WMF 800 User manual

Table of Contents
© WMF 800 / 900 / 1000 S / 1000pro S Edition 07/2014 - KMT T0-1
Contents SH WMF 800 / 900 / 1000 S / 1000 pro S
Notes for using the manual
Hazard notices
Part 1 Technical information
1/1 Technical information WMF800 / 900 T1-3
1/2 Technical information WMF1000S / 1000proS T1-4
1/3 Views T1-6
1/3.1 WMF800 / 900 ............................................................T1-6
1/3.2 Views WMF1000S / 1000proS ..............................................T1-7
1/4 Water filter T1-8
1/4.1 Water filter 100for WMF800 / 900and 1000S / 1000proS ......................T1-8
1/4.2 Water filter 200for WMF900 and WMF1000S / 1000proS ......................T1-8
1/4.3 Water filter adapter. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T1-9
Part 2 Engineering
2/1 Grinder with motor and adjusting rod T2-1
2/1.1 Grinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-2
2/1.2 Adjusting rod ..............................................................T2-3
2/1.3 Bean hopper with integrated lid on top. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-3
2/2 Manual insert T2-5
2/2.1 Manual insert for ground coffee and cleaning tablets .............................T2-5
2/3 Boiler water system T2-6
2/3.1 Water tank with lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-7
2/3.1.1 Water tank level sensor T2-8
2/3.2 Water tank inlet assembly ...................................................T2-9
2/3.3 Flow meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-9
2/3.4 Oscillation pump ..........................................................T2-10
2/3.5 Hot water boiler system ....................................................T2-11
2/3.5.1 Hot water boiler and temperature sensor T2-12
2/3.5.2 Thermostat T2-14
2/3.5.3 Hot water boiler safety valve T2-14
2/3.5.4 Water supply assembly and valves T2-16
2/3.5.4.1 Operation of the brewing valve and release valve T2-18
2/3.5.4.2 Valve T2-18
2/3.6 Steam boiler system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-19
2/3.6.1 Steam boiler with temperature sensor and electrode (level sensor) T2-20
2/3.6.1.1 Level sensor T2-21
2/3.6.1.2 Inlet pipe T2-22
2/3.6.2 Thermostat T2-22
2/3.6.3 Steam boiler safety valve T2-23
2/3.6.4 Cappuccino valve (steam boiler) T2-24
2/3.6.5 Steam Jet valve T2-24
2/3.7 Flow Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-26
2/3.7.1 Components and parts T2-26
2/4 Brew system and grounds container T2-27
2/4.1 Brewing unit lid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-28
2/4.2 Brewer with drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-28
2/4.2.1 Outlet piston (top piston with brewing sieve) T2-32
2/4.2.2 Friction piston T2-32
2/4.2.3 Lower piston T2-32
2/4.3 Brewing water connection, coffee spout connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-33
2/4.4 Reed switch ..............................................................T2-33
2/4.5 Brewing unit motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-33
2/4.5.1 Pinion T2-34
2/4.6 Grounds container .........................................................T2-34
2/5 Dispensing devices T2-36
2/5.1 All-in-One spout ..........................................................T2-36
2/5.1.1 Coffee dispensing T2-37
2/5.1.2 Automatic milk and milk foam dispensing T2-38
2/5.2 Hot water dispensing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-39
2/5.2.1 Dosing procedure hot water T2-39
2/6 Drip tray and drip tray grid T2-40
2/7 Fan T2-42
2/8 Electrical/electronics T2-43

WMF 800 / 900 / 1000 S / 1000pro S
© WMF 800 / 900 / 1000 S / 1000pro S Edition 07/2014 - KMT
T0-2
2/8.1 Front panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-43
2/8.1.1 Front panel WMF800 / 900 .................................................T2-43
2/8.1.2 Front panel WMF1000S / 1000proS.........................................T2-43
2/8.1.3 Controller T2-44
2/8.1.4 Controller layout T2-44
2/8.1.5 Table T2-45
2/8.2 Power supply .............................................................T2-46
2/8.3 Heater relay ..............................................................T2-47
2/8.4 Illumination WMF1000proS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-47
2/8.5 Cable harnesses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T2-47
Part 3 Cleaning and care
3/1 Machine cleaning using cleaning tablets (with sponge) T3-1
3/2 Warm-up rinse/coffee system rinse T3-1
3/3 Automatic milk system rinse Connect&Clean T3-1
3/4 Manual milk foamer cleaning (milk system) T3-2
3/5 Cleaning the exterior and interior of the coffee machine T3-2
3/6 Cleaning the water tank, grounds container, drip tray, beanhopper T3-2
3/7 Brewing unit cleaning T3-3
3/8 Descaling T3-3
3/9 Scale filter insert T3-4
3/10 Cleaning intervals overview T3-4
Part 4 Software
4/1 Service program training documentation 5
Part 5 Service
5/1 Start-up T5-1
5/1.1 General Information for Customer Start-up .....................................T5-1
5/1.2 Information for Checking in aService Center ....................................T5-1
5/1.3 Selection of Customer-Specific Settings ........................................T5-1
5/2 Service and maintenance T5-2
5/2.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T5-2
5/2.2 Safety checks during maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T5-2
5/2.3 Customer Check-up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T5-3
5/2.3.1 General Information T5-3
5/2.3.2 Care kit for customer check-up (33.2907.4000 and 33.2907.4100) T5-3
5/2.3.3 Customer Check-up Procedure T5-4
5/2.4 Service Maintenance of Coffee Machine ........................................T5-6
5/2.4.1 General Information T5-6
5/2.4.2 Service Maintenance (reference for maintenance) T5-8
5/2.4.3 Service Maintenance Procedure T5-9
Part 6 Troubleshooting
6/1 User messages on the display T6-1
6/1.1 Operation messages. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T6-1
6/1.2 Cleaning and descaling messages..............................................T6-1
6/1.3 Maintenance and care messages ..............................................T6-2
6/2 Error messages and events T6-2
6/2.1 Error messages on the display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T6-2
6/2.2 Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T6-4

Technical information/basics
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT T1-1
Notes for using the manual
Other applicable documents to supplement the manual
• SparepartslistsforWMF800(includesWMF900withthenameE15-titan)
andWMF1000Sand1000proSPipingschematics(03.0400.0021for
WMF800/900and03.0510.0002forWMF1000S/1000proS)
• Serviceprogramtrainingdocumentation
• UsermanualsWMF900andWMF1000S/1000proS
Update of the manual and associated documents
Themanualandtheassociateddocumentsareupdatedregularly,andareavailablefor
downloadatanytimefromwww.servicecenter.wmf.de.
Youwillbeinformedofanyupdatesviaemail,soyoucankeepyourrecordsupto
date.
Hazard notices
Training Manual Signs and Symbols
Caution.
Hazards to the
coffeemachine.
Caution.
Risk to the user.
Caution.
Hot liquid.
Caution.
Hot surface.
Caution.
Hot steam.
Caution.
Bruising or crushing
hazard.
Tip
Instructions Cross reference
Caution.
Thehazardwarningslistedheremustbefamiliarandmustbefollowedbefore
opening,repairing,ormaintainingthecoffeemachine.
Shock hazard – live parts
Thecoffeemachineisnotfullydisconnectedfromthemainsifonlyswitchedoff!
Priortoanyassociatedwork,beshuretodisconnectpowercord.
Caution.
Linevoltageispresentatthemainscableconnection,theCPUboard,thepower
supply,theheaterrelays,theboilersattheheaterconnections,andtheKlixon
thermaloverloads,andtheircorrespondingconnectinglines.

General information
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
T1-2
Depressurize hot water boiler/steam boiler
Caution.
Hotwaterboilerandsteamboilerandvalvesareunderpressureandtemperature!
Releasepressurebeforecarryingoutmaintenanceorrepairworkandallowtocool
off!
Burn hazard
Caution.
Anypartsthatcomeintocontactwithmediapresentaburnhazard.
Scald hazard
Caution.
hereisariskofscaldingatspoutsandatdisconnectedorfaultyconnectionsdueto
egressofmedium!
Handling of cleaning and descaling agents
Caution.
Healthhazardthroughcontactandswallowing.
Pleasefamiliarizeyourselfwiththesafetydatasheets.
Bruising or crushing hazard
Caution.Bruisingorcrushinghazardexistsonthefollowingmovingparts:
• Brewingunit
• Grinder
• Groundscontainer
• Watertank
• Driptray
• All-in-Onespout

Technical information/basics
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT T1-3
Part 1 Technical information
1/1 Technical information WMF800 / 900
WMF800 WMF900
Brewing process Coffeespecialtieswithandwithoutmilk.
Pot function Usethepotfunctiontodispenseseveralcups
ofcafécrèmeatonce.
Daily/hourly performance** Maximum35cupscoffeespecialtieswithandwithoutmilkand/ormilkfoamdispensingper
day.
4-5litershotwatertotalamountperhour.
Average daily use 7cups
Nominal power rating * 1.7-2.3kW
Energy saving mode
(Consumption at operating
temperature, without water
dispensing)
FourEco-Modescanbeselected:
Ecomode1w51W
Eco-Mode2w42W(savingsof18%)
Eco-Mode3w39W(savingsof24%)
Eco-Mode4w22W(savingsof57%)
Zero Energy function Programmableswitch-onandswitch-offtimesforindividuallyadaptablepowerneeds;no
powerisconsumedwhenswitchedoff.
Mains power connection * 1/N/PE~50/60Hz;220-240V;fusedwithamaximumof16A.
Mains voltage tolerance range 230V++6%-10%;mainsvoltageinterruption<50msnointerruptionoffunction
Ambient temperature +5°Ctomax.+35°C(emptythewaterlineincaseoffrost)
Maximum humidity 80%relativehumiditywithoutcondensation,nowaterspray,
Donotuseunitoutdoors.
Accessories Multitool,cleaningbrush,cleaningtablets,milknozzle,1.7mm(transparent),WMFGasket
grease(5g),milksystemcleaner,ltercartridgewithadapter.
Degree of protection IPX0
Protection class ProtectionclassI
Water tank capacity 2.2litres
Drip tray capacity about1.0liters
Steam jet cup warmer Atthetouchofabutton,hotsteamslowly
owsintothecupfrombelow.
Coffee bean hopper 250g(0.75liters)
Continuous sound pressure level <70dB
External dimensions W/H/D 305mm/400mm/443mm
Weight empty approx.15kg
On-site power connection* 3x1.5²/viaisolatedgroundoutlet
On-site fuses atleast10A
Others Coffeemachinewithdrycoffeegroundsejectionintotheintegratedgroundscontainer
Procedure Driptraywithoutdrainage.
Installation clearances Foroperating,service,andsafetyreasons,themachineshouldbeinstalledwithaclearanceof
notlessthan50mmatthebackandsidesfromthebuildingornon-WMFcomponents.Aclear
heightof1100mmfromthetopofthesupportingsurfaceshouldbeensured.Recommended
heightoftheworkingsurfaceisaminimumof700mmandmaximumof900mmfromoor
level.Aminimumof320mmshouldbeplannedforremovethebrewer.
Built-in electrical connection Thepowercordmustnotcomeintocontactwithhotsurfaces.
Noadditionaluserisallowedtobeconnectedtothepowerconnection.
Water supply and drainage Ineachcase,WMF-specicconnectionconditionsshouldbeobservedforwaterandPower
supply.Fordrinkingwaterwithacarbonatehardnessabove5°dH(carbonhardness),
aWMFscaleltershouldbeinstalled.

General information
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
T1-4
1/2 Technical information WMF1000S / 1000proS
WMF1000S WMF1000proS
Brewing process Coffeespecialtieswithandwithoutmilk.
Pot function Usethepotfunctiontodispenseseveralcupsofcafécrèmeatonce.
Daily/hourly performance** Maximum50cupscoffeespecialtieswithandwithoutmilkand/ormilkfoamdispensingper
day.4-5litershotwatertotalamountperhour.
Average daily use 10cups
Nominal power rating * 1.7-2.3kW
Energy saving mode
(Consumption at operating
temperature, without water
dispensing)
FourEco-Modescanbeselected:
Ecomode1w47W
Eco-Mode2w42W(savingsof11%)
Eco-Mode3w39W(savingsof17%)
Eco-Mode4w22W(savingsof53%)
Zero Energy function Programmableswitch-onandswitch-offtimesforindividuallyadaptablepowerneeds;no
powerisconsumedwhenswitchedoff.
Mains power connection * 1/N/PE~50/60Hz;240V;fusedwithamaximumof16A.
Mains voltage tolerance range 230V+6%-10%;mainsvoltageinterruption<50msnointerruptionoffunction.
Ambient temperature +5°Ctomax.+35°C(emptythewaterlineincaseoffrost)
Maximum humidity 80%relativehumiditywithoutcondensation,nowaterspray,donotuseunitoutdoors.
Accessories Multitool,smallcleaningbrushes,cleaningtablets,gasketgrease(5g)
Transparentmilknozzleforunrefrigerated
milk,steamnozzle(sparepart),airintakepipe
withcap(sparepart)
Milklance,cleaningbrushforthemilklance
Degree of protection IPX0
Protection class ProtectionclassI
Water tank capacity 2.8litres
Drip tray capacity about1.0liters
Steam jet cup warmer Atthetouchofabutton,hotsteamslowlyowsintothecupfrombelow.
Coffee bean hopper 280g(withoptionalcontainerexpansion600g)
Continuous sound pressure level <70dB
External dimensions W/H/D 380mm/407mm(withoptionalcontainerexpansion459mm)/449mm
Weight empty approx.19kg
On-site power connection* 3x1.5²/viaisolatedgroundoutlet
On-site fuses atleast10A
Others Coffeemachinewithdrycoffeegroundsejectionintotheintegratedgroundscontainer
Procedure Driptraywithoutdrainage.
Installation clearances Foroperating,service,andsafetyreasons,themachineshouldbeinstalledwithaclearanceof
notlessthan50mmatthebackandsidesfromthebuildingornon-WMFcomponents.Aclear
heightof1,100mmfromthetopofthesupportingsurfaceshouldbeensured.Theheightof
theinstallationsurfaceabovetheoorisatleast850mm.Atleast320mmclearancemust
beprovidedabovethemachineinordertoremovethebrewingunitformaintenanceand
cleaning.
Built-in electrical connection Thepowercordmustnotcomeintocontactwithhotsurfaces.
Noadditionaluserisallowedtobeconnectedtothepowerconnection.
Water supply and drainage Ineachcase,WMF-specicconnectionconditionsshouldbeobservedforwaterandPower
supply.Fordrinkingwaterwithacarbonatehardnessabove5°dH(carbonhardness),
aWMFscaleltershouldbeinstalled.
*Thelocalpowersupplymustbeconstructedaccordingtoapplicablenationalregulations(e.g.VDE0100forGermany).Toimprove
safety,thecoffeemachineshouldbettedwithanFI30mAearthleakagecurrentcircuitbreakercomplyingwithDINVDE0664.
IfthemainsconnectionleadforthiscoffeemachineisdamagedthenitmustbereplacedusinganoriginalWMFsparepart.No
additionaluserisallowedtobeconnectedtothepowerconnection.
**Thegivendaily/hourlyperformanceisaSTANDARDVALUE,which,amongotherthings,isdependentuponthefollowingfactors:
groundcoffeequantity,typeofcoffee,grindingdegree,brewwateramount,waterhardnessandgeneraloperatingstatusofthe
coffeemachine(e.g.scaling,connectionconditions,electricalpower,drinkingwater,drainage,wear,etc.).

Technical information/basics
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT T1-5
Model label WMF800:
Model label WMF900:
Model label WMF1000S / 1000proS:
permissible
max.pressure 1.6MPa(16bar)
Type VAR Mod. Serial-No. Prod.Date
permissible
max.pressure 1.6MPa(16bar)
permissible
max.pressure 1.6MPa(16bar)
Type VAR Mod. Serial-No. Prod.Date
Type VAR Mod. Serial-No. Prod.Date

General information
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
T1-6
1/3 Views
1/3.1 WMF800 / 900
30
13570 -
(443,4)
53
403
305
283,7

Technical information/basics
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT T1-7
1/3.2 Views WMF1000S / 1000proS

General information
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
T1-8
1/4 Water filter
Theuseofwaterlter100and200isrecommendedforusingwaterwithacarbon
hardnessofmorethan5°dH.
1/4.1 Water filter 100for WMF800 / 900and 1000S / 1000proS
Technicaldataanddimensions:
100
1/4.2 Water filter 200for WMF900 and WMF1000S / 1000proS
Technicaldataanddimensions:
200

Technical information/basics
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT T1-9
1/4.3 Water filter adapter
Ifawaterlterisused,anadaptermustbesetbeforehandinthewatertank.
see User manuals
WMF800 / 900 / 1000S / 1000proS

Grinder
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT T2-1
Part 2 Engineering
2/1 Grinder with motor and adjusting rod
The grinder freshly grinds the coffee
beans with ahorizontal disk grinding
mechanism for each brew. The ground
coffee is transported by the ground
coffee spout to the brewer. The wire
at the end of the ground coffee spout
ensures that the ground coffee falls
into the brewing unit in acontrolled
way. Dispensing is time-controlled.
The grinding degree can be set on the
grinder. The grinder is connected to the
motor with aworm gear.
If the bean hopper is empty, this is
recognised by the current detection,
evaluated by the software and shown
on the display.
If the grinder is blocked or there is
ashort-circuit, this is also recognised by the current detection and shown on the
display. Errors are stored in the error list.
Technical data: grinder
Dispensing Time-controlled: can be set
on the beverage settings
Default value: approx. 1.15g/s
in default setting
Dosing accuracy ± 2 %
Maximum metered
quantities
16g for basic grinder setting
Grinding degree Settings: by the customer
from the outside
See User Manual
Empty message Over the idle current
recognition
As of software version 2.18,
the empty grinder current
can be calibrated individually
using the service program
Technical data: bean hopper
Cup volume approx. 250g Not removable
Technical data: grinder motor
Voltage 24V DC
Idle current acceptable: 1-2A
Blocking current >7A
Operating current
when grinding
5-6A
Service life: grinder
Grinder disks Maximum 90,000grinding operations at 10g/grind
With hard beans, appropriately less
Complete grinder 90,000grindings
Motor 90,000grindings

Engineering
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
T2-2
2/1.1 Grinder
The motor makes contact with the
absorber. It serves to prevent rotation
and for damping out noise.
If the grinder is defective, it must be
completely replaced. The adjustment
rod can be removed beforehand, and
reinstalled on the new grinder.
Spare parts
• Grinder disk set
• Grinder ground coffee spout
• Complete grinder
• Adjustment drive
Setting the grinding degree of the grinder
The upper grinder knife can be adjusted axially with athreaded screw. This has
atake-up part with outer threads for the upper grinder knife. Asetting pin grips the
outside toothed gear, which attaches the multitool and can be set by turning to press
down.
The setting pin is arranged in the bean hopper.
• Turn clockwise: coarser
• Turn counter-clockwise: finder
• Range of settings: 7AM to 5PM
• Grinding opening: 0.084mm to 0.42mm
• Standard setting when delivered: about 11AM
Caution: grinding degree is set only during grinder operation.
Error messages on the display
• Grinder blocked
3
17
23
A
See instructions, error messages, troubleshooting,
part 6.
grinder blocked

Grinder
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT T2-3
2/1.2 Adjusting rod
2/1.3 Bean hopper with integrated lid on top
WMF800 / 900 WMF1000S / 1000proS
15b
Technical data: bean hopper
Fill capacity about 250g; not removable
Technical data: bean hopper
Fill capacity about 280g; not removable
Spare parts
• Bean hopper lid
• Top
Error messages on the display
• Refill beans
See instructions, error messages, troubleshooting
rell beans
conrm beverage

Engineering
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
T2-4
Technician instructions
• If the grinder is faulty, the complete grinder must be replaced
• The idle current recognition must be entered in the service program if the grinder
is replaced
• If the grinder disks must be replaced or the grinder opened, the grinder must be
brought to the base position before putting back into operation.
• If the grinder has been replaced or new grinder disks have been installed, the
counter must be set to zero using the service program.
See Chapter 5/2.5.3
“Carry out Service Maintenance” part 6.

Manual insert and tablet insert
T2-5
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
2/2 Manual insert
The coffee machine has a manual insert for ground coffee and cleaning tablets.
2/2.1 Manual insert for ground coffee and cleaning tablets
The insertion chute is closed with a lid. It is monitored by a switch.
WMF800 / 900 WMF1000S / 1000proS
Spare parts
• Manual insert lid
• Top
The manual insert may only be used for inserting cleaning tablets and ground coffee.
Never allow cleaning powder or coffee beans or water to be placed inside.

Engineering
T2-6 © WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
2/3 Boiler water system
Components:
• Watertank
• Flowmeter
• Oscillationpump
• Hotwaterboiler
• Steamboiler
• Brewingwatervalve
• Hotwaterdispensingvalve
• Safetyvalve
• Cappuccinovalve
• Steamboilerinletvalve
• Releasevalve
• Steamjetvalve(SteamJet)(notforWMF800)
• Airpump(WMF1000proSonly)
16 bar
16 bar
4
3
2
11
1
5
Functional principles of the water system
Freshwaterisfedbytheoscillationpumptothewatertankintothehotwaterboiler.
Therequiredamountisspeciedbytheowmeter.
Theoscillatorpumpproduces,dependinguponow,apressurebetween3and15bar.
Thebrewingwaterisbroughtfromthehotwaterboilerthroughthebrewingvalveto
thebrewingunitforbrewing.Afterthebrewingprocess,pressureinthebrewingunit
isreleasedthroughthereleasevalve.
Allamountsdispensedaremonitoredbytheowmeter.Thebrewwaterwithdrawal,
hotwaterwithdrawalandthesupplyofthethesteamboileraremutuallylocked
out.Whiledispensingabeverage,theotherbeveragebuttonsaredeactivated.The
steamboilerproducesthesteamneededformilkandmilkfoampreparation,andfor
preheatingthecups(SteamJet.)
Steamboiler
Hotwaterboiler
Watertank Oscillationpump
Flowmeter
Steamboiler
inletvalve
Safetyvalve
Steamjetvalve
Cappuccinovalve
Brewingwatervalve
Releasevalve
Safetyvalve
Hot
water
valve
Airpump

Boiler water system
T2-7
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
Beforebeginningworkontheboiler-watersystem,anypressureinthesystemmust
bereleased.
Caution.Burningandscaldinghazard.
Forworkontheheatersorthehotwaterboiler/steamboilerwithitsinletsand
temperaturelimiters,thepowercordmustbepulledoutandthecoffeemachine
powerremoved.
Thefollowingerrormessagesapplyintheentirechapterforallpositionsresultingin
too-lowowduetocontaminationandscaling(calcication)ortoo-lowowtothe
owmeter.
Error messages on the display
Allfaultsassociatedwithlowowarerecognizedbytheowmeter.Theow
malfunctionsarehandledintheirownchapter,astheevaluationiscomplicated.
Error without display message
• Hotwaterissprayingstrongly
• Fluctuatingmeteredquantitiesofhotwater
• Longbrewingtimesforcoffee
• Fluctuatingmeteredquantitiesofcoffee
• Coffeetastesburned
2/3.1 Water tank with lid
WMF800 / 900 WMF1000S / 1000proS
Technical data: water tank
WMF800 / 900 WMF1000S / 1000proS
Watertankvolume 2.2litres 2.8litres
Technical data: microswitch for the water tank lid
12VinputonCPU Switchcontactclosed
Technician instructions
Thelidallowsthewatertanktobelledhigher.
Thecoffeemachinecannotbeoperatedwithoutthelid.
See flow errors chapter 2/3.7
See instructions, error messages, troubleshooting
Part 6

Engineering
T2-8 © WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
Possible faults with error messages on the display
• rellwatertank
• watertankmissing
• Watertanklidopen
Spare parts
• Watertank,completewithlid
• Watertanklid
• Watertanksieve
2/3.1.1 Water tank level sensor
Thesensorworksinacapacitive
mannerandprovidesthesoftware
bothwiththeemptynoticationand
reportingthepresenceofthelled
watertank.
Ifthesensorrecognizesthatthe
amounttobedispensedisgreater
thanthewaterleftinthetankwhen
itregistersempty,dispensingis
immediatelystopped.Ifthesensor
recognizesemptybuttheamount
remainingtobedispensedislessthan
thewaterleftinthetank,dispensing
iscompletedandthentheempty
noticationisgiven.
Technical data: water tank sensor
Watertanksensor Signal:12VNO 12VinputonCPU
Emptythreshold
WMF800/900
75ml Canbechangedwiththeservice
program.
Emptythreshold
WMF1000S/1000proS
80ml Canbechangedwiththeservice
program.
Technician instructions
Thesensorisconnectedtothecontroller.
Thesensorisattachedtothebasepan.
Possible error on the display
• Message“beveragesel.locked-llthewatertank,”cannotbeconrmedalthough
thetankisfull.
beverage sel. locked
water tank missing
beverage sel. locked
lid is open
beverage sel. locked
ll the water tank
See instructions, error messages, troubleshooting
Part 6
See flow errors chapter 2/3.7
beverage sel. locked
ll the water tank
See instructions, error messages, troubleshooting
Part 6
See flow errors chapter 2/3.7

Boiler water system
T2-9
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
2/3.2 Water tank inlet assembly
Thewaterisfedviathewatertank
couplingundernopressureand
bywayoftheowmetertothe
oscillationpump.Aninlinelter
isinstalledbetweenthewater
tankcouplingandtheowmeter
forcoffeemachinesuptoserial
number9115.Thisshouldprevent
contaminationcloggingtheow
metercover.Thehosefromthe
owmetertothepumpislong
enoughtopreventoscillations
fromcausingerroneousmeasure-
mentsintheowmeter.
*Startingwithserialnumber9116,atankvalvettingwithascreeninsertisinstalled.
2/3.3 Flow meter
WMF800 / 900 WMF1000S / 1000proS
DFM
Theowmeterisattachedbelowonthebasepan.Itmeasurestheamountofwater
forcoffee.Thismeasurementcontrolsthemeteredquantity,orindirectly,theheating
ofthehotwaterboiler.
Technical data: flow meter
Ratedvoltage 5V
ccm/digit about1ccm/1digit
Nozzlejet 1.2mm
Pressurerange maximum1bar
Service life: water tank inlet assembly
O-ringsupplyunion 1year,maximum10,000brewingcycles
Flowmeterandhoses 6years,maximum90,000brewing
cycles
Error without display message
• Flowmeterdoesnotturn
• Flowmeternotproperlyconnected
• Hosekinkedbeforeorafterowmeter
• Flowmetercoverclogged
See flow errors chapter 2/3.7
See instructions, error messages, troubleshooting
Part 6