Index: firmware/App/Modes/ModeGenIdle.c
===================================================================
diff -u -r42128f305793acaf5f4387ec1825281911d62bff -r99378e25b47c3f8427b591c1ce61b5adcd5a0211
--- firmware/App/Modes/ModeGenIdle.c	(.../ModeGenIdle.c)	(revision 42128f305793acaf5f4387ec1825281911d62bff)
+++ firmware/App/Modes/ModeGenIdle.c	(.../ModeGenIdle.c)	(revision 99378e25b47c3f8427b591c1ce61b5adcd5a0211)
@@ -304,7 +304,10 @@
     DG_GEN_IDLE_MODE_STATE_T result = DG_GEN_IDLE_MODE_STATE_FLUSH_WATER;
     DG_RESERVOIR_ID_T currentInactiveReservoir = getInactiveReservoir();
     F32 reservoirWeight = getReservoirWeight( currentInactiveReservoir );
+    HD_MODE_SUB_MODE_T mode;
 
+    getHDOperationMode( &mode );
+
     if ( ( TRUE == isAlarmActive( ALARM_ID_DG_ACID_BOTTLE_LOW_VOLUME ) ) || ( TRUE == isAlarmActive( ALARM_ID_DG_BICARB_BOTTLE_LOW_VOLUME ) ) )
     {
         // The empty bottle alarms are active set the empty bottle alarm to TRUE.
@@ -326,8 +329,8 @@
         initialReservoirWeight = getReservoirWeight( inactiveReservoir );
     }
 
-    // Check for unwanted filling
-    if ( reservoirWeight > ( initialReservoirWeight +  MAX_IDLE_RSVR_WEIGHT_GAIN_ML ) )
+    // Check for unwanted filling in treatment mode
+    if ( ( MODE_TREA == mode.hdMode) && ( reservoirWeight > ( initialReservoirWeight +  MAX_IDLE_RSVR_WEIGHT_GAIN_ML ) ) )
     {
         SET_ALARM_WITH_2_U32_DATA( ALARM_ID_DG_INACTIVE_RESERVOIR_WEIGHT_OUT_OF_RANGE, initialReservoirWeight, reservoirWeight );
     }