Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -raa7b1f5f68aae23c1c52b32658fcb625c29accfb -r6a8d904f4316ed9d9f2f14f99afde63bef38eace
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision aa7b1f5f68aae23c1c52b32658fcb625c29accfb)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 6a8d904f4316ed9d9f2f14f99afde63bef38eace)
@@ -1,6 +1,6 @@
 /**************************************************************************
 *
-* Copyright (c) 2020-2022 Diality Inc. - All Rights Reserved.
+* Copyright (c) 2020-2023 Diality Inc. - All Rights Reserved.
 *
 * THIS CODE MAY NOT BE COPIED OR REPRODUCED IN ANY FORM, IN PART OR IN
 * WHOLE, WITHOUT THE EXPLICIT PERMISSION OF THE COPYRIGHT OWNER.
@@ -15,7 +15,8 @@
 *
 ***************************************************************************/
 
-#include "PresOccl.h"
+#include "PresOccl.h"
+#include "AirPump.h"
 #include "AlarmMgmt.h"
 #include "FPGA.h"
 #include "ModeTreatmentParams.h"
@@ -50,6 +51,7 @@
 #define VENOUS_PRESSURE_MIN_PSI             ( -30.0F )                                      ///< Minimum of scale for venous pressure sensor reading (in PSI).
 #define VENOUS_PRESSURE_MAX_PSI             ( 30.0F )                                       ///< Maximum of scale for venous pressure sensor reading (in PSI).
 #define MIN_VENOUS_PRESSURE_FOR_RAMP_MMHG   ( 0.0F )                                        ///< Minimum venous pressure during blood pump ramp up (in mmHg).
+#define VENOUS_OFFSET_WITH_AIRPUMP_MMHG     ( 150.0F )                                      ///< Value to increase venous pressure high limit alarm when air pump is operating.
 
 #define ARTERIAL_PRESSURE_OFFSET            ( 1638 )                                        ///< Offset for 14-bit arterial pressure sensor reading.
 #define ARTERIAL_PRESSURE_SCALE             ( 14745 - VENOUS_PRESSURE_OFFSET )              ///< Scale for arterial pressure sensor.
@@ -94,7 +96,8 @@
 static const U32 EMPTY_SALINE_BAG_PERSISTENCE = ( 250 / TASK_GENERAL_INTERVAL );            ///< Time that saline bag looks empty before saying it is empty.
 
 #define PRES_ALARM_PERSISTENCE              ( 1 * MS_PER_SECOND )                           ///< Alarm persistence period for pressure alarms.
-#define VEN_OCCL_ALARM_PERSISTENCE          100                                             ///< Alarm persistence period for venous occlusion alarm.
+#define VEN_OCCL_ALARM_PERSISTENCE          100                                             ///< Alarm persistence period for venous occlusion alarm.
+#define AIR_PUMP_TOLERANCE_TIMEOUT_MS       (1 * MS_PER_SECOND )                            ///< Time to allow increased maximum venous high limit
 
 /// Measured arterial pressure is filtered w/ 10 second moving average for pressure compensation of flow.
 #define SIZE_OF_LONG_ART_ROLLING_AVG        ( ( MS_PER_SECOND / TASK_GENERAL_INTERVAL ) * 10 )
@@ -142,6 +145,8 @@
 static F32 shortFilteredArterialPressure;                                       ///< Measured arterial pressure after short (1 s) filter.
 static F32 shortFilteredVenousPressure;                                         ///< Measured venous pressure after short (1 s) filter.
 
+static U32 airPumpOpenToleranceTimer;                                           ///< Timer for increased maximum venous high limit.
+
 static U32 bloodPumpOcclusionAfterCartridgeInstall;                             ///< Measured blood pump occlusion reading taken after cartridge install.
 
 static U32 emptySalineBagCtr = 0;                                               ///< Timer counter for empty bag detection.
@@ -220,6 +225,7 @@
     presOcclDataPublicationTimerCounter = DATA_PUBLISH_COUNTER_START_COUNT;
     presOcclState                       = PRESSURE_WAIT_FOR_POST_STATE;
     presOcclPostState                   = PRESSURE_SELF_TEST_STATE_START;
+    airPumpOpenToleranceTimer           = 0;
 
 #ifndef _RELEASE_
     if ( getSoftwareConfigStatus( SW_CONFIG_DISABLE_PRESSURE_CHECKS ) != SW_CONFIG_ENABLE_VALUE )