Kärcher SB MB, Manual, Page: 44 / 54

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42
Interruptions in water preparation
Fault Possible cause Remedy By whom
Base exchanger is
not regenerating No power supply Check power supply (fuse, plug, switch). Operator/Cus-
tomer Service
Hardness sensor defective Check hardness sensor, replace if required Customer Ser-
vice
Water remains
hard after regener-
ation No salt in the salt tank Refill salt, wait for brine formation (approx. 2 hours).
Start new regeneration.
Do not allow the salt level to fall below the water lev-
el. Operator
Injector filter is blocked Clean the filter Customer Ser-
vice
Water flow to the salt tank is inadequate Check the brine filling duration; clean the brine filling
aperture, if required. Customer Ser-
vice
Rising pipe is leaky Check rising pipe, pilot pipe Customer Ser-
vice
too high salt con-
sumption too much water in the water tank see below Customer Ser-
vice
wrong salt quantity setting Check salt consumption and salt settings Customer Ser-
vice
Pressure loss Deposits in water inlet Clean the filter Customer Ser-
vice
Deposits in base exchanger Clean valve and resin board Customer Ser-
vice
Too much water in
the salt tank Rinsing aperture is blocked Clean rinsing aperture Customer Ser-
vice
Injector is blocked Clean injector and filter Customer Ser-
vice
Foreign particles in the solenoid valve Clean the solenoid valve, change the valve seat Customer Ser-
vice
Power failure while filling brine Check power source Customer Ser-
vice
Brine is not getting
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 Ser-
vice
Injector is blocked Clean injector and filter Customer Ser-
vice
Leak inside the valve Replace valve flaps Customer Ser-
vice
There is always wa-
ter in the drainage,
even after regener-
ation Valve does not execute the correct cycles Check timer programme; replace the valve controls,
if required Customer Ser-
vice
Foreign particle in the valve Remove the valve control, take out the foreign parti-
cle, check valve in all the positions Customer Ser-
vice
RO Pump does not
start Buffer tank for permeate is full Wait until the permeate is consumed. Operator
Level sensor "Buffer container full" defective Check level switch. Customer Ser-
vice
Start-up time of the control has not yet been
completed Wait. Operator
The pressure switch for water shortage has
tripped. Fine filter or active carbon filter dirty
Check filter; replace the filter inlay, if required Operator
Pressure switch for water scarcity is defective Check pressure switch; replace it, if required. Customer Ser-
vice
Regeneration of the base exchanger is running Wait for regeneration to end. Operator
No softened water is coming from the base ex-
changer Check the base exchanger. Operator/Cus-
tomer Service
Pump disconnection from mains (optional) not
working Check supply voltage.
Check pump. Customer Ser-
vice
RO pump starts
only after several
rinsing cycles Too low mains water pressure Check mains water supply; open the inlet valve fully,
if required. Operator
Fine filter or active carbon filter dirty Check filter; replace the filter inlay, if required Customer Ser-
vice
44 EN