Index: firmware/App/Modes/ModeTreatment.c
===================================================================
diff -u -r03ca1896138e7ec112b949cfa0195eb6eb31335b -r5a6f0b9a41702cf284db0a356261da21f06c0bfc
--- firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision 03ca1896138e7ec112b949cfa0195eb6eb31335b)
+++ firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision 5a6f0b9a41702cf284db0a356261da21f06c0bfc)
@@ -1119,7 +1119,9 @@
     // Check if we are in an appropriate treatment state for settings adjustment
     if ( ( MODE_TREA == currMode ) &&
          ( currentTreatmentState > TREATMENT_START_STATE ) && ( currentTreatmentState < TREATMENT_END_STATE ) &&
-         ( uFVolume <= ( getF32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_UF_VOLUME ) * ML_PER_LITER ) ) && ( uFVolume > colUFVol ) &&
+         ( uFVolume >= ( getF32TreatmentParamLowerRangeLimit( TREATMENT_PARAM_UF_VOLUME ) * ML_PER_LITER ) ) &&
+         ( uFVolume <= ( getF32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_UF_VOLUME ) * ML_PER_LITER ) ) &&
+         ( uFVolume > colUFVol ) &&
          ( CALC_TREAT_TIME_REMAINING_IN_SECS() >= PREVENT_UF_VOL_CHANGE_IF_NEARLY_DONE_SEC ) )
     {
         DIALYSIS_STATE_T currDialysisState = getDialysisState();