Hi Kelly, lets see if I can help
If the machine is showing 'tip over' it is more than likely the 2 sensors at the rear steering king pins. They are a simple micro switch activated by a pin. Look at the rear steering knuckles, there is a plate with a grease fitting and a harness. Could be that someone thought this was used to grease the upper knuckle. Pull the plate off and clean the grease that is sticking the pin to the switch and reassemble. DO NOT leave that pin out! It is a vital part of the anti-tip system, and a small machine like that WILL tip-over on uneven ground! Slow your operators down if the alert comes up when travelling. That is telling you that the rear tires are lifting.
The other problem I have seen, the harness running to the attachment plug at the forks. Seen more than a few wire breaks at the plug.
Merlo's are over built when it comes to safety, and that's a good thing. But sometimes it's frustrating.
Hope this helps