35
5.12.2 Faults without error message
31. ClO
2
alarm value 1 or 2 exceeded
or not reached:
– ClO
2
production proceeds.
– Alarm relay activated.
Appears when the set upper switching point for
the alarm is exceeded or not reached.
Call Service.
Error message if applicable
system reaction
Cause
Remedy
The dosing pump stops. The DDI pump
display shows the message "ERROR".
The DMI pumps do not display an error
message.
The isolating valve of the dosing line is closed. Open the isolating valve. If the Oxiperm Pro
operates in 60 Hz mode, check if the
multifunction valve is set to 6 bars at the
overflow side. See also the installation and
operating instructions for the multifunction
valve.
Overdosing of chlorine dioxide dilution
due to a "free discharge".
The chlorine-dioxide dosing pump has a "free
discharge" into a container. Even if the pump
stops, the chlorine dioxide solution continues
running into the container due to a siphon
effect. The consequence is overdosing.
The conditions are:
•
injection unit disconnected.
•
dosing pump without multi-function valve.
Connect the multifunction valve at the pump.
This will prevent undesired siphoning, i.e.
uncontrolled flow of the dosing liquid through
the dosing lines.
