WMF 800 - Flow Errors; 2;3.7.1 Components and Parts T2-26

Engin eering
T2-26
© WMF800 / 900 / 1000S / 1000proS Edition 07/2014 - KMT
2/3.7 Flow Errors
Theowmeteristhesensorthatrecognizesthecauseoffaultsiftheowistooslow
foranybrewingoperation,beveragemeteringandforsteamboilerinow.Pressure
thatistoohighinthebrewingsystemcanbedetectedindirectlybymonitoringow.
Thelesswaterpumpedbytheoscillatingpumpwithlowow,thegreaterthepressure.
Thiscan,forexample,becausedbyacloggedbrewingsieve,whichallowsthepressure
toincreasesomuchinthebrewingunitthattheburstingpressurecouldbereached.
Thisispreventedbysoftware.
2/3.7.1 Components and parts
Themostfrequenterrorswhichthecustomercanxareshownhere:
• “Rellwatertank”
• “Grindingtoone?”
• “Machinecleaning”
Components which can cause flow errors:
flow meter
• Hosebeforeandaftertheowmeter(kinkedorcrimped)
• Pump
• Filterold/usedup
• Watertanknesieveclogged
• Brewingunit(inlet,hosetothebrewingunit,lowerpistonorupperpiston)
• CoffeespoutY-piece
• Flowmetercontaminated
For all error messages, check the flow errors:
• isthereairinthesystem(bleedcoffeemachineviahotwaterdispensing)
In the case of clogging on or after:
• Hotwatervalve
• Steamboilerinletvalve
Duetothestoppage,thebrewingvalveisforcedopenbythehighpressure,andwater
runsintothebrewingchamber.
beverage sel. locked
ll the water tank
grinding too ne?
clean machine
See instructions, error messages, troubleshooting
Part 6