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This started happening with motor loaded. This will not affect peristaltic pump if no load. When we first receive machine we had to make sure pumps run when needed so we had dry runs no load, ran fine. The other two pumps run fine at the moment.

Mike, yes done all of the above. No changes at all. First step replace Inverter then ill go from there. Thanks

itsmoked.. This is a peristaltic pump, pumping liquid to our batch. At this time it we are not even pumping anything. Have taken the hose out just running the motor. It reverses and goes forward after every speed increment down. waross,... I too think it is a programming issue because you...

Is this all info you need Lukin1977?

I have a peristaltic pump that when I increment down by one, the motor reverses itself. Every increment down it does the same thing. Also it will not increment up, so don't know if it is the motor, the Lenze frequency inverter, or the programing on the touchscreen or plc. It has never done this...