Index: AlarmDefs.h
===================================================================
diff -u -r3b08252bf0110d860e3776ae8035c4b2efc70f76 -rc9dfd203b788df6bdfc3779800425c47095c8c47
--- AlarmDefs.h	(.../AlarmDefs.h)	(revision 3b08252bf0110d860e3776ae8035c4b2efc70f76)
+++ AlarmDefs.h	(.../AlarmDefs.h)	(revision c9dfd203b788df6bdfc3779800425c47095c8c47)
@@ -306,8 +306,7 @@
     ALARM_ID_UI_POST_FAILURE_BLUETOOTH      = 267,                          ///< UI POST Bluetooth failure.
     ALARM_ID_UI_POST_FAILURE_ETHERNET       = 268,                          ///< UI POST Ethernet failure.
     ALARM_ID_UI_POST_FAILURE_SOUND          = 269,                          ///< UI POST Sound failure.
-
-
+    ALARM_ID_HD_FAN_RPM_OUT_OF_RANGE = 270,                                 ///< HD Fan RPM out of range
     NUM_OF_ALARM_IDS                                                        ///< Total number of alarms
 };
 typedef enum Alarm_List ALARM_ID_T;                                 ///< Type for alarm list enumeration
@@ -696,6 +695,7 @@
     { ALARM_PRIORITY_HIGH,   999,  FALSE, FALSE, FALSE, TRUE , FALSE, TRUE , TRUE , TRUE , FALSE, FALSE, TRUE , FALSE, ALARM_ID_UI_POST_FAILURE_BLUETOOTH,                        0,              ALARM_ID_NO_ALARM },
     { ALARM_PRIORITY_HIGH,   999,  FALSE, FALSE, FALSE, TRUE , FALSE, TRUE , TRUE , TRUE , FALSE, FALSE, TRUE , FALSE, ALARM_ID_UI_POST_FAILURE_ETHERNET,                         0,              ALARM_ID_NO_ALARM },
     { ALARM_PRIORITY_HIGH,   999,  FALSE, FALSE, FALSE, TRUE , FALSE, TRUE , TRUE , TRUE , FALSE, FALSE, TRUE , FALSE, ALARM_ID_UI_POST_FAILURE_SOUND,                            0,              ALARM_ID_NO_ALARM },
+    { ALARM_PRIORITY_HIGH,   799,  FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, FALSE, ALARM_ID_HD_FAN_RPM_OUT_OF_RANGE,                          0,              ALARM_ID_NO_ALARM },
 };  //   Priority            Rank  Fault DGFault Stops  ClrIm  NoClr  NoRes  NoRin  NoEnd  NoNew  NoRcr  UsrAck TxLog  ID                                                        Escalate In     Escalate To
 
 /// Table of alarms and their rank.
@@ -927,6 +927,7 @@
     { 799, ALARM_ID_DG_HEATERS_ON_WITH_NO_FLOW_TIMEOUT },
     { 799, ALARM_ID_DG_DRAIN_CIRCULATION_LINE_TIMEOUT },
     { 799, ALARM_ID_HD_BATTERY_PACK_ERROR_DETECTED },
+    { 799, ALARM_ID_HD_FAN_RPM_OUT_OF_RANGE },
     { 800, ALARM_ID_BLOOD_SITTING_WARNING },
     { 801, ALARM_ID_END_OF_TREATMENT_ALARM },
     { 802, ALARM_ID_PRIME_COMPLETED_MEDIUM },
Index: MsgDefs.h
===================================================================
diff -u -r305a3b8b1358dae02880dc06db55173207e73298 -rc9dfd203b788df6bdfc3779800425c47095c8c47
--- MsgDefs.h	(.../MsgDefs.h)	(revision 305a3b8b1358dae02880dc06db55173207e73298)
+++ MsgDefs.h	(.../MsgDefs.h)	(revision c9dfd203b788df6bdfc3779800425c47095c8c47)
@@ -192,8 +192,8 @@
     MSG_ID_REQUEST_HD_USAGE_INFO = 0xA0,                                ///< HD request usage information
     MSG_ID_DG_SWITCHES_DATA = 0xA1,                                     ///< DG switches data publish
     MSG_ID_HD_SWITCHES_DATA = 0xA2,                                     ///< HD switches data publish
+    MSG_ID_HD_FANS_DATA = 0xA3,                                         ///< HD fans data publish
 
-
 #ifdef EMC_TEST_BUILD
     MSG_ID_CAN_ERROR_COUNT = 0x999,  // test code in support of EMC testing
 #endif
@@ -301,7 +301,8 @@
     MSG_ID_HD_SWITCHES_PUBLISH_INTERVAL_OVERRIDE = 0x8063,              ///< HD switches data publish override request
     MSG_ID_HD_BATTERY_REMAINING_PERCENT_OVERRIDE = 0x8064,              ///< HD battery remaining percent override request
     MSG_ID_HD_TEMPERATURES_VALUE_OVERRIDE = 0x8065,                     ///< HD temperatures value override request
-    MSG_ID_HD_TEMPERATURES_PUBLISH_INTERVAL_OVERRIDE = 0x8066,         ///< HD temperatures data publish override request
+    MSG_ID_HD_TEMPERATURES_PUBLISH_INTERVAL_OVERRIDE = 0x8066,          ///< HD temperatures data publish override request
+    MSG_ID_HD_FANS_PUBLISH_INTERVAL_OVERRIDE = 0x8067,                  ///< HD fans data publish override request
 
     MSG_ID_FIRST_DG_TESTER_MESSAGE = 0xA000,                            ///< First DG test message ID
     MSG_ID_DG_TESTER_LOGIN_REQUEST = MSG_ID_FIRST_DG_TESTER_MESSAGE,    ///< DG tester log-in