Index: firmware/App/Controllers/DrainPump.c
===================================================================
diff -u -r22176ce95e49213c48454f34ddf5d29b8109f2cb -r43fdad4b6224c0bf73f3449d174854cf720773ad
--- firmware/App/Controllers/DrainPump.c	(.../DrainPump.c)	(revision 22176ce95e49213c48454f34ddf5d29b8109f2cb)
+++ firmware/App/Controllers/DrainPump.c	(.../DrainPump.c)	(revision 43fdad4b6224c0bf73f3449d174854cf720773ad)
@@ -58,7 +58,7 @@
                                                    FLOAT_TO_INT_ROUNDUP_OFFSET )                                ///< RPM to DAC conversion equation.
 
 #define TOGGLE_PERIOD_RESOLUTION_SECONDS       0.000005F                                                        ///< Toggle period to resolution in seconds.
-#define ROTATIONAL_TO_TOGGLE_PERIOD_CONVERSION 4                                                                ///< Rotational to toggle period conversion coefficient.
+#define ROTATIONAL_TO_TOGGLE_PERIOD_CONVERSION 4.0F                                                             ///< Rotational to toggle period conversion coefficient.
 
 #define DRAIN_PUMP_P_COEFFICIENT               0.5F                                                             ///< P term for drain pump delta pressure control.
 #define DRAIN_PUMP_I_COEFFICIENT               1.0F                                                             ///< I term for drain pump delta pressure control.
@@ -123,7 +123,7 @@
 static DG_DRAIN_PUMP_CAL_RECORD_T drainPumpCalRecord;                                                           ///< Drain pump calibration record.
 
 /// ADC to RPM conversion coefficient or RPM to ADC conversion.
-static const F32 CONVERSION_COEFF = SEC_PER_MIN / ( 2 * TOGGLE_PERIOD_RESOLUTION_SECONDS * ROTATIONAL_TO_TOGGLE_PERIOD_CONVERSION );
+static const F32 CONVERSION_COEFF = (F32) SEC_PER_MIN / ( 2.0F * TOGGLE_PERIOD_RESOLUTION_SECONDS * ROTATIONAL_TO_TOGGLE_PERIOD_CONVERSION );
 
 // ********** private function prototypes **********