Unfortunately we have found a problem with our products that use the mps controller board. Products that have been dispatched after April 17th 2014 (our warehouse) maybe have a reversed port for the alarm (tacho) and aquabus. We ask all customers that have purchased a product lately to check the orientation of the ports:



As described in the picture: do not use the tacho and aquabus port if you own an affected board. Please contact our support and ask for an adapter cable or to get further assistance.