Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -rc230be1bd4296324bf5dfc288c212eb7c2ce5d2d -rb0f90032367640dd22ddfbe0307a20cb6e931ceb
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision c230be1bd4296324bf5dfc288c212eb7c2ce5d2d)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision b0f90032367640dd22ddfbe0307a20cb6e931ceb)
@@ -139,6 +139,7 @@
 
 static U32 pumpSpeedIndex;                                                                                   ///< Index used to access the desired pump speed in roPumpFlushBubblesSpeed table.
 static BOOL havePauseActuatorsBeenSet;                                                                       ///< Flag to indicate the actuators have been set to pause for the first time.
+static BOOL hasROOnlyModeBeenEnabled;                                                                        ///< Flag to indicate the RO only mode has been set or not.
 static OVERRIDE_F32_T usedAcidVolumeML = { 0.0, 0.0, 0.0, 0.0 };                                             ///< The integrated acid concentration volume has been used in mL.
 static OVERRIDE_F32_T usedBicarbVolumeML = { 0.0, 0.0, 0.0, 0.0 };                                           ///< The integrated bicarb concentration volume has been used in mL.
 static OVERRIDE_U32_T fillModeDataPublishInterval = { FILL_MODE_DATA_PUB_INTERVAL,
@@ -169,7 +170,7 @@
  * @details Outputs: fillState, dialysateFillStartTime, reservoirBaseWeight,
  * totalROFlowRateMLPM, concentrateTestStartTime, acidConductivityTotal,
  * bicarbConductivityTotal, conductivitySampleCount, havePauseActuatorsBeenSet
- * concentratePumpPrimeCount
+ * concentratePumpPrimeCount, hasROOnlyModeBeenEnabled
  * @return none
  *************************************************************************/
 void initFillMode( void )
@@ -197,6 +198,7 @@
     sumFillCPoConductivity        = 0.0F;
     sumFillRejRatio               = 0.0F;
     fillCPoConductivitySampleCnt  = 0;
+    hasROOnlyModeBeenEnabled      = FALSE;
 }
 
 /*********************************************************************//**
@@ -439,6 +441,7 @@
  * @details Inputs: none
  * @details Outputs: none
  * @param flag to TRUE if prime is needed otherwise FALSE
+ * @return none
  *************************************************************************/
 void setThisFisrtFillFlag( BOOL flag )
 {
@@ -447,6 +450,32 @@
 
 /*********************************************************************//**
  * @brief
+ * The enableROOnlyMode function sets the boolean flag that indicates RO
+ * only mode has been enabled.
+ * @details Inputs: none
+ * @details Outputs: hasROOnlyModeBeenEnabled
+ * @return none
+ *************************************************************************/
+void enableROOnlyMode( void )
+{
+    hasROOnlyModeBeenEnabled = TRUE;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The isROOnlyModeEnabled function returns the status of RO only mode.
+ * @details Inputs: none
+ * @details Outputs: none
+ * @return hasROOnlyModeBeenEnabled, TRUE if the RO only mode has been set
+ * otherwise, FALSE
+ *************************************************************************/
+BOOL isROOnlyModeEnabled( void )
+{
+    return hasROOnlyModeBeenEnabled;
+}
+
+/*********************************************************************//**
+ * @brief
  * The handleTestInletWaterState function tests for inlet water quality
  * and if this is the first fill of a treatment, prime the acid and bicarb
  * lines before jumping to dialysate production state.
@@ -847,7 +876,7 @@
                     // Fault alarm per PRS 483
                     SET_ALARM_WITH_2_F32_DATA( ALARM_ID_DG_OUTLET_PRIMARY_CONDUCTIVITY_OUT_OF_RANGE, avgCPo, MAX_CPO_CONDUCTIVITY_ALLOW );
                 }
-                if ( avgRR > MAX_RO_REJECTION_RATIO_ALLOW )
+                if ( ( avgRR > MAX_RO_REJECTION_RATIO_ALLOW ) && ( FALSE == isROOnlyModeEnabled() ) )
                 {
                     // Fault alarm per PRS 483
                     SET_ALARM_WITH_2_F32_DATA( ALARM_ID_RO_REJECTION_RATIO_OUT_OF_RANGE, avgRR, MAX_RO_REJECTION_RATIO_ALLOW );
@@ -1063,6 +1092,7 @@
         fillModeData.usedAcidVolumeML          = getChemicalUsedVolumeML( ACID );
         fillModeData.usedBicarbVolumeML        = getChemicalUsedVolumeML( BICARB );
         fillModeData.integratedVolumeML        = getIntegratedVolumeML();
+        fillModeData.roOnlyModeStatus          = (U32)isROOnlyModeEnabled();
 
         broadcastData( MSG_ID_DG_FILL_MODE_DATA, COMM_BUFFER_OUT_CAN_DG_BROADCAST, (U08*)&fillModeData, sizeof( DG_FILL_MODE_DATA_T ) );