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TROUBLESHOOTING
FAULT IDENTIFICATION GUIDE
This guide describes:
A number of symptoms as well as feasible solutions to these. •
Special features regarding some of the symptoms. These notes, e.g. Low inlet water temperature•
1
,
are listed in the “Comments” section following the “Fault identication table”.
Possible error codes on the product’s display. However, depending on what is causing the problem, symptoms can appear •
without error codes.
The following subjects are addressed in the following “Fault identication table”:
Broken diods on the printed circuit board1.
Low water ow2.
The water purier does not stop even if the valve/faucet is closed3.
The water purier does not start/does not start to produce water.4.
Filter I, stop or warning. Low pressure warning. (Possible internal leakage.)5.
Low water quality, warning/stop.6.
Intermittent start and stop.7.
Broken PCB.8.
Delayed start of motor.9.
Non normal sound10.
FAULT IDENTIFICATION TABLE
Symptom
Possible error
codes
Check/Action Remedy
When suspecting an error •
code, perform a diode test
to verify that the code is
correct.
A broken diod can result in an erroneous in-
terpretation of error codes. Replace the printed
circuit board (PCB).
Low inlet water
temperature
1
Membrane may be
clogged
2
<Not displayed>
Measure the inlet water tem-•
perature and then, compare
it with the specication at
15° C.
Has the product been des-•
caled recently or is the inlet
water soft?
Has the product been off-•
line without preservation for
an extended period of time?
Estimate the ow variation due to temperature
variation. If this can explain the low ow,
a descaling may increase the ow rate. If a
service technician is present, proceed with the
system pressure measurement.
If there is reason to believe that the product
has not been descaled - descaling is recom-
mended.
If the product has been off-line without pres-
ervation - proceed with a disinfection. Then,
if a service technician is present, proceed with
system pressure measurements.
a)
b)
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