Index: firmware/App/Drivers/GLXferPump.c
===================================================================
diff -u -r3074682de43568567f244e2663d1f75b7e6ea85e -ra4774f170562e33a48238cb3e3137bdd06ac374a
--- firmware/App/Drivers/GLXferPump.c	(.../GLXferPump.c)	(revision 3074682de43568567f244e2663d1f75b7e6ea85e)
+++ firmware/App/Drivers/GLXferPump.c	(.../GLXferPump.c)	(revision a4774f170562e33a48238cb3e3137bdd06ac374a)
@@ -15,6 +15,8 @@
 *
 ***************************************************************************/
 
+#include <math.h>
+
 #include "AlarmMgmtTD.h"
 #include "FpgaTD.h"
 #include "GLXferPump.h"
@@ -29,7 +31,6 @@
 // ********** private definitions **********
 
 #define AIR_PUMP_PWM_TIME           20                ///< Time (in 10ns increments) per PWM register count for the air pump = 20 kHz.
-#define AIR_PUMP_MAX_PWM            255               ///< Air pump maximum PWM.
 
 // ********** private data **********
 
@@ -104,20 +105,20 @@
 /*********************************************************************//**
  * @brief
  * The PercentageToScalar function convert percentage 0-100% duty
- * cycle to 0-255 scalar value.
+ * cycle to 0-250 scalar value.
  * @details \b Inputs: none
  * @details \b Outputs: none
- * @param percentage Power level for air pump (0...2=off, 3-100.0 for ON).
- * @return U08 8-bit PWM value (0-255)
+ * @param percentage Power level for air pump (0=off, 1-100.0 for ON).
+ * @return U08 8-bit PWM value (0-250)
  *************************************************************************/
 static U08 convertPercentageToScalar( F32 percentage )
 {
     F32 power;
     // Clamp input to 0-100%
     power = RANGE( percentage, AIR_PUMP_DUTY_CYCLE_MIN, AIR_PUMP_DUTY_CYCLE_MAX );
 
-    // Calculate 0-255 value (255 * power / 100)
-    return (U08)( ( ( power * AIR_PUMP_MAX_PWM ) / FRACTION_TO_PERCENT_FACTOR ) );
+    // Calculate 0-250 value (250 * power / 100)
+    return (U08)( ceilf ( ( ( power * (F32)AIR_PUMP_MAX_PWM ) / FRACTION_TO_PERCENT_FACTOR ) ) );
 }