The holding tank has been pumped out and rinsed. So far as I can tell the pipework between the unit and the holding tank is not blocked. In operation, the unit works to some degree in Normal flush mode but the lack of power becomes evident as it tries to drain the sump. In Eco mode it does a poor job of draining the sump, and in Empty mode the macerator can be heard running but it does not drain the sump.
What sump??? Are you trying to use the toilet to dump the tank??? I'm gonna need a LOT more information to help you with this one!
Meanwhile, if whatever you're doing has worked previously to dump the tank, check the tank vent for a blockage. A main funtion of a vent is to provide source of air to replace contents as they're being pulled out...if insufficient or NO air can come in, the pump can't pull much if anything out.
The two most common locations for a vent blockage are the vent thru-hull and the other end of the vent line--that end of the hose and the vent fitting on the tank. Clean those out and I suspect your problem may be solved
. However, unless I'm just not reading your post correctly, it might be a good idea if you learned what does what in your sanitation system...'cuz the Sanimarin is a toilet and toilets don't dump tanks
. I 'll be glad to help you with that.