Kyle, Gerardo 

Found IP11 controller was energized but with its HV not selected (HV LEDs on but "flashing") -> selected HV output for pumps A and B and OK now -> Increased max. power from 100W to 200W and max. current from 10mA to 20mA (did this so as to match other units) -> Don't know why/how the HV outputs changed states on Saturday(?).