Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -r1e0b16e5778ecf2870fcb65a8b9b9b27d09f70ae -rebb9ab624960bcd1c09b6fc8def4654bb6f0cc3b
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 1e0b16e5778ecf2870fcb65a8b9b9b27d09f70ae)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision ebb9ab624960bcd1c09b6fc8def4654bb6f0cc3b)
@@ -8,7 +8,7 @@
 * @file    ModeFill.c
 *
 * @author  (last)      Dara Navaei
-* @date    (last)      21-Mar-2023
+* @date    (last)      28-Mar-2023
 *
 * @author  (original)  Leonardo Baloa
 * @date    (original)  19-Nov-2019
@@ -139,6 +139,9 @@
 
 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.
+// NOTE: This variable should be initialized here because the init function is called every time and then this variable is set to FALSE even if the settings from the
+// UI wants the RO only mode.
+static BOOL hasROOnlyModeBeenEnabled = FALSE;                                                                ///< 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,
@@ -166,10 +169,7 @@
  * @brief
  * The initFillMode function initializes the fill mode module.
  * @details Inputs: none
- * @details Outputs: fillState, dialysateFillStartTime, reservoirBaseWeight,
- * totalROFlowRateMLPM, concentrateTestStartTime, acidConductivityTotal,
- * bicarbConductivityTotal, conductivitySampleCount, havePauseActuatorsBeenSet
- * concentratePumpPrimeCount
+ * @details Outputs: fill mode variables initialized.
  * @return none
  *************************************************************************/
 void initFillMode( void )
@@ -439,6 +439,7 @@
  * @details Inputs: none
  * @details Outputs: none
  * @param flag to TRUE if prime is needed otherwise FALSE
+ * @return none
  *************************************************************************/
 void setThisFisrtFillFlag( BOOL flag )
 {
@@ -447,6 +448,33 @@
 
 /*********************************************************************//**
  * @brief
+ * The enableROOnlyMode function sets the boolean flag that indicates RO
+ * only mode has been enabled.
+ * @details Inputs: none
+ * @details Outputs: hasROOnlyModeBeenEnabled
+ * @param enableROOnlyMode TRUE if the RO only mode is requested otherwise, FALSE
+ * @return none
+ *************************************************************************/
+void setROMode( BOOL enableROOnlyMode )
+{
+    hasROOnlyModeBeenEnabled = enableROOnlyMode;
+}
+
+/*********************************************************************//**
+ * @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.
@@ -848,7 +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 ) && ( isROOnlyModeEnabled() != TRUE ) )
                 {
                     // 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 );
@@ -1064,6 +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 ) );