DCV doesn't work [OA introduction doesn't decrease according to people occupant]

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I am trying to implement Demand Control Ventilation for the building with FCU and PAU.
I referred to ExampleFile/HeatPumpSimpleDCV.idf file provided by EnergyPlus.
However, when I look at result, I cannot see OA reduction according to people occupants as shown below image.
Does anyone know what cause this problem?
I also attached the setting for Controller:OutdoorAir and Controller:MechanicalVentilation

Controller:OutdoorAir,
    Controller Outdoor Air 1,!- Name
    Node 158,                !- Relief Air Outlet Node Name
    Node 152,                !- Return Air Node Name
    Node 165,                !- Mixed Air Node Name
    Node 157,                !- Actuator Node Name
    0,                       !- Minimum Outdoor Air Flow Rate {m3/s}
    Autosize,                !- Maximum Outdoor Air Flow Rate {m3/s}
    NoEconomizer,            !- Economizer Control Type
    ModulateFlow,            !- Economizer Control Action Type
    18,                      !- Economizer Maximum Limit Dry-Bulb Temperature {C}
    64000,                   !- Economizer Maximum Limit Enthalpy {J/kg}
    ,                        !- Economizer Maximum Limit Dewpoint Temperature {C}
    ,                        !- Electronic Enthalpy Limit Curve Name
    -100,                    !- Economizer Minimum Limit Dry-Bulb Temperature {C}
    NoLockout,               !- Lockout Type
    FixedMinimum,            !- Minimum Limit Type
    ,                        !- Minimum Outdoor Air Schedule Name
    Always On Discrete,      !- Minimum Fraction of Outdoor Air Schedule Name
    Always On Discrete,      !- Maximum Fraction of Outdoor Air Schedule Name
    Controller Mechanical Ventilation 1,  !- Mechanical Ventilation Controller Name
    ,                        !- Time of Day Economizer Control Schedule Name
    No,                      !- High Humidity Control
    ,                        !- Humidistat Control Zone Name
    ,                        !- High Humidity Outdoor Air Flow Ratio
    Yes,                     !- Control High Indoor Humidity Based on Outdoor Humidity Ratio
    BypassWhenOAFlowGreaterThanMinimum;  !- Heat Recovery Bypass Control Type

  Controller:MechanicalVentilation,
    Controller Mechanical Ventilation 1,  !- Name
    Always On Discrete,      !- Availability Schedule Name
    Yes,                     !- Demand Controlled Ventilation
    ZoneSum,                 !- System Outdoor Air Method
    ,                        !- Zone Maximum Outdoor Air Fraction {dimensionless}
    1F_Dormitory1,           !- Zone 1 Name
    Dormitory Ventilation,   !- Design Specification Outdoor Air Object Name 1
    1F_Dormitory1 Design Spec Zone Air Dist,  !- Design Specification Zone Air Distribution Object Name 1
    1F_LiftLobby1,           !- Zone 2 Name
    Lift Lobby Ventilation,  !- Design Specification Outdoor Air Object Name 2
    1F_LiftLobby1 Design Spec Zone Air Dist,  !- Design Specification Zone Air Distribution Object Name 2
    1F_MainLobby1,           !- Zone 3 Name
    Main Lobby Ventilation,  !- Design Specification Outdoor Air Object Name 3
    1F_MainLobby1 Design Spec Zone Air Dist,  !- Design Specification Zone Air Distribution Object Name 3
    1F_PlayingArea1,         !- Zone 4 Name
    PlayingArea Ventilation, !- Design Specification Outdoor Air Object Name 4
    1F_PlayingArea1 Design Spec Zone Air Dist,  !- Design Specification Zone Air Distribution Object Name 4
    1F_PlayingArea2,         !- Zone 5 Name
    PlayingArea Ventilation, !- Design Specification Outdoor Air Object Name 5
    1F_PlayingArea2 Design Spec Zone Air Dist;  !- Design Specification Zone Air Distribution Object Name 5

DesignSpecification:OutdoorAir,
    Dormitory Ventilation,   !- Name
    Sum,                     !- Outdoor Air Method
    0.00494,                 !- Outdoor Air Flow per Person {m3/s-person}
    0.00039,                 !- Outdoor Air Flow per Zone Floor Area {m3/s-m2}
    0,                       !- Outdoor Air Flow per Zone {m3/s}
    0;                       !- Outdoor Air Flow Air Changes per Hour {1/hr}