English (GB)
49
"fault of electrode/buffer"
Fault during pH calibration. Two buffers with a pH
difference of less than 1 pH were selected.
Check the buffer solutions. Repeat the
calibration, and replace the electrode.
"calibration time exceeded"
Fault during ClO
2
, pH and ORP calibration. This
alarm is activated, if the calibration process does
not have a stable measured value within a certain
period.
Check the pH electrode and replace, if
necessary.
"offset"
Fault during ORP calibration. Invalid calibration
result detected by plausibility check.
Repeat the ORP calibration, or replace the
electrode.
"calibrate ClO2 sensor"
"calibrate pH sensor"
"calibrate ORP sensor"
The set monitoring time is reached for the next
calibration interval.
Calibrate or replace the electrode or the
sensor.
"water sensor fault"
The floater of the measuring cell is above the water
sensor. The flow is too big.
Reduce the flow with the adjustment spindle
of the measuring cell.
The floater of the measuring cell is below the water
sensor. The flow is too small.
Increase the flow with the adjustment
spindle of the measuring cell.
The sample-water extraction device or the hose to
the measuring cell is clogged or leaking.
Check the sample-water extraction device
and the hose to the measuring cell.
No sample-water flow in the measuring cell. Filter is
clogged.
Clean the filter of the measuring cell.
Lack of water at the sample-water extraction device.
Check the flow in the main line at the
sample-water extraction device.
Faulty water sensor. Replace the water sensor.
Faulty cable between the measuring cell and the
control unit.
Replace the cable.
Faulty control unit.
Check the control unit. Replace the control
unit, if necessary.
"fault of cleaning motor"
Cleaning motor monitoring in the measuring cell
indicates a fault.
Stop the system.
• Faulty cleaning motor. Check the power supply of the cleaning
motor. Replace the cleaning motor.
• No power supply to the cleaning motor. Cable
breakage.
Check the cable. Replace the cable.
• Gas bubbles in the measuring cell. Vent the measuring cell.
"ClO2 dosing time exceeded"
The dosing control predefines the maximum
capacity for a longer period than the set time.
• After a power supply failure, the solution in the
internal batch tank has been diluted too much
after flushing (setpoint control and combined
control).
Continue ClO
2
production and dosing after
flushing.
• Poor water quality (setpoint control and
combined control).
Measure the water quality and the ClO
2
concentration in the main line.
• Faulty water meter, or wrong setting of water
meter (proportional control and combined
control).
Check the water meter. Replace water
meter, if necessary.
• Faulty measuring cell cable or measuring cell. Check the cable of the measuring cell.
Replace, if necessary.
• HCl or NaClO
2
container contains only water. Replace the HCl or NaClO
2
container.
• Dosing control is set incorrectly. Check the dosing control settings.
"wire breakage current output 2"
Cable breakage between the control unit and an
external recording device.
Check the current output measurement with
the "function tests" menu, see section
9.4.2 Current outputs. Replace the cable, if
necessary.
Faulty control unit. Replace the control unit, if necessary.
"wire breakage current output 1"
Cable breakage between the control unit and the
digital dosing pump.
Check the current output control with the
"current output" menu, see section
9.4.2 Current outputs. Replace the cable, if
necessary.
Faulty control unit.
Check the control unit. Replace the control
unit, if necessary.
"external failure"
An external device, which is connected to the failure
input (terminal 51/52), indicates a fault.
• Faulty external device. Check the external device.
• Cable breakage between the control unit and the
external device.
Replace the cable.
• Faulty control unit. Replace the control unit, if necessary.
Error message Cause Remedy
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