Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -re4cc37257141c5227186ac6d8ca3d6c87d009042 -ref4eed270f61b2fe2eca37b5c253b33f11629c12
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision e4cc37257141c5227186ac6d8ca3d6c87d009042)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision ef4eed270f61b2fe2eca37b5c253b33f11629c12)
@@ -581,13 +581,17 @@
 
 #ifndef DISABLE_PRESSURE_CHECKS
         // Cannot monitor for low venous pressure while venting air trap
-        if ( STATE_OPEN == getValveAirTrapStatus() )
+        if ( getValveAirTrapStatus() != STATE_OPEN )
         {
             if ( TRUE == isPersistentAlarmTriggered( ALARM_ID_VENOUS_PRESSURE_LOW, venPres < venLowLimit ) )
             {
                 SET_ALARM_WITH_2_F32_DATA( ALARM_ID_VENOUS_PRESSURE_LOW, venPres, venLowLimit );
             }
         }
+        else
+        {   // clear persistence if air trap valve is open
+            isPersistentAlarmTriggered( ALARM_ID_VENOUS_PRESSURE_LOW, FALSE );
+        }
 
         if ( TRUE == isPersistentAlarmConditionCleared( ALARM_ID_VENOUS_PRESSURE_LOW, venPres < venLowLimit ) )
         {
Index: firmware/App/Modes/ModeTreatmentParams.c
===================================================================
diff -u -r8466e63f95f65a3ffb18c3af85ac99328e41167b -ref4eed270f61b2fe2eca37b5c253b33f11629c12
--- firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision 8466e63f95f65a3ffb18c3af85ac99328e41167b)
+++ firmware/App/Modes/ModeTreatmentParams.c	(.../ModeTreatmentParams.c)	(revision ef4eed270f61b2fe2eca37b5c253b33f11629c12)
@@ -64,10 +64,10 @@
     { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=4},    {.uInt=0}    }, // TREATMENT_PARAM_DIALYZER_TYPE
     { CRITICAL_DATA_TYPE_U32, {.uInt=0},    {.uInt=60},   {.uInt=30}   }, // TREATMENT_PARAM_BP_MEAS_INTERVAL
     { CRITICAL_DATA_TYPE_U32, {.uInt=50},   {.uInt=150},  {.uInt=75}   }, // TREATMENT_PARAM_RINSEBACK_FLOW_RATE
-    { CRITICAL_DATA_TYPE_S32, {.sInt=-300}, {.sInt=0},    {.sInt=-300} }, // TREATMENT_PARAM_ART_PRESSURE_LOW_LIMIT
-    { CRITICAL_DATA_TYPE_S32, {.sInt=-300}, {.sInt=0},    {.sInt=0}    }, // TREATMENT_PARAM_ART_PRESSURE_HIGH_LIMIT
-    { CRITICAL_DATA_TYPE_S32, {.sInt=20},   {.sInt=600},  {.sInt=20}   }, // TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT
-    { CRITICAL_DATA_TYPE_S32, {.sInt=20},   {.sInt=600},  {.sInt=400}  }, // TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT
+    { CRITICAL_DATA_TYPE_S32, {.sInt=-300}, {.sInt=-30},  {.sInt=-300} }, // TREATMENT_PARAM_ART_PRESSURE_LOW_LIMIT
+    { CRITICAL_DATA_TYPE_S32, {.sInt=-270}, {.sInt=0},    {.sInt=0}    }, // TREATMENT_PARAM_ART_PRESSURE_HIGH_LIMIT
+    { CRITICAL_DATA_TYPE_S32, {.sInt=20},   {.sInt=570},  {.sInt=20}   }, // TREATMENT_PARAM_VEN_PRESSURE_LOW_LIMIT
+    { CRITICAL_DATA_TYPE_S32, {.sInt=50},   {.sInt=600},  {.sInt=400}  }, // TREATMENT_PARAM_VEN_PRESSURE_HIGH_LIMIT
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=1.0},  {.sFlt=0.0}  }, // TREATMENT_PARAM_HEPARIN_DISPENSE_RATE
     { CRITICAL_DATA_TYPE_F32, {.sFlt=0.0},  {.sFlt=2.0},  {.sFlt=0.0}  }, // TREATMENT_PARAM_HEPARIN_BOLUS_VOLUME
     { CRITICAL_DATA_TYPE_F32, {.sFlt=35.0}, {.sFlt=38.0}, {.sFlt=37.0} }, // TREATMENT_PARAM_DIALYSATE_TEMPERATURE
Index: firmware/App/Modes/Prime.c
===================================================================
diff -u -re4cc37257141c5227186ac6d8ca3d6c87d009042 -ref4eed270f61b2fe2eca37b5c253b33f11629c12
--- firmware/App/Modes/Prime.c	(.../Prime.c)	(revision e4cc37257141c5227186ac6d8ca3d6c87d009042)
+++ firmware/App/Modes/Prime.c	(.../Prime.c)	(revision ef4eed270f61b2fe2eca37b5c253b33f11629c12)
@@ -701,7 +701,7 @@
     if ( TRUE == primeResumeRequested )
     {
         primeResumeRequested = FALSE;
-        primeStartTime += calcTimeSince( primePauseStartTime );
+        primeStartTime += calcTimeSince( primePauseStartTime );  // Adjust prime start time so we don't count pause time in prime duration calculation.
 
         switch ( previousPrimeState )
         {