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SOLVED!

Okay. I Have solved the issue in the tair_sys by changing:

EnergyManagementSystem:Sensor,
    tair_sys,                !- Name
    NODE BLOCK1:ZONEWEST ZONE,  !- Output:Variable or Output:Meter Index Key Name
    System Node Temperature; !- Output:Variable or Output:Meter Name

in

EnergyManagementSystem:Sensor,
    tair_sys,                !- Name
    NODE BLOCK1:ZONEWEST IN, !- Output:Variable or Output:Meter Index Key Name
    System Node Temperature; !- Output:Variable or Output:Meter Name

I can say more that in the 9.4 version the EMS actuators did take action if the zone load was zero and not in the 9.0 version. (https://github.com/NREL/EnergyPlus/issues/8579)

tnx