4. Control unit
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Instructions for operating the wastewater treatment system 4.5
The system is operated using a microprocessor in the control unit. The microprocessor allows operating
parameters to be set, operating statuses to be displayed, system parameters to be queried and operating
times to be programmed by a specialist.
Settings are entered by scrolling through numerical values using the and arrow keys.
The setting is then confirmed by pressing the key.
The individual dialogues can be closed prematurely by pressing or close automatically after 2
minutes.
The control unit is divided into the following display screens:
1. Basic level: Status of cycle process with remaining time elapsing and fault message display.
2. Operator level: By pressing the key, the operator can enter the operator level and undertake
operator-specific settings.
3. Service level: A password-protected service level is accessed from the operator level via an additional
code. This level is reserved for trained staff. Settings and/or changes can be undertaken here and di-
agnosis data called up.
4.5.1 Control programs
The control unit switches the outputs for air compressors and valves at specific times.
The times are defined by the set sequence tables.
In accordance with the sequence table selected, a complete cleaning cycle is started at each start time.
Setting holiday times at operator level enables all cleaning cycles to be suppressed for the set time peri-
od. Only a holiday cycle with greatly reduced activity occurs during this time. No treated wastewater is
extracted during this time because no water should be fed in.
The current sequence table can be modified by trained staff in the service level. Depending on the size of
the wastewater treatment system, another sequence table can be selected. The current sequence table
and other settings are stored resistant to zero voltage. The current sequence table is only modified or a
new sequence table selected in the cycle pause. This ensures that the current extraction is always under-
taken at the end of a complete cleaning cycle.
If this is not necessary, the user can perform a "Cycle restart" to immediately adopt the modified parame-
ters.
A sequence table consists of:
• table name - comprising max. 16 characters, e.g. one2clean+ 4PE C
• number of start times (cycles) - max. 24
• cycles - with cycle times and the consumers to be switched
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