Index: firmware/App/Services/PIControllers.c
===================================================================
diff -u -r29a9a5dbaf87d4ae86612c7ca8c27716f20d6381 -r342b6c3de2a79fe5945d0b69aeaf9c3f46df1d8f
--- firmware/App/Services/PIControllers.c	(.../PIControllers.c)	(revision 29a9a5dbaf87d4ae86612c7ca8c27716f20d6381)
+++ firmware/App/Services/PIControllers.c	(.../PIControllers.c)	(revision 342b6c3de2a79fe5945d0b69aeaf9c3f46df1d8f)
@@ -60,8 +60,8 @@
 
 /// PI Controllers - initial configurations.
 static PI_CONTROLLER_T piControllers[ NUM_OF_PI_CONTROLLERS_IDS ] =
-{   // Kp   Ki  uMax  uMin  ref meas  err  esw esum ctrl Ilimit  controller type
-    { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.1,  CONTROLLER_UNIDIRECTIONAL },  // PI_CONTROLLER_ID_RO_PUMP
+{   // Kp   Ki  uMax  uMin  ref meas err  esw esum ctrl Ilimit  controller type
+    { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.5,  CONTROLLER_UNIDIRECTIONAL },  // PI_CONTROLLER_ID_RO_PUMP
     { 0.0, 0.0, 3000, 300, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 10.0, CONTROLLER_BIDIRECTIONAL },   // PI_CONTROLLER_ID_DRAIN_PUMP
     { 0.0, 0.0, 1.0,  0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.1,  CONTROLLER_UNIDIRECTIONAL },  // PI_CONTROLLER_ID_RO_PUMP_MAX_PRES
 };
@@ -166,7 +166,7 @@
         // Calculate error signal
         if ( controller->direction == CONTROLLER_UNIDIRECTIONAL )
         {
-            // To make sure that the outcome will be positive
+            // Control should always be positive
             controller->errorSignal = fabs( referenceSignal ) - ( referenceSignal < 0.0 ? ( measuredSignal * -1.0 ) : measuredSignal );
         }
         else