Index: firmware/App/Modes/ModeTreatment.c
===================================================================
diff -u -r28b7042e4ec84be96d53795688530e348bdc6fb1 -r03ca1896138e7ec112b949cfa0195eb6eb31335b
--- firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision 28b7042e4ec84be96d53795688530e348bdc6fb1)
+++ firmware/App/Modes/ModeTreatment.c	(.../ModeTreatment.c)	(revision 03ca1896138e7ec112b949cfa0195eb6eb31335b)
@@ -1044,7 +1044,8 @@
         }
         else
         {
-            if ( treatmentTime > getU32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_TREATMENT_DURATION ) )
+            if ( ( treatmentTime < getU32TreatmentParamLowerRangeLimit( TREATMENT_PARAM_TREATMENT_DURATION ) ) ||
+                 ( treatmentTime > getU32TreatmentParamUpperRangeLimit( TREATMENT_PARAM_TREATMENT_DURATION ) ) )
             {
                 rejectReason = REQUEST_REJECT_REASON_TREATMENT_TIME_OUT_OF_RANGE;
             }