Miele S 8310 Descriptive Technical Documentation page 25

DTD no. 41-8000
Note
If the nozzle was run over smooth flooring (e.g., parquet or tile) while in the
Automatic setting, the motor will run at its highest speed due to the air coming
in at the sides of the nozzle.
Cause
Pressure sensor on the electronic board is defective.
Remedy
A Pull off the hose between the control panel and the dust compartment lid (040
Fig. 5, Pos. B).
A Switch the motor on in the "Automatic" setting.
A Generate a low-pressure condition at the disconnected end of the hose (e.g.,
quickly suck an object in).
A If the motor speed does not drop, then the pressure sensor is defective.
A Replace the electronic.
07.06.2013, US_am
Descriptive Technical Documentation
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040-7