Call the manufacturer for diagnosis. Pfeiffer is great at helping out. -- Charlotte Lehmann Assistant in Instruction Bates College Department of Geology 206A Carnegie Science Building 44 Campus Avenue Lewiston, ME 04240 Phone: 207-786-6485 FAX: 207-786-8334 Quoting Peter Swart <[log in to unmask]>: > We had to turn off the power to our Kiel and the turbo does not come > back. We get a series of red leds, rather than the normal green led. > I assume this is bad news, either the controller or the pump. Does > anyone know what the red leds mean.