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Troubleshooting
18
Troubleshooting
Fault
No or insufficient sample water
flow
(Flow meter shows no or too low a
flow)
Defective metering and control
performance
Measuring errors
122
CAUTION!
–
Please also observe the operating instructions
for controllers and fittings and any other units,
such as sensors, sample water pumps ... !
–
Adhere to the material safety data sheets for
the media used in your process!
NOTICE!
–
With terminal boxes: A wiring diagram is
enclosed in the documentation for the
DULCOTROL
Cause
Filter blocked
Sample water pumps not working
or working incorrectly
Blockage of the pipework system
Controller with no or without suffi‐
cient functionality
Defective or incorrectly calibrated
sensors
Power failure, sensors in run in
phase, therefore faulty measure‐
ment
Incorrect composition and/or con‐
centration of the feed chemical
Incorrect allocation of the feed
chemical
Air in the system
Temperature outside of the speci‐
fication
Changed process parameters,
e.g. water quality
Pressure too high
®
measuring/control station.
Remedy
Clean or replace the filter. See
manufacturer's documentation
Check and, as necessary, repair
the electrical power supply. See
wiring diagram.
Mechanical causes: See manufac‐
turer's documentation
Check the pipework system and
clean as necessary
Check and, as necessary, repair
the electrical power supply. See
wiring diagram and controller
operating instructions
Refer to the operating instructions
for the sensor and controller
Check and, as necessary, repair
the electrical power supply. See
wiring diagram
Stop the control and observe the
run in period for the sensors
Adhere to the material safety data
sheets for the media used in your
process! Check the quality and/or
quantity of the feed chemical and
correct as necessary
Check the feed chemical alloca‐
tion and correct as necessary
Bleed the system
Install heat exchanger upstream
of the measuring point
Check the suitability of the sen‐
sors
Fit a pressure reducer
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