Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -r736cc5b56cc9c784ab1d8fc8687a73d190c35759 -r28e7d73ed933961eaa28f901199e34f7cca232ac
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 736cc5b56cc9c784ab1d8fc8687a73d190c35759)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 28e7d73ed933961eaa28f901199e34f7cca232ac)
@@ -723,11 +723,18 @@
     // If treatment start is requested by user, initiate treatment workflow (transition to treatment params mode).
     if ( TRUE == treatStartReqReceived )
     {
+        PRESSURE_LIMIT_CHANGE_RESPONSE_T respRecord = { TRUE, REQUEST_REJECT_REASON_NONE, 0, 0, 0 };
+
         // Initialize treatment modes before starting a new treatment
         initTreatParamsMode();
         initPreTreatmentMode();
         initTreatmentMode();
         initPostTreatmentMode();
+        // Send UI default pressure settings since user is not asked to set them.
+        respRecord.artPresLimitWindowmmHg     = getTreatmentParameterS32( TREATMENT_PARAM_ART_PRES_LIMIT_WINDOW );
+        respRecord.venPresLimitWindowmmHg     = getTreatmentParameterS32( TREATMENT_PARAM_VEN_PRES_LIMIT_WINDOW );
+        respRecord.venPresLimitAsymmetricmmHg = getTreatmentParameterS32( TREATMENT_PARAM_VEN_PRES_LIMIT_ASYMMETRIC );
+        sendPressureLimitsChangeResponse( &respRecord );
         // Start treatment workflow with treatment parameters mode
         requestNewOperationMode( MODE_TPAR );
         treatStartReqReceived = FALSE;
Index: firmware/App/Modes/ModeTreatment.c
===================================================================
diff -u -r736cc5b56cc9c784ab1d8fc8687a73d190c35759 -r28e7d73ed933961eaa28f901199e34f7cca232ac
--- firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision 736cc5b56cc9c784ab1d8fc8687a73d190c35759)
+++ firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision 28e7d73ed933961eaa28f901199e34f7cca232ac)
@@ -1346,7 +1346,7 @@
     CRITICAL_DATAS_T proposedNewArtLimitWindow;
     CRITICAL_DATAS_T proposedNewVenLimitWindow;
     CRITICAL_DATAS_T proposedNewVenLimitAsymmetric;
-    PRESSURE_LIMIT_CHANGE_RESPONSE_T respRecord = { FALSE, 0, 0, 0 };
+    PRESSURE_LIMIT_CHANGE_RESPONSE_T respRecord = { FALSE, 0, 0, 0, 0 };
 
     proposedNewArtLimitWindow.sInt     = data->artPresLimitWindowmmHg;
     proposedNewVenLimitWindow.sInt     = data->venPresLimitWindowmmHg;
Index: firmware/App/Modes/ModeTreatmentParams.h
===================================================================
diff -u -r736cc5b56cc9c784ab1d8fc8687a73d190c35759 -r28e7d73ed933961eaa28f901199e34f7cca232ac
--- firmware/App/Modes/ModeTreatmentParams.h	(.../ModeTreatmentParams.h)	(revision 736cc5b56cc9c784ab1d8fc8687a73d190c35759)
+++ firmware/App/Modes/ModeTreatmentParams.h	(.../ModeTreatmentParams.h)	(revision 28e7d73ed933961eaa28f901199e34f7cca232ac)
@@ -109,7 +109,7 @@
 F32  getUltrafiltrationRateOriginal( void );                                        // Get/calculate the original ultrafiltration rate, by ultrafiltration volume and treatment duration set in pre-treatment mode by user.
 
 BOOL testSetTreatmentParameter( TREATMENT_PARAM_T param, CRITICAL_DATAS_T value );  // Set a specific treatment parameter value
-BOOL testSendCurrentTreatmentParameters();                                        // Update current treatment parameters
+BOOL testSendCurrentTreatmentParameters();                                          // Update current treatment parameters
 
 /**@}*/