English (GB)
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11. Fault finding
See also the manual "Sensors V1" supplied with the sensor.
Fault
Cause
Remedy
1. No water flow
a) The inlet valve is closed.
Open the inlet valve completely.
b) The inlet strainer is blocked
Clean the filter of the inlet strainer.
c) The flow detector or the flow
restrictor is blocked.
Clean the flow detector or the flow restrictor, or replace the
complete component.
2. Water is running out of the
sampling point.
a) The sampling point is not closed
correctly.
Close the outlet fitting of the sampling point.
3. The power supply LED is off.
a) No power supply.
Connect to the power supply.
4. The displayed system time is
not correct or is not updated
every second.
a) The internal clock is not adjusted.
Adjust the clock in the "Setup" menu.
Restart the CU 382 control unit.
5. Error messages or error
symbols are displayed.
a) The sensor communicates an
error.
In the menu "Parameter settings", select "Monitor" and
check the sensor status. See also the manual "Sensors V1"
for status information.
6. Hoses or connections are
leaking.
a) The fittings are not tight.
Tighten the fittings carefully. Do not use force.
7. The flow detector shows no
flow.
a) The inlet valve is closed.
Open the inlet valve.
b) The inlet strainer is blocked.
Clean the inlet strainer.
8. Water is not visible in the
hoses.
a) The inlet valve is closed.
Open the inlet valve.
b) The inlet strainer is blocked.
Clean the inlet strainer.
9. Water is not visible in the
hoses. Air comes out of the
flow restrictor.
a) The pressure on the inlet is too
high.
Reduce the pressure on the inlet.
10. The parameter readings are
fluctuating.
a) The measuring electrode is
contaminated or faulty.
Exchange the electrolyte or the membrane cap. See the
manual "Sensors V1" for more information.
b) The inlet strainer is blocked.
Clean the inlet strainer.
c) Air bubbles are in the flow cell.
Reduce the pressure on the inlet.
11. The parameter readings are
not plausible.
a) The measuring electrode is
contaminated or faulty.
Exchange the electrolyte or the membrane cap. See the
manual "Sensors V1" for more information.
b) The inlet strainer is blocked.
Clean the inlet strainer.
c) Air bubbles are in the flow cell.
Reduce the pressure on the inlet.
12. The readings are not within
the specified and calibrated
measuring range.
a) The sensor or the DID was
powered-on very recently.
It takes up to an hour until a sensor provides correct
values.
b) The concentration of the measured
substance is to high.
Change to a sensor with a wider measurement range.
