Index: firmware/App/Controllers/AirTrap.c
===================================================================
diff -u -r7f3bf72c038de385e8a0d743990069c039e13ba0 -r80a7440462a8f87ee11ed62371baba2d87bb6d89
--- firmware/App/Controllers/AirTrap.c	(.../AirTrap.c)	(revision 7f3bf72c038de385e8a0d743990069c039e13ba0)
+++ firmware/App/Controllers/AirTrap.c	(.../AirTrap.c)	(revision 80a7440462a8f87ee11ed62371baba2d87bb6d89)
@@ -7,8 +7,8 @@
 *
 * @file    AirTrap.c
 *
-* @author  (last)      Sameer Kalliadan Poyil
-* @date    (last)      23-Mar-2026
+* @author  (last)      Varshini Nagabooshanam
+* @date    (last)      18-Jun-2026
 *
 * @author  (original)  Sean Nash
 * @date    (original)  24-Oct-2024
@@ -47,6 +47,9 @@
 #define AIR_TRAP_ILLEGAL_LEVELS_TIMEOUT_MS    ( 2 * MS_PER_SECOND )                               ///< Air trap illegal values timeout (in ms)
 #define DATA_PUBLISH_COUNTER_START_COUNT      7                                                   ///< Data publish counter start count.
 
+#define AIR_TRAP_REPEATED_LOWER_EVENT_LIMIT   5                                                   ///< Air trap repeated lower event limit
+#define AIR_TRAP_REPEATED_LOWER_EVENTS_TIMEOUT_MS    ( 300 * MS_PER_SECOND )                      ///< Air trap repeated lower events timeout period (in ms). Maximum 5 air trap lower events are allowed within 5 minutes.
+
 /// Air pump on delay after fill adjustment
 static const U32 AIR_PUMP_ON_DELAY_ADJUST_AFTER_FILL = ( AIR_PUMP_ON_DELAY_TIME_MS - ( 1 * MS_PER_SECOND ) );
 
@@ -82,7 +85,7 @@
 static OVERRIDE_F32_T airTrapAirPumpRaisePowerLevel;                                              ///< Air pump power level to use when raising the air trap blood level.
 static OVERRIDE_F32_T airTrapAirPumpLowerPowerLevel;                                              ///< Air pump power level to use when lowering the air trap blood level.
 
-static BOOL pendingStartAirTrapController;                                                        ///< Flag indicates an air trap controller start request is pending.
+static BOOL pendingStartAirTrapController;                                                        ///< Indicates an air trap controller start request is pending.
 static BOOL pendingStopAirTrapController;                                                         ///< Flag indicates an air trap controller stop request is pending.
 
 static U32  airTrapFillStartTime;                                                                 ///< Air trap fill (raise level) operation start time.
@@ -93,6 +96,9 @@
 
 static BOOL airTrapHasDetectedFaultMode;                                                          ///< Flag indicates air trap unit has handled transition to fault mode.
 
+static U32 airTrapLowerEventCount;                                                                ///< Air trap lower event count
+static U32 airTrapLowerEventStartTime;                                                            ///< Air trap lower event start time
+
 // ********** private function prototypes **********
 
 static AIR_TRAP_STATE_T handleAirTrapManualControlState( void );
@@ -139,6 +145,8 @@
     airTrapLowerDelayStartTime               = 0;
     airTrapLowerStartTime                    = 0;
     airTrapHasDetectedFaultMode              = FALSE;
+    airTrapLowerEventCount                   = 0;
+    airTrapLowerEventStartTime               = 0;
 }
 
 /*********************************************************************//**
@@ -249,10 +257,12 @@
  * @brief
  * The execAirTrapMonitorTreatment function executes the air trap monitor
  * for treatment mode.
- * @details \b Alarm: ALARM_ID_TD_AIR_TRAP_FILL_DURING_TREATMENT if air trap
+ * @details \b Alarm: ALARM_ID_TD_REPEATED_AIR_TRAP_LOWER_EVENTS,
+ * ALARM_ID_TD_AIR_TRAP_FILL_DURING_TREATMENT,  if air trap
  * fill exceeds maximum allowed time to complete.
- * @details \b Inputs: airTrapControllerState, fillStartTime
- * @details \b Outputs: none
+ * @details \b Inputs: airTrapControllerState, fillStartTime,
+ * airTrapLowerEventCount, airTrapLowerEventStartTime
+ * @details \b Outputs: airTrapLowerEventCount, airTrapLowerEventStartTime
  * @return none
  *************************************************************************/
 void execAirTrapMonitorTreatment( void )
@@ -282,6 +292,17 @@
             }
         }
     }
+    // Check repeated air trap lower events alarm
+    if ( ( airTrapLowerEventCount >= AIR_TRAP_REPEATED_LOWER_EVENT_LIMIT ) &&
+         ( FALSE == didTimeout( airTrapLowerEventStartTime, AIR_TRAP_REPEATED_LOWER_EVENTS_TIMEOUT_MS ) ) )
+    {
+        SET_ALARM_WITH_2_U32_DATA( ALARM_ID_TD_REPEATED_AIR_TRAP_LOWER_EVENTS, airTrapLowerEventCount, 0 )
+    }
+    else if ( TRUE == didTimeout( airTrapLowerEventStartTime, AIR_TRAP_REPEATED_LOWER_EVENTS_TIMEOUT_MS ) )
+    {
+        airTrapLowerEventCount = 0;
+        airTrapLowerEventStartTime = 0;
+    }
 }
 
 /*********************************************************************//**
@@ -385,8 +406,8 @@
  * The handleAirTrapClosedState function handles the closed state of the
  * air trap.
  * @details \b Message \b Sent: MSG_ID_TD_EVENT if starting a level change.
- * @details \b Inputs: pendingStopAirTrapController
- * @details \b Outputs: none
+ * @details \b Inputs: pendingStopAirTrapController, airTrapLowerEventCount
+ * @details \b Outputs: airTrapLowerEventStartTime, airTrapLowerEventCount
  * @return next state
  *************************************************************************/
 static AIR_TRAP_STATE_T handleAirTrapClosedState( void )
@@ -423,6 +444,12 @@
 
             SEND_EVENT_WITH_2_U32_DATA( TD_EVENT_AIR_TRAP_LOWER, ON, 0 );
 
+            if ( 0 == airTrapLowerEventCount )
+            {
+               airTrapLowerEventStartTime = getMSTimerCount();
+            }
+            airTrapLowerEventCount++;
+
             result = AIR_TRAP_LOWER_LEVEL_STATE;
         }
     }