Drive - HAKO Scrubmaster B 120 R Service Booklet

9.

Drive

The drive control features its own diagnostics and a self-test.
Therefore, the function of the drive control is locked when turning on the
machine if the drive potentiometer is in neutral or is not recognised as being in
neutral.
The same behaviour applies after the seat contact switch has opened and is
closed again.
The drive potentiometer must also be in neutral when closing the seat contact
switch; or to be more precise: it must be recognised as being in neutral by the
drive control.
If the drive control does not recognise that the drive potentiometer is in neutral,
it shows flashing signals (LED) at the drive control. These messages are
transferred to the machine control unit via CAN bus and evaluated by the
machine control unit.
Sheet 69