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WMF espresso

Service manual

KMR Technical Support
Revision: 02/2016
Rev. 03

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Содержание espresso

Страница 1: ...WMF espresso Service manual KMR Technical Support Revision 02 2016 Rev 03 ...

Страница 2: ... description WMF espresso event and error list Applicable documents Customer documents Planning information User manual Technician documents Piping schematics Electrical schematics Wiring schematics Spare parts lists Technical circulars Note for technicians These documents are subject to change Please try to keep these documents up to date Planned contents which is awaiting implementation remain u...

Страница 3: ...Change history 3 Change history Rev 00 Preliminary edition from KVS fall meeting Nov 2014 Rev 02 1st edition for series launch Rev 03 January 2016 edition ...

Страница 4: ... Recommended water filter 7 1 3 Initial commissioning workflow 7 2 Service 11 2 1 Clean the distributor sieve 11 2 2 Clean the ground coffee chute 11 2 3 Replace brewing piston seal 12 2 4 Replace brewing piston 12 2 5 Espresso pump Setting the brewing pressure 13 2 6 Espresso pump low pressure ready 14 2 7 Set pressure reducer 15 2 8 Set the hot water temperature 15 2 9 Power Class 16 2 10 Grinde...

Страница 5: ... 20 2 15 Front panel 21 2 16 Safety valve Procedure for performing a functional check 24 3 Maintenance concept 25 3 1 Overview of maintenance activities 25 3 1 1 Installation of maintenance packages required for different brewing times 26 3 2 Maintenance packages 27 3 3 Descaling Preliminary 29 3 4 Pressure release routine 30 3 5 Boiler pressure check 30 3 6 Special tools and aids 31 ...

Страница 6: ...e owner operator The work must be carried out by authorised installation technicians in compliance with general country specific and local regulations The WMF Service engineers may only connect the coffee machine to existing prepared connection points WMF Service is neither authorised nor responsible for carrying out any work on site prior to connection For details see the planning information on ...

Страница 7: ... see the next chapter Connect the drain hose to a permanent drain tube using angle 33 2165 8000 All drains must be sloped Connect to the power supply Switch on the coffee machine 1 2 2 Recommended water filter A WMF water filter is recommended for carbonate hardness above 5 dKH For the WMF espresso the bestmax XL water filter is recommended in the standard WMF price list After measuring the carbon...

Страница 8: ...n The date can NOT be changed later The machine fills up automatically and heats up Language selection System Language Enter the measured water hardness on the information pad Activate any pre rinsed water filter under System and enter the filter capacity taken from the cutting table System Water filter Service PIN must be entered Check machine options and correct if necessary Power Class Low pres...

Страница 9: ... groups are preconfigured for espresso beverages Because the beverage buttons on this machine are permanently assigned to the grinder above them customer clarification is required in advance with respect to what type of bean should be used in which bean hopper or which beverages should be dispensed with which brewing group Only when this is complete can the beverage and recipe settings be made see...

Страница 10: ...er see Chapter 2 8 SteamJet barista pad brewing time control display text op tionally bean type milk foam selection acoustic signal for brewing complete Auto Start System operating options Save to the USB stick Save in service memory USB Data back up Service Machine data Defaults Customer Service See WMF espresso user manual WMF espresso Software description part 1 Set the service date delete the ...

Страница 11: ... to clean the distributor sieve and bayonet joint 3 Rinse distributor sieve 2 2 Clean the ground coffee chute The ground coffee chute is cleaned based on a customer defined cleaning interval and is described in the User manual Cleaning the ground coffee chute takes just a few easy steps 1 Start cleaning the ground coffee chute Care Clean the ground coffee chute Group left or right 2 Follow the ani...

Страница 12: ...rtafilter 2 4 Replace brewing piston The brewing piston is changed out by the technician as part of the service maintenance 2 Replacing the brewing piston takes just a few easy steps 1 Open the Service menu Service Service routines Piston change Group left or right 2 Follow the animation and change the brewing piston 3 Replace the portafilter Important note for technicians To drive down the brewin...

Страница 13: ... the desired brewing pressure using the bypass screw Clockwise Increased brewing pressure Counter clockwise Reduced brewing pressure Target pressure should be at 9 bar max 10 bar Check settings by initiating an espresso three times Important note for technicians The system and its components are designed for a maximum of 10 bar This pressure must not be exceeded The maximum water pressure occurs d...

Страница 14: ...ffee and when filling the boiler and for hot water servings Important note for technicians Note to customer The espresso pump is NOT self priming If the espresso pump runs dry there is a risk that it will be damaged The coffee machine must therefore have an upstream pressure on the line side of 0 2 bar This means Under no circumstances must the coffee machine be operated with an external tank whic...

Страница 15: ...ere illustration 3 Open water supply valve o For the low pressure option the power must be switched on here and the espresso pump must be actuated by the software under Service Component test Water system Espresso pump Adjust the pressure reducer by turning the adjustment screw to 2 4 0 1 bar Close water tap Remove the pressure manometer attach the hose plug in nipple again replace the pressure ma...

Страница 16: ...emperatures Heating and reheating thresholds based on heat output Important note for technicians Therefore the software adjustable Power Class MUST always match the rating plate indication If this is not adhered to then errors specific to the heating time for example or undesired deviations temperature fluctuations in the beverages can occur In the worst case this can trip a customer s on site cir...

Страница 17: ...ng commissioning of the machine See Attachment WMF espresso 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 190µm Factory settings Grinding degree 3 approx 1 6 g s and a grain size distribution of about 280µm Menu Service Service routines Idle curr...

Страница 18: ...Mark Basic setting on the gear ring see illustration 2 5 Turn the adjustment gearbox until the two white dots on the black housing of the adjustment gearbox and its gear ring are aligned to each other see illustra tion 3 6 Carefully place the grinder on the motor and make sure of the following that the gear ring on the grinder loosely engages with the teeth of the ad justment drive that the gear r...

Страница 19: ...t temperature configured in the recipe Observe the max and min temperature With larger deviations between the target and max min configure this difference temperature Service Service routines Mixing calibration lower Repeat the procedure until the temperature has leveled out to 2 C Example for determining the temperature difference First value displayed target temperature configured in the recipe ...

Страница 20: ... grinding degree too coarse Animation requires that you set the grinding degree to be more fine by one notch Since changing the grinding degree changes the Ground coffee quantity used the grinding time is adjusted by the software in order to retain the con figured grinding volume g This adjustment however is only complete when the grinding degree is ONLY actually changed by one notch AND this was ...

Страница 21: ...rrors indicate that the plug in board SD card is defective Machine does not boot does not start or hangs up after switching on Machine hangs up during operation switching the machine OFF ON has no effect disconnecting the machine from the power grid for at least 5 min has no effect In case of doubt therefore the SD card must be replaced BEFORE replacing the front panel A query routine starts autom...

Страница 22: ... meter microswitches etc Note All outputs with the exception of the brewer drive are short circuit protected The outputs for the brewer drive are rated for lock up that is they can withstand high currents for a longer period of time but will be destroyed by a short circuit Side boards for hot water and auto steam buttons Below is an illustration of the listed components ...

Страница 23: ... adapter board Central 96 pole plug Power supply from the switched mode power supply internal USB backup stick Slot for internal backup of USB stick Slot of external USB stick for left hand in sertion underneath the cup storage 10 pin power connector for 30V components o Plug in board o SD card o Internal USB backup stick ...

Страница 24: ...ses in which the safety valve was triggered the safety valve will need to be replaced because its seal may be damaged Functional check venting instructions Disassemble to the level shown Top cover and rear cover The function is to be carried out at operating pressure Gently unscrew the knurled nut on the safety valve 1 2 to max 1 turn max until steam escapes Afterwards immediately tighten already ...

Страница 25: ...tion Maintenance package Maintenance cycle Items needed Service maintenance 1 SM 1 after 15 000 brewing cycles or 1x annually 33 2893 8000 Service maintenance 2 SM 2 every 2 years 33 2893 9000 Safety valve functional check 1 x annually for details see chapter 2 2 4 Descaling flow heater 1 x annually 100 g Special deposit removal solution 33 0680 80000 Descaling steam boiler every 2 years 10 000 li...

Страница 26: ...Maintenance concept 26 3 1 1 Installation of maintenance packages required for different brewing times ...

Страница 27: ... No Designation Order number Count Illustration not to scale Brewer 1 O ring distributor sieve 33 2675 5000 2 Portafilter 2 Insulation insert 33 2681 3000 3 Portafilter 3 Screen retaining ring spring 33 2672 5000 3 Basic Steam 4 O ring steam nozzle 33 0398 4000 1 Autosteam 5 O ring steam nozzle 33 0395 3000 1 Brewer 6 Brewing piston distributor sieve 33 2671 0000 2 Brewer 7 Control curve 33 2685 8...

Страница 28: ...ng valve 33 2273 9000 1 Hot water hydraulics 8 O Ring water filter 33 2283 2000 1 Hot water hydraulics 9 Water filter sieve 33 1509 2000 1 Coffee hydraulics 10 NTC cold water mix in O ring 33 2534 8000 2 Hot water hydraulics 11 Reducer water filter 33 2354 1000 1 Note for technicians Service maintenance 2 coincides with descaling of the steam boiler During the descaling of the steam boiler the wat...

Страница 29: ...tap Pressure reduction water infeed running Remove the drip grid and drip tray Remove sheet metal cover see illustration 1 Place the hose from the descaling pump on the connection nipple see piping diagram excerpt Reinsert the drip tray and replace the steam plate SteamJet Place the drain tube 00 0048 0041 290 mm over the HW spout splash protection Important note for technicians for descaling Beca...

Страница 30: ...heck must be performed as part of the Every 2 years service maintenance Service Service routines Boiler pressure check The boiler pressure check has made the previous boiler inspection to be performed every 2 years much simpler as the boiler insulation no longer needs to be re moved for this purpose The boiler pressure check must be performed using the WMF test fittings These test fittings include...

Страница 31: ...e WMF USB stick meets this requirements Descaling Descaling pump Item number 33 1878 3000 Drain tube 290 mm 00 0048 0041 Splash protection for placing over the HW spout during descaling Pressure manometer Item number 33 2745 3000 1 m hose also required Pressure manometer for adjusting the pressure reducer Boiler pressure test fitting Item number 33 2911 6000 USB mouse keyboard To simplify touchscr...

Страница 32: ...Table of contents 32 ...

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