Fault Possible cause Action
The pump symbol rotates
without the pump actually
running.
The connection to the pump
has been interrupted.
Make sure that the cable
connection to the pump is
intact.
The pump has seized up. Make sure that the pump is
running.
There is no voltage at the
pump output.
Contact the manufacturer.
The temperature display
fluctuates strongly at short
intervals.
The sensor lines have been
installed close to 230 V lines.
Install the sensor lines at the
greatest possible distance from
the 230 V lines.
Make sure that the sensor lines
are shielded.
The extensions of the sensor
lines have not been shielded.
Make sure that the sensor lines
are shielded.
The controller is faulty. Contact the manufacturer.
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