I am having error below when I try to run the simulation with CoolingTower:TwoSpeed specifying NominalCapacity for Performance Input Method. I input Nominal capacity ,Fan Power, for Low,High Fan Speed. What information do I need to input further to make this calculation work?

   ** Severe  ** CoolingTower:TwoSpeed "COOLING TOWER TWO SPEED 3". Nominal capacity input method has been specified and tower UA at low fan speed is being autosized.
   **   ~~~   ** Tower UA at low fan speed will be set according to nominal tower capacity.
   ** Severe  ** Bad starting values for UA
   **  Fatal  ** Autosizing of cooling tower UA failed for tower COOLING TOWER TWO SPEED

idf file

CoolingTower:TwoSpeed,
    Cooling Tower Two Speed 3,  !- Name
    Node 289,                !- Water Inlet Node Name
    Node 290,                !- Water Outlet Node Name
    Autosize,                !- Design Water Flow Rate {m3/s}
    Autosize,                !- High Fan Speed Air Flow Rate {m3/s}
    30000,                   !- High Fan Speed Fan Power {W}
    Autosize,                !- High Fan Speed U-Factor Times Area Value {W/K}
    Autocalculate,           !- Low Fan Speed Air Flow Rate {m3/s}
    0.5,                     !- Low Fan Speed Air Flow Rate Sizing Factor
    15000,                   !- Low Fan Speed Fan Power {W}
    0.16,                    !- Low Fan Speed Fan Power Sizing Factor
    Autocalculate,           !- Low Fan Speed U-Factor Times Area Value {W/K}
    0.6,                     !- Low Fan Speed U-Factor Times Area Sizing Factor
    0,                       !- Free Convection Regime Air Flow Rate {m3/s}
    0.1,                     !- Free Convection Regime Air Flow Rate Sizing Factor
    0,                       !- Free Convection Regime U-Factor Times Area Value {W/K}
    0.1,                     !- Free Convection U-Factor Times Area Value Sizing Factor
    NominalCapacity,         !- Performance Input Method
    1.25,                    !- Heat Rejection Capacity and Nominal Capacity Sizing Ratio
    3661000,                 !- High Speed Nominal Capacity {W}
    1359000,                 !- Low Speed Nominal Capacity {W}
    0.5,                     !- Low Speed Nominal Capacity Sizing Factor
    ,                        !- Free Convection Nominal Capacity {W}
    0.1,                     !- Free Convection Nominal Capacity Sizing Factor
    25.6,                    !- Design Inlet Air Dry-Bulb Temperature {C}
    25.6,                    !- Design Inlet Air Wet-Bulb Temperature {C}
    Autosize,                !- Design Approach Temperature {deltaC}
    Autosize,                !- Design Range Temperature {deltaC}
    0,                       !- Basin Heater Capacity {W/K}
    2,                       !- Basin Heater Setpoint Temperature {C}
    ,                        !- Basin Heater Operating Schedule Name
    ,                        !- Evaporation Loss Mode
    0.2,                     !- Evaporation Loss Factor {percent/K}
    0.008,                   !- Drift Loss Percent {percent}
    ,                        !- Blowdown Calculation Mode
    3,                       !- Blowdown Concentration Ratio
    ,                        !- Blowdown Makeup Water Usage Schedule Name
    ,                        !- Supply Water Storage Tank Name
    ,                        !- Outdoor Air Inlet Node Name
    1,                       !- Number of Cells
    MinimalCell,             !- Cell Control
    0.33,                    !- Cell Minimum  Water Flow Rate Fraction
    2.5,                     !- Cell Maximum Water Flow Rate Fraction
    1,                       !- Sizing Factor
    General;                 !- End-Use Subcategory