Need some advice on sewage pumping stations, our company has recently started to look after them as they were neglected for years so we are flying by the seat of our pants at the minute. We have status dm3420 controllers on the panel and they are set up according to the depth of each wet well. They activate a warning light in two scenarios either very high level or very low level. The issue is that when it reaches very low level the warning light comes on but when the level reaches an acceptable level the warning light stays on instead of resetting and turning the light off leading to one of us being called out to a fault. I have tried forcing the issue by leaving the pumps running below the usual level of where they cut off normally to try and get the low level light to come incase the levels are close together but after an extra meter of pumping it seems that the levels are far enough apart to allow a run on of the pumps. Has anyone used the status dm3420 controllers before that can shed some light on this or should we order another 2 controllers, as there is only 2 out of 30 that seem to have this problem at the moment.
thanks Alan
thanks Alan
