Index: firmware/App/Services/TxParams.c
===================================================================
diff -u -rf003eac4b2d64a8ac4593703ade39cc919edb33a -r8a64e088ad94c025fba8c5dac4e9839feff20fd6
--- firmware/App/Services/TxParams.c	(.../TxParams.c)	(revision f003eac4b2d64a8ac4593703ade39cc919edb33a)
+++ firmware/App/Services/TxParams.c	(.../TxParams.c)	(revision 8a64e088ad94c025fba8c5dac4e9839feff20fd6)
@@ -722,8 +722,8 @@
  * @brief
  * The checkUFDependencies function validates set ultrafiltration
  * volume treatment parameter.
- * @details \b Inputs: none
- * @details \b Outputs: none
+ * @details \b Inputs: stagedParams[]
+ * @details \b Outputs: reasons[]
  * @return TRUE if ultrafiltration dependencies are ok, FALSE if not
  *************************************************************************/
 static BOOL checkUFDependencies( U32 *reasons )
@@ -745,7 +745,7 @@
     {
         // Weights are valid - Calculate UF volume
         derivedUFVolumeL = preWeight - targetWeight;
-        if ( uFVolumeL < NEARLY_ZERO && derivedUFVolumeL > NEARLY_ZERO )
+        if ( uFVolumeL < NEARLY_ZERO && derivedUFVolumeL >= 0.0F )
         {
             // Update UF volume with calculated UF volume
             stagedParams[ TREATMENT_PARAM_UF_VOLUME ].sFlt = derivedUFVolumeL;
@@ -762,7 +762,7 @@
         }
     }
     // provided a non-zero UF volume instead of weights
-    else if ( ( uFVolumeL > NEARLY_ZERO ) && ( preWeight < NEARLY_ZERO ) && ( targetWeight < NEARLY_ZERO ) )
+    else if ( ( uFVolumeL >= 0.0F ) && ( preWeight < NEARLY_ZERO ) && ( targetWeight < NEARLY_ZERO ) )
     {
         result = TRUE;
     }