It's a replacement for an ancient Candy dishwasher and the new drain hose (supplied with machine) is connected to the house drain as the old one was. The drainage hose is positioned to the manufacturers recommended height with no kinks or loops. There was some drainage after the 1st wash but never fully drained. I checked the drainage pipe and there are no blockages of food or debris.
It was connected via a stand pipe.
The drainage doesn't seem to be the problem. The machine is fully drained and now won't pull water in. Nothing happens when I turn the machine on, no water going into the machine.
This is why I suspect the anti-flood system was triggered and won't reset. Machine won't fill with water at all so I can't test the drainage any further. This is brand new machine, the previous machine drained just fine before I de-installed it. Hope this helps.
I did mention in my original question that I believed the anti-flood device had been triggered and that's why I was asking for a factory default reset (to reset the anti-flood device) and under the heading 'Already tried' that I had checked for blockages.
This is an economy model, no alarms and no flashing lights unfortunately. Nothing to indicate that the anti-flood device has been triggered.
Thank you for your time.