Index: firmware/App/Modes/ModeFill.c
===================================================================
diff -u -rc940dea020a10f2bab23ae92aa6932c375c26dd4 -r7e1358a440116fedad5a049d49c2d6f9be85d60e
--- firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision c940dea020a10f2bab23ae92aa6932c375c26dd4)
+++ firmware/App/Modes/ModeFill.c	(.../ModeFill.c)	(revision 7e1358a440116fedad5a049d49c2d6f9be85d60e)
@@ -972,7 +972,7 @@
         {
             // SRSDG 400
             if ( ( FALSE == isValueWithinPercentRange( avgBicarbConductivity, bicarbNormalConductivity, FIVE_PERCENT_FACTOR ) ) &&
-                 ( getTestConfigStatus( TEST_CONFIG_MIX_WITH_WATER ) != TRUE ) )
+                 ( getTestConfigStatus( TEST_CONFIG_MIX_WITH_WATER ) != TRUE ) && ( getTargetFillVolumeML() > MIN_FILL_TARGET_TO_CHECK_RO_AND_CPO_ML ) )
             {
                 setBadAvgConductivityDetectedFlag( TRUE );          // signal idle bad avg conductivity detected
                 setThisFisrtFillFlag( TRUE );
@@ -982,7 +982,7 @@
             }
 
             if ( ( FALSE == isValueWithinPercentRange( avgAcidConductivity, acidNormalConductivity, FIVE_PERCENT_FACTOR ) ) &&
-                 ( getTestConfigStatus( TEST_CONFIG_MIX_WITH_WATER ) != TRUE ) )
+                 ( getTestConfigStatus( TEST_CONFIG_MIX_WITH_WATER ) != TRUE ) && ( getTargetFillVolumeML() > MIN_FILL_TARGET_TO_CHECK_RO_AND_CPO_ML ) )
             {
                 setBadAvgConductivityDetectedFlag( TRUE );          // signal idle bad avg conductivity detected
                 setThisFisrtFillFlag( TRUE );