Index: firmware/App/Controllers/ConcentratePumps.c
===================================================================
diff -u -r8ebab816fadec93b2f3c6a42f15a07c26b3a4f59 -r988ec87fdef86bf72d1c23f69bea0509107f4fbc
--- firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision 8ebab816fadec93b2f3c6a42f15a07c26b3a4f59)
+++ firmware/App/Controllers/ConcentratePumps.c	(.../ConcentratePumps.c)	(revision 988ec87fdef86bf72d1c23f69bea0509107f4fbc)
@@ -907,7 +907,7 @@
 static void monitorPumpSpeed( CONCENTRATE_PUMPS_T pumpId, ALARM_ID_T alarm )
 {
     F32 cpTargetSpeed = concentratePumps[ pumpId ].currentPumpSpeed;
-    F32 cpError       = fabs( getMeasuredPumpSpeedMLPM( pumpId ) - cpTargetSpeed );
+    F32 cpError       = fabs( fabs( getMeasuredPumpSpeedMLPM( pumpId ) ) - cpTargetSpeed );
     BOOL isCpSpeedOut = FALSE;
     F32 tolerance     = CONCENTRATE_PUMP_SPD_OUT_OF_RANGE_TOL_WHEN_SLOW_MLPM;