Graf ONE2CLEAN Manual page 14

OPERATION OF THE CONTROL SYSTEM
4
4.2.5 Old Faults
The controll system stores all past fault messages and the operation of the control system via the "manual mode"
function. Past fault messages with date and time can be read under the menu item "Old faults". The individual messages
can be accessed using the arrow keys. You can exit the menu item by pressing
Faults are indicated as encoding, in order of their appearance, starting with number 0 (latest signal).
Coding
1
2
3
4
5
ystem
The faults number 2 (net is back) and number 5 (manual operation) are no faults. They will be registered for a better
temporal localization of possibly occurring faults or rather monitoring of manual activities on the control system.
the control unit. The microprocessor
4.2.6 Display Settings
ng conditions and the query of system
This menu item allows the current control system settings to be seen. It is not possible to change these settings. This
pecialist company.
menu item is used to analyse the settings without making changes. The individual settings can be called up using the
arrow keys
he two arrow keys
4.2.7 Service Menu
ng or will be terminated automati-
Operating parameters can be changed in the service menu. Access is protected with a code. This second
maintenance level is reserved exclusively for qualified specialist personnel only!
Any access to the control system settings by unauthorised persons will cause the warranty to expire!
aining time, as well as the display of
essing the button and enter oper-
ssed from the operator level using an
Here adjustments or changes can be
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Graf UK Ltd
Meaning
Power failure (system is currentless)
Net is back (system regains power)
Compressor has over-current
Compressor current supply too low
Manual operation
. You can exit the menu item by pressing
. The set-
Display
Denitrification
Ventilation
Sedimentation phase
Activity phase
Cycle pause/
holiday mode
Rest: XXX:XXmin
4. Operation of the Control System
Symbol
4.1.1 Display of Operating Status
The operating status is indicated by the LEDs
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 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/ Y3 valve (plug X1.1) is actuated; the system is aerated in intervals (considerably
holiday mode less than in the aeration phase).
Rest: XXX:XXmin Display of remaining time.
Symbol Key assignment
Enter key
Scroll
Acknowledgement
.
Process performed
Y3 valve (plug X1.1) is actuated intermittently; the activated slu
mixed with the wastewater. This is followed by long pauses (respon
Y3 valve (plug X1.1) is actuated; the system is aerated in interva
period of time.
No valves are actuated, the activated sludge settles in the system.
Y4 valve (plug X1.2) is actuated; the clear water is pumped into the
Y3 valve (plug X1.1) is actuated; the system is aerated in intervals
less than in the aeration phase).
Display of remaining time.
Key assignment Function
Enter key Selection of operating mode, confirmation o
Scroll Display of operating modes and queries Pro
(green = operational / red = fault) and as text on the screen.
the system by entering figures
Acknowledgement Acknowledgement of entries without saving
Acknowledgement of fault messages
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Function
Selection of operating mode, confirmation of entries
Display of operating modes and queries Programming of
the system by entering figures
Acknowledgement of entries without saving
Acknowledgement of fault messages
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