Kärcher SB MU, Manual

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33
Interruptions in water preparation
Fault Possible cause Remedy By whom
Base exchanger
is not regenerat-
ing No power supply Check power supply (fuse, plug, switch). Operator/
Customer
Service
Hardness sensor defective Check hardness sensor, replace if required Customer
Service
Water remains
hard after regen-
eration No salt in the salt tank Fill up salt, do not allow the salt level to fall below
the water level. Operator
Injector filter is blocked Clean the filter Customer
Service
Water flow to the salt tank is inadequate Check the brine filling duration; clean the brine fill-
ing aperture, if required. Customer
Service
Rising pipe is leaky Check rising pipe, pilot pipe Customer
Service
too high salt con-
sumption too much water in the water tank see below Customer
Service
wrong salt quantity setting Check salt consumption and salt settings Customer
Service
Pressure loss Deposits in water inlet Clean the filter Customer
Service
Deposits in base exchanger Clean valve and resin board Customer
Service
Too much water
in the salt tank Rinsing aperture is blocked Clean rinsing aperture Customer
Service
Injector is blocked Clean injector and filter Customer
Service
Foreign particles in the solenoid valve Clean the solenoid valve, change the valve seat Customer
Service
Power failure while filling brine Check power source Customer
Service
Brine is not get-
ting sucked in Water inlet pressure is too low Increase water pressure to at least 0.3 MPa (3
bar). Operator
Rinsing aperture is blocked Clean rinsing aperture Customer
Service
Injector is blocked Clean injector and filter Customer
Service
Leak inside the valve Replace valve flaps Customer
Service
There is always
water in the
drainage, even
after regenera-
tion Valve does not execute the correct cycles Check timer programme; replace the valve con-
trols, if required Customer
Service
Foreign particle in the valve Remove the valve control, take out the foreign
particle, check valve in all the positions Customer
Service
71 EN