Deactivating The Level Measurement; Safety And Fault Messages - Graf oneAdvanced Operation Manual

9.1.5

Deactivating the level measurement

To deactivate the level measurement and again run the cycles dependent on time, proceed as
described under "Step 2: Set control unit parameters" in Subsection 9.1.4, and set the water
level b to 0 cm. The set recirculation can remain at 120 seconds.
9.1.6

Safety and fault messages

If the sensor measures a value below 40 cm, the following message appears on the display:
"Fault: Min. level". If this happens, the plant reverts to the normal time-controlled mode. This is
either triggered by too low a water level (≤ 40 cm) in the measuring chamber or a leak in the
pressure or measurement line. In this event, we recommend contacting your maintenance com-
pany.
If the sensor measures a value greater than "Warning overflow", this message appears on the
display. If this happens, the plant reverts to the normal time-controlled mode. The cause is either
too high a wastewater supply or a clogged clear water lifter. In this event, we recommend con-
tacting the maintenance company.
9. Additional controller functions
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