HAKO Scrubmaster B 120 R, Сервисная книжка

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Sheet 23
The seat contact switch (S05) is connected to the control electronics A1 at
A1:X9.8+18 and A1:X9.3+13.
The control electronics (A1) responds to the relief of the seat with an approx. 2 second
delay. This means: If the contact at A1:X9.8+18 is opened for longer than 2 seconds
during machine operation, the motors stop and the brush head and the squeegee are
raised.
If the switch is closed again within 2 seconds, the machine continues to operate
without any interruptions.
If the seat contact switch is not actuated for > 6 hours while the key switch is switched
on, the machine is locked in all functions (driving and cleaning). The same applies if
both contacts of the seat contact switch have the same switch status for longer than a
few seconds, i.e. both switches are detected as being open or closed by the machine
(seat switch manipulation).
The service code 3.6.6.4. is shown in the operating hours meter. Only driving is now
still possible. If the key switch is switched off and then back on without the seat
contact switch being relieved or actuated again, the driving function is also
deactivated.
2.2.4 Seat contact switch (3.6.6.4.)