Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -r5a36a768d11cc597a36b894c1fb3a5e5590130f1 -re44aad7a9d5fa48aeaa55c65bd28ad9acde6ce05
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 5a36a768d11cc597a36b894c1fb3a5e5590130f1)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision e44aad7a9d5fa48aeaa55c65bd28ad9acde6ce05)
@@ -19,6 +19,7 @@
 #include "CPLD.h"
 #include "DrainPump.h"
 #include "Heaters.h"
+#include "ModeFault.h"
 #include "ModeStandby.h"
 #include "OperationModes.h"
 #include "Pressures.h"
@@ -98,6 +99,8 @@
     // re-initialize standby mode each time we transition to standby mode
     initStandbyMode();
 
+    //deenergizeActuators();
+
     // set initial actuator states
     setValveState( VRF, VALVE_STATE_R2_C_TO_NO );
     setValveState( VRI, VALVE_STATE_R1_C_TO_NO );
@@ -191,7 +194,7 @@
         filterFlushStartTime = getMSTimerCount();
         setValveState( VPI, VALVE_STATE_OPEN );
 #ifndef V_2_SYSTEM
-        setValveState( VPD, VALVE_STATE_OPEN_C_TO_NC );
+        setValveState( VPD, VALVE_STATE_DRAIN_C_TO_NO );
 #else
         setValveState( VPD, VALVE_STATE_OPEN );  // TODO: VPD drain state is closed for V3
 #endif
@@ -223,6 +226,7 @@
 
     if ( TRUE == didTimeout( filterFlushStartTime, filterFlushTimePeriod_ms ) )
     {
+        setValveState( VPI, VALVE_STATE_CLOSED );
         state = DG_STANDBY_MODE_STATE_FLUSH_FILTER_IDLE;
     }
 
@@ -288,6 +292,7 @@
     // 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;
         setValveState( VSP, VALVE_STATE_CLOSED );
 #ifndef V_2_SYSTEM
         setValveState( VPD, VALVE_STATE_DRAIN_C_TO_NO );
@@ -420,7 +425,28 @@
          ( DG_MODE_SOLO == getCurrentOperationMode() ) )
     {
         requestNewOperationMode( DG_MODE_HEAT );
+        status = TRUE;
+    }
 
+    return status;
+}
+
+/*********************************************************************//**
+ * @brief
+ * The startDGChemicalDisinfect function starts chemical disinfect mode.
+ * @details Inputs: standbyState
+ * @details Outputs: none
+ * @return: TRUE if the switch was successful
+ *************************************************************************/
+BOOL startDGChemicalDisinfect( void )
+{
+    BOOL status = FALSE;
+
+    // If DG is in standby mode and the standby mode is in Idle, request chemical disinfect
+    // Chemical disinfect cannot be run in solo mode because the user has to confirm that the acid is inserted or removed
+    //if ( ( DG_MODE_STAN == getCurrentOperationMode() ) && ( DG_STANDBY_MODE_STATE_IDLE == standbyState ) ) TODO un-comment this line. This is commented to be able to run chemical without HD for development
+    {
+        requestNewOperationMode( DG_MODE_CHEM );
         status = TRUE;
     }