Hi, Tamperprufe.

Thanks for info. I see the floor level is using the magnet switch white colour. Floor Height there is a sensor location at car top and with a long steel bar hoistway mounted inside. (sorry hard to explain that, and no take picture)

Comparing with 3300 and 5400, they both totally not the same system. (Sorry is not 5500, is 5400)
Miconic MX-GC
CO MX 6.1 55504660

(Hi Heisenberg), Yes i'm afraid thats the item faulty. Still investigate it.