33
19. Water sensor fault:
– ClO
2
production proceeds.
– Combined and setpoint controller
stop and start running after fault
elimination.
Stop the controller.
a) Measuring cell float body above the water
sensor – flow too high.
Reduce the flow with the measuring cell
adjustment spindle.
b) Measuring cell float body below the water
sensor – flow too low.
Increase the flow with the measuring cell
adjustment spindle.
c) Sample-water bleeding point or hose to the
measuring cell clogged or leaking.
Check the sample-water bleeding point and
the hose to the measuring cell.
d) No sample-water flow in the measuring
cell. Filter clogged.
Call Service. Clean the measuring cell filter.
e) Insufficient water at the sample-water
bleeding point.
Check the flow in the main line at the sample-
water bleeding point.
f)
Water sensor.
Call Service to replace the water sensor.
g) One of the cables from the measuring cell
to the control system.
Call Service to replace the cable.
h) Control system.
Call Service.
i)
Setting in the MAINTENANCE > WATER
SENSOR > NC CONTACT/NO CONTACT
menu
does not correspond with terminal
connections.
Setting can only be corrected using super-
user-code!
20. Cleaning motor fault:
– ClO
2
production proceeds.
– Alarm relay activated.
– Combined and setpoint controller
stop and start running after fault
elimination.
Cleaning motor monitoring in the measuring
cell indicates a fault.
Stop the system.
a) Faulty cleaning motor.
Check the power supply to the cleaning
motor. Call Service to replace the cleaning
motor.
b) No power supply to the cleaning motor.
Cable breakage.
Check the cable. Call Service to replace.
c) Gas bubbles in the measuring cell.
Vent the measuring cell.
21. Dosing time ClO
2
exceeded:
– ClO
2
production proceeds.
– Alarm relay activated.
– Controller stops ClO
2
dosing
pump until fault is eliminated.
Controller attempts to operate at maximum
dosing flow for a period longer than the set
time.
a) Solution in the reservoir tank has been
diluted too much after flushing (after a
power supply
failure)
(for setpoint and combined controllers
only).
Continue operation after flushing.
b) Poor water quality
(for setpoint and combined controllers
only).
Measure the water quality and the ClO
2
concentration in the main line.
c) Water flow meter defective or wrong
setting of water flow meter
(proportional and combined controllers
only).
Check the water flow meter and replace, if
necessary.
d) Measuring cell cable
or measuring cell.
Check the measuring cell
cable.
Call Service to replace.
e) Chemical container contains only water.
Replace the chemical container.
f)
Controller set incorrectly.
Call Service to check the controller settings.
22. Wire breakage current output 2:
– ClO
2
production proceeds.
– Alarm relay activated.
– Combined and setpoint controller
stop and start running after fault
elimination.
Chlorine dioxide measured value can no
longer be transmitted.
a) Cable breakage at current output.
Service: Check current output measurement
with TEST CURRENT menu.
Replace the cable, if necessary.
b) Control system.
Service: Replace the control system, if
necessary.
23. Wire breakage current output 1:
– ClO
2
production proceeds.
– Alarm relay activated.
Cable breakage at controller output used to
control the external dosing pump.
a) Cable breakage.
Service: Check current output control with
TEST CURRENT menu. Check the cable and
replace, if necessary.
b) Control system.
Service: Replace the control system, if
necessary.
Error message if applicable
system reaction
Cause
Remedy
