Valve Operation 3/2 way valve P = Pressure | A = Atmosphere | R = Relief Coil Valve body Medium enters the P side of When the valve is to open the coil the valve and stops at the energizes with 30v DC and creates an Valve shaft Valve seat...
  • Page 34 Major Components: Water Pump Old style New style 1. Capacitor 6. Pump Motor 2. Pump Head 7. Outgoing Elbow 3. Pressure Adjustment Screw 8. Tube to Flowmeter PTFE 8x6mm 4. Check Valve 9. Incoming Water Supply 5. Pressure Regulator (C models only) 10.
  • Page 35 Major Components: Water Pump Operation Water is introduced through the inlet (right) side of the pump head. As the motor spins the rotor the pressure is increased ac- cording to the setting of the adjusting spring tension. The tension of the adjusting spring can be changed by making changes to the adjusting screw.
  • Page 36 Major Components: Flowmeter The flowmeter is fastened to a bracket against the automat compartment wall with 2 x 3mm hex screws. Its location is above the pump head, to the right of the two terminal blocks. The two screws can be accessed from underneath the flowmeter with a 3mm hex key.
  • Page 37 Major Components: Check Valves The ball is pushed against an The medium is introduced When pressure builds on the oring by the spring and will not through the inlet side of the outlet side of the check valve it allow anything to pass from the check valve and pushes the ball will push against the ball and opposite direction...
  • Page 38 Major Components: Flow Restrictors...
  • Page 39 Major Components: 16-Gram Automat (Espresso) The check ball and oring are placed on the upper piston outlet stem to prevent leak- ing and backflow of coffee into the upper piston. This oring seals the inlet elbow to the brew chamber. Coffee Funnel Lower Piston Retaining Ring Coffee Chute...
  • Page 40 Major Components: 30-Gram Automat (Coffee) This oring seals the inlet elbow to the brew chamber. Upper Piston Coffee Funnel Lower Piston Retaining Ring Coffee Chute Lower Piston Flange Brew Chamber Inlet Tube and Elbow Upper Piston w/ oring (2.5mm orifice) Check Ball Spindle Oring...
  • Page 41 Major Components: Automat (30g & 16g) 30g Automat (coffee) 16g Automat (espresso) Conditions for Replacement - 30g Automat Conditions for Replacement - 16g Automat • Every 75,000 Shots dispensed • Every 75,000 Shots dispensed Warped brew chamber Warped brew chamber •...
  • Page 42 Major Components: Automat Operation The automat starts in the home The grinder actuates and coffee Once the desired amount of coffee position with a gap in the brew grounds fall through the funnel is ground the grinder turns off. chamber to allow for coffee and chute into the brew chamber.
  • Page 43 Major Components: Automat Operation Once the automat reaches the brewing position and the appropriate pressure is applied to the coffee grounds the brew and flush valves are energized. This allows hot water to flow into the brew chamber and wet the grounds. The upper piston has a 0.6mm orifice which creates a back pressure to ensure the entire puck of coffee is extracted...
  • Page 44 Major Components: Automat Operation The automat motor will now drive Once the lower piston reaches the The scraper then swings forward the brew unit the opposite lower piston flange it is pushed to expel the spent coffee puck into direction upwards inside the brew chamber the grounds bin.
  • Page 45 Major Components: Grinder 1. 24 VDC motor 2. Grinder adjust gear 3. Grinder outlet 4. Upper grinder blade (larger internal diameter) 5. Lower grinder blade (smaller internal diameter) 6. Upper burr 7. Grinder adjustment ring 8. Spring (used as an auger) 9.
  • Page 46 Major Components: Grinding Mills The illustration above shows brand new grinding mills (#1 & 2), whereas 3 & 4 are dull and worn out. The worn out 24 V DC Nominal voltage: grinding mills will cause is- sues with coffee quality. The 30 V DC Operating voltage: beans are no longer consist-...
  • Page 47 Major Components: Grinding Mills & Motor Conditions for Replacement - Grinder Motor Conditions for Replacement - Grinding Discs Every 75,000 Shots dispensed from a single Every 75,000 Shots dispensed from a single • • grinder grinder • It is recommended to replace the Grinder Motor •...
  • Page 48 Major Components: Grinder Operation When beans are introduced the auger assists the grinder with a constant flow of beans into the blades. The beans start grinding course and get finer as the blades are tapered by design. By rotating the adjustment gear clockwise you make the grounds finer.
  • Page 49 Major Components: Front Grinder Relay (SCA C) When the front grinder is present (Coffee Art C only), the right grinder wiring is supplied to the relay and the relay is always closed to the Red and Brown wires to the right grinder. When a recipe is chosen which utiliz- es the front grinder, the relay coil is energized via green and brown with 29VDC and switches to the pole positions for Red and Pink.
  • Page 50 Major Components: Automat Motor 36V 1. 36v Automat Motor 2. Automat Motor Bracket 3. Screw 4. Motor Gear 5. Retaining Screw 6. Locking Screw 7. Automat Outlet Elbow Retaining Tab 8. Outlet Tube Guide 9. Completed 36v Automat Motor Conditions for Replacement - Automat Motor History of Brew Unit Timeout error codes in the info screen •...

  • Page 51: Main Board

    Main Board: Layout 1. Main Board 11. Button interface headers 19. CPU communication header 2. Relay Board 12. Card reader header 20. Steam boiler temp sensor / level probe header 3. CPU 13. Booster sensor header (requires jumper in US) 21.
  • Page 52 Main Board: Pin-outs...

  • Page 53: Parts Replacements

    Parts Replacement Instructions: Steam Boiler Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 3.
  • Page 54 Parts Replacement Instructions: Steam Boiler Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 11.
  • Page 55 Parts Replacement Instructions: Steam Boiler Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 19.
  • Page 56 Parts Replacement Instructions: Steam Boiler Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 26.
  • Page 57 Parts Replacement Instructions: Coffee Boiler Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 3.
  • Page 58 Parts Replacement Instructions: Coffee Boiler Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 10.
  • Page 59 Parts Replacement Instructions: Automat Motor Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 1.
  • Page 60 Parts Replacement Instructions: Grinder Blades & Motor Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 1.
  • Page 61 Parts Replacement Instructions: Grinder Blades & Motor Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety Smaller diameter 12.
  • Page 62 Parts Replacement Instructions: Flush Valve Note 1: All Instructions assume basic removal of necessary panels is already completed and machine is in a safe mode for maintenance (Power and Water in correct status for particular maintenance operation) Note 2: Before beginning this operation, turn water off to the machine and perform an empty cycle to ensure safety 1.

  • Page 63: Common Repair Tools

    Common Repair Tools Short Schaerer Hex Screwdriver Part number: 3370065320 Long Schaerer Hex Screwdriver Part number: 3370065321 Food Grade Lubricant Part Number: 3370067399 Thermal Paste (for Klixons) Part Number: 3370067391 Automat Adjustment Knob Part Number: 3370062985 Save Data USB Stick (512MB) Part Number: 3370071917 Service Card Part Number: 3370063935...

  • Page 64: Usb Structuring

    USB Structuring The following are instructions to make sure your USB is set correctly: Please make sure to place all files extracted into a USB drive (Maximum capacity 8GB ) If need be, format the USB to either FAT, or FAT32 Step 1) Download and locate Zip file.
  • Page 65 USB Structuring Cont. Step 5) Right-click in an open space as shown below Step 6) After successful completion, your new fold- and paste the files/folders into the flash drive (USB ers are saved under (USB DRIVE). DRIVE). Frack Pack Recipe - Customer specific recipes Planogram - Machine layout on the counter These two are for printing and reference during the customer visit.

  • Page 66: Event & Error List

    Event & Error List Displayed Message Cause What to do Water Flow Error While dispensing a beverage, the flowmeter transmits fewer than the pre-defined num- The water flow error is only shown in the first ber of pulses. Possible blockage in the hy- 5 sec if the flow quantity is less than 1ml/3 sec draulic system.
  • Page 67 Event & Error List Displayed Message Cause What to do Brew Unit Timeout The positions of the brew chamber are de- tected by measuring the current consump- tion. The following two positions are detect- ed by means of a current consumption If a current consumption peak is not detected peak: after a brew chamber movement of 10 sec,...
  • Page 68 Event & Error List Displayed Mes- Cause What to do sage Check the electrical connection between the sensor and main board Coffee Sensor The main board does not Measure resistance of the NTC sensor. Defect detect a resistance Steam Sensor through the sensor.
  • Page 69 Event & Error List Displayed Message Cause What to do Over temperature coffee A boiler temp of 110'C or higher was detect- ed. If the raised temperature persists, the Klixon is triggered Temperature sensor (NTC) is faulty. Check the electrical connection between the sensor and main board Measure resistance of the NTC sensor.
  • Page 70 Event & Error List Displayed Message Cause What to do Timeout Steam Supply The level in the steam boiler detected by the level monitoring is too low. This causes the boiler filling to begin. Filling was not If a level increase is not detected after steam detected by the level sensor after 60 sec.
  • Page 71 Event & Error List Displayed Message Cause What to do Steam temperature too The sensor for temperature monitoring at the steam boiler detects a lower tempera- ture than 115'C. The standard setting of the steam tempera- Dispensing of the beverage is stopped to ture is 135'C prevent milk from entering the steam sys- tem.
  • Page 72 Event & Error List Displayed Message Cause What to do Empty grounds container The grounds container is full or almost full. Grounds container full If the grounds container is almost full you The grounds container must be removed for can continue to produce beverages. If the no less than 4 seonds.
  • Page 73 Event & Error List Displayed Message Cause What to do Clean Machine A cleaning request (Mandatory setting) is Clean if necessary. set in the Date / Time / Alarm menu. The message appears in accordance with the settings. Beverages can still be dispensed. A cleaning request (Message Only setting) is Confirm the message and clean if necessary set in the Date / Time / Alarm menu.
  • Page 74 Event & Error List Displayed Message Cause What to do Heating Coffee The current temperature in the coffee boiler is Water more than 8'C below the set temperature. Dis- pensing of coffee beverages is blocked. The boiler element is switched on The message should disappear after a short time (once the boiler heats to set temp.) The machine was switched off for an extended...
  • Page 75 Event & Error List Displayed Message Cause What to do Front Panel Missing The center plate above the grounds bin is Reinstall the center plate missing The magnet on the inner right side of the Replace the magnet center plate is missing. The magnet is no longer magnetized Replace the magnet The magnetic read switch is no longer rec-...
  • Page 76 See display message SYS_ERROR_1 See display message SYS_ERROR_1 SEB PROFESSIONAL NORTH AMERICA SEB PROFESSIONAL NORTH AMERICA Wilbur Curtis Company WMF & Schaerer WMF Cruise Line 6913 Acco St 15501 Red Hill Avenue, Suite 200 5601 Powerline Road, Suite 203 Montebello, California 90640, USA...

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