Index: firmware/App/Controllers/DrainPump.c
===================================================================
diff -u -rbcf9339af8a725054a8c936ae572bb95e2bcd3f0 -r3e9328290bdbc18a940935bd7f7c720ca8432b1d
--- firmware/App/Controllers/DrainPump.c	(.../DrainPump.c)	(revision bcf9339af8a725054a8c936ae572bb95e2bcd3f0)
+++ firmware/App/Controllers/DrainPump.c	(.../DrainPump.c)	(revision 3e9328290bdbc18a940935bd7f7c720ca8432b1d)
@@ -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 **********