I changed my code slightly to indicate whether power is being applied in FORWARD or REVERSE mode by which 7 segment LED is lit. Here is void loop code snippet -
if (Mode == 1) {Serial.println("FORWARD"); // Make Chlorine, show Run Time remaining
digitalWrite (LpwrPin, LOW); //Turn Off the left digit display
digitalWrite (RpwrPin, HIGH); //Turn ON the right digit display
hours=(Rcount -((minutes - (StartDelay)) / 60)); //Calculate how many Run Time Hours are left
drawDigit(hours); //Show remaining Run Time Hours
}
if (Mode == 2) {Serial.println("REVERSE");
hours=(Rcount -((minutes - (StartDelay)) / 60)); //Calculate how many Run Time Hours are left
digitalWrite (RpwrPin, LOW); //Turn Off the right digit display
digitalWrite (LpwrPin, HIGH); //Turn ON the left digit display
drawDigit(hours); //Show remaining Run Time Hours
}
if (Mode == 3) {Serial.println("DONE");
digitalWrite (RpwrPin, LOW); //Turn Off the right digit display
digitalWrite (LpwrPin, LOW); //Turn Off the left digit display
}
}