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[EnergyPlus_Support] Severe error: MAT setpoint



hello all.

Lately i've been using IdealLoadsAirSystem template to quickly control a zone temperature. I have a temperature profile i want to keep, and from there i create a heating and cooling schedule with a dT of 0.5 degrees from the temp profile. And its been working well up till today, when i got this unexpected severe error:

** Severe  ** InitPurchasedAir: For ZoneHVAC:IdealLoadsAirSystem = ZMZONEHVAC:IDEALLOADSAIRSYSTEM serving Zone ZM
   **   ~~~   ** ..the supply air temperature for cooling [13.00] is greater than the zone cooling mean air temperature (MAT) setpoint [12.90].
   **   ~~~   ** ..For operative and comfort thermostat controls, the MAT setpoint is computed.
   **   ~~~   ** ..This error may indicate that the mean radiant temperature or another comfort factor is too warm.
   **   ~~~   **  Environment=FLUXO_EXT_BOTTOM, at Simulation time=04/24 03:10 - 03:20

I havent done anything diferently other than using a diferent temperature profile, and i'm not understading where the 13ºC limitation might come from. HVAC related, only have the two schedules for cooling/heating and one IdealLoadsAirSystem for the zone in question. any help in figuring this one out is very welcome, thank you.

Pedro



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