Kärcher SB MU 908 Originalbetriebsanleitung Seite 71

Fault Possible cause
Permeate output is Water inlet temperature is too low
too low; buffer tank
of permeate is often
Operating pressure is too low
empty
There are calcium or mineral deposits on the fil-
ter surface of the RO membrane.
Level switch Buffer tank is "full" is defective
There are bacteria or algae deposits on the filter
surface of the RO membrane.
There are stains on The mineral content of the softened water is too
the car paint during high
Top Care (perme-
RO membrane has ruptured; defective sealing Replace washer or membrane. Check conductivity Customer Ser-
ate has not been
adequately demin-
Mixing of permeate and softened water
eralised)
Fault Possible cause
Frost protection is Power supply has been interrupted
not working
Exterior temperature sensor installed incorrect-
ly.
Spray pipe, hand- Sieve with throttle plugged (marked red)
spray gun and high-
pressure hose are
Filter of the anti frost pump plugged
frozen
Remedy
Measure the temperature of the softened water and
compare it with the technical data.
Reset the operating pressure.
Decalcify the membrane; replace it, if necessary
Check level switch.
Rinse the membrane thoroughly for a long time; re-
place it if necessary. In future remember: Water is of
potable quality; avoid long idling periods.
Check conductivity of softened water.
Comparison of conductivity of the permeate from
the spray pipe and water from the buffer tank of per-
meate.
Faults on the frost protection units)
Remedy
Check power supply and ensure proper supply.
See section "Installing system".
Open the screw connection. Clean sieve. Check to
see whether the throttle boring moves freely.
Clean the filter and replace
34
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EN
By whom
Operator
Customer Ser-
vice
Customer Ser-
vice
Customer Ser-
vice
Customer Ser-
vice
Customer Ser-
vice
vice
Customer Ser-
vice
By whom
Operator
Customer Ser-
vice
Operator
Operator
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