10.8.5 Ozone generator pressure
The gas pressure for ozone generation is monitored by the pres‐
sure sensor (6) and displayed on the touch panel. The pressure
relief valve (8) limits the pressure to non-critical values. The actual
gas pressure in the ozone generator depends on the pressure of
the process water at the point of injection, the back pressure of the
pneumatic equipment (5, 43) between the ozone inlet and the point
of injection, and the flow rate of the gas.
10.8.6 "Internal" / "External" operating mode
The abbreviation
‘int’ or ‘ext’ in the field with the setpoint indicates
in which operating mode the unit is currently working:
internal - The ozone quantity can be set in % increments in the
display, as described above.
external - The ozone volume is set using a normal signal interface
connected to the 0-20 mA or 4-20 mA input.
Manual - If the
[Manual] symbol is visible at the top left, the
system is in Manual model (for tests, maintenance).
If the operating mode is changed, the system changes automati‐
cally to
‘STOP’ operating status and must be restarted by the user.
10.8.7 Status / error messages
Messages about the status of the system or error messages
appear at the top in the status bar.
10.8.8
[ALARM] key / Display
The display shows this using its colour:
Tab. 7: ALARM
Colour codes
Meaning
blue
no errors
yellow / blue, flashing
warning
red / blue, flashing
fault
red / yellow, flashing
w fault
You move to the error list if you press on
[ALARM] in the event of
an error.
10.8.9
[START] or [STOP] key
The
[START] or [STOP] key shows this by its colour:
Operation
60