Graf one2clean - Page 10

. OPERATION OF THE CONTROL SYSTEM
Graf UK Ltd

OPERATION OF THE CONTROL SYSTEM
4
4. Operation of the Control System
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4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display
Process performed
Denitrification Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
Aeration
Rest: 120:10min
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the liquid crystal
display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display Process performed
Denitrification Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is brieflymixed
with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/holiday mode Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement Acknowledgement of entries without saving
Acknowledgement of fault messages
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display
Process performed
Denitrification Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min
4. Operation of the Control System
25 / 57
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs (green = operational / red = fault) and as text on the screen.
In normal operating mode (aeration mode), the display appears as follows:
In automatic mode, the liquid crystal display shows the current work phase and the remaining time left in
this phase.
If a fault occurs, the red LED is turned on. A message indicating which component is faulty appears in the
liquid crystal display (e.g. Fault Compressor 0.0A).
4.1.2 The following work phases are displayed
Display
Process performed
Denitrification Y3 valve (plug X1.1) is actuated intermittently; the activated sludge is briefly
mixed with the wastewater. This is followed by long pauses (response times).
Ventilation Y3 valve (plug X1.1) is actuated; the system is aerated in intervals over a long
period of time.
Sedimentation phase No valves are actuated, the activated sludge settles in the system.
Activity phase Y4 valve (plug X1.2) is actuated; the clear water is pumped into the drain.
Cycle pause/
holiday mode
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment Function
Enter key Selection of operating mode, confirmation of entries
Scroll Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement Acknowledgement of entries without saving
Acknowledgement of fault messages
Aeration
Rest: 120:10min