I hope someone out there can help! This is our first post on this forum. We have just spent 3 days in our 2005 CI Riviera 55P Special, only took delivery 10 days ago. It's our first van. It's on a 2.8HDi Citroen Jumper. Thought we'd have a few days away to test it all before the granddaughter arrives tomorrow for the 'Easter' hols. We've come back with a problem we can't seem to solve. We have a control panel Nordelettronica NE152 and have a persistent flashing green light on the drinking water tank logo and above that a persistent flashing red light on the S1 tank which has the letter 'R' next to it. We thought these should only come on when you pressed the buttons to check the water levels, we can't get them to switch off, has anyone any ideas?