Index: firmware/App/Services/SystemCommMessages.c
===================================================================
diff -u -r6081643fbc7826ec53b9eb158481bdce6799ef7e -r01391d9a66d4a2d6266366d0f838c08041d2d18c
--- firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 6081643fbc7826ec53b9eb158481bdce6799ef7e)
+++ firmware/App/Services/SystemCommMessages.c	(.../SystemCommMessages.c)	(revision 01391d9a66d4a2d6266366d0f838c08041d2d18c)
@@ -871,26 +871,34 @@
 
         memcpy( &cmd, message->payload, sizeof(U32) );
 
-        if ( DG_DISINFECT_FLUSH_STATE == cmd )         // Command 0 = Flush
+        if ( DG_DISINFECT_FLUSH_STATE == cmd )                          // Command 0 = Flush
         {
             result = signalUserInitiateFlushMode();
         }
-        else if ( DG_DISINFECT_HEAT_STATE == cmd )    // Command 1 = Heat disinfect
+        else if ( DG_DISINFECT_HEAT_STATE_ACTIVE_COOL == cmd )          // Command 1 = Heat disinfect active cool
         {
-            result = signalUserInitiateHeatDisinfectMode();
+            result = signalUserInitiateHeatDisinfectActiveCoolMode();
         }
-        else if ( DG_DISINFECT_CHEM_STATE == cmd )   // Command 2 = chemical disinfect
+        else if ( DG_DISINFECT_CHEM_STATE == cmd )                      // Command 2 = chemical disinfect
         {
             result = signalUserInitiateChemicalDisinfectMode();
         }
-        else if ( DG_DISINFECT_CHEM_FLUSH_STATE == cmd )  // Command 3 = chemical disinfect flush
+        else if ( DG_DISINFECT_CHEM_FLUSH_STATE == cmd )                // Command 3 = chemical disinfect flush
         {
             result = signalUserInitiateChemicalDisinfectFlushMode();
         }
-        else if ( DG_DISINFECT_RO_PERMEATE_SAMPLE_STATE == cmd ) // Command 4 = RO permeate sample
+        else if ( DG_DISINFECT_RO_PERMEATE_SAMPLE_STATE == cmd )        // Command 4 = RO permeate sample
         {
             result = signalUserInitiateROPermeateSampleMode();
         }
+        else if ( DG_DISINFECT_HEAT_STATE_PASSIVE_COOL == cmd )         // Command 5 = Heat disinfect passive coode
+        {
+            result = signalUserInitiateHeatDisinfectPassiveCoolMode();
+        }
+        else if ( DG_DISINFECT_ACTIVE_COOL == cmd )                     // Command 6 = Active cool
+        {
+            result = signalUserInitiateActiveCoolMode();
+        }
     }
 
     sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_HD_2_UI, result );
@@ -1806,21 +1814,22 @@
 
 /*********************************************************************//**
  * @brief
- * The sendDGStartHeatDisinfectModeCommand function constructs a DG start/stop
- * heat disinfect mode command message and queues the msg for transmit on
- * the appropriate CAN channel.
+ * The sendDGStartHeatDisinfectActiveCoolModeCommand function constructs a
+ * DG start/stop heat disinfect with active coolmode command message and
+ * queues the msg for transmit on the appropriate CAN channel.
  * @details Inputs: none
  * @details Outputs: DG start heat disinfect mode command msg constructed
  * and queued.
  * @param start TRUE indicates start heat disinfect mode
  * @return TRUE if msg successfully queued for transmit, FALSE if not
  *************************************************************************/
-BOOL sendDGStartHeatDisinfectModeCommand( BOOL start )
+BOOL sendDGStartHeatDisinfectActiveCoolModeCommand( BOOL start )
 {
     BOOL result;
     MESSAGE_T msg;
     DG_HEAT_DISINFECTION_MODE_CMD_T cmd;
 
+    // Start command
     cmd.start = start;
 
     // Create a message record
@@ -3431,16 +3440,18 @@
 void handleHDUsageInfoRequest( MESSAGE_T *message )
 {
     MESSAGE_T msg;
-    U32 payload = 0; // TODO update this one implemented
+    HD_USAGE_INFO_RECORD_T usageRecord;
     U08 *payloadPtr = msg.payload;
 
+    getNVRecord2Driver( GET_USAGE_RECORD, (U08*)&usageRecord, sizeof( HD_USAGE_INFO_RECORD_T ), 0, ALARM_ID_NO_ALARM );
+
     // Create a message record
     blankMessage( &msg );
-    msg.hdr.msgID = MSG_ID_HD_USAGE_DATA;
-    msg.hdr.payloadLen = sizeof( U32 );
+    msg.hdr.msgID      = MSG_ID_HD_USAGE_DATA;
+    msg.hdr.payloadLen = sizeof( HD_USAGE_INFO_RECORD_T );
 
     // Fill message payload
-    memcpy( payloadPtr, &payload, sizeof( U32 ) );
+    memcpy( payloadPtr, &usageRecord, sizeof( HD_USAGE_INFO_RECORD_T ) );
 
     // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
     serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_UI, ACK_REQUIRED );
@@ -3542,13 +3553,14 @@
  * active cool mode command
  * @details Inputs: none
  * @details Outputs: none
+ * @param start the boolean flag to indicate whether to start or stop the
+ * active cool
  * @return TRUE if the command was serialized successfully
  *************************************************************************/
-BOOL sendDGStopActiveCoolModeCommand( void )
+BOOL sendDGStopActiveCoolModeCommand( BOOL start )
 {
     BOOL result;
     MESSAGE_T msg;
-    BOOL start = FALSE;
 
     // Create a message record
     blankMessage( &msg );
@@ -3714,7 +3726,38 @@
     sendAckResponseMsg( (MSG_ID_T)message->hdr.msgID, COMM_BUFFER_OUT_CAN_HD_2_UI, FALSE );
 }
 
+/*********************************************************************//**
+ * @brief
+ * The sendDGStartHeatDisinfectPassiveCoolModeCommand function handles the send
+ * request to start or stop nocturnal heat disinfect.
+ * @details Inputs: none
+ * @details Outputs: none
+ * @param start TRUE indicates start heat disinfect mode
+ * @return none
+ *************************************************************************/
+BOOL sendDGStartHeatDisinfectPassiveCoolModeCommand( BOOL start )
+{
+    BOOL result;
+    MESSAGE_T msg;
+    DG_HEAT_DISINFECTION_MODE_CMD_T cmd;
 
+    // Start command
+    cmd.start = start;
+
+    // Create a message record
+    blankMessage( &msg );
+    msg.hdr.msgID = MSG_ID_DG_START_STOP_PASSIVE_COOL_HEAT_DISINFECT;
+    msg.hdr.payloadLen = sizeof( DG_HEAT_DISINFECTION_MODE_CMD_T );
+
+    memcpy( &msg.payload, &cmd, sizeof( DG_HEAT_DISINFECTION_MODE_CMD_T ) );
+
+    // Serialize the message (w/ sync, CRC, and appropriate CAN padding) and add serialized message data to appropriate comm buffer
+    result = serializeMessage( msg, COMM_BUFFER_OUT_CAN_HD_2_DG, ACK_REQUIRED );
+
+    return result;
+}
+
+
 /*************************************************************************
  *                       TEST SUPPORT FUNCTIONS
  *************************************************************************/