Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -re95b1d3c47166be8a6852818a70b4c6231881b86 -r4a1a7453b6c1bc707bcf20e1b2df02f3980c729c
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision e95b1d3c47166be8a6852818a70b4c6231881b86)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 4a1a7453b6c1bc707bcf20e1b2df02f3980c729c)
@@ -950,17 +950,25 @@
     checkInletWaterPressure();
 
     // Check if any of the alarms are active
-    if ( ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_CONDUCTIVITY_IN_LOW_RANGE ) )  ||
-         ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_CONDUCTIVITY_IN_HIGH_RANGE ) ) ||
-         ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_TEMPERATURE_IN_HIGH_RANGE ) )  ||
-         ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_TEMPERATURE_IN_LOW_RANGE ) )   ||
+    if ( ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_CONDUCTIVITY_IN_LOW_RANGE ) )        ||
+         ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_CONDUCTIVITY_IN_HIGH_RANGE ) )       ||
+         ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_TEMPERATURE_IN_HIGH_RANGE ) )        ||
+         ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_TEMPERATURE_IN_LOW_RANGE ) )         ||
+         ( TRUE == isAlarmActive( ALARM_ID_DG_OUTLET_PRIMARY_CONDUCTIVITY_OUT_OF_RANGE ) )  ||
+         ( TRUE == isAlarmActive( ALARM_ID_RO_REJECTION_RATIO_OUT_OF_RANGE ) )              ||
          ( TRUE == isAlarmActive( ALARM_ID_INLET_WATER_PRESSURE_IN_LOW_RANGE ) ) )
     {
         status = TRUE;
     }
 
     return status;
 }
+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 )
+{
+// 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 );
 
 /*********************************************************************//**
  * @brief