Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -rd26566bb6c761238ae6526ce2284ab689f6abf4d -r4b37115aead2565979d889518c492389757a6346
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision d26566bb6c761238ae6526ce2284ab689f6abf4d)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 4b37115aead2565979d889518c492389757a6346)
@@ -78,6 +78,7 @@
 static DG_STANDBY_MODE_STATE_T handleStandbyFlushFilterState( void );
 static DG_STANDBY_MODE_STATE_T handleStandbyFlushFilterIdleState( void );
 static DG_STANDBY_MODE_STATE_T handleStandbySampleWaterState( void );
+static DG_STANDBY_MODE_STATE_T handleStandbyPauseState( void );
 
 /*********************************************************************//**
  * @brief
@@ -149,8 +150,7 @@
     if ( TRUE == areInletWaterConditionsAlarmsActive() )
     {
         setValveState( VSP, VALVE_STATE_CLOSED );
-        stopSampleWaterRequest = FALSE;
-        standbyState           = DG_STANDBY_MODE_STATE_FLUSH_FILTER_IDLE;
+        standbyState = DG_STANDBY_MODE_STATE_PAUSE;
     }
 
     // execute current Standby state
@@ -172,6 +172,10 @@
             standbyState = handleStandbySampleWaterState();
             break;
 
+        case DG_STANDBY_MODE_STATE_PAUSE:
+            standbyState = handleStandbyPauseState();
+            break;
+
         default:
             SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_SOFTWARE_FAULT, SW_FAULT_ID_STANDBY_MODE_INVALID_EXEC_STATE, standbyState )
             standbyState = DG_STANDBY_MODE_STATE_IDLE;
@@ -200,14 +204,14 @@
         checkInletWaterTemperature();
         checkInletWaterPressure();
 
-        status |= isAlarmActive( ALARM_ID_DG_INLET_WATER_CONDUCTIVITY_IN_LOW_RANGE );
-        status |= isAlarmActive( ALARM_ID_DG_INLET_WATER_CONDUCTIVITY_IN_HIGH_RANGE );
-        status |= isAlarmActive( ALARM_ID_DG_INLET_WATER_TEMPERATURE_IN_HIGH_RANGE );
-        status |= isAlarmActive( ALARM_ID_DG_INLET_WATER_TEMPERATURE_IN_LOW_RANGE );
-        status |= isAlarmActive( ALARM_ID_DG_OUTLET_PRIMARY_CONDUCTIVITY_OUT_OF_RANGE );
-        status |= isAlarmActive( ALARM_ID_DG_RO_REJECTION_RATIO_OUT_OF_RANGE );
-        status |= isAlarmActive( ALARM_ID_DG_INLET_WATER_PRESSURE_IN_HIGH_RANGE );
-        status |= isAlarmActive( ALARM_ID_DG_INLET_WATER_PRESSURE_IN_LOW_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_INLET_WATER_CONDUCTIVITY_IN_LOW_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_INLET_WATER_CONDUCTIVITY_IN_HIGH_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_INLET_WATER_TEMPERATURE_IN_HIGH_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_INLET_WATER_TEMPERATURE_IN_LOW_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_OUTLET_PRIMARY_CONDUCTIVITY_OUT_OF_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_RO_REJECTION_RATIO_OUT_OF_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_INLET_WATER_PRESSURE_IN_HIGH_RANGE );
+        status |= isAlarmConditionActive( ALARM_ID_DG_INLET_WATER_PRESSURE_IN_LOW_RANGE );
     }
 
     return status;
@@ -331,9 +335,8 @@
 {
     DG_STANDBY_MODE_STATE_T state = DG_STANDBY_MODE_STATE_FLUSH_FILTER_IDLE;
 
-    if ( ( TRUE == startSampleWaterRequest ) && ( FALSE == areInletWaterConditionsAlarmsActive() ) )
+    if ( TRUE == startSampleWaterRequest )
     {
-        startSampleWaterRequest = FALSE;
         waterSampleStartTime = getMSTimerCount();
         setValveState( VPI, VALVE_STATE_OPEN );
         setValveState( VSP, VALVE_STATE_OPEN );
@@ -347,6 +350,8 @@
         state = DG_STANDBY_MODE_STATE_IDLE;
     }
 
+    startSampleWaterRequest = FALSE;
+
     return state;
 }
 
@@ -362,7 +367,7 @@
 {
     DG_STANDBY_MODE_STATE_T state = DG_STANDBY_MODE_STATE_SAMPLE_WATER;
 
-    // After HD requests to stop or 10 seconds has elapsed, close and return to idle state
+   // After HD requests to stop or 10 seconds has elapsed, close and return to idle state
     if ( ( TRUE == stopSampleWaterRequest ) || ( TRUE == didTimeout( waterSampleStartTime, MAX_WATER_SAMPLE_TIME_MS ) ) )
     {
         stopSampleWaterRequest = FALSE;
@@ -376,6 +381,26 @@
 
 /*********************************************************************//**
  * @brief
+ * The handleStandbyPauseState function executes the pause state.
+ * @details Inputs: none
+ * @details Outputs: filterFlushStartTime
+ * @return the next state
+ *************************************************************************/
+static DG_STANDBY_MODE_STATE_T handleStandbyPauseState( void )
+{
+    DG_STANDBY_MODE_STATE_T state = DG_STANDBY_MODE_STATE_PAUSE;
+
+    if ( FALSE == areInletWaterConditionsAlarmsActive() )
+    {
+        filterFlushStartTime = getMSTimerCount();
+        state                = DG_STANDBY_MODE_STATE_FLUSH_FILTER;
+    }
+
+    return state;
+}
+
+/*********************************************************************//**
+ * @brief
  * The requestWaterSample function handles an HD request to sample water.
  * @details Inputs: standbyState
  * @details Outputs: pendingSampleWaterRequest