Heatpump singular matrix error #334
Description
Very often, if the heatpump is not connected correctly, or the energy carriers are not configured properly, the heat pump returns a singular matrix error. This makes it hard to debug, since it is not clear where the error is. From a user perspective, it would be quite efficient if some checks were performed at the heatpump before adding it to the system. That way, the errors it returns would allow for a faster debugging process.