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Look at the VRF terminal unit object and check whether the fan operating mode schedule is cycling (0) or constant (anything other than 0). What you describe sounds like constant fan operating mode.

ZoneHVAC:TerminalUnit:VariableRefrigerantFlow,
  VRFFanSchedule,          !- Supply Air Fan Operating Mode Schedule Name

Schedule:Compact,
  VRFFanSchedule,          !- Name
  Any Number,              !- Schedule Type Limits Name
  Through: 12/31,          !- Field 1
  For: AllDays,            !- Field 2
  Until: 7:00,0.0,         !- Field 3
  Until: 18:00,1.0,        !- Field 5
  Until: 24:00,0.0;        !- Field 7