Question-and-Answer Resource for the Building Energy Modeling Community
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Probably, you need to share your osm file or idf file to ask someone identify the cause.
By the way, your model is Not VRF ("Variable" Refrigerant Flow). You are using Coil:Cooling:DX:SingleSpeed and Coil:Heating:Fuel . You should put ZoneHVAC:TerminalUnit:VariableRefrigerantFlow upstream of AirLoopHVAC:OutdoorAirSystem as shown below.
You can also refer to previous posts (VRF System & Terminal as DOAS for another VRF Terminal?, Zone VRF does not work with Airloop VRF).
