HAKO Scrubmaster B 115 R, Сервисная книжка

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Foil 20
To reactivate the machine functions after the
“seat contact switch manipulation” was
triggered, the control system needs to recognize a change in switch position
(ON-OFF-ON or OFF-ON-OFF).
Sear contact closed means, the operator is on the seat;
Seat contact open means, no operator is on the seat.
When the seat contact switch is closed, the hour meter in the display is constant on,
while it is blinking, when the switch is open.
The drive control is provided with its own diagnosis and self-test.
Therefore, the function of the drive control is inhibited when the machine is switched
on if the drive potentiometer is not in its neutral position or is not detected as being in
neutral.
The same occurs after the seat contact switch has been opened and is closed again.
Even when the seat contact switch is closed, the drive potentiometer must be in
neutral, or rather: detected as being in neutral by the drive control.
If the drive control detects the drive potentiometer as not being in neutral, it initiates
flashing signals (LED) on the drive control.
2.2.3 Seat Contact Switch (3.6.6.4.)