Index: dialin/common/msg_ids.py
===================================================================
diff -u -rbaf6c6eb48eeab63238a8b44c188d2c37f63ecc0 -ra0355d7ec27c00104dac97aadb2b76f69c89ce36
--- dialin/common/msg_ids.py	(.../msg_ids.py)	(revision baf6c6eb48eeab63238a8b44c188d2c37f63ecc0)
+++ dialin/common/msg_ids.py	(.../msg_ids.py)	(revision a0355d7ec27c00104dac97aadb2b76f69c89ce36)
@@ -290,7 +290,7 @@
     MSG_ID_HD_BUBBLE_STATUS_OVERRIDE = 0X805E
     MSG_ID_HD_BLOOD_PRIME_VOLUME_OVERRIDE = 0X805F
     MSG_ID_HD_BUBBLE_SELF_TEST_REQUEST = 0X8060
-    MSG_ID_HD___AVAILABLE_1 = 0X8061
+    MSG_ID_HD_FAN_RPM_ALARM_START_TIME_OFFSET_OVERRIDE = 0x8061
     MSG_ID_HD_SWITCHES_STATUS_OVERRIDE = 0x8062
     MSG_ID_HD_SWITCHES_PUBLISH_INTERVAL_OVERRIDE = 0x8063
     MSG_ID_HD_BATTERY_REMAINING_PERCENT_OVERRIDE = 0x8064
@@ -385,6 +385,7 @@
     MSG_ID_DG_DRAIN_PUMP_MEASURED_RPM_OVERRIDE = 0XA046
     MSG_ID_DG_SUPER_CLEAR_ALARMS_CMD = 0XA047
     MSG_ID_DG_ALARM_INFO_SEND_INTERVAL_OVERRIDE = 0XA048
+    MSG_ID_DG_FAN_RPM_ALARM_START_TIME_OFFSET_OVERRIDE = 0xA049,
 
     MSG_ID_HD_DEBUG_EVENT = 0XFFF1
     MSG_ID_DG_DEBUG_EVENT = 0XFFF2
Index: dialin/dg/fans.py
===================================================================
diff -u -r10fc464de499c61413fa6355fba95665a17accbb -ra0355d7ec27c00104dac97aadb2b76f69c89ce36
--- dialin/dg/fans.py	(.../fans.py)	(revision 10fc464de499c61413fa6355fba95665a17accbb)
+++ dialin/dg/fans.py	(.../fans.py)	(revision a0355d7ec27c00104dac97aadb2b76f69c89ce36)
@@ -234,3 +234,39 @@
         else:
             self.logger.debug("Timeout!!!!")
             return False
+
+    def cmd_fans_rpm_alarm_start_time_offset_override(self, hours: int, minutes: int, reset: int = NO_RESET) -> int:
+        """
+        Constructs and sends the HD fan RPM alarm start time override command
+        Constraints:
+            Must be logged into HD.
+
+        @param hours:  (int) hours that the fan alarm start time must be overridden to
+        @param minutes: (int) minutes that the fan alarm start time must be overridden to
+        @param reset: (int) 1 to reset a previous override, 0 to override
+        @return: 1 if successful, zero otherwise
+        """
+        reset_value = integer_to_bytearray(reset)
+        h = integer_to_bytearray(hours)
+        m = integer_to_bytearray(minutes)
+        payload = reset_value + h + m
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
+                                              message_id=MsgIds.MSG_ID_DG_FAN_RPM_ALARM_START_TIME_OFFSET_OVERRIDE.value,
+                                              payload=payload)
+
+        self.logger.debug("Override fan RPM alarm start time")
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is no content...
+        if received_message is not None:
+
+            self.logger.debug("Set RPM alarm start time to: " +
+                        str(received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]))
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Timeout!!!!")
+            return False
Index: dialin/hd/fans.py
===================================================================
diff -u -r10fc464de499c61413fa6355fba95665a17accbb -ra0355d7ec27c00104dac97aadb2b76f69c89ce36
--- dialin/hd/fans.py	(.../fans.py)	(revision 10fc464de499c61413fa6355fba95665a17accbb)
+++ dialin/hd/fans.py	(.../fans.py)	(revision a0355d7ec27c00104dac97aadb2b76f69c89ce36)
@@ -178,4 +178,40 @@
             return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
         else:
             self.logger.debug("Timeout!!!!")
-            return False
\ No newline at end of file
+            return False
+
+    def cmd_fans_rpm_alarm_start_time_offset_override(self, hours: int, minutes: int, reset: int = NO_RESET) -> int:
+        """
+        Constructs and sends the HD fan RPM alarm start time override command
+        Constraints:
+            Must be logged into HD.
+
+        @param hours:  (int) hours that the fan alarm start time must be overridden to
+        @param minutes: (int) minutes that the fan alarm start time must be overridden to
+        @param reset: (int) 1 to reset a previous override, 0 to override
+        @return: 1 if successful, zero otherwise
+        """
+        reset_value = integer_to_bytearray(reset)
+        h = integer_to_bytearray(hours)
+        m = integer_to_bytearray(minutes)
+        payload = reset_value + h + m
+
+        message = DenaliMessage.build_message(channel_id=DenaliChannels.dialin_to_hd_ch_id,
+                                              message_id=MsgIds.MSG_ID_HD_FAN_RPM_ALARM_START_TIME_OFFSET_OVERRIDE.value,
+                                              payload=payload)
+
+        self.logger.debug("Override fan RPM alarm start time")
+
+        # Send message
+        received_message = self.can_interface.send(message)
+
+        # If there is no content...
+        if received_message is not None:
+
+            self.logger.debug("Set RPM alarm start time to: " +
+                        str(received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]))
+            # response payload is OK or not OK
+            return received_message['message'][DenaliMessage.PAYLOAD_START_INDEX]
+        else:
+            self.logger.debug("Timeout!!!!")
+            return False
Index: tests/dg_heat_and_chemical_disinfect_test.py
===================================================================
diff -u -r7cf2a8a92fdaaa457abf49e07a211ccf06131f12 -ra0355d7ec27c00104dac97aadb2b76f69c89ce36
--- tests/dg_heat_and_chemical_disinfect_test.py	(.../dg_heat_and_chemical_disinfect_test.py)	(revision 7cf2a8a92fdaaa457abf49e07a211ccf06131f12)
+++ tests/dg_heat_and_chemical_disinfect_test.py	(.../dg_heat_and_chemical_disinfect_test.py)	(revision a0355d7ec27c00104dac97aadb2b76f69c89ce36)
@@ -629,13 +629,17 @@
 
     # cmd_test_heaters()
 
-    collect_treatment_data()
+    #collect_treatment_data()
 
     # collect_hd_treatment()
 
+    #hd.fans.cmd_fans_rpm_alarm_start_time_override(24, 59, reset=1)
+    #hd.fans.cmd_fans_rpm_override(0, 1382.80, reset=0)
+    #dg.fans.cmd_fans_rpm_override(2, 5000)
 
 
 
 
 
 
+