Stulz UltraWater 400 basic - Page 42

Troubleshooting STULZ UltraWater 3-stage reverse osmosis system SUW
© STULZ GmbH, Hamburg
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42
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Quality of pure water is too poor Water quality monitoring system
is faulty
Check or replace water quality
monitoring system.
Prelter extremely contaminated Replace prelter insert.
Pure water quality of untreated
water is too poor
Install a deionizer behind the mem-
brane, or choose a system model
with a higher retention rate.
Blocked membrane Replace membrane. If the mem-
brane quality has declined dra-
matically over a short time (approx.
6 months), the system should be
supplied with softened water, or
equipped with an upstream hard-
ness stabilization lter.
No waste water ows during
operation
Waste water hose (red) kinked Get rid of the kink.
Faulty ow restrictor Replace ow restrictor.