Index: firmware/App/Modes/BloodPrime.c
===================================================================
diff -u -r9d924ec76ce770eb2a94088bfe37bfb0e30981a8 -r41eaf78372c0ee2a79b38d0a06bd3f02d54baed4
--- firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 9d924ec76ce770eb2a94088bfe37bfb0e30981a8)
+++ firmware/App/Modes/BloodPrime.c	(.../BloodPrime.c)	(revision 41eaf78372c0ee2a79b38d0a06bd3f02d54baed4)
@@ -37,7 +37,6 @@
 // ********** private definitiions ***********
 
 #define TUBING_BLOOD_PRIME_VOLUME_ML                80.0F                   ///< Target blood prime volume to prime the blood side circuit (in mL).
-#define MAX_BLOOD_PRIME_VOLUME_ERROR_ML             60.0F                   ///< Maximum error in total additional blood prime volume (20% of total).
 #define MIN_RAMP_TIME_SEC                           60                      ///< Minimum ramp time for blood prime (in seconds).
 
 /// Initial flow rate for blood pump when starting blood prime operation.
@@ -66,7 +65,6 @@
 static OVERRIDE_U32_T bloodPrimePublishInterval = { BLOOD_PRIME_DATA_PUBLISH_INTERVAL, BLOOD_PRIME_DATA_PUBLISH_INTERVAL, BLOOD_PRIME_DATA_PUBLISH_INTERVAL, 0 };
 
 static OVERRIDE_F32_T  cumulativeBloodPrimeVolume_mL = { 0.0, 0.0, 0.0, 0 };    ///< Total cumulative blood prime volume (in mL) from measured blood flow rate.
-static F32 expectedBloodPrimeVolume_mL = 0.0;                                   ///< Total cumulative blood prime volume (in mL) expected based on target blood flow rate.
 
 // ********** private function prototypes **********
 
@@ -92,7 +90,6 @@
     bloodPrimeRampControlTimerCtr = 0;
     bloodPrimePublishTimerCtr = BLOOD_PRIME_DATA_PUBLISH_INTERVAL - 2;  // setup so publish will occur time after next
     cumulativeBloodPrimeVolume_mL.data = 0.0;
-    expectedBloodPrimeVolume_mL = 0.0;
     resetBloodPrimeFlags();
 
     bloodPrimeTargetVolume_mL = (F32)TUBING_BLOOD_PRIME_VOLUME_ML + (F32)getDialyzerBloodVolume();
@@ -226,7 +223,6 @@
 
     // Update blood prime volume delivered so far
     cumulativeBloodPrimeVolume_mL.data += ( getMeasuredBloodFlowRate() * BLOOD_PRIME_FLOW_INTEGRATOR );
-    expectedBloodPrimeVolume_mL        += ( (F32)getTargetBloodFlowRate() * BLOOD_PRIME_FLOW_INTEGRATOR );
 
     // Has blood prime completed?
     if ( getBloodPrimeVolume() >= bloodPrimeTargetVolume_mL )
@@ -237,16 +233,6 @@
         signalBloodPrimeToDialysis();   // Signal treatment mode that it's time to start dialysis
         cmdStopDGTrimmerHeater();       // Stop trimmer heater - dialysis sub-mode will restart as appropriate
     }
-    // Is blood prime taking too long based on set BP rate?
-    else if ( fabs( expectedBloodPrimeVolume_mL - getBloodPrimeVolume() ) > MAX_BLOOD_PRIME_VOLUME_ERROR_ML )
-    {
-#ifndef _RELEASE_
-        if ( getSoftwareConfigStatus( SW_CONFIG_DISABLE_PUMP_FLOW_CHECKS ) != SW_CONFIG_ENABLE_VALUE )
-#endif
-        {
-            activateAlarmNoData( ALARM_ID_BLOOD_PRIME_VOLUME_CHECK_FAILURE );
-        }
-    }
     else
     {
         // ramp blood pump on ramp interval