Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -r6742785597228dba2009e73a9de3f85024d4c82a -rc76b19226ffe463dbaa428f6af0659561d05db9f
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision 6742785597228dba2009e73a9de3f85024d4c82a)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision c76b19226ffe463dbaa428f6af0659561d05db9f)
@@ -268,11 +268,11 @@
             targetSpeed_ml_min *= -1.0;
         }
 
-        if ( targetSpeed_ml_min <= CONCENTRATE_PUMP_MAX_SPEED )
+        if ( ( CONCENTRATE_PUMP_MIN_SPEED <= targetSpeed_ml_min ) && ( targetSpeed_ml_min <= CONCENTRATE_PUMP_MAX_SPEED ) )
         {
             concentratePumps[ pumpId ].pumpTargetSpeed = targetSpeed_ml_min;
         }
-        else if ( CONCENTRATE_PUMP_MIN_SPEED <= targetSpeed_ml_min )
+        else if ( targetSpeed_ml_min < CONCENTRATE_PUMP_MIN_SPEED )
         {
             concentratePumps[ pumpId ].pumpTargetSpeed = 0.0;
         }