Index: firmware/App/Modes/ModeStandby.c
===================================================================
diff -u -rdb291cc22fd8f10e6e47cad468e14ed5590a94f2 -r2ecb56b85ad0b84997fec9e5aa5af7a9cea6e990
--- firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision db291cc22fd8f10e6e47cad468e14ed5590a94f2)
+++ firmware/App/Modes/ModeStandby.c	(.../ModeStandby.c)	(revision 2ecb56b85ad0b84997fec9e5aa5af7a9cea6e990)
@@ -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     = getTreatmentParameterS32DefaultValue( TREATMENT_PARAM_ART_PRES_LIMIT_WINDOW );
+        respRecord.venPresLimitWindowmmHg     = getTreatmentParameterS32DefaultValue( TREATMENT_PARAM_VEN_PRES_LIMIT_WINDOW );
+        respRecord.venPresLimitAsymmetricmmHg = getTreatmentParameterS32DefaultValue( TREATMENT_PARAM_VEN_PRES_LIMIT_ASYMMETRIC );
+        sendPressureLimitsChangeResponse( &respRecord );
         // Start treatment workflow with treatment parameters mode
         requestNewOperationMode( MODE_TPAR );
         treatStartReqReceived = FALSE;