Index: firmware/App/Controllers/PresOccl.c
===================================================================
diff -u -r38a89cb53b4ed2e467f51d41e30d43010fdd23e3 -r1c628bfd5d6414b74b8cbd083f66839888a8236b
--- firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 38a89cb53b4ed2e467f51d41e30d43010fdd23e3)
+++ firmware/App/Controllers/PresOccl.c	(.../PresOccl.c)	(revision 1c628bfd5d6414b74b8cbd083f66839888a8236b)
@@ -118,20 +118,24 @@
 static F32 shortFilteredArterialPressure;                                       ///< Measured arterial pressure after short (1 s) filter.
 static F32 shortFilteredVenousPressure;                                         ///< Measured venous pressure after short (1 s) filter.
 
+#ifndef DISABLE_PRESSURE_CHECKS
 static U32 bloodPumpOcclusionAfterCartridgeInstall;                             ///< Measured blood pump occlusion reading taken after cartridge install.
 static U32 dialInPumpOcclusionAfterCartridgeInstall;                            ///< Measured dialysate inlet pump occlusion reading taken after cartridge install.
 static U32 dialOutPumpOcclusionAfterCartridgeInstall;                           ///< Measured dialysate outlet pump occlusion reading taken after cartridge install.
+#endif
 
 static U32 emptySalineBagCtr = 0;                                               ///< Timer counter for empty bag detection.
 
 static U08 lastArterialPressureReadCtr;                                         ///< Previous arterial pressure sensor read count.
 static U08 lastVenousPressureReadCtr;                                           ///< Previous venous pressure sensor read count.
+#ifndef DISABLE_PRESSURE_CHECKS
 static U08 lastBPOcclReadCtr;                                                   ///< Previous BP occlusion sensor read count.
 static U08 lastDPiOcclReadCtr;                                                  ///< Previous DPi occlusion sensor read count.
 static U08 lastDPoOcclReadCtr;                                                  ///< Previous DPo occlusion sensor read count.
 static U08 lastBPErrorCtr;                                                      ///< Previous BP error count.
 static U08 lastDPIErrorCtr;                                                     ///< Previous DPi error count.
 static U08 lastDPOErrorCtr;                                                     ///< Previous DPo error count.
+#endif
 
 static F32 artPressureReadingsLong[ SIZE_OF_LONG_ART_ROLLING_AVG ];             ///< Holds flow samples for long arterial pressure rolling average.
 static U32 artPressureReadingsLongIdx = 0;                                      ///< Index for next sample in rolling average array.
@@ -190,20 +194,24 @@
 
     lastArterialPressureReadCtr = 0;
     lastVenousPressureReadCtr = 0;
+#ifndef DISABLE_PRESSURE_CHECKS
     lastBPOcclReadCtr = 0;
     lastDPiOcclReadCtr = 0;
     lastDPoOcclReadCtr = 0;
     lastBPErrorCtr = 0;
     lastDPIErrorCtr = 0;
     lastDPOErrorCtr = 0;
+#endif
 
     longFilteredArterialPressure = 0.0;
     shortFilteredArterialPressure = 0.0;
     shortFilteredVenousPressure = 0.0;
 
+#ifndef DISABLE_PRESSURE_CHECKS
     bloodPumpOcclusionAfterCartridgeInstall = 0;
     dialInPumpOcclusionAfterCartridgeInstall = 0;
     dialOutPumpOcclusionAfterCartridgeInstall = 0;
+#endif
 }
 
 /*********************************************************************//**
@@ -287,9 +295,11 @@
  *************************************************************************/
 void setOcclusionInstallLevels( void )
 {
+#ifndef DISABLE_PRESSURE_CHECKS
     bloodPumpOcclusionAfterCartridgeInstall = getMeasuredBloodPumpOcclusion();
     dialInPumpOcclusionAfterCartridgeInstall = getMeasuredDialInPumpOcclusion();
     dialOutPumpOcclusionAfterCartridgeInstall = getMeasuredDialOutPumpOcclusion();
+#endif
 }
 
 /*********************************************************************//**
@@ -478,13 +488,15 @@
     dialInPumpOcclusion.data = (U32)getFPGADialInPumpOcclusion();
     dialOutPumpOcclusion.data = (U32)getFPGADialOutPumpOcclusion();
 
+#ifndef DISABLE_PRESSURE_CHECKS
     // Record occlusion read and error counters for next time around
     lastBPOcclReadCtr  = bpReadCtr;
     lastDPiOcclReadCtr = dpiReadCtr;
     lastDPoOcclReadCtr = dpoReadCtr;
     lastBPErrorCtr = bpErrorCtr;
     lastDPIErrorCtr = dpiErrorCtr;
     lastDPOErrorCtr = dpoErrorCtr;
+#endif
 }
 
 /*********************************************************************//**