Index: firmware/App/Modes/ModePreTreat.c
===================================================================
diff -u -rfee71ca73745dad573b28acd13b66624cceeabc0 -r8e2cfecc47bb3912078b29513f1717c1567f0071
--- firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision fee71ca73745dad573b28acd13b66624cceeabc0)
+++ firmware/App/Modes/ModePreTreat.c	(.../ModePreTreat.c)	(revision 8e2cfecc47bb3912078b29513f1717c1567f0071)
@@ -166,25 +166,32 @@
  *************************************************************************/
 void signalAlarmActionToPreTreatmentMode( ALARM_ACTION_T action )
 {
-    switch( action )
+    if ( HD_PRE_TREATMENT_PRIME_STATE == currentPreTreatmentState )
     {
-        case ALARM_ACTION_STOP:
-            break;
+        signalAlarmActionToPrimeMode( action );
+    }
+    else
+    {
+        switch( action )
+        {
+            case ALARM_ACTION_STOP:
+                break;
 
-        case ALARM_ACTION_RESUME:
-            break;
+            case ALARM_ACTION_RESUME:
+                break;
 
-        case ALARM_ACTION_END_TREATMENT:
-            requestNewOperationMode( MODE_POST );
-            break;
+            case ALARM_ACTION_END_TREATMENT:
+                requestNewOperationMode( MODE_POST );
+                break;
 
-        case ALARM_ACTION_ACK:
-            // Nothing to be done here
-            break;
+            case ALARM_ACTION_ACK:
+                // Nothing to be done here
+                break;
 
-        default:
-            // Ignore
-            break;
+            default:
+                // Ignore
+                break;
+        }
     }
 }