Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -r714e5bc990074b9b73a46af011bf7204f0d5d5e1 -rf237976ac5eb469200dfd547252720e6ea7211c4
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 714e5bc990074b9b73a46af011bf7204f0d5d5e1)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision f237976ac5eb469200dfd547252720e6ea7211c4)
@@ -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.
@@ -95,7 +97,8 @@
 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 )
@@ -143,6 +146,8 @@
 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.
@@ -221,6 +226,7 @@
     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 )
@@ -564,6 +570,34 @@
                 venHighLimit = (F32)getS32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT );
             }
 
+#ifndef _RELEASE_
+            if ( SW_CONFIG_DISABLE_VALUE == getSoftwareConfigStatus( SW_CONFIG_DISABLE_AIR_PUMP ) )
+#endif
+            {
+
+                if ( AIR_PUMP_STATE_ON == getAirPumpState() )
+                {
+                    venHighLimit = (F32)getS32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT ) + VENOUS_OFFSET_WITH_AIRPUMP_MMHG;
+                    airPumpOpenToleranceTimer = getMSTimerCount();
+                }
+
+                else // air pump is off.
+                {
+
+                    if ( airPumpOpenToleranceTimer > 0 )
+                    {
+                        venHighLimit = (F32)getS32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT ) + VENOUS_OFFSET_WITH_AIRPUMP_MMHG;
+
+                        if ( TRUE == didTimeout( airPumpOpenToleranceTimer, AIR_PUMP_TOLERANCE_TIMEOUT_MS ) )
+                        {
+                            venHighLimit = (F32)getS32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT );
+                            airPumpOpenToleranceTimer = 0;
+                        }
+                    }
+
+                }
+            }
+
             // Cannot monitor for low venous pressure while venting air trap
             if ( getValveAirTrapStatus() != STATE_OPEN )
             {